WO2014076832A1 - 蓄電池制御装置及び蓄電地制御方法 - Google Patents
蓄電池制御装置及び蓄電地制御方法 Download PDFInfo
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- WO2014076832A1 WO2014076832A1 PCT/JP2012/079894 JP2012079894W WO2014076832A1 WO 2014076832 A1 WO2014076832 A1 WO 2014076832A1 JP 2012079894 W JP2012079894 W JP 2012079894W WO 2014076832 A1 WO2014076832 A1 WO 2014076832A1
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- storage battery
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- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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Definitions
- the present invention relates to a storage area control device and a storage area control method.
- a so-called microgrid system has been proposed in which a distributed power source is installed in a power system in a specific area to cover much of the power demand in that area.
- a technology is known that includes a power storage facility and controls charging and discharging of a storage battery according to a power flow from the power system (Patent Document 1). ).
- Patent Document 2 a technique for switching whether the power generation from the solar power generation apparatus is sold to the grid side or stored in the energy storage apparatus according to the voltage suppression situation that has occurred in the past on the grid side.
- the above-described useless charging / discharging causes deterioration of the performance of the storage battery and may shorten the life of the storage battery.
- An object of the present invention is to provide a storage battery control device and a storage battery control method capable of suppressing useless charging / discharging between a plurality of storage batteries provided in an electric power system.
- a storage battery control device is a device for controlling charge / discharge of a storage battery, and is installed in each of a plurality of storage batteries connected to an electric power system, and connected to a network to control other storage batteries. It has a function of communicating with the device, a function of controlling charging and discharging of each storage battery, and a function of acquiring information on a power system interconnection point flow.
- the storage battery control device acquires the charge / discharge power amount of each of the storage batteries connected to the power system and the data of the connection point power flow, and based on the charge / discharge power amount and the connection point power flow data, Power demand can be estimated.
- the storage battery control device compares the power demand with a mode determination threshold prepared in advance for determining the mode of charge / discharge operation of the storage battery based on the power demand, so that the storage battery is in the charge mode or the discharge mode. It is also possible to select which mode to operate, generate predetermined control information including the mode selected from the charge mode or the discharge mode, and control the storage location.
- At least a part of the configuration of the present invention can be realized as a computer program or a hardware circuit.
- the computer program can be distributed, for example, via a communication medium such as the Internet, a recording medium such as a hard disk or a flash memory device.
- charging / discharging between a plurality of storage batteries provided in the power system can be suppressed.
- power loss during charging, power transmission, and discharging can be reduced and energy can be used effectively.
- movement is shown.
- the structural example (2nd Example) of the table for managing an electric power charge is shown.
- the storage battery control module 110 of this embodiment is connected to an electric power system and includes a storage battery 112 and a storage battery control device 111 as described in detail below.
- the storage battery control device 111 calculates a power demand in a predetermined consumer 1 provided with a communication unit that transmits / receives data via a network and a storage battery module, and charges / discharges the storage battery 112 based on the power demand in the consumer 1
- the charging / discharging control part which controls this is provided, and control of the charging / discharging electric energy of a storage battery is possible.
- FIG. 1 shows a configuration of a power system on the low voltage system side in a predetermined customer 1.
- a consumer 1 such as a general private house, an apartment house, a commercial building, an office building, or a factory includes a storage battery module 110, an equipment load 20, and a distributed power source 30.
- the storage battery module 110, the equipment load 20, and the distributed power supply 30 are connected to the low-voltage power system 41 via a consumer distribution line 42.
- the low-voltage power system 41 is connected to a transformer such as a pole transformer 40, for example.
- the equipment load 20 is a device that consumes electric power.
- a lighting device for example, in the case of a house or the like, a lighting device, an air conditioner, a refrigerator, a washing machine, a television device, an audio device, a water heater, and the like are included.
- a factory or the like for example, a machine tool, an electric motor, a robot, an elevator, or the like.
- a distributed power source is a device that generates power.
- a solar power generation device a fuel cell, a cogeneration system, a diesel private power generation device, and the like can be given.
- the system connection point wattmeter 120 measures the power value at the connection point between the distribution line 42 of the customer 1 and the low voltage side system 41.
- the grid connection point wattmeter 120 is connected to the network CN1 and transmits the measured connection point power measurement value to the storage battery module 110.
- a power meter (including a smart meter) installed in the consumer 1 by the power company may be used.
- the storage battery control module 110 is a device in which a storage battery, a power storage control device that manages charge / discharge of the storage battery, and a communication unit that communicates with the outside are set. In the present embodiment, it is assumed that a plurality of storage battery modules 110 (1) to 110 (3) are connected to the consumer distribution line 42. The storage battery modules 110 (1) to 110 (3) are connected to each other via the communication network CN1.
