WO2016185661A1 - Système électrique réparti et procédé de commande de système électrique réparti - Google Patents

Système électrique réparti et procédé de commande de système électrique réparti Download PDF

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Publication number
WO2016185661A1
WO2016185661A1 PCT/JP2016/001982 JP2016001982W WO2016185661A1 WO 2016185661 A1 WO2016185661 A1 WO 2016185661A1 JP 2016001982 W JP2016001982 W JP 2016001982W WO 2016185661 A1 WO2016185661 A1 WO 2016185661A1
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Prior art keywords
power
power supply
inverters
inverter
storage battery
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PCT/JP2016/001982
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English (en)
Japanese (ja)
Inventor
田米　正樹
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パナソニックＩｐマネジメント株式会社
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Publication of WO2016185661A1 publication Critical patent/WO2016185661A1/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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • 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
    • 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
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
    • 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 distributed power supply system for supplying power to a load.
  • a storage battery may be used to supply power to a load.
  • the power control device described in Patent Document 1 supplies power to a load using a storage battery.
  • this power control device suppresses the burden on a storage battery that has deteriorated by adjusting the charging time or discharging time according to the deterioration state of the storage battery. Thereby, deterioration of a storage battery is suppressed and electric power is stably supplied with respect to load.
  • a power supply device including a plurality of storage batteries converts power output from the plurality of storage batteries from DC power to AC power by an inverter, and supplies the converted power to a load.
  • the power output from the whole of the plurality of storage batteries is limited due to the limitation of the inverter and is not supplied appropriately to the load.
  • Patent Document 1 a DC-DC converter is used to adjust the amount of power supplied from the storage battery to the load. Therefore, if both the DC-DC converter and the inverter are not operating properly, there is a possibility that power is not properly supplied to the load.
  • an object of the present invention is to provide a distributed power supply system and the like that can appropriately supply power using a plurality of storage batteries.
  • a distributed power supply system is a distributed power supply system that supplies power to a load, each of which includes a plurality of power generators that generate power using natural energy, and A power supply device to which power generated by the plurality of power generation devices is input, the power supply device including a plurality of power supply circuits, a plurality of storage batteries, and a plurality of inverters, and the plurality of power supply circuits,
  • the plurality of storage batteries and the plurality of inverters are, for each power generation device constituting the plurality of power generation devices, (i) a power supply circuit that generates power of a predetermined voltage from the power generated by the power generation device; (Ii) a storage battery in which the power obtained from the power supply circuit is charged and the charged power is discharged; and (iii) the power obtained from the power supply circuit and the storage battery is converted into AC power;
  • An inverter that outputs converted power to a power line to which the load is connected, and the distributed power
  • the distributed power system control method is a distributed power system control method for supplying power to a load, and each of the distributed power systems generates power using natural energy.
  • the power supply device includes a plurality of power supply circuits, a plurality of storage batteries, and a plurality of inverters,
  • the plurality of power supply circuits, the plurality of storage batteries, and the plurality of inverters are, for each power generation device constituting the plurality of power generation devices, (i) power having a predetermined voltage from power generated by the power generation device.
  • the distributed power supply system and the like can appropriately supply power using a plurality of storage batteries.
  • FIG. 1 is a block diagram illustrating a configuration of a distributed power supply system according to an embodiment.
  • FIG. 2 is a schematic diagram illustrating a facility where the distributed power supply system according to the embodiment is installed.
  • FIG. 3 is a block diagram showing the configuration of the distributed power supply system in the reference example.
  • FIG. 4 is a flowchart illustrating the operation of the distributed power supply system according to the embodiment.
  • FIG. 5 is a relationship diagram illustrating an example of the state of the storage battery and the output amount of the inverter in the embodiment.
  • FIG. 6 is a graph illustrating an example of the output amount of the inverter in the embodiment.
  • FIG. 7 is a relationship diagram illustrating an example of the state of the storage battery and the output amount of the inverter in the embodiment.
  • FIG. 8 is a relationship diagram illustrating an example of the state of the storage battery and the output amount of the inverter in the embodiment.
  • FIG. 9 is a relationship diagram illustrating an example of the state of the storage battery and the output amount of the inverter in the embodiment.
  • FIG. 10 is a block diagram illustrating an example of the configuration of the controller and the inverter in the embodiment.
