JP2017005845A - Power control method and power control device - Google Patents

Abstract

A power control method capable of appropriately controlling the amount of power output from each of a plurality of power storage devices. A power control method includes a power storage device information acquisition step (S101) for acquiring a remaining capacity and a rated output capacity for each of a plurality of power storage devices, and power consumption of one or more loads for each of the plurality of power storage devices. A load information acquisition step (S103) for acquiring the control total amount, a control total amount calculation step (S104) for calculating the control total amount, and a distribution command value calculation step (S106, S107) for distributing the control total amount to a plurality of power storage devices, In the distribution command value calculation step (S106, S107), for each of the plurality of power storage devices, the minimum value among the remaining capacity, the rated output capacity, and the power consumption is calculated as a threshold (S106), and the electric energy below the threshold is calculated. Is calculated as a distribution amount (S107). [Selection] Figure 4

Description

  The present disclosure relates to a power control method for controlling the amount of power output from each of a plurality of power storage devices.

  Conventionally, a technique for calculating a shared power command value based on a chargeable / dischargeable remaining capacity ratio of each power storage facility for smoothing power at a connection point between a microgrid and a power system has been disclosed (Patent Document 1). reference).

JP 2012-249374 A

  However, in Patent Document 1, due to various restrictions, the power storage device is not charged and discharged according to the shared power command value, and the control accuracy may deteriorate.

  Therefore, the present disclosure provides a power control method and the like that can appropriately control the amount of power output from each of a plurality of power storage devices.

  A power control method according to an aspect of the present disclosure is a power control method for controlling the amount of power output per predetermined time from each of a plurality of power storage devices, and for each of the plurality of power storage devices, A power storage device information acquisition step for acquiring the remaining capacity of the power storage device and the rated output capacity per predetermined time of the power storage device, and each of the plurality of power storage devices is supplied from the power storage device and the power system Output from the plurality of power storage devices in accordance with a load information acquisition step of acquiring the power consumption amount per predetermined time of one or more loads that can use power, and a predetermined target power amount for the power supplied from the power system A total control amount calculating step for calculating a total control amount corresponding to the total power amount to be performed, and for each of the plurality of power storage devices, the control total amount A distribution command for allocating the total control amount to the plurality of power storage devices by calculating a power storage device distribution command value indicating a distribution amount that is a power amount distributed to the power storage device and output to the power storage device And calculating a minimum value of the remaining capacity, the rated output capacity, and the power consumption amount as a threshold value for each of the plurality of power storage devices. The power storage device distribution command value indicating the amount of power below a threshold as the distribution amount is calculated.

  Note that these comprehensive or specific aspects may be realized by a non-transitory recording medium such as a system, an apparatus, an integrated circuit, a computer program, or a computer-readable CD-ROM. The present invention may be realized by any combination of an integrated circuit, a computer program, and a recording medium.

  With the power control method according to one embodiment of the present disclosure, it is possible to appropriately control the amount of power output from each of the plurality of power storage devices.

FIG. 1 is a block diagram showing the configuration of the power control system in the first embodiment. FIG. 2 is a block diagram showing a configuration of the power control apparatus in the first embodiment. FIG. 3 is a block diagram showing the configuration of the customer facility in the first embodiment. FIG. 4 is a flowchart showing the operation of the power control apparatus in the first embodiment. FIG. 5A is a diagram illustrating an example of a simulation result of the power control device in the reference example. FIG. 5B is a diagram illustrating an example of a simulation result of the power control device according to Embodiment 1. FIG. 6 is a block diagram showing a configuration of the power control system in the second embodiment. FIG. 7 is a block diagram showing a configuration of the power control apparatus according to the second embodiment. FIG. 8 is a flowchart showing the operation of the power control apparatus in the second embodiment. FIG. 9 is a block diagram illustrating a configuration of the power control apparatus according to the third embodiment. FIG. 10 is a flowchart showing the operation of the power control apparatus in the third embodiment. FIG. 11 is a block diagram illustrating a configuration of customer equipment in the fourth embodiment. FIG. 12 is a block diagram showing a configuration of customer equipment in the fifth embodiment.

(Knowledge that became the basis of this disclosure)
In the prior art described in the background art section, command values are distributed according to the remaining capacity of the power storage device. However, in a power storage device installed in a customer's facility, charging / discharging may not be performed according to the shared power command value. As a result, the inventors have found that the control accuracy deteriorates.

  Specifically, charging / discharging of the power storage device is limited not only according to the remaining capacity of the power storage device but also according to the rating of the power storage device. Furthermore, the discharge of the power storage device installed in the customer's facility is limited according to the power consumption of the load installed in the customer's facility. In other words, the power storage device may not be allowed to discharge beyond the power consumption of the load.

  For example, when the power storage device installed in the same facility discharges beyond the power consumption of the load installed in the customer's facility, surplus power flows out to the power system (commercial system). Such a flow of active power toward the power system is also called a reverse power flow. The reverse power flow may be exceptionally recognized for promoting power generation using natural energy, but the reverse power flow accompanying the discharge of the power storage device may not be recognized.

  For this reason, when the power storage device receives a command value indicating discharge exceeding the power consumption of the load, the power storage device may not discharge according to the command value. Thereby, the reverse power flow accompanying the discharge of the power storage device is suppressed. However, this may deteriorate the control accuracy.

  Therefore, a power control method according to an aspect of the present disclosure is a power control method for controlling the amount of power output per predetermined time from each of a plurality of power storage devices, and each of the plurality of power storage devices A power storage device information acquisition step for acquiring a remaining capacity of the power storage device and a rated output capacity per predetermined time of the power storage device, and supplying each of the plurality of power storage devices from the power storage device and a power system A plurality of power storage devices according to a load information acquisition step of acquiring power consumption per predetermined time of one or more loads that can use the generated power, and a predetermined target power amount for the power supplied from the power system A control total amount calculating step for calculating a total control amount corresponding to the total power amount output from the control unit, and for each of the plurality of power storage devices, the control The control total amount is distributed to the plurality of power storage devices by calculating a power storage device allocation command value indicating a distribution amount that is a power amount distributed to the power storage device and is output to the power storage device. A distribution command value calculation step, wherein the distribution command value calculation step calculates, as a threshold value, a minimum value among the remaining capacity, the rated output capacity, and the power consumption amount for each of the plurality of power storage devices. Then, the power storage device distribution command value indicating the amount of power equal to or less than the threshold value as the distribution amount is calculated.

  Thus, for each of the plurality of power storage devices, not only the remaining capacity of the power storage device, but also the rated output capacity of the power storage device (such as an inverter output possible amount) and the power consumption of the load corresponding to the power storage device, An appropriate command value is calculated. Each of the plurality of power storage devices can perform discharge based on an appropriate command value. That is, with this power control method, it is possible to appropriately control the amount of power output from each of the plurality of power storage devices.

  For example, in the distribution command value calculation step, a load capable of changing power consumption is used as the one or more loads that can use power supplied from the power storage devices included in the plurality of power storage devices and the power system. When a certain controllable load is included, a load distribution command value indicating a change amount of power consumption of the controllable load is calculated, the change amount is reflected in the power consumption amount for the power storage device, and the remaining The minimum value of the capacity, the rated output capacity, and the power consumption amount reflecting the change amount is calculated as the threshold value, the change amount is reflected in the total control amount, and the change amount is reflected. The total control amount may be distributed to the plurality of power storage devices according to the threshold value.

  Thereby, the power consumption of the load is reduced, and an appropriate command value is calculated according to the reduced power consumption. For example, when the power consumption of an air conditioner or heat pump water heater is controlled as the power consumption of the load, the amount of discharge and the number of uses of the power storage device are reduced, and deterioration of the power storage device is suppressed.

  Further, for example, in the distribution command value calculation step, the power storage device distribution command value indicating the larger distribution amount as the threshold value is larger may be calculated.

  Thereby, a command value proportional to the threshold value is calculated. Therefore, the burden is appropriately distributed to the plurality of power storage devices.

  In addition, for example, in the distribution command value calculation step, the power storage device distribution command value that reduces the dispersion of the remaining capacity of the plurality of power storage devices may be calculated.

  Thereby, the remaining capacities of the plurality of power storage devices approach their average. Therefore, overcharge and overdischarge are suppressed.

  Further, for example, in the distribution command value calculation step, when the threshold value is smaller than a lower limit, the power storage device distribution command value indicating 0 as the distribution amount may be calculated.

  Thereby, discharge with low efficiency is suppressed and deterioration of the power storage device is suppressed. Further, the amount of processing can be reduced by reducing notifications or the like.

  Further, for example, in the distribution command value calculation step, for each of the plurality of power storage devices, the power storage device distribution command value indicating the distribution amount may be calculated with a resolution equal to or higher than a minimum resolution of a discharge amount of the power storage device. Good.

  Thereby, an appropriate command value is calculated. For example, it is possible to improve control accuracy by allocating a fractional amount of power smaller than the minimum resolution to other power storage devices.

  In addition, for example, the power control method further includes a solar power generation device that supplies power to the one or more loads that can use power supplied from the power storage devices included in the plurality of power storage devices and the power system. A solar power generation information acquisition step of acquiring the power supply amount per predetermined time of the power distribution, and in the distribution command value calculation step, the power supply amount is greater than the power consumption amount per predetermined time of the one or more loads. When the power storage device is small, the power supply amount is excluded from the power consumption amount, and the minimum value among the remaining capacity, the rated output capacity, and the power consumption amount from which the power supply amount is excluded. May be calculated as the threshold value.

  Thereby, even when the solar power generation device is installed, an appropriate command value is calculated according to the power supply amount of the solar power generation device.

  In addition, for example, the power control method further includes a solar power generation device that supplies power to the one or more loads that can use power supplied from the power storage devices included in the plurality of power storage devices and the power system. Solar power generation information acquisition step of acquiring the power supply amount per predetermined time, and in the distribution command value calculation step, when the power supply amount is larger than 0, 0 is set as the distribution amount of the power storage device The indicated power storage device distribution command value may be calculated.

  Thereby, even when a solar power generation device is installed, an appropriate command value is calculated depending on whether or not the solar power generation device is actually supplying power.