- the storage battery modules 110 (1) to 110 (3) are shown, but the customer 1 may have two, four, or five or more storage battery modules. Unless otherwise distinguished, the storage battery modules 110 (1) to 110 (3) are referred to as the storage battery module 110.
- the communication unit 1111 is a circuit for communicating with other storage battery modules and the like via the communication network CN1.
- the communication network CN1 is a network for each storage battery module 110 to communicate with, for example, a wireless communication network, PLC (Power Line Communications), wireless or wired LAN (Local Area Network), PHS (Personal Handy-phone System). And so on.
- the communication unit 1111 receives later-described storage battery charge / discharge information from each of the other storage battery modules 110 via the communication network CN1. Further, the communication unit 1111 receives the connection point power measurement value from the system connection point power meter 120 via the communication network CN1. The communication unit 1111 passes the received connection point power measurement value to the charge / discharge control unit 1112. Moreover, the communication part 1111 acquires storage battery charging / discharging information from the charging / discharging control part 1112, and transmits storage battery charging / discharging information with respect to each other storage battery module via communication network CN1. Furthermore, the communication part 1111 can also transmit the below-mentioned charge remaining amount (electric storage amount) etc. to the other storage battery module 110 via the communication network CN1.
- the storage battery 112 is configured by connecting a plurality of cells having electrodes and electrolytes.
- the storage battery 112 can be composed of, for example, a lithium ion storage battery, a lead storage battery, a nickel / hydrogen storage battery, or a sodium / sulfur storage battery.
- the storage battery module 110 may include a device such as an electric double tank capacitor or a lithium ion capacitor.
- the charge / discharge control unit 1112 is a control circuit for controlling charging to the storage battery 112 and discharging from the storage battery 112.
- the charge / discharge control unit 112 can include, for example, an inverter circuit and a microcomputer circuit.
- the charging / discharging control unit 1112 converts the AC power from the low-voltage side system 41 into DC power and charges the storage battery 112.
- the charge / discharge control unit 1112 converts the DC power of the storage battery 112 into AC power and supplies it to the low-voltage side system 41.
- the charge / discharge control unit 1112 measures the amount of charge power to the storage battery 112 and the amount of power supplied to the low-voltage side system 41 (discharge power amount of the storage battery 112) as storage battery charge / discharge information, and measures the measured storage battery charge / discharge.
- Information can be transmitted from the communication unit 1111 to the other storage battery modules 110 (1) to (3) via the network CN1.
- the charge / discharge control unit 1112 charges or discharges the storage battery 112 according to the storage battery charge / discharge information of another storage battery module received from the communication unit 1111 and the connection point power measurement value of the system connection point power meter.
- the charge / discharge control unit 1112 manages the storage amount of the storage battery 112 (current battery remaining amount, SoC (State (of Charge)).
- the communication part 1111 acquires the charge / discharge electric energy of each other storage battery module 110 (S201). This process is periodically executed at a predetermined cycle.
- the communication unit 1111 transmits the acquired charge / discharge power amount of each storage battery module 110 to the charge / discharge control unit 1112.
- the charging / discharging electric energy of each storage battery module 110 treats charging power as a negative value and discharging power as a positive value.
- As a method of acquiring the charge / discharge power amount from each storage battery module 110 there is a method in which the storage battery module 110 transmits the charge / discharge power amount at a predetermined time interval and the communication unit 1111 receives the charge / discharge power amount.
- the charge / discharge power amount is the charge / discharge power amount of the storage battery that is planned or implemented at a predetermined time point.
- the storage battery module 110 transmits the charge / discharge power amount at a predetermined time interval, the actual charge / discharge power amount at the time of transmission is transmitted.
- the communication unit 1111 acquires the power measurement value of the system connection point from the system connection point wattmeter 120, and transmits the acquired system connection point power to the charge / discharge control unit 1112 (S202).
- the charge / discharge control unit 1112 calculates the total value of the charge / discharge power amount of each storage battery module acquired in step S201 and the grid connection point power amount acquired in step S202 (S203). This total value is a value (power value) of actual power demand consumed or generated by the customer 1.
- This actual power value is called estimated actual demand in this embodiment.
- the estimated actual demand is a positive value
- the power consumption amount in the customer 1 exceeds the power generation amount, indicating that the power is insufficient.
- the estimated actual demand is a negative value
- the power generation amount in the customer 1 exceeds the consumption amount, indicating that the power is surplus.
- the value of the estimated actual demand is zero, the power consumption amount and the power generation amount in the customer 1 are the same amount, and the power supply and demand are in agreement.
- the charge / discharge control unit 1112 determines whether the estimated actual demand is greater than 0 (S204). When the estimated actual demand is greater than 0 (S204: Yes), the process proceeds to step S205. When the estimated actual demand is not greater than 0 (S204: No), the process proceeds to step S206.
