WO2011135891A1 - 電力制御システム及び方法 - Google Patents
電力制御システム及び方法 Download PDFInfo
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- WO2011135891A1 WO2011135891A1 PCT/JP2011/053015 JP2011053015W WO2011135891A1 WO 2011135891 A1 WO2011135891 A1 WO 2011135891A1 JP 2011053015 W JP2011053015 W JP 2011053015W WO 2011135891 A1 WO2011135891 A1 WO 2011135891A1
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- power
- storage device
- distribution system
- power storage
- supply facility
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
Definitions
- the present invention relates to a power control system and method for controlling power generated by a power supply facility that is output to a distribution system.
- a large generator including a regulated power source requires a certain lead time (at least about 30 minutes) before power can be output from a shutdown state. Therefore, in order to cope with fluctuations in power demand, it is necessary to activate the regulated power supply before the power demand increases.
- the output power cannot be adjusted arbitrarily (to the extent that the output power can be turned ON / OFF). Need to be running.
- a regulated power source such as a thermal power plant has many opportunities to operate at a low operating rate, and it is difficult to increase the power generation efficiency. For this reason, the power generation cost will increase if the number of regulated power supplies during operation increases.
- PV Photo Voltaic generation
- WF wind power generation
- Renewable power sources such as PV and WF are generators whose output power cannot be adjusted arbitrarily.
- fluctuations that cannot be controlled by supply power in addition to the above fluctuations in power demand. appear.
- more regulated power supplies are required to cope with fluctuations in power supply as well as fluctuations in power demand. This means that power generation costs will increase for power companies, and when a consumer who owns a renewable power source sells surplus power to a power company, the price of the sold power is set low. It is a factor.
- the output power and the generated power from the renewable power source may exceed the power demand.
- the power supply and demand may not be balanced, causing frequency instability and power outages.
- the liberalization of the electric power market has allowed consumers to select electric power providers, and a regulated power supply is necessary to absorb the difference between the electric power demand and the supply electric power caused by this.
- a system operator electric power company
- the electric power company contracted with the consumer and the grid operator who operates the system to which the consumer is connected do not necessarily match.
- the electric power for the consumer is distributed through the system to which the consumer is connected (electric power consignment), the amount of power generated by the electric power company contracted with the consumer and the power consumption by the consumer (electric power demand) ) Does not match, it is necessary to absorb the difference in the system to which the customer is connected. That is, in a distribution system in which a large amount of power is used for consignment, the difference between the power generation amount and the demand amount becomes larger, so that a regulated power source is necessary to absorb the difference.
- the amount of power generated by the power operator contracted with the consumer and the power consumption by the customer (power demand) ) are measured and recorded every predetermined period (for example, 30 minutes), and a customer or an electric power company who has contracted with the customer in accordance with the difference in supply and demand manages the distribution system of the customer A system that pays penalties to operators is adopted.
- Non-Patent Document 1 proposes that the difference between the predicted power generation amount of PV and the actual power generation amount is absorbed by charging and discharging of the power storage device.
- the electric power company can formulate or modify an operation plan for the generator and the like based on the predicted electric power generation amount of each PV.
- the customer can adjust the power consumption based on the predicted power generation amount of PV. Therefore, it is possible to balance the power supply and demand of the distribution system.
- reverse power flow means outputting the electric power generated with the renewable power source which a consumer owns toward the electric power provider's distribution substation from the consumer.
- Non-Patent Document 1 uses PV capable of predicting the power generation amount relatively easily as a renewable power source, and further absorbs the difference between the predicted power generation amount of PV and the actual power generation amount by charging and discharging the power storage device. Propose to do. However, even with such a method, an error between the amount of power notified to the power provider and the customer in advance and the amount of power that can actually be output to the distribution system is unavoidable. In particular, when WF is used as a renewable power source, it is difficult to accurately predict the power generation amount because the power generation amount varies greatly depending on weather conditions.
- an object of the present invention is to provide a power control system and method capable of notifying a power company and a customer of an accurate amount of power to be output to a distribution system.
- a power control system of the present invention is a power control system for controlling power output to a distribution system, Power supply equipment that outputs generated power; A power storage device for storing electric power generated by the power supply facility; A communication device for transmitting and receiving information to and from a device provided by a power provider or customer connected to the power distribution system; In the predetermined period, the power generated by the power supply facility is charged in the power storage device, and the amount of power stored in the power storage device is supplied to a device included in the power provider or the customer using the communication device.
- a computing device that, after a predetermined time has passed since the notification, notifies the power provider or the device provided by the consumer of the amount of power that is discharged from the power storage device and outputs it to the power distribution system; , Have
- a power control system for controlling the power output to the distribution system, Power supply equipment that outputs generated power; A power storage device for storing electric power generated by the power supply facility; A communication device for transmitting and receiving information to and from a device provided by a power provider or customer connected to the power distribution system; In the predetermined period, the power generated by the power supply facility is charged in the power storage device, and the amount of power stored in the power storage device is supplied to a device included in the power provider or the customer using the communication device.