  In addition, for example, the power control method further acquires, for each of the plurality of power storage devices, a voltage at a power reception point of power supplied from the power system to a facility including the power storage device and the one or more loads. The distribution command value calculation step calculates a power storage device distribution command value indicating 0 as the distribution amount when the voltage is equal to or higher than an upper limit voltage for each of the plurality of power storage devices. May be.

  Thereby, when a voltage is more than an upper limit voltage, the output of an electrical storage apparatus is restrict | limited and abnormality of a voltage is suppressed.

  In addition, for example, the power control method further acquires, for each of the plurality of power storage devices, a voltage at a power reception point of power supplied from the power system to a facility including the power storage device and the one or more loads. A voltage acquisition step of acquiring a plurality of voltages corresponding to the plurality of power storage devices, and in the distribution command value calculation step, for each of the plurality of power storage devices, the plurality of voltages, the plurality of voltages The dischargeable amount is calculated from a predetermined relationship between the upper limit voltage and the variation amount of discharge of each of the plurality of power storage devices and the variation amount of each of the plurality of voltages. If the threshold value is smaller than the threshold value, the threshold value is changed to the dischargeable amount, and the power storage device distribution command value indicating the changed electric energy amount below the threshold value as the distribution amount is calculated. It may be.

  Thereby, the threshold value is adjusted so that the voltage does not exceed the upper limit voltage, and an appropriate command value is calculated.

  Further, for example, in the load information acquisition step, for each of the plurality of power storage devices, the power consumption amount per predetermined time of the one or more loads is predicted, and the predicted power consumption amount is set to the one or more power consumption devices. You may acquire as power consumption per said predetermined time of load.

  Thereby, an appropriate threshold value is calculated according to the prediction of the power consumption. Therefore, an appropriate command value is thereby calculated.

  Further, for example, the power control method may further include a notification step of notifying each of the plurality of power storage devices of the power storage device distribution command value calculated in the distribution command value calculation step.

  Thereby, it is possible to notify an appropriate command value to each of the plurality of power storage devices.

  Furthermore, these comprehensive or specific aspects may be realized by a non-transitory recording medium such as a system, an apparatus, an integrated circuit, a computer program, or a computer-readable CD-ROM. The present invention may be realized by any combination of an integrated circuit, a computer program, or a recording medium.

  Hereinafter, embodiments will be described with reference to the drawings. It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the scope of the claims. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  The electric energy usually means an integrated value of electric power per unit time and corresponds to energy. Here, the amount of power may be referred to as power amount. Moreover, electric power (power) and electric energy (energy) correspond to each other. Therefore, here, electric power may be used in the meaning of electric energy (energy), and electric energy may be used in the meaning of electric power (power). Moreover, electric power and electric energy may mean those values.

  Moreover, in the following description, prediction may be expressed as estimation.

(Embodiment 1)
In this embodiment, a power control device that controls the amount of power output from each of a plurality of power storage devices will be described.

  FIG. 1 is a block diagram showing a configuration of a power control system including a power control apparatus according to the present embodiment. As shown in FIG. 1, the power control system in the present embodiment includes a distribution transformer 101, a distribution line 102, a plurality of customer facilities 300, a communication line 103, and a power control device 200. .

  The distribution transformer 101 is a transformer that converts power supplied from the power system into an appropriate voltage to supply the load 302 with power. The distribution transformer 101 is, for example, a transformer or a pole transformer in a distribution substation.

  The distribution line 102 is a power line for electrically connecting the distribution transformer 101 and the load 302, and is a power line for supplying power from the distribution transformer 101 to the load 302.

  The customer facility 300 is a facility installed in a customer facility. The customer facility 300 includes a load 302, a power storage device 303, and a customer facility control device 301. These components included in the customer facility 300 are also installed in the customer facility. Note that the customer facility 300 may include a plurality of loads 302 and a plurality of power storage devices 303. Further, the consumer may be a high-pressure consumer or a low-pressure consumer. The customer facility 300 is not limited to the communication protocol.

  The load 302 is a device in the customer facility 300 and consumes power. The load 302 is, for example, a household electric device. As described above, the customer facility 300 may include a plurality of loads 302. Some of these loads 302 (controllable loads) adjust power consumption by stopping, changing settings or changing modes based on the distribution command value received from the power control apparatus 200.

  The power storage device 303 charges the power supplied from the power system. In addition, the power storage device 303 discharges and supplies power to the load 302. Power storage device 303 includes a storage battery, an inverter, and the like. The inverter performs AC / DC conversion when charging the storage battery. The inverter performs DC / AC conversion when discharging from the storage battery.

  In addition, the power storage device 303 notifies the power control device 200 of the remaining capacity and the like. The power storage device 303 performs charging or discharging based on the distribution command value received from the power control device 200.

  The customer facility control device 301 manages the load 302, the power storage device 303, and the like included in the customer facility 300, and controls these operations. For example, the communication between the power control device 200 and the load 302 and the communication between the power control device 200 and the power storage device 303 are relayed.

  The communication line 103 is a communication line for connecting the customer facility 300 including the customer facility control device 301, the load 302, and the power storage device 303 so that the power control device 200 can communicate with each other. The communication line 103 is realized by, for example, a wired LAN that conforms to the IEEE 802.3 standard, a wireless LAN that conforms to the IEEE 802.11a, b, g standard, or a public communication line such as a mobile phone line.

  The power control device 200 calculates a distribution command value based on the remaining capacity of the power storage device 303, the inverter rating of the power storage device 303, the power consumption amount of the load 302, and transmits it to the power storage device 303.

  FIG. 2 is a block diagram showing a configuration of power control apparatus 200 shown in FIG. As illustrated in FIG. 2, the power control device 200 includes a power storage device information acquisition unit 201, a load information acquisition unit 202, a total control amount calculation unit 203, and a distribution command value calculation unit 204.

  The power storage device information acquisition unit 201 acquires the amount of discharge power (output power amount) of the power storage device 303, the remaining capacity of the power storage device 303, and the inverter rating of the power storage device 303. Furthermore, the power storage device information acquisition unit 201 calculates an inverter output possible amount from the inverter rating as the rated output capacity. The power storage device information acquisition unit 201 transmits the discharge power amount to the control total amount calculation unit 203, and transmits the remaining capacity and the inverter output possible amount to the distribution command value calculation unit 204. A method of calculating the inverter output possible amount will be described in detail later.

  Since the inverter rating value is not basically changed, it is stored in advance in a storage unit (not shown) of the power control apparatus 200, and the power storage device information acquisition unit 201 reads the inverter rating value from the storage unit. But you can. The rating of the inverter is 5 kW, for example.

  The load information acquisition unit 202 acquires the power consumption amount of the load 302 and transmits it to the total control amount calculation unit 203 and the distribution command value calculation unit 204.

  The total control amount calculation unit 203 calculates the total control amount. The total control amount corresponds to the total power amount output from all the power storage devices 303. That is, the total control amount is determined based on the total power output from all the power storage devices 303. The total control amount may further correspond to the total control power amount for all controllable loads. Specifically, the total control amount may be an amount corresponding to the total value of the control power amounts for all power storage devices 303 and all controllable loads.

  For example, the total control amount corresponds to the difference between the total amount of received power that is the amount of power supplied from the power system and the target received power amount that is a target for the total amount of received power.

  The distribution command value calculation unit 204 is based on the remaining capacity, the inverter output possible amount, the power consumption amount, and the control total amount acquired from the power storage device information acquisition unit 201, the load information acquisition unit 202, and the control total amount calculation unit 203. The distribution command value of power storage device 303 is calculated and transmitted. A method for calculating the distribution command value will be described in detail later.

  FIG. 3 is a block diagram showing a configuration of the customer facility 300 shown in FIG. As shown in FIG. 3, the customer facility 300 includes a load 302, a power storage device 303, and a customer facility control device 301. In addition, the same code | symbol is attached | subjected about the component similar to already demonstrated FIG. 1, and detailed description may be abbreviate | omitted.

  The load 302 is classified into a controllable load 302a and an uncontrollable load 302b. That is, the plurality of loads 302 may include a controllable load 302a and an uncontrollable load 302b.

  The controllable load 302a is a load 302 capable of adjusting power consumption by stopping, setting change, mode change, or the like based on the distribution command value received from the power control apparatus 200. That is, the controllable load 302a includes a control unit that adjusts the power consumption based on the distribution command value. For example, the controllable load 302a is a heat pump water heater or the like.

  On the other hand, the uncontrollable load 302b is a load 302 whose power consumption cannot be adjusted based on the distribution command value received from the power control apparatus 200. That is, the uncontrollable load 302b does not have a control unit or a communication unit that adjusts power consumption based on the distribution command value. For example, the uncontrollable load 302b is a dryer or the like.

  Note that the customer facility 300 may include one or both of the controllable load 302a and the non-controllable load 302b.

  The customer facility control device 301 uses the communication line 103 to determine the amount of discharge power of the power storage device 303, the remaining capacity of the power storage device 303, the inverter rating of the power storage device 303, and the power consumption of the load 302 via the communication line 103. It transmits to the control apparatus 200. The customer facility control device 301 acquires the amount of discharged power, the remaining capacity, and the inverter rating for transmission to the power control device 200 from the power storage device 303.

  In addition, since the rated value of an inverter is not changed fundamentally, you may preserve | save beforehand at the memory | storage part (not shown) of the consumer equipment control apparatus 301. FIG. Moreover, the consumer equipment control apparatus 301 acquires the power consumption of the load 302 from a sensor or a meter (both not shown). When the load 302 can measure its own power consumption, the customer facility control device 301 may acquire the power consumption from the load 302.

  Furthermore, the customer equipment control device 301 receives the distribution command value from the power control device 200 via the communication line 103 and transmits it to the power storage device 303 and the controllable load 302a. When the inverter rating of power storage device 303 is stored in power control device 200 in advance, customer facility control device 301 does not have to transmit the inverter rating of power storage device 303.

  FIG. 4 is a flowchart showing the operation of the power control apparatus 200 shown in FIG. First, in step S <b> 101, the power storage device information acquisition unit 201 acquires the amount of discharged power, the remaining capacity, and the inverter rating as power storage device information from the customer facility control device 301. In addition, when the rating of the inverter is stored in the storage unit in advance, the power storage device information acquisition unit 201 acquires the inverter rating from the storage unit. In this case, the power storage device information acquisition unit 201 may not acquire the inverter rating from the customer facility control device 301.

