WO2013046656A1 - Système de charge/décharge - Google Patents

Système de charge/décharge Download PDF

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Publication number
WO2013046656A1
WO2013046656A1 PCT/JP2012/006135 JP2012006135W WO2013046656A1 WO 2013046656 A1 WO2013046656 A1 WO 2013046656A1 JP 2012006135 W JP2012006135 W JP 2012006135W WO 2013046656 A1 WO2013046656 A1 WO 2013046656A1
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WO
WIPO (PCT)
Prior art keywords
storage battery
instruction
soc
charge
discharge
Prior art date
Application number
PCT/JP2012/006135
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English (en)
Japanese (ja)
Inventor
健司 泰間
Original Assignee
三洋電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2011211279A external-priority patent/JP2014233096A/ja
Priority claimed from JP2011211280A external-priority patent/JP2014233097A/ja
Application filed by 三洋電機株式会社 filed Critical 三洋電機株式会社
Publication of WO2013046656A1 publication Critical patent/WO2013046656A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • 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
    • 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
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H02J7/00716—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current in response to integrated charge or discharge current
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • H02J7/04—Regulation of charging current or voltage
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/10—The dispersed energy generation being of fossil origin, e.g. diesel generators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to a charge / discharge system for a storage battery.
  • An ancillary function refers to a function of maintaining power quality such as frequency stabilization of power transmitted and distributed by the power system.
  • the frequency maintenance function is taken up as a representative example of the ancillary function.
  • the power transmitted and distributed has the property that the frequency decreases instantaneously when the demand exceeds the supply, and the frequency increases instantaneously when the supply exceeds the demand. Therefore, it is conceivable to adjust the output so as to increase the power generation output when the frequency decreases and to decrease the power generation output when the frequency increases.
  • Storage batteries are required to be used within the SOC (State Of Charge) range from the viewpoint of life. The same applies when the storage battery is used for ancillary service.
  • SOC State Of Charge
  • the SOC is an index indicating the ratio of the remaining capacity to the full charge capacity.
  • the storage battery operation management entity receives a charge instruction or discharge instruction from the power system operation management entity.
  • This instruction is issued in various patterns according to load fluctuations and power generation conditions.
  • the charge instruction and the discharge instruction may be issued in a well-balanced manner, the charge instruction may be continued many times, or the discharge instruction may be continued many times.
  • the storage battery operation management entity must in principle receive all instructions from the power system operation management entity. If the instructions are ignored, the ancillary function will be weakened, and the stable supply of high-quality power will be hindered.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a technique for suppressing a decrease in an ancillary function while protecting a storage battery in an ancillary service using the storage battery.
  • a charge / discharge system includes a storage battery that can be charged and discharged from an electric power system, and a control device that controls charging / discharging of the storage battery.
  • the control device charges or discharges the storage battery so that the SOC of the storage battery becomes a predetermined appropriate value by the start time of the period to be charged / discharged between the power system and the storage battery according to an instruction from the power system operator. To do.
  • FIG. 1 is a diagram showing an overall configuration of a power supply system 500.
  • the power supply system 500 has a configuration in which a plurality of power plants 30, a plurality of charge / discharge systems 100, a plurality of consumers 40, and a system operation device 200 are connected to the power system 50.
  • the power transmission system and the distribution system are not distinguished from each other and are collectively referred to as a power system 50.
  • the entire power supply system 500 is basically managed by a local monopoly electric power company, and retailing of electric power by non-electric power companies is not permitted (as of September 2011).
  • Each local power company is responsible for supplying power to the local customers 40.
  • Japanese electric power companies supply high-quality and stable power to consumers 40 by implementing frequency control services.
  • PJM Pulnsylvania New Jersey Maryland
  • the PJM has a wholesale power exchange (PX) and an independent system operator (ISO).
  • PX wholesale power exchange
  • ISO independent system operator
  • a power system centered on a transmission line is owned by an electric power company, and is operated by ISO.
  • PJM operates a capacity market, a wholesale power market, a frequency adjustment market, and a financial power transmission rights market.
  • the power plant 30 connected to the power system 50 includes various types of power plants such as thermal power, nuclear power, hydropower, wind power, and solar power.
  • the energy sources of thermal power plants are mainly coal, gas and oil.
  • many of the main power plants are owned by local monopoly electric power companies.
  • many independent power producers (IPPs) produce power.
  • the locations are distributed and owned.
  • the grid operation device 200 is a device managed by an electric power company or ISO.
  • the grid operation device 200 detects a load fluctuation (that is, a fluctuation in demand for power) of the power system 50, and issues an instruction for maintaining the supply and demand balance of the entire power system 50 to at least one of the power plant 30 and the charge / discharge system 100.