- the “discharge mode” is selected (S205).
- the “charging mode” is selected (S206).
- the discharge mode is a mode in which the discharge control of the storage battery 112 is possible.
- the charging mode is a mode in which charging of the storage battery 112 can be controlled. More specifically, the discharge mode is a mode in which charge control of the storage battery 112 is prohibited and discharge control or control without charge / discharge is possible.
- the charge mode is a mode in which discharge control of the storage battery 112 is prohibited and charge control or control without charge / discharge is possible.
- the discharge mode can be defined as a mode for prohibiting charging, and the charge mode can be defined as a mode for prohibiting discharge.
- the charge / discharge control unit 1112 performs charge / discharge control of each storage battery 112 according to the storage battery control mode selected in step S205 or step S206 (S207).
- FIG. 3 is a flowchart showing the operation of the storage battery module 110. Although this process is performed by the charge / discharge control unit 1112 of the storage battery control device 111, the main component of the operation will be described as the storage battery module 110 for easy understanding.
- the storage battery module 110 acquires the SoC of the storage battery 112 (S302).
- the storage battery module 110 determines the control of the storage battery 112 based on the storage battery control mode and the SoC with reference to the charge / discharge operation management table T301 stored in advance (S303).
- the charge / discharge operation management table T301 is a table for determining the charge / discharge operation of the storage battery 112, and includes, for example, a mode column C301, an SoC column C302, and an operation column C303.
- the mode column C301 stores the value of the charge / discharge control mode. As already described, the mode value includes a charge mode or a discharge mode.
- the SoC column C302 the SoC of the storage battery 112 is stored.
- the operation of the storage battery 112 is stored in the operation column C303.
- the operation of the storage battery includes charging, discharging, and doing nothing (“-” is set when nothing is done).
- the storage battery control mode is the charge mode
- the storage battery 112 does nothing. In this case, since the storage battery 112 has already stored sufficient electric energy, it is not necessary to charge it. Further, since the charging mode is designated, the storage battery 112 is prohibited from discharging. Therefore, when the charging mode is designated and the SoC is higher than the predetermined value, the storage battery module 110 stands by without being charged or discharged.
- the storage battery control mode is the charging mode
- the storage battery 112 performs a charging operation if the SoC is equal to or less than a predetermined value. This is because charging is permitted in the charging mode, and sufficient electric energy is not stored in the storage battery 112. Therefore, the storage battery module 110 stores the power generated by the distributed power supply 30 or the power from the low-voltage side system 41 in the storage battery 112.
- the storage battery control mode is the discharge mode
- the SoC is higher than a predetermined value
- the storage battery 112 is discharged. This is because discharging is permitted in the discharge mode, and the storage battery 112 stores sufficient electrical energy.
- the electric power discharged from the storage battery 112 is supplied to the equipment load 20.
- the storage battery control mode is the discharge mode, if the SoC is less than or equal to a predetermined value, the storage battery 112 stands by without being charged or discharged. This is because, in the discharge mode, discharge is permitted, but the storage battery 112 does not store sufficient electrical energy.
- the storage battery module 110 estimates the actual demand of the customer 1, selects the storage battery control mode, selects the charging mode when power is surplus, and if the power is insufficient Select the discharge mode. And storage battery 112 is controlled according to storage battery control mode and SoC.
- the storage battery control mode is “discharge mode”
- the storage battery module 110 that is charging the storage battery 112 stops charging. Therefore, in the consumer 1, there are only the storage battery module 110 that is being discharged and the storage battery module 110 that is neither being charged nor discharged. Therefore, it is possible to suppress the occurrence of a situation in which charging and discharging are simultaneously performed between the storage battery modules 110 (1) to 110 (3) connected to the common customer distribution line 42.
- the storage battery module 110 that is discharging the storage battery 112 stops discharging. Therefore, in the consumer 1, the storage battery module 110 that is charging and the storage battery module that is neither charged nor discharged. Only 110. Therefore, it is possible to suppress the occurrence of a situation in which charging and discharging are performed simultaneously between the storage battery modules 110 (1) to 110 (3) connected to the common customer distribution line 42.
- the present embodiment it is possible to suppress generation of useless power transfer in which the electric power discharged from one storage battery module 110 is charged to the other storage battery module 110, and to effectively use the storage battery module 110. Can be used, and usability increases. Furthermore, in this embodiment, useless charging / discharging can be suppressed, so that the life of the storage battery modules 110 (1) to 110 (2) can be suppressed from decreasing.
- each storage battery module 110 generates the storage battery control mode when the value of the charge / discharge power changes in any of the storage battery modules 110 (1) to 110 (3). It is good also as composition which performs.