  Next, in step S102, the power storage device information acquisition unit 201 calculates an inverter output possible amount as a rated output capacity by the following equation (1).

  (Inverter output possible amount) = (Inverter rating) × (Control cycle) Expression (1)

  Here, the control cycle is a cycle (predetermined time) for controlling the power storage device 303, and is, for example, 5 minutes. The inverter output possible amount corresponds to the amount of power that the power storage device 303 outputs per predetermined time with a predetermined rating. The control cycle may be changed dynamically or may not be uniform.

  Next, in step S <b> 103, the load information acquisition unit 202 acquires the power consumption amount as load information from the customer facility control device 301. For example, the load information acquisition unit 202 acquires the power consumption per control period (predetermined time) of one or more loads 302 in the customer facility control device 301 from each of the plurality of customer facility control devices 301. Note that step S103 may be performed before step S101.

  Further, step S101 (step S102) and step S103 need not be performed in the same cycle. Further, for example, the execution cycle of step S101 (step S102) and the execution cycle of step S103 may be changed according to fluctuations in the remaining capacity and the power consumption.

  Next, in step S104, the total control amount calculation unit 203 calculates the total control amount using, for example, the following formulas (2) to (4). Equation (4) is an example of a method for calculating the total sum of predicted received electric energy in Equation (2). An arbitrary prediction method can be applied to the calculation method of the total sum of the predicted received power amounts in Expression (2).

(Total control amount) = (Total sum of actual received power amount) + (Total sum of predicted received power amount) − (Target received power amount) (2)
(Sum of actual received power) = (Sum of actual power consumption) − (Sum of actual discharge power) Expression (3)
(Sum of predicted power reception amount) = (Sum of actual power consumption) × (Remaining control time) / (Control execution time) (4)

  The control execution time corresponds to the time from the start of the control period to a point in the middle of the control period. The control period is, for example, a period longer than one control cycle. The remaining control time corresponds to the time from the middle of the control period to the end of the control period.

  The total of the actual power consumption corresponds to the total power consumption of all the loads 302 during the control execution time. The sum total of the actual discharge power amount corresponds to the sum of the discharge power amounts of all the power storage devices 303 during the control execution time. The sum of the predicted received power amounts is the sum of the predicted received power amounts when it is assumed that the power consumption amount of the load 302 does not change and the power storage device 303 does not output power. Corresponds to the total amount of power predicted as the amount of power.

  The target received power amount is a target power amount with respect to the power supplied from the power system. For example, the target received power amount is determined in advance so that the power supply amount of the power system is maintained within a predetermined range. Note that the power supplied by the power system corresponds to, for example, the purchased power of the consumer and corresponds to the received power from the power system. The target received power amount may be acquired by communication, or may be stored in advance in the storage unit of the power control apparatus 200. The target received power amount in Expression (2) corresponds to the target received power amount in the control period.

  In Formula (2), when the total control amount is calculated as 0, the power control device 200 does not control the power storage device 303 and the controllable load 302a. When the total control amount is positive, power control device 200 causes power storage device 303 to discharge or controls controllable load 302a. When the total control amount is negative, power control device 200 charges power storage device 303. When the total control amount is negative, the power control apparatus 200 may not control the controllable load 302a.

  In Expression (2), the dead band is set, and the power control apparatus 200 may set the total control amount to 0 if it is within the dead band range.

  Moreover, in Formula (3), the sum total of the actual received power amount is the difference between the total sum of the actual power consumption amount and the total sum of the actual discharge power amount from the start of the control period until the control execution time elapses. When the control execution time is 0, that is, at the start of the control period, the total amount of actual received power is 0. In this case, the total control amount corresponds to the difference between the total predicted received power amount and the target received power amount. In this case, the sum of the power consumption amounts in the past control period (for example, the immediately preceding control period) may be used as the sum of the predicted received power amounts.

  Next, in step S105, the distribution command value calculation unit 204 calculates a distribution command value for the controllable load 302a (hereinafter, the distribution command value for the controllable load 302a may be referred to as a load distribution command value). . The distribution command value calculation unit 204 calculates a load distribution command value for the controllable load 302a so that the power consumption of the controllable load 302a is smaller or larger than the current amount.

  Next, in step S <b> 106, distribution command value calculation section 204 calculates a threshold value for each power storage device 303. The distribution command value calculation unit 204 changes the threshold value calculation method based on the load distribution command value calculated in step S105.

  When the load distribution command value for the load 302 is 0, the distribution command value calculation unit 204 calculates the threshold value of the power storage device 303 corresponding to the load 302 by the following equation (5) (here, for convenience, this threshold value is used). May be referred to as a first threshold). When the load distribution command value for the load 302 is not 0, the distribution command value calculation unit 204 calculates the threshold value of the power storage device 303 corresponding to the load 302 by the following equation (6) (here, for convenience, this threshold value is set). May be referred to as a second threshold).

First threshold value _i = min (inverter output possible amount _i , power consumption amount _i , remaining capacity _i ) Equation (5)
Second threshold value _i = min (inverter output possible amount _i , power consumption amount _i + load distribution command value _i , remaining capacity _i ) Equation (6)

In Expression (5) and Expression (6), i is an identifier of the power storage device 303. The remaining capacity _i in Expression (5) and Expression (6) is the remaining capacity that can be discharged in the control cycle (for example, 10 minutes) among the remaining capacity acquired by the power storage device information acquisition unit 201 in Step S101. Specifically, the remaining capacity that can be discharged in the control cycle is calculated by min (remaining capacity, rated capacity of the storage battery × (control cycle ÷ 1h) × discharge rate).

  That is, the remaining capacity of the power storage device 303 that can be discharged per predetermined time may be used as the remaining capacity of the power storage device 303. The power storage device information acquisition unit 201 may calculate and acquire the remaining capacity that can be discharged per predetermined time.

The inverter output possible amount _i is a value calculated by the power storage device information acquisition unit 201 using the equation (1) in step S102. The power consumption amount _i is a value acquired by the load information acquisition unit 202 in step S103. In equation (6), the load distribution command value _i is a value calculated by the distribution command value calculation unit 204 in step S105. The load distribution command value _i indicates a positive value when the power consumption amount is increased, and indicates a negative value when the power consumption amount is decreased. In Expression (6), the load distribution command value _i is reflected (added) to the power consumption amount _i .

  Next, in step S107, the distribution command value calculation unit 204 calculates the distribution command value to the power storage device 303 by the following equation (7) or the like (hereinafter, the distribution command value to the power storage device 303 is allocated to the power storage device distribution). Sometimes called command value). When the power storage device distribution command value calculated by equation (7) or the like exceeds the first threshold value calculated by equation (5) or the second threshold value calculated by equation (6), the distribution command value Calculation unit 204 restricts the power storage device distribution command value with the first threshold value or the second threshold value.

In Expression (7), the load distribution command value _i is reflected in the total control amount. Then, the total control amount reflecting the load distribution command value _i is distributed to the plurality of power storage devices 303 according to the first threshold value _i or the second threshold value _i . Expression (7) is an example, and an optimization method or the like may be applied. For example, the distribution command value calculation unit 204 may calculate a power storage device distribution command value for making the remaining capacity variation among the plurality of power storage devices 303 smaller than the current state.

  More specifically, the distribution command value calculation unit 204 sets the power storage device distribution command value for adjusting the standard deviation of the remaining capacity in the plurality of power storage devices 303 within a range corresponding to 10% of the rated capacity of the storage battery. It may be calculated. Further, for example, the distribution command value calculation unit 204 stores the power so that the standard deviation of the remaining capacity in the plurality of power storage devices 303 after the control is 5% smaller than the standard deviation of the remaining capacity in the plurality of power storage devices 303 before the control. A device distribution command value may be calculated.

  The above 10% and 5% are examples of the target threshold regarding the standard deviation, and the target threshold is not limited to this.

  For example, when the first threshold value or the second threshold value is smaller than a predetermined lower limit, the distribution command value calculation unit 204 may calculate the power storage device distribution command value as 0 in order to simplify the processing. .

  For example, the distribution command value calculation unit 204 may calculate the power storage device distribution command value with a resolution equal to or higher than the minimum resolution of the output of the power storage device 303. Here, the minimum resolution of the output of the power storage device 303 is a predetermined minimum resolution for the power storage device 303 and corresponds to the gradation of the discharge amount of the power storage device 303. Then, the distribution command value calculation unit 204 may distribute a fractional amount of power smaller than the minimum resolution to other power storage devices 303.

  In step S108, the distribution command value calculation unit 204 transmits (notifies) the calculated load distribution command value and the power storage device distribution command value to the customer facility control device 301. Transmission (notification) of the distribution command value may be performed by an external device.

  Here, when the power storage device 303 and the controllable load 302a are included in the customer facility 300, the distribution command value calculation unit 204 separately sends the load distribution command value and the power storage device distribution command value to the customer facility control device 301. May be. Alternatively, distribution command value calculation unit 204 may send the sum of the load distribution command value and the power storage device distribution command value to consumer facility control device 301.

  When the distribution command value calculation unit 204 sends the total value, the customer facility control device 301 disassembles the received total value and controls each of the power storage device 303 and the controllable load 302a. Therefore, the details of the control are left to the discretion of the customer facility control device 301. That is, when the customer facility control device 301 receives the combined value of the load distribution command value and the power storage device distribution command value, it may control only the power storage device 303 in consideration of, for example, comfort.

  If the control period has not ended after step S108, the process is repeated from step S101.

  Note that the processing performed by other devices in the operations illustrated in FIG. 4 may not be performed by the power control device 200. For example, when transmission (notification) of the distribution command value is performed by an external device, step S108 may be omitted. Further, when the controllable load 302a is not controlled, step S105 may be omitted. Further, when the rated output capacity is acquired as an element of the power storage device information, step S102 may be omitted.

  In addition, the rated output capacity may be acquired as an element of power storage device information by calculation in step S102 or the like.