  • the grid frequency fluctuates when the supply-demand balance is lost. If the difference between the system frequency and the reference frequency exceeds ⁇ 0.2 Hz, there is a possibility that some devices on the consumer 40 side will be adversely affected. In addition, when the difference between the system frequency and the reference frequency reaches several percent, there is a possibility that problems such as turbine blade resonance and generator shaft twist may occur in the generator.
  • the grid operation device 200 can instruct the power plant 30 via the communication network to adjust the power generation output according to the load fluctuation. Specifically, when the power demand exceeds the power supply, the power generation output is instructed, and when the power demand falls below the power supply, the power generation output is instructed to decrease. Since nuclear power generation and hydropower generation are difficult to adjust the output in a short time, the output adjustment by the power plant is mainly performed by the thermal power plant.
  • the grid operation device 200 can instruct the charge / discharge system 100 via the communication network to discharge the power system 50 from the storage battery or charge the storage battery from the power system 50 according to the load fluctuation. Specifically, when the power demand exceeds the power supply, the power system 50 is instructed to discharge from the storage battery, and when the power demand falls below the power supply, the power system 50 is instructed to charge the storage battery.
  • PJM has both a frequency adjustment market based on automatic power generation control (AGC) and a frequency adjustment market based on charge / discharge control.
  • AGC automatic power generation control
  • IPPs that have only generators that are difficult to adjust their output. That is, by paying for the frequency control service traded in the frequency adjustment market, the capital investment cost can be suppressed.
  • control of the system frequency by the charge / discharge system 100 will be described in this specification.
  • an explanation will be given of an example in which there is a business operator (hereinafter referred to as a power storage business operator) whose purpose is to increase profits in the frequency adjustment market, and the power storage business operator manages the charge / discharge system 100 and provides a frequency control service.
  • the system operation entity that manages the system operation apparatus 200 is different from the frequency service provision entity.
  • FIG. 2 is a diagram for explaining the charge / discharge system 100 according to the embodiment of the present invention.
  • the charge / discharge system 100 includes a storage battery 10, a switch circuit 11, a bidirectional AC-DC converter 12, a resistor R1, a control device 20, and a console terminal device 70.
  • the solid line arrows indicate the flow of electric power
  • the broken line arrows indicate the flow of control signals.
  • the storage battery 10 is a battery that can be charged and discharged from the power system 50 to the power system 50.
  • a lithium ion battery, a nickel metal hydride battery, a lead battery, or the like is employed as the storage battery 10.
  • the switch circuit 11 is provided between the storage battery 10, the bidirectional AC-DC converter 12, and the resistor R1.
  • the switch circuit 11 discharges the storage battery 10 from the storage system 10 via the bidirectional AC-DC converter 12 to the electric power system 50 in accordance with an instruction from the control device 20 or from the electric power system 50 via the bidirectional AC-DC converter 12.
  • the storage battery 10 is charged or a current is passed from the storage battery 10 to the resistor R1 or switched.
  • the bidirectional AC-DC converter 12 converts the AC power supplied from the power system 50 into DC power and supplies it to the storage battery 10 or the DC power supplied from the storage battery 10 according to an instruction from the control device 20. Is converted into AC power and supplied to the power system 50.
  • the resistor R1 releases the energy supplied from the storage battery 10 to the atmosphere as Joule heat.
  • the system operation device 200, the control device 20, and the console terminal device 70 are connected to the communication network 60 (for example, the Internet). Further, a frequency control service exchange system (not shown) is also connected. In the present embodiment, as in the case of PJM, it is assumed that there are two types of frequency control service markets, a one-day market and a real-time market.
  • the PJM one-day market is operated as follows.
  • the power storage company bids on an hourly basis from 0:00 to 18:00 (excluding 12 to 16:00) the day before the frequency control service provision date.
  • the minimum unit for bidding is 0.5 MW.
  • the successful bid result is notified at 20:00 on the day before the service provision date.
  • the settlement price is determined not at the bid price but at the market price.
  • the market price is the price at which the supply and demand match at the exchange.
  • the demand is calculated from the predicted value of power demand on the day, the scheduled value of power supply on the day, and the like.
  • the grid operation organization can secure auxiliary power for frequency control in the market one day ago.
  • the power supply-demand balance may expand more than expected.
  • a real-time market will be established and additional participants in the frequency control service will be recruited.
  • the real-time market will not be opened if the power supply / demand balance is within the expected range.
  • the system operation device 200 sends a charge instruction signal or a discharge instruction signal via the communication network 60 to the control device 20 of the charge / discharge system 100 that provides the frequency control service at that time according to fluctuations in the power supply / demand balance. Send.
  • the grid operation apparatus 200 periodically transmits a charge instruction signal or a discharge instruction signal (for example, once every 2 seconds or 4 seconds). Note that, in a cycle in which charging and discharging are not necessary, a signal may not be transmitted, or a standby instruction signal may be transmitted.
