JP2018023220A - Power management system - Google Patents

Abstract

An object of the present invention is to suppress a difference between power supplied from a distribution system and power consumption used by a consumer. A power management system according to an embodiment includes a first consumer group indicating a consumer group provided with a storage battery included in a total consumer group that consumes power supplied from a distribution system. A power management system that adjusts demand for power by controlling a storage battery includes a calculation unit and a transmission unit. The calculation unit calculates the difference between the supply power procured from the power distribution system in a unit time in which power is bought and sold and the total demand prediction power amount that is predicted to be consumed by the total consumer group in the unit time. The charge / discharge command value for the first consumer group is calculated for each divided time obtained by dividing the unit time by a predetermined number. A transmission part transmits the command value of charging / discharging with respect to a 1st consumer group. [Selection] Figure 3

Description

  Embodiments described herein relate generally to a power management system.

  In the conventional power system, the electric power according to the demand was obtained by adjusting the power generation amount. For example, when a change occurs in demand, the power generation amount is controlled following the change. For this reason, a loss due to a difference in balance between supply and demand, and a loss due to inability to adjust the demand itself have occurred. In addition, there is a problem that efficient control cannot be performed between supply and demand.

  In contrast, in recent years, a technology called smart grid has been proposed. The concept of this technology enables efficient control between supply and demand, which was difficult to achieve with conventional central control, by connecting the power generation equipment to the terminal power equipment via a network. can do.

  Furthermore, it has been proposed to prepare a huge stationary power storage system in order to use surplus power generated in a time zone in which supply exceeds demand in a time zone in which demand exceeds supply.

JP 2015-14935 A

  However, in the prior art, when a huge stationary power storage system is prepared, a site for installing the power storage system is required. For this reason, it is preferable to arrange a storage battery at a household level for each consumer and achieve the same amount control at the same time as the stationary power storage system by charging and discharging the storage battery.

  The power management system of the embodiment controls the storage battery of the first consumer group that is included in the total consumer group that consumes the power supplied from the distribution system and that shows the consumer group provided with the storage battery. Thus, a power management system that performs power demand adjustment includes a calculation unit and a transmission unit. The calculation unit calculates the difference between the supply power procured from the power distribution system in a unit time in which power is bought and sold and the total demand prediction power amount that is predicted to be consumed by the total consumer group in the unit time. The charge / discharge command value for the first consumer group is calculated for each divided time obtained by dividing the unit time by a predetermined number. A transmission part transmits the command value of charging / discharging with respect to a 1st consumer group.

FIG. 1 is a diagram illustrating a configuration example of a power supply and demand management system according to the first embodiment. FIG. 2 is a diagram illustrating a configuration of a first consumer according to the first embodiment. FIG. 3 is a diagram illustrating the configuration of the supply and demand management server according to the first embodiment. FIG. 4 is a diagram illustrating the amount of power for each time period supplied to the consumer group from the power generation system of the first embodiment. FIG. 5 is a diagram illustrating a short-term prediction result of power usage acquired by the demand prediction processing unit according to the first embodiment based on the demand prediction information storage unit and the power storage information storage unit for each consumer. . FIG. 6 is a diagram illustrating the difference between the amount of power actually used by the consumer group of the first embodiment and the amount of power supplied from the power generation system. FIG. 7 is a diagram for explaining the power demand management method according to the first embodiment. FIG. 8 is a diagram illustrating the timing of the charge / discharge instruction according to the first embodiment. FIG. 9 is a diagram illustrating the timing of the charge / discharge instruction according to the first modification. FIG. 10 is a diagram illustrating the timing of the charge / discharge instruction according to the second modification. FIG. 11 is a diagram illustrating a notification message including measurement data that each of the consumer group of the first embodiment transmits to the supply and demand management server. FIG. 12 is a sequence diagram illustrating communication performed between the supply and demand management server of the first embodiment and the first consumer that includes the storage battery. FIG. 13 is a diagram exemplifying the division imbalance allocated when the calculation unit of the modification 4 performs the charge / discharge instruction. FIG. 14 is a diagram illustrating a configuration of a supply and demand management server according to the second embodiment. FIG. 15 is a diagram illustrating a customer management table stored in the group data storage unit according to the second embodiment. FIG. 16 is a diagram illustrating a predicted power amount calculation technique management table stored in the group data storage unit of the second embodiment. FIG. 17 is a sequence diagram illustrating communication performed between the supply and demand management server according to the second embodiment and a plurality of consumers including a storage battery.

  Although this embodiment demonstrates the example which applied the power management system to the power supply-and-demand management system, you may use for another system etc.

(First embodiment)
FIG. 1 is a diagram illustrating a configuration example of a power supply and demand management system according to the first embodiment. In the example shown in FIG. 1, the entire power system at the time of power liberalization is shown.

  As shown in FIG. 1, the power supply and demand management system includes a supply and demand management server 100, a meter management server 103, a power generation system 104, a customer group 101 provided with a storage battery, and a customer group 102 provided with no storage battery. And.

  The power supply and demand management system of the present embodiment controls the storage battery 121 of the consumer group 101 included in the total consumer group that consumes the power supplied from the distribution system including the power generation system 104, thereby Adjust demand.

  As shown in FIG. 1, power is supplied from the power generation system 104 to the customer groups 101 and 102 via the power system network 152. In the present embodiment, the smart meters 111 and 112 are disposed at all consumers. For this reason, a consumer's power consumption can be measured irrespective of whether the storage battery was provided.

  The power consumption of the consumer group 102 without a storage battery is for each smart meter 112_1, 112_2,..., 112_m (hereinafter referred to as a smart meter 112) provided for each consumer 102_1, 102_2,. It is measured.

  The power consumption of the consumer group 101 provided with a storage battery is measured for each smart meter 111_1, 111_2, 111_3,..., 111_n (hereinafter referred to as the smart meter 111) provided in each of the consumer group 101. Yes.

  The power measured by the smart meter 112 and the smart meter 111 is notified to the meter management server 103 of the power distribution company via the AMI network (smart meter network) 153 every 30 minutes.

  A general power retailer can acquire data of the smart meters 111 and 112 measured every 30 minutes from the power distribution company via the network 154 between the power system companies. In this embodiment, data collected by the meter management server 103 of the power distribution company is transmitted to the supply / demand management server 100 of the retailer via the network 154 between the power system companies.

  By the way, according to the current rules, 30 minutes are required to obtain the latest data. Considering the notification every 30 minutes from the smart meters 111 and 112, it is possible to obtain up to 60 minutes of measurement data.

  Furthermore, the consumer group 101 is provided for each of the first consumer 101_1, the second consumer 101_2, the third consumer 101_3,..., The nth consumer 101_n (n is a natural number). For each of the storage batteries 121_1, 121_2, 121_3,. Notification to the person's supply and demand management server 100.

  That is, in the consumer group 101 that owns the storage battery 121, measurement / notification by the smart meter 111 is performed in the same manner as the consumer group 102, and at the same time, the charging / discharging status of the storage battery 121 and the consumer via the public network 151. Are periodically notified to the supply / demand management server 100 of the retailer. In the present embodiment, the notification period is set to 5 minutes as an example, but is not limited to 5 minutes, and an appropriate period is set according to the embodiment.