- the storage battery control device 111 records the amount of charge / discharge power transmitted last by each of the storage battery modules 110 (1) to 110 (3) in the memory. And when the charging / discharging electric energy which one certain storage battery module 110 transmitted is received, the process of FIG. 2 is started with the reception as a trigger. During the processing, the total value of the latest charge / discharge power amount received from one storage battery module 110 and the charge / discharge power amount (value stored in the memory) of other storage battery modules 110 is used as the total battery power. Can be used.
- Each storage battery module 110 may transmit the charge / discharge power amount to another storage battery module 110 at different periods. Therefore, using the memory for storing the last charge / discharge power amount received from each of the storage battery modules 110 (1) to 110 (3), any one of the storage battery modules 110 has transmitted the latest charge / discharge power amount. The charge / discharge control information is generated at the same timing.
- the second embodiment will be described with reference to FIGS.
- Each of the following embodiments including this embodiment corresponds to a modification of the first embodiment. Therefore, the difference from the first embodiment will be mainly described.
- the charge / discharge operation can be determined with reference to the power charge.
- Electricity charges may be set to different values depending on, for example, the time of day or season.
- a fee is set for each time zone, and evaluation is performed when the fee is high and when the fee is low.
- FIG. 5 is an example of a power rate management table T501 used in the storage battery control device 111 of the present embodiment.
- the power rate management table T501 includes, for example, a time zone column C501, a rate column C502, and an evaluation column C503.
- the time zone column C501 stores a time zone in which power is consumed.
- the charge column C502 stores a power charge unit price in the time zone.
- the evaluation column C503 stores the evaluation result of the power rate.
- the case where the evaluation result indicates that the charge is high is a state where the power charge is higher than a predetermined reference charge.
- the case where the charge is low is a state where the power charge is equal to or less than a predetermined reference charge.
- the evaluation when the reference charge is 15 yen / kWh is as shown in C503.
- the determination process of the charge / discharge operation (S303) )
- the evaluation of the power rate at the time when the charge / discharge operation is determined is determined with reference to the power rate management table T501.
- the above fee evaluation is merely an example, and a case where the fee is classified into two states, that is, a high case and a low case, has been described.
- FIG. 4 is an example of the charge / discharge operation management table T401 used in the storage battery control device 111 of this embodiment.
- the storage battery control device 111 can determine the operation of the storage battery 112 based on the mode value specified in the storage battery control mode, the power rate evaluation, and the SoC of the storage battery 112.
- the charge / discharge operation management table T401 includes, for example, a mode column C401, an SoC column C402, an electricity bill column C403, and an operation column C404.
- the mode column C401 stores the value of the storage battery control mode.
- the mode value includes a charge mode or a discharge mode.
- the SoC of the storage battery 112 is stored.
- SoC is managed by distinguishing it into four states.
- the first state (F) is a state in which 80% or more of electrical energy (electric power) is stored in the storage battery 112, for example.
- the second state (H) is a state in which electrical energy is stored in the storage battery 112 in a range of, for example, 50% to less than 80%.
- the third state (L) is a state where electrical energy is stored in the storage battery 112, for example, less than 50% to 20% or more.
- the fourth state (E) is a state where electrical energy is stored in the storage battery 112, for example, less than 20%.
- the above numerical range is only an example and is not limited to the above numerical range. Although the case of distinguishing between four states has been described, a configuration in which the state is managed by distinguishing three or more states may be used.
- the evaluation of the corresponding charge is stored in the electricity charge evaluation column C403.
- it evaluates to two states, when an electricity bill is high and when it is low.
- the operation of the storage battery 112 is stored in the operation column C404.
- the operation of the storage battery includes charging, discharging, and doing nothing (“-” is set when nothing is done). Further, in the case of a charging operation, it is possible to specify how far to charge. In the case of a discharge operation, it is possible to specify how far to discharge. “Charging (up to F)” in FIG. 4 means charging until the SoC changes from the current state to the first state (F). “Discharge (up to E)” means that the SoC discharges from the current state to the fourth state (E).
- the storage battery 112 waits without being charged or discharged regardless of the electric charge level. This is because the storage battery 112 has already stored sufficient electric energy.
- the storage battery 112 waits without doing anything.
- the storage battery 112 can be charged, but the charge for electricity is high, so the charging is postponed.
- the storage battery 112 is charged to the first state (F).
- the storage battery 112 waits without doing anything. Yes, if you want to recharge, but because of the high electricity bill, you will not see it.
- the storage battery 112 When the charging mode is designated and the SoC is in the third state (L) and the electricity charge is low, the storage battery 112 is charged until it reaches the first state (F). Store as much electricity as possible with low electricity bills.