  • the grid operation device 200 monitors the power supply / demand balance and, when a gap occurs in the supply / demand balance, calculates the amount of power to fill the gap.
  • a discharge instruction signal is transmitted to the control device 20 of at least one charge / discharge system 100 so as to discharge the calculated electric energy.
  • a charging instruction signal is transmitted to the control device 20 of at least one charging / discharging system 100 so as to charge the calculated electric energy.
  • the grid operation device 200 manages the charge amount and discharge amount of the storage battery 10 of each charge / discharge system 100 in real time, and the charge amount and discharge amount of the storage battery 10 of each charge / discharge system 100 are made as equal as possible.
  • the charging / discharging system 100 which should issue a discharge instruction
  • an algorithm for determining the charge / discharge system 100 to issue the discharge instruction and the charge instruction an existing general algorithm may be used.
  • the console terminal device 70 is a device constructed by a PC or the like used by a power storage company.
  • the console terminal device 70 may be installed in the vicinity of the place where the storage battery 10 is installed, or may be installed far away.
  • a common console terminal device 70 of the plurality of charge / discharge systems 100 may be installed in the operation room of the power storage company.
  • the console terminal device 70 accesses the exchange system of the frequency control service according to the user operation of the power storage company, bids for the market one day ago or the real time market, and receives the successful bid result. In addition, the console terminal device 70 changes settings of various parameters of the control device 20 and manually controls the storage battery 10, the switch circuit 11, and the bidirectional AC-DC converter 12 according to the user operation of the power storage company.
  • Control device 20 mainly controls charging / discharging of storage battery 10.
  • Control device 20 includes a charge / discharge instruction receiving unit 21, an operation instruction receiving unit 22, an SOC monitoring unit 23, an appropriate value determining unit 24, and a charge / discharge control unit 25.
  • These configurations can be realized by an arbitrary processor, memory, or other LSI in terms of hardware, and are realized by a program loaded in the memory in terms of software.
  • Draw functional blocks Accordingly, those skilled in the art will understand that these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.
  • the charge / discharge instruction receiving unit 21 receives an instruction signal from the system operation device 200. More specifically, the system operation device 200 periodically issues a charge instruction, a discharge instruction, or a standby instruction during a period for providing a frequency control service (hereinafter referred to as a service provision period) that has been successful in the market one day ago or in the real-time market. receive.
  • this service provision period is a period during which the grid operating organization is obliged to maintain a chargeable / dischargeable state between the power grid 50 and the storage battery 10 in accordance with an instruction from the grid operating device 200. It becomes.
  • the operation instruction receiving unit 22 receives an instruction from the console terminal device 70.
  • the SOC monitoring unit 23 continuously acquires the SOC of the storage battery 10 and monitors its value.
  • the SOC value can be measured by an integrating ammeter or the like. In addition, in a lithium ion battery, it can measure with a voltmeter.
  • the appropriate value determination unit 24 determines an appropriate value of the SOC of the storage battery 10. In the normal usage method of the storage battery 10, it is preferable to store as much energy as possible. Therefore, it is desirable to set the appropriate SOC value of the storage battery 10 to the upper limit value of the SOC range of the storage battery 10. That is, it is desirable to set the charge end voltage.
  • the appropriate value of the SOC in the vicinity of the intermediate value of the SOC range of the storage battery 10. This is based on a model in which an expected value that receives a charge instruction from the grid operation device 200 is equal to an expected value that receives a discharge instruction. For example, when the SOC range is 10% to 90%, it is desirable to set the appropriate value to about 50% to 60%. Generally, since the discharge rate is faster than the charge rate, it is preferable to set the discharge rate higher by a predetermined value than the intermediate value of the SOC range. In addition, when the full charge capacity of the storage battery 10 changes due to a change over time, the appropriate value determination unit 24 changes the capacity value corresponding to the appropriate value according to the change.
  • the charge / discharge control unit 25 charges or discharges the storage battery 10 so that the SOC of the storage battery 10 becomes an appropriate value determined by the appropriate value determination unit 24 by the start time of the service provision period described above.
  • the storage battery 10 is charged and discharged during a period other than the service provision period.
  • the discharge for adjusting the SOC is performed by passing a current through the resistor R1.
  • the charge for this SOC adjustment may be charged from the electric power system 50, or may be charged from the generator when a generator (for example, a solar panel) is provided.
  • the control for moving the SOC of the storage battery 10 to the appropriate value by the start time of the service provision period is mainly assumed to be a frequency control service for which a successful bid was made in the market one day ago. You may apply. Even when the time until the start time of the service provision period is short, the process of bringing the SOC of the storage battery 10 as close as possible to the appropriate value is effective.