  In accordance with this, the supply and demand management server 100 of the power retailer provides details of the measurement data in units of 30 minutes from the meter management server 103 of the power distribution company and details in units of 5 minutes regarding the storage battery 121 of the consumer group 101 via the public network 151. Receive accurate measurement data.

  The power retailer's supply and demand management server 100 also procures power to be supplied to the consumer with the power generation company having the power generation system 104 via the network 154 between power system companies. Communication.

  Then, the supply and demand management server 100 of the present embodiment performs processing based on measurement in units of 30 minutes by the smart meters 111 and 112 and detailed measurement data in units of 5 minutes from the customer group 101 equipped with storage batteries. It can be performed.

  As an example of processing, the electricity retailer's supply and demand management server 100 is used by the consumer groups 101 and 102 based on the amount of power supplied from the power generation system 104 and the received measurement data and detailed information on the storage battery 121. Based on the prediction of the amount of electric power to be performed, simultaneous charge control is realized by performing charge / discharge control of the storage battery 121 of the consumer group 101.

  FIG. 2 is a diagram illustrating the configuration of the first consumer 101_1. As shown in FIG. 2, a load 204 and a storage battery system 200 are connected via a distribution line 201. The first customer 101_1 is, for example, equipment installed in a home or company site. In the example illustrated in FIG. 2, the configuration of the first consumer 101_1 will be described. However, the second customer 101_2,...

  The first customer 101_1 of the present embodiment is supplied with power from the power generation system 104 via the power system network 152. The power output from the power generation system 104 is supplied to the storage battery system 200 and the load 204 via the distribution line 201.

  The smart meter 111_1 measures the power supplied from the power generation system 104. Furthermore, the smart meter 111_1 measures the electric power used in the first consumer 101_1, and grasps the state of electricity usage in the first consumer 101_1 through HEMS (Home Energy Management System) or the like. Then, the smart meter 111_1 uses the power measurement result of the first consumer 101_1 as measurement data (including the power usage state) via the AMI network (smart meter network) 153, and the meter management server of the power distribution company 103 is notified every 30 minutes.

  The load 204 may be any device that consumes electric power, such as a home appliance provided in a home or company site.

  The power sensor 202 measures the power between the storage battery 121_1 and the load 204. The power sensor 202 outputs the power measurement result to the control unit 211.

  The storage battery system 200 includes a control unit 211, a storage battery 121_1, a PCS 213, and a communication unit 212.

  The PCS 213 performs control to mutually convert DC power of the storage battery 121_1 and AC power flowing through the distribution line 201.

  The electric power discharged from the storage battery 121_1 is converted into AC power by the PCS 213, and then supplied to the load 204 and the like.

  The communication unit 212 transmits and receives information to and from other communication devices connected via the public network 151. For example, the communication unit 212 transmits detailed measurement data related to the storage battery system 200 to the supply and demand management server 100 every 5 minutes. The detailed measurement data is information necessary for charging and discharging the storage battery 121_1, and in addition to the information including the SOC of the storage battery 121_1, the storage battery 121_1 measured by the power sensor 202 and the smart meter 111_1, Power consumption information indicating power consumption by the load 204 is included.

  The control unit 211 controls the entire storage battery system 200. For example, the control unit 211 controls charging / discharging of the storage battery 121_1 based on the charge / discharge control instruction (charge / discharge plan) received by the communication unit 212 from the supply and demand management server 100.

  The control unit 211 can communicate with the supply and demand management server 100 via the communication unit 212. Thereby, the control part 211 can operate | move by the instruction | indication of the demand-and-supply management server 100, for example.

  When the storage battery 121_1 is charged, the smart meter 111_1 uses the amount of power consumed by the load 204 in the first consumer 101_1 to the amount of power consumed by the storage battery 121_1 as the first consumer. Measured as the power consumption used in 101_1. Then, the smart meter 111_1 transmits the measurement result to the meter management server 103.

  The control unit 211 also performs control to suppress reverse power flow from the customer, which is a general power system rule. The reverse power flow means that power flows from the consumer to the grid side, and occurs when the power discharged from the storage battery 121_1 is larger than the power consumption of the load 204 in the consumer. Reverse power flow power is also measured by the smart meter 111_1. For this reason, electric power can be sold at an amount corresponding to the amount of generated reverse power flow, but reverse power flow using power from the storage battery is normally prohibited.

  Therefore, in the present embodiment, an example in which the reverse power flow due to the power from the storage battery is limited will be described. If it is assumed that the storage battery is under the control of the provider supplying the power, rather, the solar power and wind power that are always unstable due to the weather are temporarily stored in the storage battery to stabilize the entire system. It is thought that stable system operation is possible by discharging at the appropriate timing and making it reverse flow. In other words, in this embodiment, a case where there is a restriction on reverse power flow will be described, but it is assumed that charging and discharging of a storage battery can be performed effectively even in an environment where there is no restriction on reverse power flow.

  Next, the supply and demand management server 100 will be described. FIG. 3 is a diagram illustrating the configuration of the supply and demand management server 100 of the present embodiment. As shown in FIG. 3, the supply and demand management server 100 includes a main processing unit 301, a meter information storage unit 302, a consumer-specific storage information storage unit 303, a communication I / F 304, a demand prediction processing unit 305, A demand prediction information storage unit 306.

  The communication I / F 304 is a communication I / F for connecting to the public network 151.

  The demand prediction information storage unit 306 stores information such as weather, temperature, season, and the like necessary for predicting electric power used by a consumer. The information is acquired from a server or the like that provides the weather or the like, but may be acquired in any manner.

  The meter information storage unit 302 stores measurement data obtained by the smart meters 111 and 112 provided in the consumers of the customer groups 101 and 102, respectively.

  The meter information storage unit 302 of the present embodiment stores measurement data (for example, including power measurement values) collected in 30 minutes from the smart meters 111 and 112. The stored measurement data is obtained from the meter management server 103 via the power system operator network 154, but is collected from the meter management server 103 or the smart meters 111 and 112 and distributed to the retailer. A delay occurs. For this reason, the meter information storage unit 302 becomes data 60 minutes before even the latest data.

  The power storage information storage unit 303 for each consumer stores detailed measurement data related to the storage battery system 200 and power consumption provided in each consumer group 101. The measurement data includes, for example, information indicating the SOC (charge capacity) of the storage battery 121 and the power consumption. The power storage information storage unit 303 for each consumer is updated at every interval received by a reception processing unit 311 (described later). In the present embodiment, the reception processing unit 311 receives and updates every consumer every 5 minutes, but the reception interval is not limited.

  The power demand data includes a value obtained by adding the amount of power charged / discharged by the storage battery 121 to the amount of power consumed by the consumer at the load 204. In the present embodiment, since the charge capacity of the storage battery 121 is determined, the charge amount can be specified from the received SOC. Furthermore, the increase / decrease in the charge amount can be specified from the difference from the previous charge amount.