- the storage battery 122 is charged until it reaches the third state (L). Since electricity charges are high, only the minimum necessary electricity is stored.
- the storage battery 122 is charged until the first state (F) is reached. This is to save as much electricity as possible with low electricity charges.
- the storage battery 112 When the discharge mode is designated and the SoC is in the first state (F), the storage battery 112 is discharged until it reaches the fourth state (E) regardless of the electric charge level.
- the storage battery 112 is discharged until it reaches the fourth state (E). As described above, while the electricity bill is high, the amount of power purchased from the grid is reduced as much as possible to reduce the economic burden on the user.
- the storage battery 112 stands by without doing anything. Discharge is possible because it stores a relatively sufficient amount of electrical energy. It is economically beneficial for the user to discharge at a time when electricity charges are high.
- the storage battery 112 is discharged to the fourth state (E). This is to reduce the economic burden on the user by discharging as much as possible while the electricity bill is high.
- the storage battery 112 does nothing. Similarly to the above, it is because it is more economical for the user to discharge in a time zone with a higher electricity rate than in a time zone with a lower electricity rate.
- the storage battery 112 does nothing regardless of the electric charge. This is because the charging operation is prohibited in the discharge mode, and the remaining amount of the storage battery 112 is hardly left.
- each storage battery control device 111 can determine the operation of the storage battery 112 in consideration of the electricity bill, so that the user convenience is improved.
- a third embodiment will be described with reference to FIG.
- a value other than 0 is used as the mode discrimination threshold DP used for selecting either the charge mode or the discharge mode.
- FIG. 6 is a flowchart showing a storage battery charge / discharge control process according to this embodiment.
- the estimated actual demand is compared with the mode discrimination threshold DP.
- the mode discrimination threshold DP for example, a moving average value of past actual values of the customer 1 can be used.
- the discharge mode is selected (S205), and when the estimated actual demand is not larger than the threshold DP (S204A: No), the charging mode is selected. (S206).
- the power value of the grid connection point of the customer can be controlled near the threshold value DP.
- the mode value is selected depending on whether or not the estimated actual demand in the customer 1 is greater than zero.
- the storage battery module 110 is operated in the always discharge mode.
- this can be dealt with by setting a value other than 0 to the threshold DP for determining which of the charging mode and the discharging mode is selected. For example, when a certain threshold value such as 10 kWh is set, the grid connection point power close to the threshold value DP can be controlled by charging / discharging the storage battery 112. Preferably, if the moving average value of the past actual value of the estimated actual demand is used as the threshold value DP, it is possible to control such that power fluctuation at the grid connection point is reduced.
- the value of the mode discrimination threshold DP is controlled according to the amount of power generated by the distributed power supply 30.
- FIG. 7 is a flowchart showing a storage battery charge / discharge control process according to this embodiment.
- the storage battery control device 111 determines whether the power generation amount of the distributed power supply 30 exceeds the power generation amount threshold Th (S208). Although illustration is omitted, the storage battery control device 111 is configured to be able to acquire the power generation amount of the distributed power supply 30 directly or indirectly.
- the storage battery control device 111 sets the value of the mode discrimination threshold DP to 0 (S209).
- the storage battery control device 111 sets a predetermined value W1 (> 0) as the value of the mode determination threshold DP (S210).
- This embodiment which is configured in this way, also has the same operational effects as the second embodiment. Furthermore, in this embodiment, when the power generation amount of the distributed power source 30 exceeds the threshold Th, the value of the mode determination threshold DP is set to 0, and when the power generation amount of the distributed power source 30 does not exceed the threshold Th, The mode discrimination threshold DP is set to W1.
- the distributed power source 30 when the distributed power source 30 is provided and the power generation exceeds the threshold Th, the distributed power source 30 is not provided, or the distributed power source 30 cannot sufficiently generate power.
- the charge / discharge control of the storage battery module 110 can be changed.
- the distributed power source 30 is easily affected by the weather, such as a solar power generation device or a wind power generation device, the plurality of storage battery modules 120 can be appropriately managed.
- the distributed power source 30 is a fuel cell, a cogeneration system, or a diesel in-house power generation device, each storage battery module 110 is appropriately controlled even when the power generation capacity is reduced or lost due to fuel exhaustion or failure. Can do.
- the storage battery modules 10A, 10B respectively possessed by the plurality of consumers 1A, 1B are managed as the same group so that the charge / discharge operation can be controlled.
- FIG. 8 shows two consumers 1A and 1B, but it can also handle three or more consumers.
- the customer 1A includes, for example, an equipment load 20A, a distributed power source 30A, a storage battery module 10A, and a smart meter 130A.
- the smart meter 130A means a power meter having at least a communication function.