  • the charging / discharging control unit 25 charges the storage battery 10 so that the SOC of the storage battery 10 approaches the appropriate value during a period in which no power needs to be exchanged between the power system 50 and the storage battery 10 within the service provision period described above. Or discharge.
  • the period in which it is not necessary to exchange power between the electric power system 50 and the storage battery 10 is the next charging instruction and the following charging instruction or discharging instruction based on the charging instruction or discharging instruction received from the system operation device 200. This refers to the period until one of the discharge instructions is received.
  • This control can be applied to both the frequency control service awarded by the market one day ago and the frequency control service awarded in the real-time market.
  • it is effective for a frequency control service that has been awarded in the real-time market, where the SOC of the storage battery 10 and the appropriate value thereof are likely to be separated.
  • the charge / discharge technique for adjusting the SOC uses the same technique as that described above.
  • FIG. 3 is a flowchart for explaining the SOC adjustment processing by the control device 20 during a period other than the service provision period of the frequency control service.
  • the console terminal device 70 accesses the frequency control service exchange system according to the user operation of the power storage company, bids on the market one day before, and makes a successful bid for the frequency control service after a predetermined time (S10).
  • the appropriate value determination unit 24 determines an appropriate value of the SOC of the storage battery 10 and sets it in the charge / discharge control unit 25 (S11).
  • the SOC monitoring unit 23 acquires the SOC of the storage battery 10 (S12).
  • the charge / discharge control unit 25 compares the acquired SOC with the set appropriate value (S13). When both do not correspond (N of S13), charge / discharge control of the storage battery 10 is performed (S14). Specifically, when the SOC is higher than the appropriate value, the charge / discharge control unit 25 controls the switch circuit 11 to discharge from the storage battery 10 to the resistor R1. On the other hand, when the SOC is lower than the appropriate value, the charge / discharge control unit 25 controls the switch circuit 11 and the bidirectional AC-DC converter 12 to charge the storage battery 10 from the power system 50. Thereafter, the process proceeds to step S12, and the SOC acquisition process of the storage battery 10 and the comparison process between the SOC and the appropriate value are continued.
  • step S13 if the SOC and the appropriate value match (Y in S13), the SOC adjustment process ends.
  • the SOC adjustment process ends even if the SOC and the appropriate value do not match.
  • FIG. 4 is a flowchart for explaining the SOC adjustment processing by the control device 20 during the service provision period of the frequency control service.
  • the determination and setting processing of the SOC by the appropriate value determination unit 24 is omitted.
  • system operation device 200 issues a charge instruction, a discharge instruction, or a standby instruction to control device 20 of each charge / discharge system 100 periodically (for example, once every 2 seconds or 4 seconds). To do.
  • the charge / discharge system 100 starts providing the frequency control service (S20).
  • the charge / discharge control unit 25 determines whether or not the service providing period has ended (S21). If completed (Y in S21), the provision of the frequency control service is terminated. If not completed (N in S21), the process proceeds to step S22.
  • the SOC monitoring unit 23 acquires the SOC of the storage battery 10 (S22).
  • the charge / discharge instruction receiving unit 21 receives an instruction from the system operation device 200 (S23).
  • the charge / discharge control unit 25 determines whether or not the instruction is a standby instruction (S24). If it is not a standby instruction (N in S24), the instruction is a charge instruction or a discharge instruction.
  • the charge / discharge control unit 25 performs charge / discharge control of the storage battery 10 in accordance with the received charge instruction or discharge instruction (S25). Specifically, in the case of a charge instruction, the storage battery 10 is charged from the power system 50, and in the case of a discharge instruction, the storage battery 10 is discharged to the power system 50. Then, the process of this cycle is complete
  • step S24 when the instruction received from the grid operation device 200 is a standby instruction (Y in S24), the charge / discharge control unit 25 performs charge / discharge control of the storage battery 10 for SOC adjustment (S26). Specifically, in the case of charging, charging is performed from the power system 50 or the generator, and in the case of discharging, discharging is performed to the resistor R1. Then, the process of this cycle is complete
  • the charge / discharge control unit 25 ignores a charge instruction in which the SOC of the storage battery 10 exceeds the upper limit value of the SOC range. Similarly, a discharge instruction in which the SOC of the storage battery 10 exceeds the lower limit value of the SOC range is ignored.
  • FIG. 5 is a diagram for describing a first processing example in a case where the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • FIG. 6 is a diagram for describing a first processing example in the case where the SOC of the storage battery 10 exceeds the lower limit value of the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the SOC range is 10% to 90%, and the appropriate value of SOC is 60%. Further, it is assumed that the SOC of the storage battery 10 is 60% of the appropriate value at the start time of the service provision period.