  Next, a simulation result in which the power storage device installed in the customer's facility is controlled by the power control device will be described with reference to FIGS. 5A and 5B.

  FIG. 5A is a diagram illustrating an example of a simulation result of control performed by the power control apparatus in the reference example. In this reference example, the total control amount is distributed only by the remaining capacity of the power storage device.

  In FIG. 5A, the horizontal axis represents the control period (5 to 15 minutes) of the power control apparatus. The vertical axis represents the control accuracy. Here, the control accuracy is an index representing the degree of achievement of control, and corresponds to the ratio of the amount of electric power actually controlled to the total control amount. For example, the control accuracy is calculated by 100% − (error rate with respect to the target received power amount), and if the total of the actual received power amounts coincides with the target received power amount at the end of the control, the control accuracy is 100%. .

  As shown in FIG. 5A, if the control cycle of the power control apparatus in the reference example is 5 minutes, it is possible to perform control with an accuracy close to 100%. However, the control accuracy is greatly lowered as the control period is longer. This is because, in the reference example, charging / discharging corresponding to the distribution command value is not performed due to restrictions such as power consumption. The power control device redistributes the amount of power that has not been charged / discharged to other power storage devices. However, the longer the control cycle is, the fewer the opportunities for redistribution, and the greater the control accuracy.

  On the other hand, FIG. 5B is a diagram illustrating an example of a simulation result of control performed by the power control apparatus 200 according to the present embodiment. In FIG. 5B, the horizontal axis represents the control cycle (5 to 15 minutes) of power control apparatus 200 in the present embodiment. The vertical axis represents the control accuracy.

  As shown in FIG. 5B, in power control apparatus 200 in the present embodiment, control accuracy close to 100% can be obtained even if the control period is 15 minutes. This is because the power control device 200 in the present embodiment generates the distribution command value based on the constraints of the power storage device 303 installed in the customer's facility, so that the power storage device 303 corresponds to the distribution command value. This is because discharging can be performed.

  Further, the control accuracy when the control cycle of the power control apparatus 200 in this embodiment is 15 minutes is higher than the control accuracy when the control cycle of the power control apparatus in the reference example is 5 minutes. That is, in power control device 200 in the present embodiment, even if the transmission frequency of the distribution command value transmitted to power storage device 303 is 1/3 of the reference example, control accuracy equal to or higher than that of the reference example can be obtained.

  Specific examples will be described below. As a premise of this specific example, the control period is 30 minutes, the control cycle is 10 minutes, and the target received power amount in the control period is 6 kWh. There is no controllable load 302a, and two power storage devices 303, the first power storage device 303 and the second power storage device 303, are controlled. The inverter rating of the first power storage device 303 is 60 kW, and the remaining capacity is 40 kWh. On the other hand, the inverter rating of the second power storage device 303 is 30 kW, and the remaining capacity is 20 kWh.

  Further, as a premise of this specific example, the control execution time is 10 minutes, and the power consumption amount of the load 302 corresponding to the first power storage device 303 in that 10 minutes is 1 kWh, which corresponds to the second power storage device 303. The power consumption of the load 302 is 2 kWh. In addition, each of the first power storage device 303 and the second power storage device 303 in the control execution time (10 minutes) is 0 kWh.

  Based on the above assumption, the inverter output possible amounts of the first power storage device 303 and the second power storage device 303 are calculated as 10 kWh and 5 kWh, respectively, from Expression (1). Further, the total sum of the actual received power amounts is calculated as 3 kWh from Equation (3). Moreover, the sum total of predicted received electric energy is calculated as 6 kWh from Formula (4). Therefore, the total control amount is calculated as 3 kWh with respect to 6 kWh, which is the target received power amount, from Equation (2).

  Next, the inverter output possible amount of the first power storage device 303 is 10 kWh. Further, the power consumption of the load 302 corresponding to the first power storage device 303 is 1 kWh. The remaining capacity of the first power storage device 303 that can be discharged is 6.67 kWh (= 40 kWh × (10 minutes ÷ 1 h) × discharge rate 1C). Therefore, the first threshold value is calculated as 1 kWh from Equation (5). Similarly, the first threshold value of second power storage device 303 is calculated as 2 kWh from Equation (5).

  Next, from Equation (7), the power storage device distribution command value for the first power storage device 303 is calculated as 1 kWh. On the other hand, the power storage device distribution command value for the second power storage device 303 is calculated as 2 kWh. Therefore, the first power storage device 303 discharges 1 kWh in the next 10 minutes, and the second power storage device 303 discharges 2 kWh in the next 10 minutes. In this case, the total value of the discharge amount is 3 kWh, which matches the total control amount. Therefore, the control accuracy in the next 10 minutes is 100%.

  Here, as in the reference example, when the distribution is performed only according to the remaining capacity, the power storage device distribution command values for the first power storage device 303 and the second power storage device 303 are calculated as 2 kWh and 1 kWh, respectively. The

  However, discharging is not performed beyond the power consumption of the load 302 corresponding to the power storage device 303. Therefore, the first power storage device 303 discharges 1 kWh in the next 10 minutes, and the second power storage device 303 discharges 1 kWh in the next 10 minutes.

  Therefore, the total value of the discharge amount in the next 10 minutes is 2 kWh, and the discharge of 1 kWh is insufficient for the total control amount of 3 kWh. Therefore, the control accuracy in the next 10 minutes is 66.67%.

  In contrast, power control device 200 in the present embodiment calculates a command value based not only on the remaining capacity but also on the rated output capacity (inverter output possible amount) and the power consumption. Thereby, the power control apparatus 200 can suppress deterioration of the control accuracy.

  In the present embodiment, in the calculation of the first threshold value and the second threshold value, the power consumption immediately before the load 302 (for example, if the control period is 10 minutes, the power consumption for the past 10 minutes) is It is used. However, the predicted power consumption amount of the next control cycle may be used instead of the previous power consumption amount. Any prediction method can be applied to the calculation method of the predicted power consumption. For example, the load information acquisition unit 202 may acquire the predicted power consumption amount by linearly predicting the power consumption amount from a change in the past power consumption amount.

(Embodiment 2)
This Embodiment demonstrates the case where the solar power generation device is installed in the customer's facility. In addition, the same code | symbol is attached | subjected about the component similar to Embodiment 1 already demonstrated, and detailed description may be abbreviate | omitted.

  FIG. 6 is a block diagram showing the configuration of the power control system in the present embodiment. In addition, the same code | symbol is attached | subjected about the component similar to already demonstrated FIG. 1, and detailed description may be abbreviate | omitted.

  As shown in FIG. 6, compared to the first embodiment, in the present embodiment, the customer facility 300 is additionally provided with a solar power generation device (power generation device) 304 that generates power using sunlight. As a component. That is, the solar power generation device 304 is installed in the customer's facility.

  The solar power generation device 304 supplies power to the load 302 and the power storage device 303. Moreover, the solar power generation device 304 may supply power to the power system. Then, the solar power generation device 304 notifies the power control device 200 of the power supply amount via the customer facility control device 301. The power supply amount of the solar power generation device 304 may be expressed as the output power amount of the solar power generation device 304 or the power generation power amount of the solar power generation device 304.

  FIG. 7 is a block diagram showing a configuration of power control apparatus 200 shown in FIG. In addition, about the component similar to FIG. 2 already demonstrated, the same code | symbol may be attached | subjected and detailed description may be abbreviate | omitted.

  As illustrated in FIG. 7, the power control device 200 includes a power storage device information acquisition unit 201, a load information acquisition unit 202, a control total amount calculation unit 203, a distribution command value calculation unit 204, and a solar power generation information acquisition unit. 205. That is, compared with Embodiment 1, the power control apparatus 200 according to the present embodiment includes a photovoltaic power generation information acquisition unit 205 as an additional component.

  The solar power generation information acquisition unit 205 acquires the amount of power generated by the solar power generation device 304 as solar power generation information from the customer facility control device 301 of the customer facility 300 in which the solar power generation device 304 is installed.

  FIG. 8 is a flowchart showing the operation of the power control apparatus 200 shown in FIG. First, in step S <b> 201, the solar power generation information acquisition unit 205 acquires the generated power amount of the solar power generation device 304 from the customer facility control device 301 as solar power generation information.

  Next, in step S <b> 202, the power storage device information acquisition unit 201 acquires the amount of discharged power, the remaining capacity, and the inverter rating of the power storage device 303 as power storage device information from the customer facility control device 301. Next, in step S <b> 203, the power storage device information acquisition unit 201 calculates the rated output capacity of the power storage device 303. Next, in step S204, the load information acquisition unit 202 calculates the power consumption amount of the load 302 as load information. These processes are the same as those in the first embodiment.

  Next, in step S205, the total control amount calculation unit 203 calculates the total control amount according to the power consumption amount, the output power amount of the solar power generation device 304, and the like. The total control amount calculation unit 203 calculates the total control amount by, for example, the following equation (8).

  (Total control amount) = (Sum of actual received power amount) − (Sum of actual generated power amount) + (Sum of predicted received power amount) − (Sum of predicted generated power amount) − (Target received power amount) Formula (8)

  Expression (8) is an expression corresponding to Expression (2). Specifically, the sum of the actual received power amount, the sum of the predicted received power amount, and the target received power amount in Expression (8) are the sum of the actual received power amount and the predicted received power amount in Expression (2). And the target received power amount.

  Then, Expression (8) includes subtraction of the total of the actual generated electric energy and subtraction of the total of the predicted generated electric energy as compared with Expression (2). The sum total of the actual power generation amount in Expression (8) is the sum total of the power generation amounts (power supply amounts) of all the solar power generation devices 304 during the control execution time. The total predicted power generation amount is the sum of the predicted power generation amounts (predicted power supply amounts) of all the solar power generation devices 304 in the remaining control time.

  In the equation (8), when the control execution time is 0, that is, at the start of the control period, the total of the actual received power amount and the total of the actual generated power amount are each 0. In this case, the control total amount is calculated from the sum of the predicted received power amount, the sum of the predicted generated power amount, and the target received power amount. In this case, the sum of the power consumption amounts in the previous control period may be used as the sum of the predicted received power amounts. Moreover, the sum total of the power generation amount in the previous control period may be used as the sum of the predicted power generation amount.