- the other consumer 1B also includes an equipment load 20B, a distributed power source 30B, a storage battery module 10B, and a smart meter 130B.
- Each customer 1 ⁇ / b> A, 1 ⁇ / b> B is connected to the pole transformer 51 via the low voltage distribution system 52 and connected to the high voltage distribution system 50 via the pole transformer 51.
- the storage battery modules 10A, 10B installed in each customer are connected via a communication network CN3 so as to be capable of bidirectional communication.
- the smart meters 130A and 130B are connected to the smart meter server 131 via the communication network CN2.
- the smart meter server 131 collects the power consumption of each customer measured by the smart meters 130A and 130B of each customer, and further uses the power consumption of each customer to the storage battery module of each customer via the communication network CN3.
- the communication networks CN2 and CN3 may be configured by, for example, a wireless LAN, PLC, optical communication, the Internet, or the like.
- each consumer has one storage battery module, but may have a configuration having two or more storage battery modules.
- the smart meter server 131 is provided, for example, for the electric power company to collect the amount of electric power used by each consumer in order to calculate the electric power charge.
- the communication network CN2 is a private network or communication network of the electric power company.
- CN3 is configured by the Internet.
- Storage battery modules 10A and 10B include communication units 101A and 101B, charge and discharge control units 102A and 102B, and storage batteries 103A and 103B, respectively.
- the communication units 101A and 101B are circuits for communicating with other storage battery modules and the like via the communication network CN2.
- the communication network CN2 is a network through which each storage battery module communicates.
- a wireless communication network for example, a PLC (Power Line Communications), a wireless or wired LAN (Local Area Network), a PHS (Personal Handy-phone System), etc. It is configured as follows.
- the communication units 101A and 101B receive storage battery charge / discharge information described later via the communication network CN2. Further, the communication unit receives the power consumption measurement value of the consumer from the smart meter server 131 via the communication network CN2. The communication units 101A and 101B pass the received consumer power consumption measurement values to the charge / discharge control units 102A and 102B. Moreover, communication part 101A, 101B acquires storage battery charging / discharging information from charging / discharging control part 102A, 102B, and transmits storage battery charging / discharging information with respect to another storage battery module via communication network CN2.
- the storage batteries 103A and 103B are storage batteries capable of charging and discharging electric power having the same function as the storage battery 112 described in FIG.
- the charge / discharge control units 102A and 102B have the same functions as the charge / discharge control unit 1112 described in FIG. 1, and control for controlling charging to the storage batteries 103A and 103B and discharging from the storage batteries 103A and 103B. Circuit.
- the charge / discharge control units 102A and 102B can be configured to include, for example, an inverter circuit and a microcomputer circuit.
- the charging / discharging control units 102A and 102B convert the AC power from the low-voltage side system 51 into DC power and charge the storage batteries 103A and 103B.
- the charge / discharge control units 102A and 102B convert the DC power of the storage batteries 103A and 103B into AC power and supply the AC power to the low-voltage system 51.
- the charge / discharge control units 102A and 102B measure the amount of charge power to the storage batteries 103A and 103B and the amount of power supplied to the low-voltage system 51 (discharge power amount of the storage batteries 102A and 102B) as storage battery charge / discharge information.
- the measured storage battery charge / discharge information can be transmitted from the communication units 101A and 101B to the other storage battery modules 10B and 10A via the network CN2.
- the charge / discharge control units 102A and 102B are connected to the storage batteries 103A and 103B according to the storage battery charge / discharge information of other storage battery modules received from the communication units 101A and 101B and the total consumer power consumption transmitted from the smart meter server described later. Charge or discharge.
- the charge / discharge control units 102A and 102B manage the amount of electricity stored in the storage batteries 103A and 103B (current battery level, SoC (State of Charge)).
- the smart meter server 131 receives the power consumption amount of each customer transmitted from the smart meters 130A and 130B installed in each customer 1A and 1B via the communication network CN2, and the consumption of each customer received.
- the total consumer power consumption which is the total value of power, is calculated, and the value is transmitted to the storage battery module of each consumer via the network CN3.
- the charge / discharge control units 102A and 102B use the difference obtained by subtracting the charge / discharge power of each storage battery module from the total consumer power consumption as the estimated actual demand, determine the charge / discharge mode of the storage battery, and perform the charge / discharge control of the storage battery. .
- the method of charge / discharge control of the storage battery is the same as in the first embodiment, for example.
- This embodiment controls the charging / discharging operation of each storage battery module 103 provided in a different consumer, as in the first embodiment. Thereby, in a present Example, a some storage battery module can be appropriately controlled between the consumers in a group.
- a sixth embodiment will be described with reference to FIG.
- a plurality of storage battery modules 10A and 10B distributed among consumers can be grouped to control the charge / discharge operation.