  • the control device 20 receives instructions from the grid operation device 200 in the order of charge instruction, discharge instruction, charge instruction, charge instruction, discharge instruction, charge instruction, and charge instruction, and receives the next instruction at time t7. think about.
  • the speed of charging based on the charging instruction and the speed of discharging based on the discharging instruction the latter is faster, so the downward arrow line indicating discharge is drawn longer than the upward arrow line indicating charging.
  • the actual fluctuation amount of the SOC based on one instruction is smaller than the fluctuation amount shown in FIG. 5, but the arrow line is made longer for easy understanding of the drawing.
  • the charging / discharging control unit 25 receives a charging instruction at time t7, the charging instruction is ignored.
  • a cross indicates that the instruction is ignored, and a circle indicates that the instruction is treated as valid.
  • the charge / discharge control unit 25 performs discharge. Even after receiving the charge instruction at time t7 and ignoring the charge instruction, when the charge instruction is received again at time t8, the charge / discharge control unit 25 ignores the charge instruction.
  • the charge / discharge control unit 25 performs discharge.
  • the control device 20 receives instructions from the grid operation device 200 in the order of discharge instruction, discharge instruction, charge instruction, discharge instruction, charge instruction, charge instruction, discharge instruction, and discharge instruction, and receives the next instruction.
  • the lower limit (10%) of the SOC range is exceeded. Therefore, when the charge / discharge control unit 25 receives a discharge instruction at time t8, the discharge instruction is ignored. If a charge instruction is received, charge is performed. After receiving the discharge instruction at time t8 and ignoring the discharge instruction, the charge / discharge control unit 25 also ignores the discharge instruction when receiving the discharge instruction again at time t9. When a charge instruction is received, the charge / discharge control unit 25 performs charging.
  • FIG. 7 is a flowchart for explaining a first processing example in the case where the SOC of the storage battery 10 exceeds the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the determination and setting processing of the SOC by the appropriate value determination unit 24 is omitted. Further, a period in which neither a charge instruction nor a discharge instruction is given is ignored.
  • the charging / discharging system 100 starts providing the frequency control service (S40).
  • the charge / discharge control unit 25 determines whether or not the service providing period has ended (S41). When it is finished (Y in S41), the provision of the frequency control service is finished. If not completed (N in S41), the process proceeds to step S42.
  • the SOC monitoring unit 23 acquires the SOC of the storage battery 10 (S42).
  • the charge / discharge instruction receiving unit 21 receives a charge instruction or a discharge instruction from the system operation device 200 (S43).
  • the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 when charging is performed based on the charge instruction. (S50).
  • the charge instruction is ignored (S52).
  • N of S50 the charging control based on the charging instruction is performed (S51). Thereafter, in any case, the processing in this cycle is terminated, the process proceeds to step S41, and the processing in the next cycle is started.
  • step S44 when the received instruction is a discharge instruction (N in S44), the charge / discharge control unit 25 determines that the SOC of the storage battery 10 is the lower limit value of the SOC range of the storage battery 10 when discharged based on the discharge instruction. It is determined whether it exceeds (S60). When exceeding (Y of S60), the discharge instruction is ignored (S62). When not exceeding (N of S60), discharge control based on the discharge instruction is performed (S61). Thereafter, in any case, the processing in this cycle is terminated, the process proceeds to step S41, and the processing in the next cycle is started.
  • FIG. 8 is a diagram for describing a second processing example in a case where the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the control device 20 receives instructions from the grid operation device 200 in the order of charge instruction, discharge instruction, charge instruction, charge instruction, discharge instruction, charge instruction, and charge instruction, and receives the next instruction at time t7. think about.
  • the charging instruction for the SOC of the storage battery 10 exceeding the upper limit value of the SOC range is received, the charging instruction is ignored until the SOC of the storage battery 10 returns to an appropriate value. If a discharge instruction is received, discharge is performed. At time t8, since the SOC of the storage battery 10 has not returned to an appropriate value after receiving the charge instruction for the SOC of the storage battery 10 exceeding the upper limit value of the SOC range, the charge / discharge control unit 25 has received the charge instruction. If so, ignore the charging instructions.
  • FIG. 9 is a flowchart for explaining a second processing example in a case where the SOC of the storage battery 10 exceeds the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the charge / discharge control unit 25 sets “0” for each of the upper limit flag and the lower limit flag (S39).
  • the upper limit flag “0” indicates that charging is possible
  • the upper limit flag “1” indicates that charging is not possible
  • the lower limit flag “0” indicates that discharging is possible
  • the lower limit flag “1” indicates that discharging is not possible.
  • the SOC monitoring unit 23 acquires the SOC of the storage battery 10 (S42).
  • the charge / discharge instruction receiving unit 21 receives a charge instruction or a discharge instruction from the system operation device 200 (S43).