- the electric power provider or the electric power generated by the power supply facility and the power discharged from the power storage device or the power charged to the power storage device An arithmetic unit that outputs the amount of power that matches the amount of power notified to the device provided to the consumer to the distribution system;
- the power control method of the present invention is a power control system for controlling the power output to the distribution system, Power supply equipment that outputs generated power; A power storage device for storing electric power generated by the power supply facility; A communication device for transmitting and receiving information to and from a device provided by a power provider or customer connected to the power distribution system; A power control method for controlling the power output to the distribution system, Arithmetic unit is In the predetermined period, the power generated by the power supply facility is charged in the power storage device, and the amount of power stored in the power storage device is supplied to a device included in the power provider or the customer using the communication device. Notify In this method, after a predetermined time has elapsed since the notification, the amount of power notified to the device included in the electric power provider or the customer is discharged from the power storage device and output to the distribution system.
- a power storage device for storing electric power generated by the power supply facility;
- a communication device for transmitting and receiving information to and from a device provided by a power provider or customer connected to the power distribution system;
- a power control method for controlling the power output to the distribution system, Arithmetic unit is In the predetermined period, the power generated by the power supply facility is charged in the power storage device, and the amount of power stored in the power storage device is supplied to a device included in the power provider or the customer using the communication device.
- the electric power provider or the consumer uses the electric power generated by the power supply facility and the electric power to be discharged from the electric storage device or the electric power to be charged to the electric storage device. This is a method of outputting to the distribution system the amount of power that matches the amount of power notified to the device included in the power distribution system.
- FIG. 1 is a block diagram illustrating a configuration example of the power control system according to the first embodiment.
- FIG. 2 is a schematic diagram illustrating an example of transition of operation modes of the power storage device according to the first embodiment.
- FIG. 3 is a flowchart illustrating a processing procedure of the power control system according to the first embodiment.
- FIG. 4 is a graph illustrating an operation example of the power control system according to the first embodiment.
- FIG. 5 is a block diagram illustrating a configuration example of the power control system according to the second embodiment.
- FIG. 6 is a schematic diagram illustrating a transition example of the operation mode of the power storage device according to the second embodiment.
- FIG. 7 is a flowchart illustrating a processing procedure of the power control system according to the second embodiment.
- FIG. 1 is a block diagram illustrating a configuration example of the power control system according to the first embodiment.
- FIG. 2 is a schematic diagram illustrating an example of transition of operation modes of the power storage device according to the first embodiment.
- FIG. 8 is a graph illustrating an operation example of the power control system according to the second embodiment.
- FIG. 9 is a block diagram illustrating a configuration example of the power control system according to the third embodiment.
- FIG. 10 is a schematic diagram illustrating a transition example of the operation mode of the power storage device according to the third embodiment.
- FIG. 11 is a flowchart illustrating a processing procedure of the power control system according to the third embodiment.
- FIG. 12 is a graph illustrating an operation example of the power control system according to the third embodiment.
- FIG. 1 is a block diagram illustrating a configuration example of the power control system according to the first embodiment.
- the power control system of the first embodiment includes a power supply facility 1 that outputs generated power, and N units (N is an integer of 3 or more) that accumulates the power generated by the power supply facility 1. ) Of the power storage devices 2 1 to 2 N , the power supply facility 1 and the power storage devices 2 1 to 2 N , the selector 3 that connects the power storage devices 2 1 to 2 N and the power distribution system,
- This configuration includes a communication device 6 for transmitting and receiving information, a power supply facility 1, power storage devices 2 1 to 2 N , a selector 3, and an arithmetic device 7 that controls operations of the communication device 6.
- the solid lines connecting between the power supply facility 1 and the selector 3, between the selector 3 and the power storage devices 2 1 to 2 N, and between the selector 3 and the distribution system shown in FIG. 1 are power lines for transmitting and receiving power.
- the dotted lines connecting between the communication device 6 and the arithmetic device 7 shown in FIG. 1, between the power supply facility 1 and the arithmetic device 7, between the arithmetic device 7 and the selector 3, and between the arithmetic device 7 and the power storage devices 2 1 to 2 N are An information communication line for transmitting and receiving information is shown.
- the power supply facility 1 for example, a known renewable power source such as PV or FW is used.
- the power supply facility 1 may use any power supply device as long as it can generate power, as well as a renewable power source. However, power supply devices whose generated power can be adjusted arbitrarily are excluded.
- FIG. 1 shows a configuration example assuming a case where the power generated by the power supply facility 1 is directly charged into the power storage devices 2 1 to 2 N.
- the power supply facility 1 includes a known DC-DC converter that converts the output voltage in accordance with the specifications of the power storage devices 2 1 to 2 N.
- a known AC-DC converter that converts the AC voltage into a DC voltage may be provided.
- the power supply facility 1 may be provided with a known power conditioner or the like for taking out electric power from a power supply device to the maximum and outputting it.
- the power storage devices 2 1 to 2 N include a known rechargeable battery that can be charged and discharged and a known charge / discharge controller that controls charging / discharging of the rechargeable battery.
- Examples of the rechargeable battery include a lithium ion battery, a nickel hydrogen battery, and a sodium sulfur battery.
- the charge / discharge controller charges the rechargeable battery with the power generated by the power supply facility 1 and outputs (discharges) the power stored in the rechargeable battery to the distribution system.