  The main processing unit 301 includes a reception processing unit 311, a transmission processing unit 312, and a calculation unit 313, and performs processing for the entire supply and demand management server 100. The main processing unit 301 performs basic processing for supply and demand management.

  The reception processing unit 311 receives various pieces of information from communication devices connected via the public network 151 and the power system provider network 154. For example, the reception processing unit 311 receives measurement data from the meter management server 103 by the smart meters 111 and 112 provided for each consumer of the consumer groups 101 and 102. Then, the reception processing unit 311 stores the received measurement data in the meter information storage unit 302.

  As another example, the reception processing unit 311 is configured such that the storage battery system 200 or the amount of power consumption provided in each consumer group 101 that consumes power supplied from the power generation system 104 (power supply system). Receive detailed measurement data about.

  The demand prediction processing unit 305 refers to the demand prediction information storage unit 306, and each consumer of the consumer groups 101 and 102 that consumes power supplied from the power generation system 104 (power supply system) The amount of power that is expected to be consumed every unit time (hereinafter referred to as management time) in which trading is performed is estimated. Further, the demand prediction processing unit 305 estimates the total demand prediction power amount of all consumers.

  In the present embodiment, any method may be used as a method for estimating the amount of power predicted by the demand prediction processing unit 305. For example, the amount of power used for each consumer is determined using various parameters such as SOC. The power prediction information may be calculated by simulating. In addition, the forecast may be calculated from environmental information such as the demand actual value of the customer and the temperature that fluctuate from time to time, from the long-term forecast to the short-term forecast one hour ahead, and the latest forecast value may always be calculated. .

  As a result, the demand prediction processing unit 305 performs the demand prediction of the amount of power used by each of all the consumers, and the total demand predicted power amount indicating the amount of power used by all the customer groups 101 and 102. Guess.

  The calculation unit 313 makes a charge / discharge plan for the storage battery 121 arranged in each of the consumer group 101 based on the prediction information of the electric energy estimated by the demand prediction processing unit 305, and charges / discharges the storage battery 121 according to the plan. Direct control. The instruction is transmitted by the transmission processing unit 312 via the communication I / F 304.

  The calculation unit 313 includes, for each management time, the supply power amount procured from the power generation system 104 in advance, the total demand prediction power amount consumed by the total consumer group during the management time predicted by the demand prediction processing unit 305, Compare And the calculation part 313 cancels the imbalance which is the difference electric power of supply electric energy and total demand electric power according to a comparison result, and in other words, a consumer group so that it may become simultaneous same amount control. Charge / discharge control of the storage battery 121 provided in 101 is performed.

  The calculation unit 313 of the present embodiment uses the supply power procured from the distribution system during management time and the total demand predicted power amount that is predicted to be consumed by the total consumer group (customer groups 101 and 102) during management time. Based on the imbalance, the charge / discharge command value for the customer group 101 provided with the storage battery 121 is calculated for each divided time obtained by dividing the management time by “6”. In addition, although this embodiment demonstrates the example which divides | segments management time by '6' so that 5 minutes which is a time interval with which prediction data is transmitted may be explained, it is not limited to '6'. What is necessary is just to divide | segment management time by an appropriate number (predetermined number) according to an aspect.

  The calculation part 313 calculates the discharge command value for discharging from each storage battery of the consumer group 101 when it is predicted that the total demand predicted power amount exceeds the supplied power amount. Moreover, the calculation part 313 calculates the charge command value for charging to each storage battery of the consumer group 101, when it is estimated that total demand prediction electric energy is less than supply electric energy.

  FIG. 4 is a diagram illustrating the amount of power for each time period (A to E) supplied from the power generation system 104 to the consumer groups 101 and 102. In the example shown in FIG. 4, the amount of power 501 procured from the power generation company one day ago is shown as the amount of power supplied from the power generation system 104 to the consumer groups 101 and 102. The procured power amount 501 is calculated and purchased based on the predicted value of the total demand amount of the customer groups 101 and 102 to which power is supplied from the power generation system 104.

  However, the consumer groups 101 and 102 do not always use power as long-term prediction.

  FIG. 5 is a diagram illustrating a short-term prediction result of the power usage amount acquired by the demand prediction processing unit 305 based on the demand prediction information storage unit 306 and the consumer-specific power storage information storage unit 303. In the example shown in FIG. 5, the dotted line indicates the power amount 501 for each time zone (A to E) procured as shown in FIG. 4. As a result of taking into consideration the latest temperature, the change in the latest demand record, and the like, the shift in the electric energy occurs because the short-term prediction is more accurate than the long-term prediction.

  And the surplus electric energy which has arisen when the electric energy 601 is less than the procured electric energy as a result of short-term prediction is shown. The amount of electric power 602 indicates the amount of insufficient electric power that is generated when the amount of electric power that has been procured is exceeded as a result of the short-term prediction.

  By the way, although it depends on the method of operation, it is possible to make adjustments in the short-term market by procuring additional power shortly by making a short-term forecast one hour ago and selling surplus power to others. . The short-term market is scheduled to start operation as a new system for electricity liberalization, and will become a price market according to supply and demand. Usually, the most recent trade is disadvantageous in price compared to planned trade, but if these measures are not taken, the current rules will confiscate surplus power at no charge and shortage will be charged as penalty power at a later date. It will be. For this reason, efficient adjustment is required, including adjustment in the short-term market.

  On the other hand, the supply and demand management server 100 according to the present embodiment performs control to charge surplus power generated as a result of the short-term prediction to the storage battery 121 provided in the customer group 101, and the insufficient power generated as a result of the short-term prediction. Is controlled to be discharged from the storage battery 121 provided in the consumer group 101.

  As a result, the same amount can be achieved by performing charge / discharge control of the storage battery 121 provided in the customer group 101 without using a short-term market and without providing a huge stationary power storage system.

  Furthermore, when using the electric power discharged from the storage battery 121 provided in the consumer group 101, unlike the stationary power storage system, supplying the electric power to other consumers is related to noise or the like. Is not preferable.

  Therefore, the supply and demand management server 100 of the present embodiment adjusts the power discharged from the storage battery 121 in consideration of the amount of power expected to be consumed by the consumer.

  FIG. 6 is a diagram showing a difference between the amount of power actually used by the customer groups 101 and 102 and the amount of power supplied from the power generation system 104. In the example shown in FIG. 6, a thick line 703 indicates the amount of power actually used for each time zone (A to E). And the surplus electric energy 701 further generated from the short-term prediction shown in FIG. 5 and the insufficient electric energy 702 further generated from the short-term prediction are shown. Similarly, the surplus power amount 701 and the shortage power amount 702 are also adjusted by charge / discharge control of the storage battery 121 by the supply and demand management server 100.

  Thus, in the present embodiment, the amount of power to be discharged and the amount of power to be charged are imbalance (difference power amount) that is the difference between the total demand predicted power amount and the supplied power amount.

  The calculation unit 313 of this embodiment distributes the imbalance to the storage batteries 121 arranged in a distributed manner in the customer group 101 and performs charge / discharge control.