  • the charge / discharge control unit 25 determines whether or not the upper limit flag is “1” (S50).
  • the upper limit flag is “1” (Y in S50)
  • the process of this cycle is terminated, the process proceeds to step S41, and the process of the next cycle is performed.
  • the upper limit flag is “0” (N in S50)
  • the process proceeds to step S51.
  • the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 when charged based on the above-described charging instruction (S51). When not exceeding (N of S51), the charging control based on the charging instruction is performed (S52). The charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 has returned to an appropriate value for the SOC of the storage battery 10 (S55). If not returned (N in S55), the process of this cycle is terminated, the process proceeds to step S41, and the process of the next period is started. When returning (Y in S55), the charge / discharge control unit 25 sets “0” in the lower limit flag (S57).
  • step S51 when the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 (Y in S51), the charge / discharge control unit 25 sets “1” in the upper limit flag (S53), Ignored (S54). Then, the process of this cycle is complete
  • step S44 when the received instruction is a discharge instruction (N in S44), the charge / discharge control unit 25 determines whether or not the lower limit flag is “1” (S60). When the lower limit flag is “1” (Y in S60), the process in this cycle is terminated, the process proceeds to step S41, and the process proceeds to the next period. When the lower limit flag is “0” (N in S60), the process proceeds to step S61.
  • the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 exceeds the lower limit value of the SOC range of the storage battery 10 when discharged based on the above discharge instruction (S61). When not exceeding (N of S61), discharge control based on the discharge instruction is performed (S62). The charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 has returned to an appropriate value for the SOC of the storage battery 10 (S65). If not returned (N in S65), the process of this cycle is terminated, the process proceeds to step S41, and the process of the next period is started. When returning (Y in S65), the charge / discharge control unit 25 sets “0” in the upper limit flag (S67).
  • step S61 when the SOC of the storage battery 10 exceeds the lower limit value of the SOC range of the storage battery 10 (Y in S61), the charge / discharge control unit 25 sets “1” in the lower limit flag (S63), and issues a discharge instruction. Ignored (S64). Then, the process of this cycle is complete
  • the charging / discharging control unit 25 when the charging / discharging control unit 25 receives a charging instruction in which the SOC of the storage battery 10 exceeds the upper limit value of the SOC range, the charging instruction is performed until the SOC of the storage battery 10 returns to the inside of the upper protection range of the SOC range. ignore.
  • the SOC of storage battery 10 receives a discharge instruction that exceeds the lower limit of the SOC range, the discharge instruction is ignored until the SOC of storage battery 10 returns to the inside of the lower protection range of the SOC range.
  • this restriction is released, and the charge / discharge control unit 25 treats both the charge instruction and the discharge instruction as valid.
  • FIG. 10 is a diagram for explaining a third processing example in a case where the SOC of the storage battery 10 exceeds the lower limit value of the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • FIG. 10 illustrates an example in which the upper protection range of the SOC is set to 75% to 90%, and the lower protection range is set to 10% to 25%.
  • the control device 20 receives instructions from the grid operation device 200 in the order of discharge instruction, discharge instruction, charge instruction, charge instruction, charge instruction, discharge instruction, discharge instruction, charge instruction, and charge instruction.
  • discharge instruction When the next instruction is received.
  • the lower limit (10%) of the SOC range is exceeded. Therefore, when the charge / discharge control unit 25 receives a discharge instruction at time t8, the discharge instruction is ignored. If a charge instruction is received, charge is performed.
  • a time point t9 at which the next instruction is received after the charging instruction is received and charged at the time point t8.
  • the SOC of the storage battery 10 has not returned to the inside of the lower protection range. Therefore, when the charge / discharge control unit 25 receives a discharge instruction at time t9, the discharge instruction is ignored. If a charge instruction is received, charge is performed.
  • the charge / discharge control unit 25 performs discharge when receiving a discharge instruction at time t10. Charging is also performed when a charging instruction is received.
  • FIG. 11 is a flowchart for explaining a third processing example in a case where the SOC of the storage battery 10 exceeds the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the flowchart of FIG. 11 has a configuration in which steps S55 and S65 in the flowchart of FIG. 9 are replaced with steps S56 and S66, respectively.
  • step S56 the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 has returned to the inside of the upper protection range of the SOC range of the storage battery 10 (S56). If not returned (N in S56), the process of this cycle is terminated, the process proceeds to step S41, and the process of the next period is started. When returning (Y in S56), the charge / discharge control unit 25 sets “0” in the lower limit flag (S57). Then, the process of this cycle is complete
  • step S66 the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 has returned to the lower protection range of the SOC range of the storage battery 10 (S66). If not returned (N in S66), the process in this cycle is terminated, the process proceeds to step S41, and the process proceeds to the next period.