- the power storage devices 2 1 to 2 N of the present embodiment include a measurement unit (not shown) that measures the amount of power stored in the rechargeable battery, and the measured power amount is calculated via the information communication line. Can be reported to.
- the measurement unit can be realized by a known coulomb counter that detects the charge / discharge current of the rechargeable battery and a current detection circuit equipped with a CPU that calculates the remaining capacity of the rechargeable battery by integrating current values measured by the coulomb counter. .
- FIG. 1 it is assumed that the power generated by the power supply facility 1 is directly charged to the rechargeable battery included in the power storage devices 2 1 to 2 N and the power stored in the rechargeable battery is directly output to the distribution system.
- An example of the configuration is shown.
- the power storage devices 2 1 to 2 N are output from, for example, the power supply facility 1
- an AC voltage is output from a well-known DC-DC converter that adjusts the voltage (DC) to a charging voltage that meets the specifications of the rechargeable battery or the power supply facility 1, the AC voltage is applied to the power storage devices 2 1 to 2 N.
- the power storage devices 2 1 to 2 N are provided with inverters or the like that convert power (DC) discharged from the rechargeable battery into AC power that can be output to the distribution system. You may have. Furthermore, the power storage devices 2 1 to 2 N may include a known protection device that prevents overcharge and overdischarge of the rechargeable battery.
- Selector 3 for example, a first movable contact connected to the output terminal of the power supply facilities 1, and a second movable contact connected to a power distribution system, the first contact, second N connected to the power storage device 2 1 - 2 N
- the power supply facility 1 and the power storage devices 2 1 to 2 N are connected by operating the first movable contact and the second movable contact according to the instruction of the arithmetic unit 7, and the power distribution system and the power storage device 2 1.
- ⁇ 2 Connect N Power electric power generated by the equipment 1 is charged to the power storage device 2 1 ⁇ 2 N via the selector 3, electric power discharged from power storage device 2 1 ⁇ 2 N are output to the power distribution system via the selector 3.
- the arithmetic unit 7 can be realized by a CPU or DSP that executes predetermined processing according to a program, an integrated circuit including various logic circuits, or the like.
- the communication device 6 is a device (not shown) provided in an electric power company or a customer connected to the distribution system, for example, a device that formulates a power generation plan by the electric power company, or a device that formulates a consumer's consumption plan (hereinafter, referred to as a power consumption plan). These devices are collectively referred to as “power planning device”) and have a function of transmitting and receiving information.
- the power planning device can be realized by devices described in, for example, Japanese Patent No. 3880471, Japanese Patent Application Laid-Open No. 2008-295175, Japanese Patent Application Laid-Open No. 2009-303411, and the like.
- a well-known PLC (Power Line Communications) method using a power line or BPL (Broadband over Power) is used for information communication between the communication device 6 and the power planning device, and between the arithmetic device 7 and the power storage devices 2 1 to 2 N and the selector 3.
- PLC Power Line Communications
- BPL Broadband over Power
- Lines the Internet
- a well-known wireless communication method may be used for information communication between the communication device 6 and the power planning device, and between the arithmetic device 7, the power storage devices 2 1 to 2 N, and the selector 3.
- the arithmetic device 7 and the communication device 6 shown in FIG. 1 may be provided as individual devices, or may be realized by an information processing device (computer) including the functions of these devices.
- the power control system charges the power storage device with the power generated by the power supply facility 1 during the predetermined period T, and stores the power in the power storage device at the end of the period T.
- the electric power amount is notified to the power planning apparatus as the electric energy to be output to the distribution system.
- T ⁇ (N ⁇ 2) to T ⁇ (N ⁇ 1) after notifying the amount of power to be output to the distribution system, the previously notified power is actually output to the distribution system.
- the power (W) is constantly output from the power control system of the present embodiment to the distribution system in the period T.
- the power output to the distribution system does not need to be constant and can be changed. May be.
- the power output pattern in the period T is designated by the power company that manages the distribution system, the power output pattern may be output to the distribution system according to the power output pattern.
- the total amount of power (power ⁇ time: Wh) that can be output to the distribution system in the period T needs to be the same whether the power is output at a constant value or the specified power output pattern.
- FIG. 2 shows a transition example of the operation mode of each power storage device in the first embodiment.
- FIG. 2 shows that time has passed from the left to the right, and each row in FIG. 2 shows an operation mode of the power storage devices 2 1 to 2 N (power storage devices 1 to N).
- the operation mode “charging” shown in FIG. 2 indicates a state in which the electric power generated by the power supply facility 1 is charged in the power storage device.
- the selector 3 connects the first movable contact and the contact corresponding to the power storage device.
- the arithmetic device 7 acquires the value of the amount of power (charged amount) stored in the power storage device, and “T ⁇ (N ⁇ 2) to T ⁇ (N ⁇ 1) ”is notified to the power planning apparatus as“ amount of power to be output to the distribution system ”.
- the operation mode “discharge” shown in FIG. 2 indicates a state in which the discharged electric power of the power storage device is output to the distribution system.
- the selector 3 connects the second movable contact and the contact corresponding to the power storage device.
- the operation mode “standby” shown in FIG. 2 indicates a state where the power storage device is neither charged nor discharged.