  By the way, when the demand-and-supply management server 100 issues a charge / discharge instruction to each storage battery 121, for example, a demand with less storage capacity is instructed to a customer having a storage battery 121 with a small free capacity or a charge with less power consumption. When charging is instructed to the house, there is a case where discharging corresponding to the amount of power instructed to charge cannot be performed. For example, even if the storage battery 121 of a consumer with low power consumption is charged, if it is not consumed by the consumer, it cannot be consumed by another consumer due to the reverse power flow.

  As a result, when the storage battery 121 of a consumer with a large amount of power consumption is not charged, if the discharge amount corresponding to the discharge instruction cannot be discharged, the discharge instruction is not reached, and the imbalance is deviated.

  Similarly, even when an amount of electric power larger than the instructed charge / discharge amount can be charged / discharged, useless electric power is accumulated, which causes a deviation in cancellation of imbalance.

  Therefore, in the present embodiment, charge / discharge control is performed based on the power consumption of the customer group 101 provided with the storage battery 121 and the state (SOC) of the storage battery 121.

  Even if the charge / discharge control is performed, the remaining imbalance (difference power amount) is wasted procurement power if it becomes surplus, and is settled as adjusted power amount at a later date if it becomes insufficient. This increases the cost of power retailers.

  The imbalance is evaluated in a management time unit (30 minutes in Japan), which is a unit time for buying and selling power. For this reason, it is preferable that the difference between the total demand predicted power amount and the supplied power amount is zero in management time units. Therefore, in this embodiment, charge / discharge control is performed for each divided time obtained by dividing the management time by “6” (predetermined number).

  FIG. 7 is a diagram for explaining the power demand management method of the present embodiment. As illustrated in FIG. 7, the calculation unit 313 divides an imbalance I (difference electric energy) obtained by subtracting the total demand predicted electric energy from the supplied electric energy by “6” to obtain a first divided imbalance i1. ˜Sixth division imbalance i6 is calculated.

  And the calculation part 313 carries out the division imbalance (1st division imbalance i1-6th division imbalance i6) corresponding to the said division | segmentation time for every division | segmentation time. The first consumer 101_1 to the nth consumer 101_n) are assigned to perform charge / discharge instructions. In this embodiment, the imbalance that occurs in the management time (30 minutes) is controlled by six charge / discharge instructions.

  In the present embodiment, an example will be described in which the amount of imbalanced power is evenly divided every five minutes. For example, when the imbalanced power amount predicted within the management time (30 minutes) is 600 kWh surplus, the storage battery 121 is charged with a power amount of 100 kWh each time. Furthermore, the control part 211 allocates the electric energy of 100 kWh to the consumer group 101 (1st consumer 101_1-nth consumer 101_n). At that time, the allocation to the consumer is performed based on the demand record of each consumer, the demand forecast, the state of charge (SOC) of the storage battery, and the like. This makes it possible to realize charge control with no waste.

  FIG. 8 is a diagram illustrating the timing of the charge / discharge instruction according to the present embodiment. In the present embodiment, as shown in FIG. 8, an example in which a charge / discharge instruction is given every divided time (5 minutes) obtained by dividing the management time (30 minutes) equally by 6 is used. That is, the first charge / discharge instruction 801 is performed at 0 minutes, the second charge / discharge instruction 802 is performed at 5 minutes, the third charge / discharge instruction 803 is performed at 10 minutes, and the fourth charge / discharge instruction is performed at 15 minutes. A charge / discharge instruction 804 is performed, a fifth charge / discharge instruction 805 is performed in 20 minutes, and a sixth charge / discharge instruction 806 is performed in 25 minutes.

  Further, the present embodiment is not limited to the method of dividing the management time (30 minutes) equally by 6 (predetermined number). For example, the number of charge / discharge instructions is increased in the first half of the management time. Also good.

  FIG. 9 is a diagram illustrating the timing of the charge / discharge instruction according to the first modification. In the first modification, as shown in FIG. 9, the management time (30 minutes) is an example in which a charge / discharge instruction is increased in the first half. That is, the first charge / discharge instruction 901 is performed at 0 minutes, the second charge / discharge instruction 902 is performed at 3 minutes, the third charge / discharge instruction 903 is performed at 6 minutes, and the fourth charge is performed at 11 minutes. A charge / discharge instruction 904 is performed, a fifth charge / discharge instruction 905 is performed at 18 minutes, and a sixth charge / discharge instruction 906 is performed at 29 minutes. In this way, the time divided so that the interval becomes longer as time elapses within the management time may be set as the division time.

  As another example, the number of charge / discharge instructions may be increased in the second half of the management time. FIG. 10 is a diagram illustrating the timing of charge / discharge instructions according to the second modification. In the second modification, as shown in FIG. 10, the management time (30 minutes) is an example in which the charge / discharge instruction is increased in the latter half. That is, the first charge / discharge instruction 1001 is performed at 0 minutes, the second charge / discharge instruction 1002 is performed at 10 minutes, the third charge / discharge instruction 1003 is performed at 17 minutes, and the fourth charge is performed at 22 minutes. A charge / discharge instruction 1004 is performed, a fifth charge / discharge instruction 1005 is performed at 26 minutes, and a sixth charge / discharge instruction 1006 is performed at 29 minutes. In this way, the time divided so that the interval becomes shorter as time passes within the management time may be set as the divided time.

  Further, the timing for giving the instruction may be changed depending on whether the imbalance is charging or discharging. In general, considering that the cost of an imbalance is insufficient rather than surplus, the charge instruction when the imbalance is excessive is performed at the timing concentrated in the second half, and the discharge instruction when the imbalance is insufficient is It can be implemented at the timing concentrated in the first half. Thereby, charging / discharging control is performed so that a shortage of electric power due to imbalance is suppressed.

  Returning to the first embodiment, the calculation unit 313 divides the imbalance I by 6 (predetermined number), and the first divided imbalance i1, the second divided imbalance i12, and the third divided imbalance i3. , Fourth divided imbalance i4, fifth divided imbalance i5, and sixth divided imbalance i6 are generated. In this embodiment, an example in which the imbalance I is equally divided by 6 will be described, but weighting may be performed.

  Then, the calculation unit 313 assigns the first division imbalance i1 as the sum of the first charge / discharge instruction values i1r in the first division time (5 minutes) included in the management time, and then assigns the first charge / discharge instruction value i1r. The total of the discharge instruction value i1r is divided into each of the consumer group 101. And the transmission process part 312 transmits to each of the consumer group 101 as a charging / discharging command value for every consumer.

  The reception processing unit 311 of the present embodiment has a value that can specify the power consumption amount consumed by each consumer and the charge / discharge amount such as SOC from the consumer group 101 every 5 minutes (division time). The detailed measurement data including is received.