  • the charge / discharge control unit 25 sets “0” in the upper limit flag (S67). Then, the process of this cycle is complete
  • Other processes are the same as those in the flowchart of FIG.
  • the charge / discharge control unit 25 may perform charging for SOC adjustment while ignoring the discharge instruction.
  • the charge / discharge control unit 25 may perform charging for SOC adjustment while ignoring the discharge instruction.
  • FIG. 12 is a diagram for explaining a fourth processing example in the case where the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the control device 20 receives instructions from the grid operation device 200 in the order of charge instruction, discharge instruction, charge instruction, charge instruction, discharge instruction, charge instruction, and charge instruction, and receives the next instruction at time t7. think about.
  • the charging / discharging control unit 25 receives a charging instruction at time t7, the charging instruction is ignored.
  • discharge is performed.
  • the charge / discharge control unit 25 performs discharge to other than the power system 50.
  • the SOC of the storage battery 10 is lower than that at time t7 due to the discharge to other than the power system 50.
  • the charge / discharge control unit 25 receives a charge instruction at time t8, the charge / discharge control unit 25 performs charging.
  • the discharge is performed.
  • FIG. 13 is a flowchart for explaining a fourth processing example in the case where the SOC of the storage battery 10 exceeds the SOC range of the storage battery 10 within the service provision period of the frequency control service.
  • the flowchart of FIG. 13 has a configuration in which steps S58 and S68 are added to the flowchart of FIG.
  • the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 exceeds the upper limit value of the SOC range of the storage battery 10 when charging is performed based on the charging instruction received from the system operation device 200 (S50). When exceeding (Y of S50), the charge / discharge control unit 25 ignores the charge instruction (S52) and performs discharge control for SOC adjustment (S58). Then, the process of this cycle is complete
  • the charge / discharge control unit 25 determines whether or not the SOC of the storage battery 10 exceeds the lower limit value of the SOC range of the storage battery 10 when discharged based on the discharge instruction received from the system operation device 200 (S60). When exceeding (Y of S60), the charge / discharge control unit 25 ignores the discharge instruction (S62) and performs charge control for SOC adjustment (S68). Then, the process of this cycle is complete
  • the storage battery 10 is protected by bringing the SOC of the storage battery 10 as close as possible to an appropriate value during a period when system frequency control is not performed.
  • a decrease in the frequency control function can be suppressed.
  • the number of times that the instruction from the grid operating engine is ignored can be reduced as much as possible while the storage battery 10 is controlled in the SOC range.
  • the above-described fourth processing example is a processing in which charge / discharge control for SOC adjustment is combined with the first processing example.
  • the second processing example or the third processing example may be combined with charge / discharge control for SOC adjustment. In either case, the SOC adjustment discharge control or charge control is performed in a period in which the charge instruction or discharge instruction is ignored.
  • some functions of the charge / discharge instruction receiving unit 21, the appropriate value determining unit 24, and the charge / discharge control unit 25 of the control device 20 may be performed by the console terminal device 70 or another device on the communication network 60. The designer can appropriately distribute various functions to the control device 20, the console terminal device 70, and another device.
  • the storage battery 10 is provided as a frequency control power source for the power system 50 to the grid operating organization for a fee.
  • the power system 50 and the charge / discharge system 100 may be managed by the same power company.
  • the electric power company may provide the frequency control service free of charge, or may obtain compensation from a power generation company that owns the power plant 30 other than the electric power company.
  • the invention according to the present embodiment may be specified by the items described below.
  • a storage battery capable of charging from and discharging to the power system;
  • a control device for controlling charging and discharging of the storage battery, In response to an instruction from an operating entity of the power system, the control device exchanges the power by or before the start time of a period to be charged / discharged between the power system and the storage battery.
  • a charging / discharging system that charges or discharges the storage battery so that the SOC (State Of Charge) of the storage battery becomes a predetermined appropriate value while the storage battery does not need to be performed.
  • the control device receives a charge instruction or a discharge instruction from the operating entity during the period, and charges the storage battery from the power system or discharges the storage battery from the storage system according to the instruction, and the SOC of the storage battery is When a charge instruction exceeding the upper limit value of the SOC range of the storage battery is received, the charge instruction is ignored, and when a discharge instruction exceeding the lower limit value of the SOC range is received, the discharge instruction is ignored.
  • the charge / discharge system according to 1.
  • the control device ignores the charge instruction until the SOC of the storage battery returns to the appropriate value when the SOC of the storage battery exceeds the upper limit value of the SOC range, and the SOC of the storage battery is determined to be the SOC. 3.
  • the period is a period of providing the storage battery as a frequency control power source for the power system to the operating entity for a fee or free of charge.