  An arbitrary prediction method can be applied to the calculation method of the predicted power generation amount. For example, the predicted power generation amount may be calculated using a formula in which the power consumption amount in Formula (4) is replaced with the power generation amount.

  In Expression (8), when the total control amount is 0, the power control device 200 does not control the power storage device 303 and the controllable load 302a. When the total control amount is positive, power control device 200 causes power storage device 303 to discharge or controls controllable load 302a. When the total control amount is negative, power control device 200 charges power storage device 303. When the total control amount is negative, the power control apparatus 200 may not control the controllable load 302a.

  Next, in step S206, the distribution command value calculation unit 204 calculates a distribution command value for the controllable load 302a. This process is the same as in the first embodiment.

Next, in step S207, the distribution command value calculation unit 204 calculates a threshold value of each power storage device 303 by the following equation (9) (here, for convenience, this threshold value may be referred to as a third threshold value). ). Equation (9) is a threshold value calculation method used when the output of the power storage device 303 is limited when the generated power amount _i > 0.

[In case of generated electric energy _i ≤ consumed electric energy _i ]
Third threshold value _i = min (inverter output possible amount _i , power consumption amount _i -generated power amount _i , remaining capacity _i )
[When power generation amount _i > power consumption amount _i ]
Third threshold value _i = min (inverter output possible amount _i , 0, remaining capacity _i ) = 0
... Formula (9)

In addition, when the output of power storage device 303 is not limited when power generation amount _i > 0, distribution command value calculation unit 204 uses Formula (5) or Formula (6) instead of Formula (9) to store the power storage device. A threshold value of 303 may be calculated.

Further, in the equation (9), the power consumption amount _i may be replaced with a power consumption amount _{i +} load distribution command value _i. That is, the power consumption amount reflecting the load distribution command value may be used.

  Next, in step S208, the distribution command value calculation unit 204 calculates a power storage device distribution command value to the power storage device 303 using the following equation (10) or the like. When the power storage device distribution command value calculated by equation (10) or the like exceeds the third threshold value calculated by equation (9), distribution command value calculation unit 204 sets the power storage device distribution command value to the third threshold value. Limit by threshold. Expression (10) is an example, and an optimization method or the like may be applied.

Incidentally, if the output of the power storage device 303 is limited to 0 in the generated power quantity _i> 0, regardless of the relationship between the generated power quantity _i and the power consumption amount _i, the third threshold value _i in power generation amount _i> 0 May be set to zero. As a result, when the generated power amount _i > 0, the power storage device distribution command value _i is limited to 0, and the output of the power storage device 303 is limited to 0.

  Next, in step S <b> 209, the distribution command value calculation unit 204 transmits the power storage device distribution command value to the power storage device 303 and transmits the load distribution command value to the load 302 via the customer facility control device 301. Thereby, the distribution command value calculation unit 204 notifies each distribution command value. This process is the same as in the first embodiment.

  Specific examples will be described below. As a premise of this specific example, the control period is 30 minutes, the control cycle is 10 minutes, and the target received power amount in the control period is 4 kWh. There is no controllable load 302a, and two power storage devices 303, the first power storage device 303 and the second power storage device 303, are controlled. The inverter rating of the first power storage device 303 is 60 kW, and the remaining capacity is 40 kWh. On the other hand, the inverter rating of the second power storage device 303 is 30 kW, and the remaining capacity is 20 kWh.

  Further, as a premise of this specific example, the control execution time is 10 minutes, and the power consumption amount of the load 302 corresponding to the first power storage device 303 in that 10 minutes is 1 kWh, which corresponds to the second power storage device 303. The power consumption of the load 302 is 2 kWh. In addition, each of the first power storage device 303 and the second power storage device 303 in the control execution time (10 minutes) is 0 kWh.

  Moreover, as a premise of this specific example, the solar power generation device 304 is provided in the customer facility 300 including the second power storage device 303. And in control implementation time (10 minutes), the electric power generation amount of the solar power generation device 304 corresponding to the 2nd electrical storage apparatus 303 is 1 kWh.

  Based on the above assumption, the inverter output possible amounts of the first power storage device 303 and the second power storage device 303 are calculated as 10 kWh and 5 kWh, respectively, from Expression (1). Further, the total sum of the actual received power amounts is calculated as 3 kWh from Equation (3). Moreover, the sum total of predicted received electric energy is calculated as 6 kWh from Formula (4). In addition, the total sum of the predicted power generation amounts is calculated as 2 kWh when calculated by the same method as in equation (4) (not limited to equation (4)).

  Therefore, the total control amount is calculated as 2 kWh with respect to 4 kWh, which is the target received power amount, from Equation (8).

  Next, with respect to the first power storage device 303, in Expression (9), the inverter output possible amount is 10 kWh, the power consumption amount is 1 kWh, the generated power amount is 0 kWh, and the dischargeable remaining capacity is 6.67 kWh (= 40 kWh × ( 10 minutes ÷ 1h) × discharge rate 1C). Therefore, from Equation (9), the third threshold value of the first power storage device 303 is calculated as 1 kWh.

  On the other hand, with respect to the second power storage device 303, in Expression (9), the inverter output possible amount is 5 kWh, the power consumption amount is 2 kWh, the generated power amount is 1 kWh, and the remaining capacity is 3.33 kWh (= 20 kWh × (10 minutes ÷ 1h). ) × discharge rate 1C). Therefore, from Equation (9), the third threshold value of the second power storage device 303 is calculated as 1 kWh.

  Next, from equation (10), the power storage device distribution command value of the first power storage device 303 is calculated as 1 kWh, and the power storage device distribution command value of the second power storage device 303 is calculated as 1 kWh. Therefore, the first power storage device 303 discharges 1 kWh in the next 10 minutes, and the second power storage device 303 discharges 1 kWh in the next 10 minutes. The total value of the discharge amount is 2 kWh, which matches the total control amount. Therefore, the control accuracy in the next 10 minutes is 100%.

  Here, when distribution is performed according to only the remaining capacity, the power storage device distribution command values of the first power storage device 303 and the second power storage device 303 are calculated as 1.33 kWh and 0.67 kWh, respectively. However, in the power storage device 303, discharge may not be performed exceeding (power consumption-generated power amount). In this case, the first power storage device 303 discharges 1 kWh in the next 10 minutes, and the second power storage device 303 discharges 0.67 kWh in the next 10 minutes.

  Accordingly, in this case, the total value of the discharge amount in the next 10 minutes is 1.67 kWh, and the discharge of 0.33 kWh is insufficient for the total control amount of 2 kWh. Therefore, the control accuracy in the next 10 minutes is 83.5%.

  On the other hand, the power control apparatus 200 according to the present embodiment calculates the command value based on not only the remaining capacity but also the rated output capacity, the power consumption amount, and the generated power amount. Thereby, the power control apparatus 200 can suppress deterioration of the control accuracy.

  In the present embodiment, in the calculation of the third threshold value, the immediately preceding power consumption amount and the immediately preceding generated power amount (for example, if the control cycle is 10 minutes, the consumed power amount and the generated power amount for the past 10 minutes). ) Is used. However, the predicted power consumption and predicted power generation amount of the next control cycle may be used instead of the immediately previous power consumption amount and the previous power generation power amount. An arbitrary prediction method can be applied to the calculation method of the predicted power consumption and the predicted power generation amount.

(Embodiment 3)
In this embodiment, a power control device that controls a plurality of power storage devices based on a voltage will be described. In addition, the same code | symbol is attached | subjected about the component similar to Embodiment 1 or Embodiment 2 already demonstrated, and detailed description may be abbreviate | omitted.

  FIG. 9 is a block diagram showing a configuration of the power control apparatus in the present embodiment. In addition, about the component similar to FIG. 2 already demonstrated, the same code | symbol may be attached | subjected and detailed description may be abbreviate | omitted.

  As illustrated in FIG. 9, the power control device 200 includes a power storage device information acquisition unit 201, a load information acquisition unit 202, a total control amount calculation unit 203, a distribution command value calculation unit 204, and a voltage acquisition unit 206. Prepare. That is, compared with Embodiment 1, power control apparatus 200 in the present embodiment includes voltage acquisition unit 206 as an additional component. For simplification, the photovoltaic power generation information acquisition unit 205 shown in FIG. 7 is omitted.

  The voltage acquisition unit 206 acquires the power receiving point voltage in each customer facility 300 from the customer facility control device 301. Note that the customer facility control device 301 may acquire a voltage obtained from a sensor or meter (none of which is shown) that measures the voltage of power obtained from the power system in the customer facility 300 as the voltage at the power receiving point. Good.

  FIG. 10 is a flowchart showing the operation of the power control apparatus 200 shown in FIG. First, in step S <b> 301, the voltage acquisition unit 206 acquires a voltage from the customer facility control device 301.

  Next, in step S302, the power storage device information acquisition unit 201 acquires the amount of discharged power, the remaining capacity, and the inverter rating as power storage device information. In step S303, the power storage device information acquisition unit 201 calculates a rated output capacity. In step S304, the load information acquisition unit 202 acquires power consumption as load information. In step S305, the total control amount calculation unit 203 calculates the total control amount. In step S306, the distribution command value calculation unit 204 calculates a load distribution command value. These processes are the same as those in the first embodiment.

  Next, in step S307, the distribution command value calculation unit 204 calculates a threshold value. The distribution command value calculation unit 204 may calculate a first threshold value or a second threshold value. In addition, the distribution command value calculation unit 204 may calculate the third threshold based on the configuration and operation shown in the second embodiment. In addition, the distribution command value calculation unit 204 calculates the dischargeable amount by the following equation (11).

In the above formula (11), _{P i} is the dischargeable quantity of the power storage device 303 indicated by i. α _ij is a sensitivity coefficient representing how much the voltage at the power receiving point corresponding to the power storage device 303 indicated by j increases when the discharge of the power storage device 303 indicated by i increases. V _i is (the upper limit value of the voltage) − (the voltage value _i acquired by the voltage acquisition unit 206). T is a control period, for example, 5 minutes.

For example, when V _i is negative, the distribution command value calculation unit 204 calculates the dischargeable amount of the power storage device 303 with V _i = 0. Thus, if V _i is out of the upper limit, discharge amount is 0 is calculated.