  Thereby, the calculation part 313 can estimate the charging / discharging amount a1 which the customer group 101 performed in the first division | segmentation time. Based on the charge / discharge amount a1, the calculation unit 313 calculates an unreached power amount r1 that has not been charged / discharged out of the total charge / discharge instruction value i1r. In this embodiment, it can be calculated from the following equation (1).

r1 = i1r-a1 (1)

  Then, the calculation unit 313 includes the unachieved power amount r1 in the total charge / discharge command value in the next division time. For example, the calculation unit 313 calculates the total of the second charge / discharge instruction value i2r by adding the unachieved power amount r1 to the second divided imbalance i2. In the present embodiment, the following equation (2) is used.

i2r = r1 + i2 (2)

  The calculation unit 313 divides the calculated second charge / discharge instruction value i2r into each of the customer groups 101. And the transmission process part 312 transmits to each of the consumer group 101 as a charging / discharging command value for every consumer.

  The calculation unit 313 of the present embodiment realizes charge / discharge control according to the first charge / discharge instruction value i1r to the sixth charge / discharge instruction value i6r in the management time (30 minutes) by repeating the above-described control. it can.

  That is, the calculation unit 313 can calculate the actual charge / discharge amounts a1 to a6 based on the detailed measurement data in units of 5 minutes received from each of the consumer groups 101. And the calculation part 313 can calculate unreachable electric energy r1-r6 corresponding to charging / discharging instruction | indication value from actual charging / discharging amount a1-a6. In this embodiment, it can be calculated from the following equation (3).

rx = ixr-ax (3)
Note that x = 1 to 6.

  And the calculation part 313 calculates charging / discharging instruction | indication value i2r-i6r based on electric energy r1-r5 for unachieved and division | segmentation imbalance i2-i6. In this embodiment, it can be calculated from the following equation (4).

ixr = r (x-1) + ix (4)
Note that x = 2 to 6.

  The calculation part 313 of this embodiment can suppress imbalance in a management time unit by performing charging / discharging control based on the measurement data of the customer group 101 received in units of 5 minutes.

  In the present embodiment, the case where the total demand predicted power amount and the power consumption amount actually consumed by the customer groups 101 and 102 coincide with each other has been described. However, in reality, even in a short-term prediction one hour ago, there is a difference from the actual power consumption.

  By the way, the prediction of power demand tends to be more accurate as it becomes closer to the time of execution.

  Therefore, in Modification 3, based on the measurement data received in 5 minutes from the customer group 101 provided with the storage battery 121 by the demand prediction processing unit 305, the total of the entire customer groups 101, 102 in 5 minutes. Calculate the demand forecast electric energy.

  In the present embodiment, the total demand predicted electric energy C of the customer groups 101 and 102 in the management time (30 minutes) unit in the short-term prediction (for example, one hour ago) is provided, and the storage battery 121 in the management time (30 minutes) unit is provided. It is assumed that the demand forecast electric energy Cb of the consumer group 101 is. In other words, based on the data collected from the smart meter 111, the total demand predicted power amount C and the demand predicted power amount Cb can be derived.

  For example, the total number of customer groups 101 and 102 is 10,000, and the number of customer groups including the storage battery 121 is 1,000. For 1000 houses, measurement data can be collected at any time in units of 5 minutes. For this reason, in this modification, the total demand prediction electric energy C of the 10,000 customer groups 101 and 102 is corrected from the demand prediction electric energy Cb of the 1000 customer groups 101. This is based on the assumption that the increase / decrease in the power amount of the 1,000 customer groups 101 and the increase / decrease in the power amount of the 10,000 customer groups 101, 102 are linked.

  The demand prediction processing unit 305 performs statistical / probabilistic calculation based on the power consumption included in the measurement data received in units of 5 minutes from the customer group 101 including the storage battery 121, and every 5 minutes. The demand prediction electric energy Cbx (x = 1-6) of the consumer group 101 is estimated.

  After that, the demand prediction processing unit 305 calculates the total demand prediction power amount Cx in units of 5 minutes of the total consumer group (customer groups 101 and 102) from the demand prediction power amount Cbx of the customer group 101 every 5 minutes. calculate. In the present embodiment, calculation is performed using the following equation (5).

Cx = C × (Cbx / Cb) (5)

  In this modification, it is set as the amount of power supply P per management time. In this case, the power supply amount divided in units of 5 minutes can be expressed as (P1, P2, P3, P4, P5, P6).

  Therefore, the calculation unit 313 calculates the division imbalance Ix (x = 1 to 6) in units of 5 minutes from the following equation (6).

Ix = Px−Cx (6)
Note that x = 1 to 6.

  In the present embodiment, the total demand prediction power amount Cx is calculated based on the measurement data obtained with the passage of time, and the divided imbalance Ix based on the total demand prediction power amount Cx is calculated.

  Then, the calculation unit 313 fills the customer group 101 from the divided imbalance Ix calculated based on the supplied power amount Px divided for each divided time and the total demand predicted electric energy Cx for each divided time. Calculate the discharge command value. The charging / discharging command value calculation method is the same as that in the first embodiment. And the transmission process part 312 outputs the charging / discharging instruction | indication value which cancels this division | segmentation imbalance Ix, and can improve the precision of cancellation | release of imbalance further.

  Incidentally, in the supply and demand management server 100, information obtained from the smart meters 111 and 112 has a temporary delay. For this reason, when estimating a demand prediction electric energy based on the information obtained from the smart meters 111 and 112, it will carry out based on the information of all the consumers one hour ago.

  On the other hand, in this modification, measurement of the consumer group 101 including the storage battery 121 that can collect the demand predicted power amount Cbx based on the data collected one hour ago in units of 5 minutes. By performing correction based on the data, the total demand predicted electric energy Cx of the customer groups 101 and 102 in units of 5 minutes is calculated.

  From the actual charge / discharge amounts a1 to a6 measured every 5 minutes, a cumulative value Ax of the charge / discharge amount can be derived by the following equation (7).

Ax = A (x−1) + ax (7)
Note that x = 1 to 6 and A0 = 0.

  Then, the calculation unit 313 calculates a charge / discharge command value based on the previous cumulative value A (x−1) and the divided imbalance Ix calculated by Expression (6). Formula (8) illustrates a calculation formula for the charge / discharge instruction value ixr.

ixr = D (x, Ix, A (x-1)) (8)

  The function D shown in Expression (8) calculates the x-th charge / discharge instruction value ixr from the charge / discharge timing number x, the corrected divided imbalance Ix, and the accumulated value A (x−1) executed so far. Function.

  The present modification does not limit the function D, but may be expressed as, for example, Expression (9).

D = (Ix−A (x−1) −1) / (6-x + 1) (9)

  Returning to the present embodiment, the supply and demand management server 100 receives the measurement data from the customer group 101 including the storage battery 121 and performs control for charging and discharging. Next, measurement data that the customer group 101 transmits to the supply and demand management server 100 every 5 minutes will be described.

  FIG. 11 is a diagram exemplifying a notification message including measurement data that each of the consumer group 101 transmits to the supply and demand management server 100. As illustrated in FIG. 11, the notification message includes destination information, a transmission source address, time, charge amount information (including SOC), and power consumption amount information.