  • the control device charges or discharges the storage battery so that the SOC of the storage battery becomes the appropriate value during a period in which the storage battery is not provided to the operating entity as a frequency control power source of the power system.
  • the charging / discharging system in any one of.
  • the control device receives a charge instruction or a discharge instruction from the operating entity within the period, charges the storage battery from the power system or discharges the storage battery to the power system according to the instruction, and then from the operating entity.
  • the charge according to any one of items 1 to 5, wherein the storage battery is charged or discharged regardless of frequency control of the power system so that the SOC of the storage battery approaches the appropriate value until a next charge instruction or discharge instruction is received. Discharge system.
  • 100 charge / discharge system 200 system operation device, 500 power supply system, 10 storage battery, 11 switch circuit, 12 bidirectional AC-DC converter, R1 resistance, 20 control device, 21 charge / discharge instruction reception unit, 22 operation instruction reception unit, 23 SOC monitoring unit, 24 proper value determining unit, 25 charge / discharge control unit, 30 power plant, 40 consumers, 50 power system, 60 communication network, 70 console terminal device.
  • the present invention can be used for ancillary services using storage batteries.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

L'invention porte sur un accumulateur (10), qui est apte à se charger à partir d'un système d'alimentation (50) et à se décharger vers le système d'alimentation (50). Un dispositif de commande (20) commande la charge et la décharge de l'accumulateur (10). En réponse à un ordre à partir de l'agent d'actionnement du système d'alimentation (50), le dispositif de commande (20) charge ou décharge l'accumulateur (10) de telle sorte que l'état de charge (SOC) de l'accumulateur (10) prend une valeur appropriée prescrite avant le temps de début de la période pendant laquelle la charge ou la décharge doit s'effectuer entre le système d'alimentation (50) et l'accumulateur (10).
PCT/JP2012/006135 2011-09-27 2012-09-26 Système de charge/décharge WO2013046656A1 (fr)

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JP2011211279A JP2014233096A (ja) 2011-09-27 2011-09-27 充放電システム
JP2011-211279 2011-09-27
JP2011-211280 2011-09-27
JP2011211280A JP2014233097A (ja) 2011-09-27 2011-09-27 充放電システム

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WO2015136575A1 (fr) * 2014-03-14 2015-09-17 パナソニックＩｐマネジメント株式会社 Dispositif de commande de batterie de stockage, procédé de commande de batterie de stockage et système de commande de batterie de stockage
JP2017063060A (ja) * 2017-01-12 2017-03-30 東芝ライテック株式会社 照明装置、照明システム及び照明装置制御方法
EP3709466A1 (fr) * 2019-03-15 2020-09-16 Honda Motor Co., Ltd. Dispositif de gestion d'énergie électrique
WO2022024708A1 (fr) * 2020-07-29 2022-02-03 京セラ株式会社 Serveur de gestion d'énergie électrique, et procédé de gestion d'énergie électrique

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JP2010226942A (ja) * 2009-02-26 2010-10-07 Sanyo Electric Co Ltd 系統連系装置、系統連系システム及び配電システム
WO2011016273A1 (fr) * 2009-08-04 2011-02-10 日本電気株式会社 Système énergétique
JP2011083083A (ja) * 2009-10-05 2011-04-21 Panasonic Electric Works Co Ltd 電力供給システム及び電力供給システムの制御装置

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JP2010226942A (ja) * 2009-02-26 2010-10-07 Sanyo Electric Co Ltd 系統連系装置、系統連系システム及び配電システム
WO2011016273A1 (fr) * 2009-08-04 2011-02-10 日本電気株式会社 Système énergétique
JP2011083083A (ja) * 2009-10-05 2011-04-21 Panasonic Electric Works Co Ltd 電力供給システム及び電力供給システムの制御装置

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WO2015136575A1 (fr) * 2014-03-14 2015-09-17 パナソニックＩｐマネジメント株式会社 Dispositif de commande de batterie de stockage, procédé de commande de batterie de stockage et système de commande de batterie de stockage
JP5957775B2 (ja) * 2014-03-14 2016-07-27 パナソニックＩｐマネジメント株式会社 蓄電池制御装置、蓄電池制御方法、及び、蓄電池制御システム
JPWO2015136575A1 (ja) * 2014-03-14 2017-04-06 パナソニックＩｐマネジメント株式会社 蓄電池制御装置、蓄電池制御方法、及び、蓄電池制御システム
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EP3709466A1 (fr) * 2019-03-15 2020-09-16 Honda Motor Co., Ltd. Dispositif de gestion d'énergie électrique
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WO2022024708A1 (fr) * 2020-07-29 2022-02-03 京セラ株式会社 Serveur de gestion d'énergie électrique, et procédé de gestion d'énergie électrique

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