Next, the distribution command value calculation unit 204 calculates the threshold value of each power storage device 303 by the following formula (12) (here, for convenience, this threshold value may be referred to as a fourth threshold value). Note that, although all of the first threshold value _i , the second threshold value _i , and the third threshold value _i are described in the expression (12), the distribution command value calculation unit 204 does not necessarily require the dischargeable amount _i. Te, the first threshold value _i, the second threshold value _i, and is not necessary to compare all the third threshold value _i, may be used to threshold _i calculated in step S106 or step S207,.

Fourth threshold value _i = min (first threshold value _i , second threshold value _i , third threshold value _i , dischargeable amount _i ) Equation (12)

  That is, when the threshold value calculated in advance is larger than the dischargeable amount, the distribution command value calculation unit 204 limits the threshold value to the dischargeable amount. Thereby, the threshold value is adjusted so that the voltage does not exceed the upper limit.

The upper limit is a voltage that is predetermined with respect to the reference voltage so that the load 302 or other circuits are not damaged. In Japan, 107V is predetermined as the upper limit for a reference voltage of 100V. For example, when the voltage value _i is greater than or equal to the upper limit value, the distribution command value calculation unit 204 determines the dischargeable amount _i as 0. Thus, when voltage value _i is equal to or higher than the upper limit value, threshold value _i is limited to 0, and the output of power storage device 303 is limited to 0.

  Next, in step S308, the distribution command value calculation unit 204 calculates a power storage device distribution command value to the power storage device 303 by the following equation (13) or the like. If the power storage device distribution command value calculated by equation (13) or the like exceeds the fourth threshold value calculated by equation (12), distribution command value calculation unit 204 sets the power storage device distribution command value to the first value. Limit with a threshold of 4. Expression (13) is an example, and an optimization method or the like may be applied.

  Next, in step S <b> 309, the distribution command value calculation unit 204 transmits the power storage device distribution command value to the power storage device 303 and transmits the load distribution command value to the load 302 via the customer facility control device 301. Thereby, the distribution command value calculation unit 204 notifies each distribution command value. This process is the same as in the first embodiment.

  The power control apparatus 200 in the present embodiment calculates a command value based on not only the remaining capacity but also the rated output capacity, the power consumption amount, and the voltage. Thereby, the power control apparatus 200 can suppress deterioration in control accuracy, voltage abnormality, and the like.

  Specific examples will be described below. As a premise of this specific example, the control period is 30 minutes, the control cycle is 10 minutes, and the target received power amount in the control period is 4 kWh. There is no controllable load 302a, and two power storage devices 303, the first power storage device 303 and the second power storage device 303, are controlled. The inverter rating of the first power storage device 303 is 60 kW, and the remaining capacity is 40 kWh. On the other hand, the inverter rating of the second power storage device 303 is 30 kW, and the remaining capacity is 20 kWh.

  Further, as a premise of this specific example, the control execution time is 10 minutes, and the power consumption amount of the load 302 corresponding to the first power storage device 303 in that 10 minutes is 1 kWh, which corresponds to the second power storage device 303. The power consumption of the load 302 is 2 kWh. Further, the output power amounts of the first power storage device 303 and the second power storage device 303 in the control execution time (10 minutes) are 0 kWh.

  Moreover, as a premise of this specific example, the solar power generation device 304 is provided in the customer facility 300 including the second power storage device 303. And in control implementation time (10 minutes), the electric power generation amount of the solar power generation device 304 corresponding to the 2nd electrical storage apparatus 303 is 1 kWh.

As a premise of this specific example, the voltage acquisition unit 206 acquires 105 V as the voltage value of the power receiving point corresponding to the first power storage device 303 and as the voltage value of the power receiving point corresponding to the second power storage device 303. 104V is acquired. The upper voltage limit is 107V. Therefore, in the formula (11), V ₁ = 2V and V ₂ = 3V are determined. As a premise, the sensitivity coefficient α in the equation (11) is α ₁₁ = 0.0001, α ₁₂ = 0.0001, α ₂₁ = 0.0001, α ₂₂ = 0.0002.

  Based on the above assumption, the inverter output possible amounts of the first power storage device 303 and the second power storage device 303 are calculated as 10 kWh and 5 kWh, respectively, from Expression (1). Further, the total sum of the actual received power amounts is calculated as 3 kWh from Equation (3). Moreover, the sum total of predicted received electric energy is calculated as 6 kWh from Formula (4). In addition, the predicted amount of generated power is calculated as 2 kWh when calculated in the same manner as in equation (4) (not limited to equation (4)).

  Therefore, the total control amount is calculated as 2 kWh with respect to 4 kWh, which is the target received power amount, from Equation (8).

  Next, with respect to the first power storage device 303, in Expression (9), the inverter output possible amount is 10 kWh, the power consumption amount is 1 kWh, the generated power amount is 0 kWh, and the dischargeable remaining capacity is 6.67 kWh (= 40 kWh × ( 10 minutes ÷ 1h) × discharge rate 1C). Therefore, from Equation (9), the third threshold value of the first power storage device 303 is calculated as 1 kWh.

  On the other hand, with respect to the second power storage device 303, in Expression (9), the inverter output possible amount is 5 kWh, the power consumption amount is 2 kWh, the generated power amount is 1 kWh, and the remaining capacity is 3.33 kWh (= 20 kWh × (10 minutes ÷ 1h). ) × discharge rate 1C). Therefore, from Equation (9), the third threshold value of the second power storage device 303 is calculated as 1 kWh.

Further, P ₁ = 1.667 kWh and P ₂ = 1.667 kWh are calculated from Equation (11). From Expression (12), the fourth threshold value in the first power storage device 303 is calculated as 1 kWh, and similarly, the fourth threshold value in the second power storage device 303 is calculated as 1 kWh.

  Next, from Equation (13), the power storage device distribution command value of the first power storage device 303 is calculated as 1 kWh, and the power storage device distribution command value of the second power storage device 303 is calculated as 1 kWh.

  Note that the power control apparatus 200 may determine the control cycle according to the voltage fluctuation. For example, when the fluctuation of the voltage value acquired by the voltage acquisition unit 206 is large, or when the voltage acquired by the voltage acquisition unit 206 is close to the upper limit value of the voltage, the power control device 200 shortens the control cycle. Also good. On the other hand, the power control apparatus 200 may extend the control cycle when the voltage acquired by the voltage acquisition unit 206 is close to the lower limit value of the voltage.

(Embodiment 4)
In this embodiment, a power control device that controls a plurality of power storage devices and controllable loads in a customer's facility will be described. In addition, about the component similar to Embodiment 1-3 already demonstrated, the same code | symbol may be attached | subjected and detailed description may be abbreviate | omitted.

  FIG. 11 is a block diagram showing the configuration of customer equipment in the present embodiment. As shown in FIG. 11, the customer facility 300 includes a load 302, a plurality of power storage devices 303, a customer facility control device 301, and a power control device 200.

  That is, in the first to third embodiments, each of the plurality of customer facilities 300 includes the power storage device 303, but in this embodiment, one customer facility 300 includes the plurality of power storage devices 303. In the present embodiment, the customer facility 300 includes the power control device 200. Although the arrangement of the components in the present embodiment is different from those in the first to third embodiments, the specific operation of each component is the same as in the first to third embodiments.

  For example, the customer facility control device 301 performs power control on the discharge power amount, the remaining capacity and the inverter rating received from the power storage device 303 and the power consumption amount of the load 302 acquired from a sensor or meter (none of which is shown). To device 200.

  The power control device 200 determines the power storage device distribution command value of the plurality of power storage devices 303 and the load distribution command value of the controllable load 302a from the received discharge power amount, remaining capacity, inverter rating, and power consumption amount. Is calculated and transmitted to the customer equipment control device 301.

  The customer facility control device 301 transmits the received power storage device distribution command value and load distribution command value to the plurality of power storage devices 303 and the controllable load 302a.

  In the present embodiment, a plurality of power storage devices 303 are associated with the same load 302. That is, the amount of power discharged from each power storage device 303 is limited by a threshold value based on the amount of power consumed by the same load 302. Therefore, the deterioration of the control accuracy is suppressed as compared with the case where the power consumption is not used for the threshold value.

  However, there is a possibility that the total discharge power amount exceeds the power consumption amount of the load 302. Therefore, the power consumption amount of the load 302 may be distributed to a plurality of power storage devices 303 and used as a threshold value. For example, the power consumption amount may be equally divided into a plurality of power storage devices 303 and used as a threshold value. Thereby, the deterioration of control accuracy is further suppressed.

(Embodiment 5)
In this embodiment, a power control device that controls a plurality of power storage devices and controllable loads in a customer's facility will be described. In addition, about the component similar to Embodiment 1-4 already demonstrated, the same code | symbol may be attached | subjected and detailed description may be abbreviate | omitted.

  FIG. 12 is a block diagram showing the configuration of customer equipment in the present embodiment. As shown in FIG. 12, the customer facility 300 includes a load 302, a plurality of power storage devices 303, and a power control device 200.

  The power control apparatus 200 serves as both the power control apparatus 200 and the customer facility control apparatus 301 shown in the fourth embodiment. For example, the power control device 200 acquires the amount of discharged power, the remaining capacity, and the inverter rating from the power storage device 303, and acquires the amount of power consumed by the load 302 from a sensor or meter (none of which is shown).

  Then, the power control device 200 determines the plurality of power storage device distribution command values for the plurality of power storage devices 303 and the load distribution command for the controllable load 302a from the acquired discharge power amount, remaining capacity, inverter rating, and power consumption amount. Calculate the value. Then, power control device 200 transmits the plurality of power storage device distribution command values and the load distribution command value to the plurality of power storage devices 303 and controllable load 302a.

  In the present embodiment, the power control device 200 plays the role of the customer facility control device 301, thereby reducing the number of devices in the customer facility 300. And a structure is simplified and an installation space is reduced.

(Summary and supplement)
The power control devices 200 shown in the plurality of embodiments described above control the amount of power output from each of the plurality of power storage devices 303 per predetermined time. The predetermined time is, for example, a control cycle. The predetermined time may be another period. For example, the power control apparatus 200 includes a power storage device information acquisition unit 201, a load information acquisition unit 202, a total control amount calculation unit 203, and a distribution command value calculation unit 204.