- the selector 3 opens the contact corresponding to the power storage device.
- the N power storage devices 2 1 to 2 N are repeatedly operated in three operation modes of charging, standby, and discharging, respectively, 1 is actually output to the distribution system after T ⁇ (N ⁇ 2) to T ⁇ (N ⁇ 1). Therefore, the power control system of the present embodiment can be realized if it includes three or more power storage devices 2 1 to 2 N.
- the power storage device 2 1 is set such that any one power storage device is set to the operation mode “charge” and any one power storage device is set to the operation mode “discharge”. ⁇ 2 N operation modes are changed in order of charge, standby, and discharge. Therefore, power can be continuously output to the distribution system.
- FIG. 3 is a flowchart illustrating a processing procedure of the power control system according to the first embodiment.
- the arithmetic unit 7 first assigns 0 to a variable m (step A1).
- the arithmetic unit 7 substitutes m + 1 for the variable m (step A2), and determines whether m> N is satisfied (step A3). If m> N, m ⁇ N is substituted for variable m (step A4), and m + 1 is substituted for variable n (step A5). When the variable m is N or less in the process of step A3, the arithmetic unit 7 proceeds to the process of step A5 and substitutes m + 1 for the variable n.
- the arithmetic unit 7 determines whether or not n> N (step A6). If n> N, n ⁇ N is substituted for the variable n (step A7). The first movable contact is connected to the contact m, and the second movable contact is connected to the contact n (step A8). When the variable n is N or less in the process of step A6, the arithmetic unit 7 proceeds to the process of step A8, causes the selector 3 to connect the first movable contact to the contact m, and the second movable contact to the contact n. Connect to.
- the arithmetic device 7 acquires the amount of stored electricity Sn from the power storage device n, calculates the output power (Sn / T) in the period T, and outputs the power Sn / T to the power distribution system n. Instruct (Step A9).
- the power storage device n stores the amount of power Sn generated by the power supply facility 1 in the past period T ⁇ (N ⁇ 2) to T ⁇ (N ⁇ 1).
- the arithmetic unit 7 instructs the power storage device m to charge the electric power generated by the power supply facility 1 in the period T (step A10).
- the arithmetic unit 7 stands by until the period T elapses (step A11), and outputs the value of the charged amount Sm of the power storage device m to the distribution system after “T ⁇ (N ⁇ 2) to T ⁇ (N ⁇ 1)”.
- the power amount is notified to the power plan apparatus via the communication device 7 (step A12).
- the arithmetic unit 7 performs T ⁇ (N -2) to T ⁇ (N-1), power may be output to the distribution system.
- step A12 When the processing of step A12 is completed, the arithmetic device 7 returns to the processing of step A2 and repeats the processing of steps A2 to A12.
- the capacity of the rechargeable battery included in the power storage devices 2 1 to 2 N is preferably W REmax ⁇ T (Wh) or more. If the capacity of the rechargeable battery is equal to or greater than W REmax ⁇ T (Wh), even if the power supply facility 1 generates power at the maximum output during the period T, all the power can be stored in the power storage devices 2 1 to 2 N. In that case, the electric power generated by the power supply facility 1 that is discarded without being used can be reduced.
- the total capacity of the necessary power storage devices 2 1 to 2 N is W REmax ⁇ T ⁇ N (Wh), and the actual amount of power output to the distribution system is notified.
- the interval until the power is output is T ⁇ (N ⁇ 2) (h), and the time during which power can be output in an arbitrary pattern is T (h).
- the amount of power actually stored in the power storage devices 2 1 to 2 N is notified to the power planning device provided by the power company or customer every period T, and is constant. Since the notified amount of power is output to the distribution system after the elapse of time, it is possible to notify the power provider and the customer of the accurate amount of power to be output to the distribution system.
- the grid operator who manages the distribution system and the electric power company who entrusts the power consignment to another power company can formulate or modify the power generation plan based on the notified accurate power amount.
- FIG. 5 is a block diagram illustrating a configuration example of the power control system according to the second embodiment.
- the selector 8 includes a first movable contact connected to the output end of the power supply facility 1 and the input end of the power distribution system, and the power storage devices 2 1 to 2. 2, the first contact point to the Nth contact point connected to N , and by operating the first movable contact point according to the instruction of the arithmetic unit 7, the power supply facility 1 and the power distribution system, and the power storage devices 2 1 to 2 N Are connected to each other. Power electric power generated by the equipment 1 is charged to the power storage device 2 1 ⁇ 2 N via a selector 8, electric power discharged from power storage device 2 1 ⁇ 2 N are output to the power distribution system via the selector 8.
- the power control system of the present embodiment can be realized if it includes two or more power storage devices 2 1 to 2 N , as will be described later.
- the power supply facility 1 of this embodiment is provided with the function which measures generated electric power and notifies the measured value to the arithmetic unit 7.
- FIG. A known power meter or the like may be used to measure the generated power.
- the charge and discharge controller which is generated by the power equipment 1 Of the power, predetermined power is charged to the rechargeable battery in accordance with an instruction from the arithmetic device 7, and among the electric power stored in the rechargeable battery, predetermined power is output to the distribution system according to the instruction from the arithmetic device 7 (Discharge).