- the smart meter server 131 calculates the total power consumption of the customer after obtaining the power consumption of the customers 1A and 1B from the smart meters 130A and 130B provided in the consumers 1A and 1B. The value was transmitted to the storage battery modules 10A and 10B of each consumer.
- the storage battery modules 10A and 10B also calculate the estimated actual demand by transmitting the storage battery charge / discharge information to the other storage battery modules 10B and 10A.
- the actual demand is calculated in the consumers 1A and 1B, the actual demand is transmitted to the storage battery modules 10B and 10A, and the actual demand of each consumer is totaled to obtain the total actual demand. calculate.
- the smart meter 130A is removed from the customer 1A, and the actual demand processing unit 140A is newly provided. Similarly, the smart meter 130B is removed from the consumer 1B, and an actual demand processing unit 140B is provided.
- the actual demand processing units 140A and 140B transmit the actual demand of the consumers 1A and 1B to the storage battery modules 10A and 10B via the communication network CN3.
- the actual demand is a value obtained by subtracting the storage battery charge / discharge power of the storage battery module of the consumer from the power used by the consumer.
- Actual demand processing units 140A and 140B receive storage battery charge / discharge power from storage battery modules 10A and 10B, and further receive power usage from wattmeter PM (signed only on consumer 1B side).
- the power meter PM measures the power used by each consumer 1A, 1B and transmits the measured power used to the actual demand processing units 140A, 140B.
- Each storage battery module 10A, 10B does not transmit the storage battery charge / discharge power to the other storage battery modules 10B, 10B via the network CN3, but to the actual demand processing units 140A, 140B installed in each consumer 1A, 1B.
- the transmission point is different from the fifth embodiment.
- Actual demand processing units 140A and 140B are provided for each customer 1A and 1B.
- the actual demand processing units 140A and 140B calculate the actual demand by subtracting the storage battery charge / discharge power from the power used by the installed consumers, and transmit it to the storage battery modules 10A and 10B via the network CN3.
- each of the storage battery modules 10A and 10B determines the charge / discharge mode of the storage battery by using the total actual demand that is the sum of the actual demand of each consumer, and charges the storage battery.
- Implement discharge control The method of charge / discharge control of the storage battery is the same as in the first embodiment, for example.
- This embodiment which is configured in this way, also exhibits the same operational effects as the fifth embodiment. Further, in the present embodiment, since the actual demand processing units 140A and 140B are provided in the consumers 1A and 1B, the storage battery module in the consumer is controlled even in an environment without a so-called smart meter or smart meter server. Is possible.