  • FIG. 11 is a block diagram illustrating an example of a configuration of a controller and an inverter in the embodiment.
  • FIG. 12 is a graph illustrating an example of output characteristics of the inverter according to the embodiment.
  • FIG. 13 is a schematic diagram illustrating a virtual synchronous generator in the embodiment.
  • FIG. 1 is a block diagram showing a configuration of a distributed power supply system according to the present embodiment.
  • the distributed power supply system 100 shown in FIG. 1 includes power generation devices 111, 112, and 113, a power supply device 101, and a controller 103, and supplies power to a load 200.
  • Each of the power generators 111, 112, and 113 generates electric power using natural energy such as sunlight, wind power, or geothermal heat.
  • the power generation devices 111, 112, and 113 may be the same type of power generation device, or may be different types of power generation devices.
  • each of the power generation devices 111, 112, and 113 may be a solar cell that generates power using sunlight, or may be a solar power generation device that includes a solar cell.
  • each of power generators 111, 112, and 113 generates DC power and outputs the generated DC power.
  • the power supply device 101 receives the power generated by the power generation devices 111, 112, and 113, converts the received power into power for supplying to the load 200, and supplies the converted power to the load 200.
  • the power supply apparatus 101 includes power supply units 121, 122, 123 and a switch 102.
  • the power supply unit 121 includes a power supply circuit 131, a storage battery 141, and an inverter 151.
  • the power supply unit 122 includes a power supply circuit 132, a storage battery 142, and an inverter 152.
  • the power supply unit 123 includes a power supply circuit 133, a storage battery 143, and an inverter 153. That is, the power supply device 101 includes power supply circuits 131, 132, 133, storage batteries 141, 142, 143, inverters 151, 152, 153, and a switch 102.
  • Each of the power supply circuits 131, 132, and 133 is a power supply circuit that generates power of a predetermined voltage, and specifically, a DC power supply circuit that generates DC power of a predetermined voltage.
  • each of the power supply circuits 131, 132, and 133 may be a DC-DC converter that generates DC power having a predetermined voltage by converting DC power into DC power having a predetermined voltage.
  • each of the power supply circuits 131, 132, 133 may be a charger that suppresses overcurrent and generates DC power of a predetermined voltage in which the overcurrent is suppressed.
  • the power supply circuit 131 generates DC power of a predetermined voltage (for example, 12V DC power) from the DC power (for example, 24V DC power) generated by the power generation device 111.
  • the power supply circuit 132 generates DC power having a predetermined voltage from the DC power generated by the power generator 112.
  • the power supply circuit 133 generates DC power having a predetermined voltage from the DC power generated by the power generation device 113.
  • the predetermined voltage is not necessarily a constant voltage.
  • the predetermined voltage may be a voltage included in a predetermined voltage range such as a voltage included in a range from 11 V to 13 V, for example. Further, the same voltage may be used as the predetermined voltage in the power supply circuits 131, 132, and 133, and different voltages may be used as the predetermined voltages in the power supply circuits 131, 132, and 133.
  • Each of the storage batteries 141, 142, and 143 is a secondary battery for charging and discharging electric power.
  • the storage battery 141 is charged with power generated by the power supply circuit 131.
  • the power charged in the storage battery 141 is discharged from the storage battery 141.
  • the battery 142 is charged with power generated by the power supply circuit 132. Further, the electric power charged in the storage battery 142 is discharged from the storage battery 142.
  • the storage battery 143 is charged with power generated by the power supply circuit 133. In addition, the power charged in the storage battery 143 is discharged from the storage battery 143.
  • the storage batteries 141, 142, and 143 have a role of accumulating the electric power generated by the power generation devices 111, 112, and 113 and supplying the electric power stably according to demand.
  • Each of inverters 151, 152, and 153 converts electric power into AC power, and outputs the converted electric power to a power line (power line passing through switch 102) to which load 200 is connected.
  • inverter 151 converts power (DC power) obtained from power supply circuit 131 and storage battery 141 into AC power, and outputs the converted power.
  • the power generated by the power supply circuit 131 is larger than the power to be converted by the inverter 151
  • the power to be converted by the inverter 151 among the power generated by the power supply circuit 131 is input to the inverter 151.