- a charge / discharge controller integrates the current value measured by a well-known coulomb counter that detects the charge / discharge current of the rechargeable battery, and the coulomb counter, and calculates the remaining capacity of the rechargeable battery according to instructions from the CPU.
- the N power storage devices 2 1 to 2 N are sequentially shifted in two operation modes of charging / discharging and standby, respectively, and the power storage devices 2 1 to 2 in the period T are described above.
- the amount of power stored in N is output to the distribution system after T ⁇ (N ⁇ 1) to T ⁇ N. That is, the power control system of the present embodiment can be realized if it includes two or more power storage devices 2 1 to 2 N.
- the operation mode “charging / discharging” indicates a state where the power storage devices 2 1 to 2 N are charged or discharged.
- the power supply facility 1 and the power distribution system are simultaneously connected to one power storage device 2, so the power supply facility 1 The power being generated is also output.
- the amount of power previously notified to the power planning device is larger than the amount of power currently generated by the power supply facility 1, the amount of power stored in the power storage device 2 is compensated for by the amount of power, If the amount of power previously notified to the power planning device is less than the amount of power currently generated by the power supply facility 1, the power storage device 2 is charged with the difference amount of power.
- FIG. 6 illustrates a transition example of the operation mode of each power storage device according to the second embodiment. 6 shows that time has passed from the left to the right, and each row in FIG. 6 shows the operation mode of the power storage devices 2 1 to 2 N (power storage devices 1 to N).
- the operation mode “charging / discharging” shown in FIG. 6 indicates a state where the power storage device 2 is charged or discharged as described above.
- the selector 8 connects the first movable contact and the contact corresponding to the power storage device.
- the operation mode “standby” shown in FIG. 6 indicates a state where the power storage device 2 is neither charged nor discharged.
- the selector 8 opens the contact point connected to the power storage device 2.
- the N power storage devices 2 1 to 2 N are repeatedly operated in two operation modes of charging / discharging and standby, respectively, so that the period T Then, the amount of power generated by the power supply facility 1 is output to the distribution system after T ⁇ (N ⁇ 1) to T ⁇ N.
- the operation mode of the power storage devices 2 1 to 2 N is charged / discharged and placed on standby so that any one power storage device 2 is always set to the operation mode “charge / discharge”. Transition in the order. Therefore, power can be continuously output to the distribution system.
- FIG. 7 is a flowchart illustrating a processing procedure of the power control system according to the second embodiment.
- the processing shown in FIG. 7 is executed by the arithmetic device 7 shown in FIG.
- the power storage device m An example is shown in which the electric power generated by the power supply facility 1 is charged or the electric power stored in the power storage device m is output to the distribution system.
- the contact of the selector 3 connected to the power storage device m is indicated by the contact m.
- the arithmetic unit 7 first assigns 0 to a variable m (step B1).
- the arithmetic unit 7 substitutes m + 1 for the variable m (step B2), and determines whether m> N is satisfied (step B3). If m> N, m ⁇ N is substituted for the variable m (step B4), and the current time is recorded in the variable T0 (step B5). When the variable m is N or less in the process of step B3, the arithmetic unit 7 proceeds to the process of step B5 and records the current time in the variable T0.
- the arithmetic unit 7 causes the selector 8 to connect the first movable contact to the contact m (step B6).
- the power storage device m stores the amount of power Sm generated by the power supply facility 1 in the past period T ⁇ (N ⁇ 1) to T ⁇ N.
- the arithmetic unit 7 acquires the electric power W RE (W) that is currently generated from the power supply facility 1 (step B8), and determines whether or not W RE ⁇ Wm (step B9).
- the computing device 7 instructs the power storage device m to discharge the power of Wm ⁇ W RE so that the power of Wm can be output to the power distribution system (step B10).
- W RE is greater than or equal to Wm
- arithmetic unit 7 instructs power storage device m to be charged with W RE ⁇ Wm so that the power of Wm can be output to the distribution system (step B11).
- Step B12 the arithmetic unit 7 determines whether or not the current time has passed T or more from T0 (Step B12). If the current time has not passed T0 or more than T, the processing of Steps B8 to B12 is repeated. .
- the arithmetic unit 7 acquires the amount of power Sm accumulated from T0 to T from the power storage device m, and calculates the amount of power Sm from “T ⁇ (N ⁇ 1) ⁇ As the “amount of power output to the distribution system after T ⁇ N”, the power planning apparatus is notified via the communication device 6 (step B13). Although not shown in FIG. 7, when information specifying a power output pattern is transmitted from the power provider (or customer) in response to this notification, the arithmetic device 7 performs T ⁇ (N -1) Power may be output to the distribution system after T ⁇ N.
- step B13 When the processing of step B13 is completed, the arithmetic unit 7 returns to the processing of step B2 and repeats the processing of steps B2 to B13.
- 5 to 7 show an example in which the storage devices 2 1 to 2 N are connected to the power supply facility 1 and the distribution system by the selector 8 one by one. You may connect an electrical storage apparatus simultaneously. In that case, if a plurality of power storage devices simultaneously connected to the power supply facility 1 and the power distribution system are replaced with one power storage device m, the same control as described above is possible.