  The destination information is address information indicating the supply and demand management server 100. The destination information is transferred to the supply and demand management server 100 via the public network 151.

  The transmission source address is address information (for example, IP address) indicating the storage battery 121. The supply and demand management server 100 manages the storage battery 121 using address information or the like. And the demand-and-supply management server 100 communicates by specifying the said address information as a transmission destination with respect to the required storage battery 121 as needed.

  The time is a time indicating the timing of measurement within the management time. The charge amount information is information related to the charge amount of the storage battery 121 and includes, for example, SOC. As a result, it is possible to recognize how much charging and discharging are possible in addition to the free capacity and charging capacity of the storage battery 121.

  The power consumption information is assumed to be power consumption measured by a measuring instrument (for example, smart meter 111) provided in the consumer. The supply and demand management server 100 can predict the power demand amount of the customer in the future at intervals of 5 minutes by receiving the power consumption information.

  In other words, the supply and demand management server 100 receives the notification message including the measurement data in units of 5 minutes, thereby improving the estimation accuracy of the total demand prediction power amount and realizing the charge / discharge instruction for canceling the imbalance. it can.

  FIG. 12 is a sequence diagram illustrating communication performed between the supply and demand management server 100 of the present embodiment and the first customer 101_1 including the storage battery 121_1. In the example shown in FIG. 12, the charge / discharge instruction is performed 6 times every 5 minutes in the management time (30 minutes), but the process performed from 10 minutes to 25 is the same process as in other time zones. Description is omitted as it is performed.

  First, the demand prediction processing unit 305 of the supply and demand management server 100 estimates the total demand prediction power amount of all customers within the management time (S1201).

  Next, the calculation unit 313 calculates an imbalance that is a difference between the supplied power amount and the total demand predicted power amount (S1202).

  The calculation part 313 calculates the charge / discharge instruction value of the 1st time (from 0 minute to 5 minutes) with respect to each of the consumer group 101 provided with the storage battery 121 based on the division | segmentation imbalance for the 1st time among imbalances. (S1203).

  The transmission processing unit 312 transmits the charge / discharge instruction value for the first time (from 0 to 5 minutes) to each of the customer groups 101 (including the first customer 101_1) (S1211).

  The first consumer 101_1 performs charge / discharge control according to the first charge / discharge instruction (S1212). Then, the first customer 101_1 transmits a notification message (shown in FIG. 11) that includes the charge amount information that is the result of charging and discharging and the power consumption amount information that is used by the load 204 and the like (shown in FIG. 11). S1213). In addition, the process of S1212-S1213 shall also perform the other consumer of the consumer group 101. FIG. Thereby, the calculation part 313 of the demand-and-supply management server 100 can estimate the amount of unachieved power corresponding to the charge instruction value based on the received charge amount information that is the result of charge / discharge and the power consumption amount information. .

  And the calculation part 313 is the charge / discharge of the 2nd time (from 5 minutes to 10 minutes) with respect to each of the consumer groups 101 based on the division | segmentation imbalance for the 2nd time, and the electric energy estimated to be unachieved. The instruction value is calculated (S1214).

  Then, the transmission processing unit 312 transmits the second (up to 5 to 10 minutes) charge / discharge instruction value to each of the consumer groups 101 (including the first consumer 101_1) (S1221).

  The first customer 101_1 performs charge / discharge control according to the second charge / discharge instruction (S1222). Then, the first customer 101_1 transmits a notification message including the charge amount information that is the result of charging / discharging and the power consumption amount information used by the load 204 or the like (S1223).

  And the calculation part 313 is the charge / discharge instruction | indication of the 3rd time (from 10 minutes to 15 minutes) with respect to each of the customer group 101 based on the division | segmentation imbalance for the 3rd time, and the electric energy for the 2nd time unachieved. A value is calculated (S1224).

  It is assumed that such control is similarly performed from 10 minutes to 25 minutes.

  Then, after 25 minutes have elapsed in the management time, the transmission processing unit 312 uses the sixth charge charge / discharge instruction value (from 25 minutes to 30 minutes) as a consumer group (including the first consumer 101_1). It transmits to each of 101 (S1261).

  The first customer 101_1 performs charge / discharge control according to the sixth charge / discharge instruction (S1262). Then, the first consumer 101_1 transmits a notification message including the charge amount information that is the result of charging / discharging and the power consumption amount information used in the load 204 or the like (S1263).

  By performing charge / discharge control in units of 5 minutes by the above-described processing procedure, imbalance suppression accuracy can be improved. As a result, it is possible to prevent waste of procurement power and liquidation of new power.

  In the embodiment described above, the example in which the imbalance is divided evenly every 5 minutes has been described. However, the present invention is not limited to the example in which the imbalance is evenly divided every 5 minutes. Therefore, in Modification 4, an example in which the calculation unit 313 assigns weights to imbalances will be described.

  FIG. 13 is a diagram exemplifying the division imbalance that is assigned when the calculation unit 313 of the fourth modification performs a charge / discharge instruction. In the example illustrated in FIG. 13, it is assumed that the imbalance power amount is predicted to be generated at 600 kWh. In such a case, the calculation unit 313 matches 150 kWh (first divided imbalance i11), 120 kWh (second divided imbalance i12), 110 kWh (third Are allocated charge / discharge amounts of 90 kWh (fourth divided imbalance i14), 80 kWh (fifth divided imbalance i15), and 50 kWh (sixth divided imbalance i16).

  As described above, the calculation unit 313 of the present modification uses the first divided time included in the management time for the first divided imbalance i11 that is larger than the electric energy obtained by dividing the imbalanced electric energy by 6 (predetermined number). Is assigned as a total charge / discharge command value for the customer group 101. Thereafter, the calculation unit 313 of the modification 4 is identified from the charge / discharge amount of the consumer group 101 received by the reception processing unit 311, and the unreached portion that has not been charged / discharged among the total of the charge / discharge command values. The amount of power obtained by adding the amount of power to the second divided imbalance i12 that is smaller than the first divided imbalance i11 is assigned as the sum of charge / discharge command values for the customer group 101 in the next divided time. In this modification, the process is repeated.

  As shown in Fig. 13, by allocating a larger imbalance in the first half and allocating a smaller imbalance in the second half, the second half can be dedicated to adjusting the amount of unachieved power, making it easy to adjust the imbalance. it can.

  Further, in the present modification, an example in which ¼ of the imbalance is assigned to the first divided imbalance i11 has been described, but it is not limited to ¼ and may be larger than ６ (predetermined number). It ’s fine. For example, all the imbalances may be assigned to the first divided imbalance i11.

  In the example shown in FIG. 13, the example in which the charge / discharge instruction is given every 5 minutes has been described. However, as shown in FIGS. 9 and 10, the timing at which the charge / discharge instruction is given may be varied.

(Second Embodiment)
1st Embodiment demonstrated the example which does not consider the demand pattern according to a consumer. 2nd Embodiment demonstrates the example which performed grouping according to the demand pattern of the electric power of a consumer.