  The power storage device information acquisition unit 201 acquires the remaining capacity of the power storage device 303 and the rated output capacity per predetermined time of the power storage device 303 for each of the plurality of power storage devices 303.

  Here, the remaining capacity may be a remaining capacity that can be discharged per predetermined time. The rated output capacity is, for example, the inverter output possible amount shown in the plurality of embodiments.

  Further, the rated output capacity per predetermined time of the power storage device 303 may reflect the dischargeable capacity of the storage battery per predetermined time. That is, the dischargeable capacity calculated from the discharge rate of the storage battery and the predetermined time may be reflected in the remaining capacity or the rated output capacity.

  The load information acquisition unit 202 acquires the power consumption per predetermined time of one or more loads 302 corresponding to the power storage device 303 for each of the plurality of power storage devices 303. The one or more loads 302 corresponding to the power storage device 303 are one or more loads 302 that can use the power supplied from the power storage device 303 and the power system. For example, the one or more loads 302 corresponding to the power storage device 303 are one or more loads 302 installed in the same facility as the power storage device 303.

  The load information acquisition unit 202 may acquire the power consumption per predetermined time by calculating the power consumption per predetermined time from the power consumption of another unit time.

  Total control amount calculation unit 203 calculates a total control amount corresponding to the total power amount output from the plurality of power storage devices 303 according to a predetermined target power amount of power supplied from the power system. For example, the target power amount corresponds to the target power supply amount of the power system and corresponds to the target received power amount. Further, for example, the total control amount can be obtained by adding the sum of the predicted received power amount to the sum of the actual received power amount and subtracting the target received power amount. Further, for example, the total control amount may be a difference between the total predicted received power amount and the target received power amount.

  The sum total of the predicted received power amounts is calculated from the power consumption amounts acquired for each of the plurality of power storage devices 303. For example, the total sum of predicted received power amounts may be the total power consumption amount of all loads 302 corresponding to the plurality of power storage devices 303. The total control amount and the target received power amount may be a power amount corresponding to a predetermined time or may be a power amount corresponding to another time.

  The distribution command value calculation unit 204 distributes the total control amount to the plurality of power storage devices 303 by calculating the power storage device distribution command value indicating the distribution amount for the power storage devices 303 for each of the plurality of power storage devices 303. Here, the amount of distribution to the power storage device 303 is the amount of power distributed to the power storage device 303 out of the total control amount, and is the amount of power to be output to the power storage device 303.

  In addition, in the calculation of the power storage device distribution command value, the distribution command value calculation unit 204 calculates, for each of the plurality of power storage devices 303, the minimum value among the remaining capacity, the rated output capacity, and the power consumption amount as a threshold value. Then, distribution command value calculation unit 204 calculates a power storage device distribution command value indicating the amount of power that is equal to or less than the threshold value as the distribution amount.

  As a result, for each of the plurality of power storage devices 303, an appropriate value is determined based on not only the remaining capacity of the power storage device 303 but also the rated output capacity of the power storage device 303 and the power consumption of the load 302 corresponding to the power storage device 303. A command value is calculated. Each of the plurality of power storage devices 303 can perform discharge based on an appropriate command value. Therefore, the power control device 200 can appropriately control the amount of power output from each of the plurality of power storage devices 303.

  The total control amount and the power consumption amount used for calculating the power storage device distribution command value may be adjusted based on a change amount of the power consumption of the controllable load 302a. For example, one or more loads 302 corresponding to the power storage devices 303 included in the plurality of power storage devices 303 may include a controllable load 302a that is a load 302 that can reduce power consumption.

  In this case, the distribution command value calculation unit 204 may calculate a load distribution command value indicating the amount of change in power consumption of the controllable load 302a. Then, the distribution command value calculation unit 204 reflects the change amount in the acquired power consumption amount for the power storage device 303, and among the remaining capacity, the rated output capacity, and the power consumption amount in which the change amount is reflected. May be calculated as the threshold value. Further, the distribution command value calculation unit 204 may reflect the change amount in the total control amount, and distribute the control total amount in which the change amount is reflected to the plurality of power storage devices 303 according to a threshold value (a range defined by the threshold value).

  Thereby, the power consumption of one or more loads 302 is reduced, and an appropriate command value is calculated according to the reduced power consumption. For example, by controlling the power consumption of the controllable load 302a such as an air conditioner or a heat pump water heater, the amount of discharge and the number of uses of the power storage device 303 are reduced, and cycle deterioration of the power storage device 303 is suppressed.

  For example, the distribution command value calculation unit 204 may calculate a power storage device distribution command value that indicates a larger distribution amount as the threshold value is larger. Thereby, power control device 200 can calculate a power storage device distribution command value proportional to the threshold value. Therefore, power control device 200 can appropriately distribute the burden to a plurality of power storage devices 303.

  Further, for example, the distribution command value calculation unit 204 may calculate a power storage device distribution command value that reduces the dispersion of the remaining capacity of the plurality of power storage devices 303. Thereby, the power control device 200 can bring the remaining capacities of the plurality of power storage devices 303 close to their average. Therefore, the power control apparatus 200 can suppress overcharge and overdischarge.

  For example, the distribution command value calculation unit 204 may calculate a power storage device distribution command value indicating 0 as the distribution amount when the threshold value is smaller than the lower limit. Thereby, power control device 200 can suppress low-efficiency discharge and suppress deterioration of power storage device 303. In addition, the power control device 200 can reduce the amount of processing for controlling the power storage device 303.

  For example, the distribution command value calculation unit 204 may calculate a power storage device distribution command value indicating the distribution amount with a resolution equal to or higher than the minimum resolution of the discharge amount of the power storage device 303 for each of the plurality of power storage devices 303. Here, the minimum resolution of the discharge amount of the power storage device 303 is a minimum resolution predetermined for the power storage device 303 and corresponds to the gradation of the discharge amount of the power storage device 303.

  Thereby, power control device 200 can calculate an appropriate power storage device distribution command value. For example, the power control device 200 can improve control accuracy by allocating a fractional amount of power smaller than the minimum resolution to the other power storage devices 303.

  Further, for example, the power control device 200 may further include a solar power generation information acquisition unit 205 that acquires the power supply amount per predetermined time of the solar power generation device 304. Here, the solar power generation device 304 is a device that supplies power to one or more loads 302 corresponding to the power storage devices 303 included in the plurality of power storage devices 303.

  When the power supply amount of the solar power generation device 304 is smaller than the power consumption amount per predetermined time of the load 302 of 1 or more, the distribution command value calculation unit 204 supplies power from the power consumption amount for the power storage device 303. The amount may be excluded. That is, the distribution command value calculation unit 204 may exclude the power supply amount from the power consumption amount when calculating the threshold value for the power storage device 303. Then, the distribution command value calculation unit 204 may calculate the minimum value among the remaining capacity, the rated output capacity, and the power consumption amount excluding the power supply amount as a threshold value.

  Thereby, even when the solar power generation device 304 is installed, the power control device 200 can calculate an appropriate power storage device distribution command value according to the power supply amount of the solar power generation device 304.

  For example, the distribution command value calculation unit 204 calculates a power storage device distribution command value indicating 0 as the distribution amount of the power storage device 303 when the power supply amount per predetermined time of the solar power generation device 304 is larger than 0. May be. Thereby, even when the solar power generation device 304 is installed, the power control device 200 calculates an appropriate power storage device command value according to whether or not the solar power generation device 304 actually supplies power. Can do.

  In addition, for example, the power control apparatus 200 may further include a voltage acquisition unit 206 that acquires the voltage of the power receiving point corresponding to the power storage device 303 for each of the plurality of power storage devices 303. The power receiving point corresponding to the power storage device 303 is a power receiving point of power supplied from the power system to the facility 300 including the power storage device 303 and one or more loads 302. Then, distribution command value calculation unit 204 may calculate a power storage device distribution command value indicating 0 as the distribution amount when the voltage is equal to or higher than the upper limit voltage for each of the plurality of power storage devices 303.

  Thereby, when the voltage is equal to or higher than the upper limit voltage, power control device 200 can limit the output of power storage device 303 and suppress voltage abnormality.

  In addition, for example, the power control device 200 further acquires a plurality of voltages corresponding to the plurality of power storage devices 303 by acquiring a voltage at a power receiving point corresponding to the power storage device 303 for each of the plurality of power storage devices 303. The voltage acquisition unit 206 may be provided.

  Then, distribution command value calculation unit 204 may calculate the dischargeable amount for each of the plurality of power storage devices 303 from a plurality of voltages, an upper limit voltage for the plurality of voltages, and a predetermined relationship. When the dischargeable amount is smaller than the threshold value, the distribution command value calculation unit 204 changes the threshold value to the dischargeable amount, and calculates a power storage device distribution command value indicating the power amount equal to or less than the changed threshold value as the distribution amount. May be.

  The predetermined relationship is a relationship between a variation amount of each discharge of the plurality of power storage devices 303 and a variation amount of each of the plurality of voltages. For example, the sensitivity coefficient indicated in the above-described third embodiment, or Corresponds to a matrix of sensitivity coefficients.

  Thereby, power control device 200 can adjust the threshold value so that the voltage does not exceed the upper limit voltage, and calculate an appropriate power storage device distribution command value.

  For example, the load information acquisition unit 202 may predict the power consumption amount per predetermined time of one or more loads 302 corresponding to the power storage device 303 for each of the plurality of power storage devices 303. Then, the load information acquisition unit 202 may acquire the predicted power consumption as the power consumption per predetermined time for one or more loads 302.

  Thereby, the power control apparatus 200 can calculate an appropriate threshold according to the prediction of the power consumption. Therefore, power control device 200 can thereby calculate an appropriate power storage device distribution command value.

  For example, the distribution command value calculation unit 204 may notify each of the plurality of power storage devices 303 of the power storage device distribution command value calculated by the distribution command value calculation unit 204. Thereby, power control device 200 can appropriately notify each of the plurality of power storage devices 303 of the power storage device distribution command value.