- the capacity of the rechargeable battery included in the power storage devices 2 1 to 2 N is preferably W REmax ⁇ T (Wh) or more. If the capacity of the rechargeable battery is equal to or greater than W REmax ⁇ T (Wh), even if the power supply facility 1 generates power at the maximum output during the period T, all the power can be stored in the power storage devices 2 1 to 2 N. In that case, the electric power generated by the power supply facility 1 that is discarded without being used can be reduced.
- the total capacity of the necessary power storage devices 2 1 to 2 N is W REmax ⁇ T ⁇ N (Wh), and the actual amount of power output to the distribution system is notified.
- the interval until the power is output is T ⁇ (N ⁇ 1) (h), and the time during which power can be output in an arbitrary pattern is T (h).
- FIG. 8 shows a case where the number N of power storage devices is 2 and PV is used as the power supply facility 1, the power storage amount (Wh), the charge / discharge power (W) of the power storage devices 2 1 to 2 N with respect to the change in the power generation amount.
- Wh the power storage amount
- W charge / discharge power
- FIG. 8 illustrates a state where the power output to the distribution system is constant in the period T.
- the table shown in FIG. 8 shows the operation modes of the power storage devices 2 1 to 2 N as in FIG.
- FIG. 9 is a block diagram illustrating a configuration example of the power control system according to the third embodiment.
- one power storage device 2 is directly connected to the output end of the power supply facility 1 and the distribution system, and the amount of power stored in the power storage device 2 is further increased. Is provided for each period T.
- the storage device 9 is provided. Since other configurations are the same as those of the power control system of the second embodiment, the description thereof is omitted.
- the storage device 9 can be realized by a magnetic disk, a semiconductor memory, an optical disk, or other recording media.
- the arithmetic device 7, the communication device 6, and the storage device 9 shown in FIG. 9 may be provided as individual devices, or may be realized by an information processing device (computer) including the functions of these devices.
- one power storage device 2 is sequentially shifted in two operation modes of charging / discharging and standby similarly to the second embodiment, and power is stored in the period T.
- the amount of power stored in the device 2 is output to the distribution system after T ⁇ (N ⁇ 1) to T ⁇ N.
- N indicates the number of regions virtually set in order to cause one power storage device 2 to transition in the two operation modes of charging / discharging or standby as in the second embodiment. Yes.
- the area is virtually set according to the periods T and N, and does not indicate that the power storage device 2 is physically divided into N areas.
- the operation mode “charging / discharging” indicates a state in which the power storage device 2 is charged or discharged, as in the second embodiment.
- the power supply facility 1 and the power distribution system are connected to one power storage device 2, respectively, and thus the same as in the second embodiment.
- the power currently generated by the power supply facility 1 is also output to the distribution system.
- the amount of power previously notified to the power planning device is greater than the amount of power currently generated by the power supply facility 1, the amount of power stored in the power storage device 2 is compensated for by the amount of power. If the amount of power previously notified to the power planning device is less than the amount of power currently generated by the power supply facility 1, the power storage device 2 is charged with the difference in amount of power.
- FIG. 10 shows an example of the transition of the operation mode of the power storage device in the third embodiment. 10 shows that time has passed from the left to the right, and each row in FIG. 10 shows the operation mode of each of the regions 1 to N of the power storage device 2.
- the operation mode “charging / discharging” shown in FIG. 10 indicates a state where the power storage device 2 is charged or discharged as described above.
- the operation mode “standby” illustrated in FIG. 10 indicates a state in which the power storage device 2 is not charged or discharged.
- one power storage device 2 is virtually divided into N areas, and each area is repeatedly operated in two operation modes of charging / discharging and standby. By doing so, the amount of power generated by the power supply facility 1 in the period T is output to the distribution system after T ⁇ (N ⁇ 1) to T ⁇ N.
- the operation mode of each area is changed in the order of charge / discharge and standby so that any one area is always set to the operation mode “charge / discharge”. Therefore, power can be continuously output to the distribution system.
- the power storage device 2 since the power storage device 2 is one as described above, when the operation mode of the power storage device 2 is changed as shown in FIG. 10, the power storage device 2 actually enters the operation mode “standby”. There is no migration.
- FIG. 11 is a flowchart illustrating a processing procedure of the power control system according to the third embodiment.
- region m to a distribution system is shown.
- the arithmetic unit 7 first stores the sum of the power amounts S 1 to S N for each of the N areas of the power storage device 2 stored in the storage device 9 in the power storage device 2. Give a value that matches the amount of power currently stored. For example, a value obtained by dividing the amount of power currently stored in the power storage device 2 by N is equally substituted for the amounts of power S 1 to S N for each region (step C1).
- the arithmetic unit 7 substitutes 0 for the variable m held in the storage unit 9 (step C2).
- the arithmetic unit 7 substitutes m + 1 for the variable m (step C3), and determines whether m> N is satisfied (step C4). If m> N, m ⁇ N is substituted for variable m (step C5), and the current time is recorded in variable T0 (step C6). When the variable m is N or less in the process of step C4, the arithmetic unit 7 proceeds to the process of step C6 and records the current time in the variable T0.
- the arithmetic unit 7 acquires the value of the electric power W RE (W) currently generated from the power supply facility 1 (step C8), and determines whether or not W RE ⁇ Wm (step C9).