  FIG. 14 is a diagram illustrating the configuration of the supply and demand management server 1300 according to the second embodiment. In the example illustrated in FIG. 14, the supply and demand management server 1300 includes a group data storage unit 1301 and a main processing unit 301 according to the first embodiment, as compared with the supply and demand management server 100 according to the first embodiment. Assume an example in which a main processing unit 1302 having a different process is provided and a demand prediction processing unit 1303 having a different process from the demand prediction processing unit 305 of the first embodiment is provided. In the present embodiment, the same components as those in the first embodiment are assigned the same reference numerals and description thereof is omitted.

  The group data storage unit 1301 stores information related to customer groups. FIG. 15 is a diagram exemplifying a customer management table stored in the group data storage unit 1301 of the present embodiment. As shown in FIG. 15, the customer management table stores customer identification information, groups, and presence / absence of storage batteries in association with each other. Information of all customers is accumulated in the customer management table of the present embodiment.

  The customer identification information may be information that can identify the customer. The group indicates a demand pattern to which the consumer belongs. The demand pattern is a pattern of power usage of the consumer, for example, a group divided according to the power usage trend for each time zone. Furthermore, the group etc. which were divided according to the monthly demand amount may be included.

  In this embodiment, the customer group 101 provided with the storage battery 121 and the customer group 102 not provided with the storage battery 121 can be identified for each group by holding the customer management table.

  FIG. 16 is a diagram exemplifying a predicted power amount calculation method management table stored in the group data storage unit 1301 of this embodiment. As shown in FIG. 16, the predicted power amount calculation method management table stores a group and a predicted power amount calculation method in association with each other.

  The predicted power amount calculation method defines a method for calculating the predicted power amount based on the power consumption amount received from the customer group 101 that includes the storage battery 121 and belongs to the group. Thus, in this embodiment, the calculation accuracy of imbalance can be improved by calculating the demand predicted power amount for each group having different demand patterns.

  Furthermore, the group data storage unit 1301 of the present embodiment stores a calculation algorithm corresponding to the charge control method for calculating the charge / discharge command value. In this embodiment, when a charge control method is specified for each group, a charge / discharge command value is calculated by using a calculation algorithm corresponding to the charge control method.

  In the present embodiment, a case where the entire consumers are divided into three groups, group A, group B, and group C will be described.

  In such a case, the demand prediction processing unit 1303 uses the group A demand prediction power amount CA and the group B demand prediction power as the demand prediction power amount for each group according to the power consumption pattern in the total consumer group. The demand forecast electric energy CC of the quantity CB and the group C is calculated. Any calculation method may be used as a method for calculating the predicted power demand for each group as long as the demand pattern for each group is taken into consideration.

  Furthermore, the demand prediction processing unit 1303 is, in unit time, a demand predicted power amount CAb of the customer group 101 that owns the storage battery 121 in the group A, a demand predicted power amount CBb of the customer group that owns the storage battery 121 in the group B, The demand prediction electric energy CCb of the consumer group which owns the storage battery 121 in the group C is calculated.

  Then, the demand prediction processing unit 1303 includes the predicted power amount of the group A stored in the group data storage unit 1301 in the measurement data transmitted every 5 minutes from the consumer group 101 including the storage battery 121 belonging to the group A. Apply the calculation method. As a result, the demand prediction processing unit 1303 calculates the demand prediction power amount CAbx for 5 minutes of the consumer group including the storage battery 121.

  Further, the demand prediction processing unit 1303 includes a demand prediction power amount CA of group A, a demand prediction power amount CAb of the customer group 101 including the storage battery 121 of group A, and a customer group including the storage battery 121 of group A. Based on the demand predicted power amount CAbx corrected in units of 5 minutes (x times), the demand predicted power amount CAx corrected in units of 5 minutes (x times) of the entire group A is calculated. Formula (10) is used for the calculation.

CAx = CA × (CAbx / CAb) (10)
Note that x = 1 to 6.

  The demand prediction processing unit 1303 uses the same method, and the demand forecast electric energy CBx corrected in the unit of 5 minutes (xth) for the entire group B and the demand corrected in the unit of 5 minutes (xth) of the entire group C. A predicted power amount CCx is calculated.

  Then, the demand prediction processing unit 1303 includes a demand forecast power amount CAx for the entire group A in units of 5 minutes, a demand forecast power amount CBx for the group B as a whole in units of five minutes, and a demand forecast power in the unit of groups C as a unit of 5 minutes. From the sum of the amount CCx, the total demand predicted power amount Cx of all the customer groups 101 and 102 is calculated. In the present embodiment, the following formula (11) is used.

Cx = CAx + CBx + CCx (11)

  In the present embodiment, the calculation accuracy of imbalance is improved by calculating the total demand predicted power amount Cx of all the customer groups 101 and 102 in units of 5 minutes by the above-described method. It becomes possible to suppress efficiently.

  Moreover, 1st Embodiment demonstrated the example which transmits charging / discharging command value for every consumer. However, when a charge / discharge command value is calculated for each consumer and a different charge / discharge command value is transmitted for each consumer, the processing load on the supply and demand management server 100 is large. Therefore, in this embodiment, the charge / discharge command value is an example calculated by each customer.

  The main processing unit 1302 includes a reception processing unit 311, a transmission processing unit 1312, and a calculation unit 1311.

  The calculation unit 1311 calculates the charge / discharge amount of the consumer group for each group based on the charge amount information included in the received measurement data. Furthermore, the calculation unit 1311 calculates the total charge amount of all customer groups including the storage battery 121.

  Thereafter, the calculation unit 1311 calculates an imbalance from the supplied power amount and the total demand predicted power amount Cx of all consumers.

  And the calculation part 1311 specifies a charge control method (for example, charging / discharging mode) for every group based on the calculated imbalance. In the present embodiment, for example, when the supplied power is larger than the total demand predicted power amount, for a group that is predicted to use power thereafter, a charge control method that increases the charge amount is specified, and the power For a group that is predicted not to use a charge control method, the charge control method that does not change much is specified. As described above, the calculation unit 1311 identifies the charge / discharge control method according to the group.

  And the transmission process part 1312 broadcasts the calculation algorithm corresponding to the charging / discharging control method (charge / discharge mode) specified for every group to each consumer.

  Thereby, each consumer calculates the charge / discharge command value according to the present situation (charge amount, demand prediction electric energy) using the calculation algorithm corresponding to the received charge / discharge control method, and the charge / discharge Charge / discharge control is performed according to the command value.

  FIG. 17 is a sequence diagram illustrating communication performed between the supply and demand management server 1300 of the present embodiment and the plurality of customers 101_1, 101_2, and 101_3 including the storage batteries 121_1, 121_2, and 121_2. In the present embodiment, the processing shown in FIG. 17 is performed every divided time (5 minutes) obtained by dividing the management time.

  The first consumer 101_1 transmits a notification message including charge amount information that is a result of charge / discharge and power consumption amount information used by the load 204 or the like (S1701).

  The second consumer 101_2 transmits a notification message including the charge amount information that is the result of charging / discharging and the power consumption amount information used by the load 204 or the like (S1702).