  For example, the distribution command value calculation unit 204 may notify each of the plurality of power storage devices 303 of the power storage device distribution command value via the customer facility control device 301. For example, the distribution command value calculation unit 204 may notify the controllable load 302a of the load distribution command value calculated by the distribution command value calculation unit 204. Similar to the power storage device distribution command value, the distribution command value calculation unit 204 may notify the controllable load 302a of the load distribution command value via the customer facility control device 301.

  Although the power storage device 303 has been mainly described in the above embodiment, the power control device 200 can also control a generator that may not be able to reversely flow similarly to the power storage device 303. . Here, the generator is a fuel cell or a gas engine. For example, the power control apparatus 200 uses the expressions (1) to (4) and (7) as they are, and replaces the expressions (5) and (6) with the following expressions (14) and (15). Is used to calculate the distribution command value (hereinafter, the distribution command value to the generator may be referred to as the generator command value).

First threshold _i = min (inverter output possible amount _i , power consumption _i ) Equation (14)
Second threshold value _i = min (inverter output possible amount _i , power consumption amount _i + load distribution command value _i ) (15)

  In addition, Formula (14) and Formula (15) are formulas regarding the generator that performs interconnection by the inverter. When interconnection by an AC generator is performed, another formula is used. For example, the output possible amount of an AC generator may be used instead of the inverter output possible amount.

  In the above-described plurality of embodiments, each component may be configured by dedicated hardware or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. Here, the software that realizes the power control apparatus 200 and the like of the above embodiment is the following program.

  In other words, this program is a power control method for controlling the amount of power output per predetermined time from each of a plurality of power storage devices to a computer, and for each of the plurality of power storage devices, A power storage device information acquisition step of acquiring a remaining capacity and a rated output capacity per predetermined time of the power storage device, and using power supplied from the power storage device and a power system for each of the plurality of power storage devices A load information acquisition step of acquiring the power consumption amount per predetermined time of one or more possible loads, and a total output output from the plurality of power storage devices according to a predetermined target power amount for the power supplied from the power system A total control amount calculating step for calculating a total control amount corresponding to the amount of electric power, and the control for each of the plurality of power storage devices The control total amount is distributed to the plurality of power storage devices by calculating a power storage device allocation command value indicating a distribution amount that is a power amount distributed to the power storage device and is output to the power storage device. A distribution command value calculation step, wherein the distribution command value calculation step calculates, as a threshold value, a minimum value among the remaining capacity, the rated output capacity, and the power consumption amount for each of the plurality of power storage devices. Then, a power control method for calculating the power storage device distribution command value indicating the amount of power equal to or less than the threshold as the distribution amount is executed.

  Each component of the power control apparatus 200 may be a circuit. These circuits may constitute one circuit as a whole, or may be separate circuits. Each of these circuits may be a general-purpose circuit or a dedicated circuit.

  As mentioned above, although the power control apparatus 200 etc. which concern on the one or some aspect were demonstrated based on embodiment, this indication is not limited to this embodiment. Unless it deviates from the gist of the present disclosure, various modifications conceived by those skilled in the art have been made in this embodiment, and forms constructed by combining components in different embodiments are also within the scope of one or more aspects. May be included.

  For example, in the above-described embodiment, a process executed by a specific component may be executed by another component instead of the specific component. Further, the order of the plurality of processes may be changed, and the plurality of processes may be executed in parallel.

  The present disclosure can be used for, for example, a power control device that provides a negative watt service by controlling a plurality of power storage devices, and includes a power control system, a customer facility control system, a power storage device management system, or a load. It can be applied to management systems.

DESCRIPTION OF SYMBOLS 101 Distribution transformer 102 Distribution line 103 Communication line 200 Power control apparatus 201 Power storage apparatus information acquisition part 202 Load information acquisition part 203 Control total amount calculation part 204 Distribution command value calculation part 205 Solar power generation information acquisition part 206 Voltage acquisition part 300 Demand House facilities (equipment)
301 Customer Facility Control Device 302 Load 302a Controllable Load 302b Uncontrollable Load 303 Power Storage Device 304 Solar Power Generation Device (Power Generation Device)

Also, power and amount of power may refer to those values.

Claims (13)

A power control method for controlling the amount of power output per predetermined time from each of a plurality of power storage devices,
For each of the plurality of power storage devices, a remaining capacity of the power storage device and a power storage device information acquisition step of acquiring the rated output capacity per predetermined time of the power storage device;
For each of the plurality of power storage devices, a load information acquisition step of acquiring power consumption per predetermined time of one or more loads that can use power supplied from the power storage device and the power system;
A total control amount calculating step for calculating a total control amount corresponding to the total power amount output from the plurality of power storage devices according to a predetermined target power amount for the power supplied from the power system;
For each of the plurality of power storage devices, by calculating a power storage device distribution command value indicating a distribution amount that is the amount of power distributed to the power storage device in the total control amount and output to the power storage device, A distribution command value calculation step of distributing the total control amount to the plurality of power storage devices,
In the distribution command value calculation step, for each of the plurality of power storage devices,
Calculate the minimum value of the remaining capacity, the rated output capacity and the power consumption as a threshold,
A power control method for calculating the power storage device distribution command value indicating the amount of power equal to or less than the threshold as the distribution amount. In the distribution command value calculation step, control is a load capable of changing power consumption to the one or more loads that can use power supplied from power storage devices included in the plurality of power storage devices and the power system. If possible load is included,
Calculate a load distribution command value indicating the amount of change in power consumption of the controllable load,
For the power storage device, the change amount is reflected in the power consumption amount, and the minimum value among the remaining capacity, the rated output capacity, and the power consumption amount in which the change amount is reflected is calculated as the threshold value. And
The power control method according to claim 1, wherein the change amount is reflected in the control total amount, and the control total amount in which the change amount is reflected is distributed to the plurality of power storage devices according to the threshold value. The power control method according to claim 1, wherein, in the distribution command value calculation step, the power storage device distribution command value indicating the distribution amount that is larger as the threshold value is larger is calculated. The power control method according to claim 1, wherein, in the distribution command value calculation step, the power storage device distribution command value that reduces a dispersion of remaining capacity of the plurality of power storage devices is calculated. The power control method according to claim 1 or 2, wherein, in the distribution command value calculation step, when the threshold value is smaller than a lower limit, the power storage device distribution command value indicating 0 as the distribution amount is calculated. 6. The power storage device distribution command value indicating the distribution amount is calculated with a resolution equal to or higher than a minimum resolution of a discharge amount of the power storage device for each of the plurality of power storage devices in the distribution command value calculation step. The power control method according to any one of claims. The power control method further includes the predetermined time of the solar power generation device that supplies power to the one or more loads that can use power supplied from the power storage devices included in the plurality of power storage devices and the power system. Including a photovoltaic power generation information acquisition step for acquiring the power supply amount per unit,
In the distribution command value calculation step, when the power supply amount is smaller than the power consumption amount per predetermined time of the one or more loads,
For the power storage device, the power supply amount is excluded from the power consumption amount, and the minimum value among the remaining capacity, the rated output capacity, and the power consumption amount from which the power supply amount is excluded is the threshold value. The power control method according to any one of claims 1 to 6. The power control method further includes the predetermined time of the solar power generation device that supplies power to the one or more loads that can use power supplied from the power storage devices included in the plurality of power storage devices and the power system. Including a photovoltaic power generation information acquisition step for acquiring the power supply amount per unit,
The power distribution device distribution command value indicating 0 as the distribution amount of the power storage device is calculated when the power supply amount is greater than 0 in the distribution command value calculation step. The power control method described. The power control method further includes, for each of the plurality of power storage devices, a voltage acquisition step of acquiring a voltage at a power receiving point of power supplied from the power system to a facility including the power storage device and the one or more loads. Including
The distribution command value calculation step calculates, for each of the plurality of power storage devices, the power storage device distribution command value indicating 0 as the distribution amount when the voltage is equal to or higher than an upper limit voltage. The power control method according to claim 1. The power control method further acquires, for each of the plurality of power storage devices, a voltage at a power reception point of power supplied from the power system to a facility including the power storage device and the one or more loads. Including a voltage acquisition step of acquiring a plurality of voltages corresponding to the plurality of power storage devices,
In the distribution command value calculation step, for each of the plurality of power storage devices,
The dischargeable amount is determined from a predetermined relationship between the plurality of voltages, the upper limit voltage for the plurality of voltages, and the variation amount of each of the plurality of power storage devices and the variation amount of each of the plurality of voltages. Calculate
When the dischargeable amount is smaller than the threshold value, the threshold value is changed to the dischargeable amount, and the power storage device distribution command value indicating the amount of power less than the changed threshold value as the distribution amount is calculated. The power control method according to any one of 1 to 8. In the load information acquisition step, for each of the plurality of power storage devices, a power consumption amount per predetermined time of the one or more loads is predicted, and the predicted power consumption amount is calculated as the predetermined power of the one or more loads. The power control method according to claim 1, wherein the power control method is acquired as a power consumption amount per hour. The power control method further includes a notification step of notifying each of the plurality of power storage devices of the power storage device distribution command value calculated in the distribution command value calculation step. The power control method according to Item 1. A power control device for controlling the amount of power output per predetermined time from each of a plurality of power storage devices,
For each of the plurality of power storage devices, a remaining capacity of the power storage device, and a power storage device information acquisition unit that acquires the rated output capacity per predetermined time of the power storage device;
For each of the plurality of power storage devices, a load information acquisition unit that acquires the power consumption per predetermined time of one or more loads that can use power supplied from the power storage device and the power system;
A total control amount calculation unit for calculating a total control amount corresponding to the total power amount output from the plurality of power storage devices according to a predetermined target power amount for the power supplied from the power system;
For each of the plurality of power storage devices, by calculating a power storage device distribution command value indicating a distribution amount that is the amount of power distributed to the power storage device in the total control amount and output to the power storage device, A distribution command value calculation unit that distributes the total control amount to the plurality of power storage devices,
The distribution command value calculation unit is configured for each of the plurality of power storage devices.
Calculate the minimum value of the remaining capacity, the rated output capacity and the power consumption as a threshold,
The power control device that calculates the power storage device distribution command value indicating the amount of power that is equal to or less than the threshold as the distribution amount.

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