- the computing device 7 instructs the power storage device 2 to discharge the power of Wm ⁇ W RE so that the power of Wm can be output to the power distribution system (step C10).
- arithmetic unit 7 instructs power storage device 2 to charge W RE ⁇ Wm so that the power of Wm can be output to the power distribution system (step C11).
- the arithmetic unit 7 determines whether or not the current time has passed T or more from T0 (step C12). If the current time has not passed T0 or more, processing in steps C8 to C12 is performed. repeat.
- the power amount Sm stored in the power storage device 2 from T0 to T is recorded in the storage device 9 (step C13), and the power amount Sm is set to “T ⁇ (N-1) to “the amount of power to be output to the distribution system after T ⁇ N” ”is notified to the power planning apparatus via the communication device 6 (step C14).
- the arithmetic unit 7 performs T ⁇ (N -1) Power may be output to the distribution system after T ⁇ N.
- step C14 When the processing of step C14 is completed, the arithmetic unit 7 returns to the processing of step C3 and repeats the processing of steps C3 to C14.
- the capacity of the rechargeable battery included in the power storage device 2 is desirably W REmax ⁇ T (Wh) or more. If the capacity of the rechargeable battery is greater than or equal to W REmax ⁇ T (Wh), even if the power supply facility 1 generates power at the maximum output during the period T, all the electric power can be stored in the power storage device 2. In that case, the electric power generated by the power supply facility 1 that is discarded without being used can be reduced.
- the required total capacity of the power storage device 2 is W REmax ⁇ T ⁇ N (Wh), from the notification of the amount of power output to the distribution system to the actual output
- the interval is T ⁇ (N ⁇ 1) (h)
- the time during which power can be output in an arbitrary pattern is T (h).
- FIG. 12 shows the storage amount (Wh), charge / discharge power (W) of the power storage device with respect to changes in the amount of power generation when the number N of power storage device areas is 2 and PV is used as the power supply facility 1.
- W charge / discharge power
- FIG. 12 shows the mode in case the electric power output to a power distribution system is constant in the period T.
- the table shown in FIG. 12 shows the operation mode of each region of the power storage device as in FIG.
- the same effects as those of the power control systems of the first embodiment and the second embodiment can be obtained. Only one device 2 is required.
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- Engineering & Computer Science (AREA)
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- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
Description
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電力事業者または前記需要家が備える装置へ通知した電力量を、前記蓄電装置から放電させて前記配電系統へ出力させる演算装置と、
を有する。
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電源設備で発電している電力と、前記蓄電装置から放電させる電力または前記蓄電装置に充電させる電力とにより、前記電力事業者または前記需要家が備える装置へ通知した電力量と一致する電力量を前記配電系統へ出力させる演算装置と、
を有する。
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
を備え、前記配電系統へ出力する電力を制御するための電力制御方法であって、
演算装置が、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、
該通知してから所定の時間が経過した後、前記電力事業者または前記需要家が備える装置へ通知した電力量を、前記蓄電装置から放電させて前記配電系統へ出力させる方法である。
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
を備え、前記配電系統へ出力する電力を制御するための電力制御方法であって、
演算装置が、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、
該通知してから所定の時間が経過した後、前記電源設備で発電している電力と、前記蓄電装置から放電させる電力または前記蓄電装置に充電させる電力とにより、前記電力事業者または前記需要家が備える装置へ通知した電力量と一致する電力量を前記配電系統へ出力させる方法である。
(第1の実施の形態)
図1は第1の実施の形態の電力制御システムの一構成例を示すブロック図である。
(第2の実施の形態)
図5は、第2の実施の形態の電力制御システムの一構成例を示すブロック図である。
(第3の実施の形態)
図9は、第3の実施の形態の電力制御システムの一構成例を示すブロック図である。
Claims (12)
- 配電系統へ出力する電力を制御するための電力制御システムであって、
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電力事業者または前記需要家が備える装置へ通知した電力量を、前記蓄電装置から放電させて前記配電系統へ出力させる演算装置と、
を有する電力制御システム。 - 配電系統へ出力する電力を制御するための電力制御システムであって、
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電源設備で発電している電力と、前記蓄電装置から放電させる電力または前記蓄電装置に充電させる電力とにより、前記電力事業者または前記需要家が備える装置へ通知した電力量と一致する電力量を前記配電系統へ出力させる演算装置と、