  • the remaining power is charged in the storage battery 141.
  • the power generated by the power supply circuit 131 is smaller than the power to be converted by the inverter 151
  • the power corresponding to the shortage is discharged from the storage battery 141, and the power generated by the power supply circuit 131 and the storage battery 141 are discharged. Power is input to the inverter 151.
  • the power generated by the power supply circuit 131 is equal to the power to be converted by the inverter 151
  • the power generated by the power supply circuit 131 is input to the inverter 151.
  • the power input to the inverter 151 is converted into AC power and output.
  • the inverter 152 converts the power obtained from the power supply circuit 132 and the storage battery 142 into AC power, and outputs the converted power.
  • Inverter 153 converts the power obtained from power supply circuit 133 and storage battery 143 into AC power, and outputs the converted power.
  • the power supply apparatus 101 supplies the power output from the inverters 151, 152, and 153 to the load 200 via the power line.
  • Each of the inverters 151, 152, and 153 may be a bidirectional inverter.
  • the inverter 151 converts the power (AC power) obtained from the power line to which the load 200 is connected into DC power.
  • inverters 152 and 153 are connected to the power line to which the load 200 is connected, and the inverter 151 converts AC power obtained from the inverters 152 and 153 through the power line into DC power.
  • the inverter 151 charges the storage battery 141 with DC power.
  • the inverter 152 converts the power obtained from the power line to which the load 200 is connected into DC power.
  • the inverter 152 charges the storage battery 142 with DC power.
  • the inverter 153 converts the power obtained from the power line to which the load 200 is connected into DC power.
  • Inverter 153 charges storage battery 143 with DC power. Thereby, the surplus power with respect to the demand power of the load 200 is charged in the storage batteries 141, 142, and 143.
  • the electric power charged in the storage battery 141 is discharged, and the inverter 151 converts the electric power discharged from the storage battery 141 into AC power and outputs it.
  • the inverter 152 converts the power output from the inverter 151 into DC power and charges the storage battery 142. Thereby, the inverters 151 and 152 can move the electric power charged in the storage battery 141 to the storage battery 142.
  • each of the inverters 151, 152, and 153 may operate as a voltage source that generates a voltage and outputs electric power of the generated voltage. That is, each of inverters 151, 152, and 153 may operate as a voltage source inverter. Thereby, each of inverter 151,152,153 can perform a self-sustained operation, without depending on another electric power system. Further, any of the inverters 151, 152, and 153 may operate as a voltage source inverter.
  • each of the inverters 151, 152, and 153 may operate as a virtual synchronous generator by outputting electric power by simulating the output characteristics of the synchronous generator. That is, each of the inverters 151, 152, and 153 may output power like a synchronous generator. Specifically, each of the inverters 151, 152, and 153 calculates the phase of the rotor in the virtual synchronous generator based on the output amount, and uses the calculated phase as the phase of the AC voltage to generate AC power. Output.
  • each of the inverters 151, 152, and 153 can operate like a synchronous generator.
  • the inverters 151, 152, and 153 can synchronize with each other and stably output power.
  • each of inverters 151, 152, and 153 may output power in accordance with droop control.
  • each of inverters 151, 152, and 153 may output AC power according to a correspondence relationship between an increase in output amount and a decrease in frequency or voltage (at least one of frequency and voltage).
  • each of the inverters 151, 152, and 153 may adapt the output amount and the frequency or voltage to a predetermined correspondence relationship. More specifically, each of the inverters 151, 152, and 153 may match the output amount and the frequency or voltage with a predetermined correspondence.
  • the inverters 151, 152, and 153 can adjust the output amount and the voltage or frequency based on a predetermined correspondence relationship, and can output power in a coordinated manner.
  • the switch 102 opens and closes a power line between the inverters 151, 152, and 153 and the load 200. Thereby, the power supply from the distributed power supply system 100 to the load 200 is controlled. That is, when the switch 102 is closed, power is supplied from the distributed power supply system 100 to the load 200, and when the switch 102 is opened, power supply from the distributed power supply system 100 to the load 200 is stopped.
  • the switch 102 may be manually opened and closed, or may be opened and closed by the controller 103.