- 1, 1A, 1B Customer 20, 20A, 20B: Equipment load 30, 30A, 30B: Distributed power supply 111: Storage battery control device 110, 10A, 10B: Storage battery module 1112, 102A, 102B: Charge / discharge control unit 140A, 140B : Actual demand processing department
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Abstract
Description
本実施例では、例えば、前記蓄電池モジュール110が所定の時間間隔で充放電電力量を送信する方式の場合は、送信実行時の、実際の充放電電力量を送信する。
充電モードとは、蓄電池112の放電制御を禁止し、充電制御もしくは充放電をしない制御が可能なモードである。放電モードとは、充電を禁止するモードであると定義可能であり、充電モードとは、放電を禁止するモードであると定義可能である。
各蓄電池モジュール110は、それぞれ別々の周期で、充放電電力量を他の蓄電池モジュール110に送信する可能性がある。従って、各蓄電池モジュール110(1)~110(3)から受信した最後の充放電電力量を記憶するためのメモリを用い、各蓄電池モジュール110のうちいずれかが最新の充放電電力量を送信してきたタイミングで、充放電制御情報を生成する。
本実施例の蓄電池制御装置111では、充放電動作の決定処理(S303)において、電力料金管理テーブルT501を参照して充放電動作を決定する時刻の電力料金の評価を決定する。以上の料金の評価は一例に過ぎず、高い場合、低い場合の2つの状態に区別する場合を述べたが、3つ以上の状態に区別して管理する構成でもよい。
充放電制御部102A、102Bは、通信部101A、101Bから受信する他の蓄電池モジュールの蓄電池充放電情報と、後述のスマートメータサーバから送信される需要家総消費電力量に従って、蓄電池103A、103Bに充電または放電させる。充放電制御部102A、102Bは、蓄電池103A、103Bの蓄電量(現在の電池残量、SoC(State of Charge))を管理している。
充放電制御部102A、102Bは、需要家総消費電力量から各蓄電池モジュールの充放電電力を引いた差分を推定実需要とし、蓄電池の充放電モードを決定し、蓄電池の充放電制御を実施する。蓄電池の充放電制御の方法は、例えば第1実施例と同様である。
20,20A,20B:設備負荷
30,30A,30B:分散電源
111:蓄電池制御装置
110,10A,10B:蓄電池モジュール
1112,102A,102B:充放電制御部
140A、140B:実需要処理部
Claims (13)
- 蓄電池の作動を制御する蓄電池制御システムであって、
電力系統に接続される複数の蓄電池と、
前記複数の蓄電池毎に設置され相互に通信可能に接続される複数の蓄電池制御装置とを備え、
前記蓄電池制御装置は、
前記複数の蓄電池に設けられる所定の需要家における電力需要を取得し、
前記所定の需要家における電力需要に基づいて、前記管理している蓄電池の充放電を制御する、
蓄電池制御システム。 - 前記蓄電池制御装置は、
前記複数の蓄電池の充放電電力量を取得し、かつ、
前記所定の需要家と前記電力系統との連系点における電力潮流データを取得し、
前記充放電電力量と前記電力潮流データとに基づいて、前記所定の需要家における前記電力需要を推定する、
請求項1に記載の蓄電池制御システム。 - 前記蓄電池制御装置は、
充放電動作のモードを判別するために予め用意されるモード判別用閾値と、前記電力需要とを比較することで、前記複数の蓄電池毎に充電モードまたは放電モードのいずれで動作するかを選択し、
前記充電モードまたは前記放電モードのうち選択したモードで前記蓄電池の充放電制御を行う、
請求項2に記載の蓄電池制御システム。 - 前記蓄電池制御装置は、他の蓄電池制御装置と通信するための通信部と、前記蓄電池の充放電動作を制御するための充放電制御部とをそれぞれ備え、
前記充放電制御部は、前記蓄電池の充放電電力を他の蓄電池制御装置に送信し、他の蓄電池制御装置から受信する充放電電力と、前記蓄電池の充電残量とに基づいて、前記蓄電池の充放電動作を制御する、
請求項3に記載の蓄電池制御システム。 - 前記複数の蓄電池のうち前記充電モードが選択された蓄電池では、充電動作が許可されており、
前記複数の蓄電池のうち前記放電モードが選択された蓄電池では、放電動作が許可される、
請求項4に記載の蓄電池制御システム。 - 前記蓄電池制御装置は、
前記充放電電力量と前記電力潮流データとの差分を、前記所定の需要家における前記電力需要として推定し、
前記モード判別用閾値として、前記所定の需要家における過去の電力需要の実績値から得られる実績関連値を用いる、
請求項5に記載の蓄電池制御システム。 - 前記所定の需要家は、自家発電装置を備えており、
前記蓄電池制御装置は、前記自家発電装置の発電量に応じて、前記モード判別用閾値を選択する、
請求項6に記載の蓄電池制御システム。 - 前記蓄電池制御装置は、
前記発電量が予め設定される所定の発電量閾値を超えたか否か判定し、
前記発電量が前記発電量閾値を超えたと判定した場合は、前記モード判別用閾値の値として第1の値を選択し、
前記発電量が前記発電量閾値を超えていないと判定した場合は、前記第1の値よりも高く設定される前記実績関連値を選択する、
請求項7に記載の蓄電池制御システム。 - 前記充放電制御部は、前記選択モードに従って前記蓄電池の充放電動作を制御することが予め設定されている場合、前記選択モードと前記蓄電池の充電残量とに基づいて、前記蓄電池の充放電動作を制御する、
請求項1乃至8のいずれか一項に記載の蓄電池制御システム。 - 前記所定の需要家は複数存在し、
前記複数の蓄電池は、それぞれ異なる所定の需要家に設けられている、
請求項1乃至8のいずれか一項に記載の蓄電池制御システム。 - 前記蓄電池制御装置は、前記複数の蓄電池のそれぞれから、前記複数の蓄電池の充放電電力量と前記所定の需要家における電力潮流データとの差分を、前記所定の需要家における前記電力需要として取得する、
請求項1に記載の蓄電池制御システム。 - 前記充放電制御部は、前記蓄電池制御装置から受信する前記選択したモードと、前記蓄電池から取得する充電残量と、前記電力系統の電気料金に関する情報とに基づいて、前記蓄電池の充放電動作を制御する、
請求項4に記載の蓄電池制御システム。 - 電力系統に接続される複数の蓄電池の作動を蓄電池制御装置を用いて制御するための蓄電池制御方法であって、
前記蓄電池制御装置は、
前記複数の蓄電池毎に設置され、
前記複数の蓄電池の設けられる所定の需要家における電力需要を取得し、
前記所定の需要家における電力需要に基づいて、前記複数の蓄電池の充放電を制御するための情報を、複数の蓄電池制御装置間で相互に送受信する、
蓄電池制御方法。
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