を有する電力制御システム。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記電源設備と前記蓄電装置とを少なくとも1台ずつ接続し、前記配電系統に対して前記電源設備とは異なる蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置は、
前記期間T毎に、前記セレクタにより前記電源設備に前記蓄電装置を順次接続させ、前記電源設備に接続した蓄電装置と異なる蓄電装置に前記配電系統を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-2)~T×(N-1)後に前記配電系統に出力させる請求項1記載の電力制御システム。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記蓄電装置と前記電源設備及び前記配電系統に対して前記蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置は、
前記期間T毎に、前記セレクタにより前記電源設備及び前記配電系統に前記蓄電装置を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-1)~T×N後に前記配電系統に出力させる請求項2記載の電力制御システム。 - 配電系統へ出力する電力を制御するための電力制御システムであって、
発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
を備え、前記配電系統へ出力する電力を制御するための電力制御方法であって、
演算装置が、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、
該通知してから所定の時間が経過した後、前記電力事業者または前記需要家が備える装置へ通知した電力量を、前記蓄電装置から放電させて前記配電系統へ出力させる電力制御方法。 - 発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
を備え、前記配電系統へ出力する電力を制御するための電力制御方法であって、
演算装置が、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、
該通知してから所定の時間が経過した後、前記電源設備で発電している電力と、前記蓄電装置から放電させる電力または前記蓄電装置に充電させる電力とにより、前記電力事業者または前記需要家が備える装置へ通知した電力量と一致する電力量を前記配電系統へ出力させる電力制御方法。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記電源設備と前記蓄電装置とを少なくとも1台ずつ接続し、前記配電系統に対して前記電源設備とは異なる蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置が、
前記期間T毎に、前記セレクタにより前記電源設備に前記蓄電装置を順次接続させ、前記電源設備に接続した蓄電装置と異なる蓄電装置に前記配電系統を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-2)~T×(N-1)後に前記配電系統に出力させる請求項5記載の電力制御方法。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記蓄電装置と前記電源設備及び前記配電系統に対して前記蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置が、
前記期間T毎に、前記セレクタにより前記電源設備及び前記配電系統に前記蓄電装置を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-1)~T×N後に前記配電系統に出力させる請求項6記載の電力制御方法。 - 発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
を備えた電力制御システムを用いて配電系統へ出力する電力を制御するための情報処理装置であって、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電力事業者または前記需要家が備える装置へ通知した電力量を、前記蓄電装置から放電させて前記配電系統へ出力させる演算装置と、
を有する情報処理装置。 - 発電した電力を出力する電源設備と、
前記電源設備で発電された電力を蓄積する蓄電装置と、
を備えた電力制御システムを用いて配電系統へ出力する電力を制御するための情報処理装置であって、
前記配電系統に接続された電力事業者または需要家が備える装置と情報を送受信するための通信装置と、
所定の期間において、前記電源設備で発電された電力を前記蓄電装置に充電させると共に、該蓄電装置に蓄積された電力量を前記電力事業者または前記需要家が備える装置へ前記通信装置を用いて通知し、該通知してから所定の時間が経過した後、前記電源設備で発電している電力と、前記蓄電装置から放電させる電力または前記蓄電装置に充電させる電力とにより、前記電力事業者または前記需要家が備える装置へ通知した電力量と一致する電力量を前記配電系統へ出力させる演算装置と、
を有する情報処理装置。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記電力制御システムに、
前記電源設備と前記蓄電装置とを少なくとも1台ずつ接続し、前記配電系統に対して前記電源設備とは異なる蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置は、
前記期間T毎に、前記セレクタにより前記電源設備に前記蓄電装置を順次接続させ、前記電源設備に接続した蓄電装置と異なる蓄電装置に前記配電系統を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-2)~T×(N-1)後に前記配電系統に出力させる請求項9記載の情報処理装置。 - 前記蓄電装置の数をNとし、前記所定の期間をTとしたとき、
前記電力制御システムに、
前記蓄電装置と前記電源設備及び前記配電系統に対して前記蓄電装置を少なくとも1台ずつ接続するセレクタをさらに有し、
前記演算装置は、
前記期間T毎に、前記セレクタにより前記電源設備及び前記配電系統に前記蓄電装置を順次接続させ、前記期間Tにて前記蓄電装置に充電された電力量を、T×(N-1)~T×N後に前記配電系統に出力させる請求項10記載の情報処理装置。
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| JP2012186989A (ja) * | 2012-01-09 | 2012-09-27 | Masayuki Kawada | 蓄電池の充放電安定化自動ラウンドロビン式システム |
| WO2014017463A1 (ja) * | 2012-07-24 | 2014-01-30 | 株式会社日本マイクロニクス | 充放電装置 |
| JP2016005358A (ja) * | 2014-06-17 | 2016-01-12 | 三星エスディアイ株式会社Samsung SDI Co.,Ltd. | 電力アシストユニットおよび電力アシストシステム |
| JP2016059186A (ja) * | 2014-09-10 | 2016-04-21 | オムロン株式会社 | 電力制御装置、電力制御方法、プログラム、および電力制御システム |
| JP2017518017A (ja) * | 2014-05-08 | 2017-06-29 | ▲陽▼光▲電▼源股▲分▼有限公司Sungrow Power Supply Co., Ltd. | インバーター及び太陽光発電システム |
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| TWI581542B (zh) * | 2016-03-01 | 2017-05-01 | 財團法人工業技術研究院 | 電池管理系統及應用其之電池系統 |
| US10622823B2 (en) * | 2017-03-28 | 2020-04-14 | The Government Of The United States, As Represented By The Secretary Of The Army | Battery charging and discharging without interface removal |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2015188311A (ja) | 2015-10-29 |
| US20130009485A1 (en) | 2013-01-10 |
| JP6070773B2 (ja) | 2017-02-01 |
| US9379549B2 (en) | 2016-06-28 |
| JP6025197B2 (ja) | 2016-11-16 |
| JPWO2011135891A1 (ja) | 2013-07-18 |
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