  The third consumer 101_3 transmits a notification message including the charge amount information that is the result of charging / discharging and the power consumption amount information used by the load 204 or the like (S1703).

  Next, the demand prediction processing unit 1303 calculates the total demand prediction power amount of all consumers within the divided time obtained by dividing the management time based on the received power consumption amount information (S1704).

  Furthermore, after calculating the charge / discharge amount of the consumer group for each group based on the received charge amount information, the calculation unit 1311 calculates the total charge amount of all the consumer groups including the storage battery (S1705). ).

  And the calculation part 1311 specifies a charging / discharging control method for every group (S1706).

  Then, the transmission processing unit 1312 broadcasts a calculation algorithm corresponding to the charge / discharge control method for each group, the total charge amount, and the total demand predicted power amount (S1707).

  And each consumer performs charging / discharging control according to the total charge amount and the total demand prediction electric energy using the calculation algorithm corresponding to the charging / discharging control method corresponding to the group allocated to the said consumer.

  In other words, after specifying the calculation algorithm corresponding to the charge / discharge control method defined for the group, the consumer of this embodiment receives the total charge amount and the total demand predicted power amount as arguments. By passing, the charge / discharge command value can be derived. And the consumer of this embodiment performs charging / discharging control so that it may become the said charging / discharging instruction | indication value. Thereby, the charge / discharge control for eliminating each imbalance can be realized.

  That is, the supply / demand management server 100 according to the first embodiment performs the charging / discharging command value specifying process by the customer group 101 including the storage battery 121 performing the self-charging / discharging command value specifying process. The control burden on the server 100 can be reduced.

  In the present embodiment, the supply and demand management server 1300 can realize charge / discharge control for eliminating the predicted imbalance.

  In the present embodiment, the example in which the calculation algorithm (charge / discharge control method) is changed for each group has been described. However, the present invention is not limited to such a method. For example, regardless of the group, each consumer may specify the charge / discharge allocation amount from the demand amount and the charge amount, and perform charge / discharge control so as to be the allocation amount.

  In the present embodiment, an example in which a calculation algorithm (charge / discharge control method) is transmitted to each consumer for each group has been described. However, the present invention is not limited to such a method. For example, as in the first embodiment, A charge / discharge command value may be transmitted to the customer group 101.

  In the present embodiment, by predicting the demand power amount for each group having a different demand pattern, it is possible to calculate the power amount that is imbalanced with higher accuracy. Furthermore, by performing charge / discharge control corresponding to each group, it is possible to suppress the generation of unreachable power and to achieve imbalance suppression with high accuracy.

  In the embodiment and the modification described above, for each divided time obtained by dividing the management time, the demand predicted power amount is calculated based on the measurement data received from each customer, and is filled in consideration of the demand predicted power amount. By performing the discharge control, it is possible to improve the accuracy of suppressing imbalance.

  Although some embodiments and modifications of the present invention have been described, these embodiments and modifications are presented as examples and are not intended to limit the scope of the invention. These novel embodiments and modifications can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 100 ... Supply-demand management server, 101,102 ... Consumer group, 103 ... Meter management server, 104 ... Power generation system, 111, 112 ... Smart meter, 121 ... Storage battery, 151 ... Public network, 152 ... Electric power system network, 154 ... Electric power Network between system providers, 200 ... Storage battery system, 201 ... Distribution line, 202 ... Power sensor, 204 ... Load, 211 ... Control unit, 212 ... Communication unit, 301 ... Main processing unit, 302 ... Meter information storage unit, 303 ... Storage information storage unit for each consumer, 304 ... Communication I / F, 305 ... Demand prediction processing unit, 306 ... Demand prediction information storage unit, 311 ... Reception processing unit, 312 ... Transmission processing unit, 313 ... Calculation unit, 1300 ... Supply / demand management server, 1301... Group data storage unit, 1302... Main processing unit, 1303. 1311 ... calculation unit, 1312 ... transmission processing unit.

Claims (8)

By controlling the storage battery of the first consumer group indicating the consumer group provided with the storage battery, which is included in the total consumer group that consumes the power supplied from the distribution system, power demand adjustment is performed. In the power management system to perform,
Based on the difference power amount between the supply power procured from the distribution system in the unit time in which power is bought and sold and the total demand prediction power amount that is predicted to be consumed by the total consumer group in the unit time A calculation unit for calculating a charge / discharge command value for the first consumer group for each divided time obtained by dividing the unit time by a predetermined number;
A transmitter for transmitting the charge / discharge command value to the first consumer group,
A power management system comprising: For each of the divided times, from the first consumer group, a receiving unit that receives power consumption consumed by each consumer;
Based on the power consumption amount of the first consumer group received by the receiving unit, the total demand predicted power amount that is predicted to be consumed by the total consumer group is calculated for each divided time. A prediction processing unit,
The calculation unit further calculates the charge / discharge command value based on the supply power divided for each division time and the total demand predicted power amount for each division time.
The power management system according to claim 1. The calculation unit, as the division time, the time obtained by equally dividing the unit time by the predetermined number, the time divided so that the interval becomes longer with the passage of time within the unit time, and the unit Use any one of the time divided so that the interval becomes shorter as time passes,
The power management system according to claim 1 or 2. The calculation unit calculates a divided power amount obtained by dividing the difference power amount by the predetermined number as a sum of charge / discharge command values for the first consumer group for each division time.
The power management system according to any one of claims 1 to 3. A receiving unit that receives the charge / discharge amount of the storage battery from the first consumer group for each divided time,
The calculation unit allocates the amount of power included in the difference power amount as a sum of charge / discharge command values of the first consumer group in an initial division time included in the unit time, and then receives the reception amount. The amount of unachieved power that was not charged or discharged out of the total of the charge / discharge command values specified from the charge / discharge amount of the first consumer group received by the unit, in the next divided time, Include in the total charge / discharge command value of the first consumer group,
The power management system according to any one of claims 1 to 4. A receiving unit that receives the charge / discharge amount of the storage battery from the first consumer group for each divided time,
The calculation unit calculates a first power amount that is larger than the power amount obtained by dividing the difference power amount by the predetermined number, in a first divided time included in the unit time, in a total of the first consumer group. After being assigned as a charge / discharge command value, the charge / discharge of the total charge / discharge command value specified by the charge / discharge amount of the first consumer group received by the receiver is not reached. Assigning the amount of power added to the second power amount less than the first power amount as the total charge / discharge command value of the first consumer group in the next divided time,
The power management system according to any one of claims 1 to 4. For each group according to the power consumption pattern of the total consumer group, the demand predicted power amount that is predicted to be consumed in the unit time is calculated, and the total demand predicted power amount calculated for each group is calculated. Further including a prediction processing unit that calculates the total demand predicted power amount,
The power management system according to claim 1. For each group according to the power consumption pattern of the total consumer group, the demand predicted power amount that is predicted to be consumed in the unit time is calculated, and the total demand predicted power amount calculated for each group is calculated. Further including a prediction processing unit that calculates the total demand predicted power amount,
The power management system according to claim 1.