  • the controller 103 causes the inverters 151, 152, and 153 to share and output the power supplied to the load 200 according to the state of each of the storage batteries 141, 142, and 143. That is, the controller 103 adjusts the output amounts of the inverters 151, 152, and 153 according to the states of the storage batteries 141, 142, and 143. Then, the controller 103 causes the inverters 151, 152, and 153 to output power corresponding to the power demand amount of the load 200.
  • the controller 103 acquires the state of charge (SOC: State Of Charge) of each of the storage batteries 141, 142, and 143. Specifically, the controller 103 may acquire the state of charge of each of the storage batteries 141, 142, and 143 by measuring the charge / discharge amount via a power sensor. The controller 103 may acquire the state of charge by measuring the voltage for each of the storage batteries 141, 142, and 143.
  • SOC State Of Charge
  • Each of the storage batteries 141, 142, 143 may hold information indicating the state of charge in a memory.
  • the controller 103 may acquire the respective charging states of the storage batteries 141, 142, and 143 by communicating with the storage batteries 141, 142, and 143 and receiving information indicating the charging state.
  • the controller 103 causes the inverters 151, 152, and 153 to share the output amount corresponding to the power demand amount of the load 200 in accordance with the respective states of the storage batteries 141, 142, and 143. For example, the controller 103 determines the output amount of the inverter 151, the output amount of the inverter 152, and the output amount of the inverter 153 according to the ratio of the charged state of the storage battery 141, the charged state of the storage battery 142, and the charged state of the storage battery 143. Is proportionally distributed.
  • the controller 103 transmits a command value indicating the output amount to each of the inverters 151, 152, and 153 via the communication line.
  • Each of inverters 151, 152, and 153 receives the command value and outputs power corresponding to the output amount indicated by the command value.
  • the controller 103 can cause each of the inverters 151, 152, and 153 to output power corresponding to the assigned output amount.
  • controller 103 may control the operation of each of the inverters 151, 152, and 153 by controlling the operation of any of the inverters 151, 152, and 153.
  • the controller 103 causes the inverter 151 to output power corresponding to the output amount allocated to the inverter 151.
  • the remaining inverters 152 and 153 divide the power corresponding to the shortage of the power supply amount of the inverter 151 with respect to the power demand amount of the load 200 into two equal parts and output. Thereby, the operation of inverters 152 and 153 is indirectly controlled.
  • the controller 103 can output the power supplied to the load 200 to the inverters 151, 152, and 153 according to the respective states of the storage batteries 141, 142, and 143.
  • the controller 103 may be a dedicated or general-purpose information processing circuit, for example.
  • the controller 103 may be a processor or a computer including a processor.
  • the load 200 is one or more electric devices that consume power. Power is supplied from the power supply device 101 to the load 200.
  • FIG. 2 is a schematic diagram showing a facility where the distributed power supply system 100 shown in FIG. 1 is installed.
  • the facility 104 shown in FIG. 2 is a consumer's facility, for example, a consumer's house.
  • the distributed power supply system 100 is installed in a facility 104.
  • each of the power generation devices 111, 112, and 113 is a solar cell panel including a solar cell that generates electric power using sunlight, and is installed on the roof of the facility 104.
  • a housing 105 including the power supply device 101 and the controller 103 is installed inside the facility 104.
  • the power supply apparatus 101 receives power from each of the power generation apparatuses 111, 112, and 113 via the power line, and supplies power to the load 200 installed inside the facility 104 via the power line.
  • the load 200 is an air conditioner.
  • the distributed power supply system 100 is installed in the customer facility 104 and used in the customer facility 104. Thereby, the loss of the electric power in power transmission is suppressed.
  • the power supply apparatus 101 and the controller 103 may be packaged in the same package. That is, the power supply device 101 and the controller 103 may be included in one housing 105. Thereby, the power supply device 101 and the controller 103 can be used as one integrated device. In addition, the wiring and the like between each component of the power supply apparatus 101 and the controller 103 are protected by the casing 105 that covers the power supply apparatus 101 and the controller 103.
  • the power supply apparatus 101 and the controller 103 are included in one casing 105, but are not necessarily included in one casing 105.
  • the power supply device 101 and the controller 103 may be separate devices.
  • the power supply apparatus 101 and the controller 103 may be communicable with each other by wire or wirelessly. Further, as long as the power supply device 101 is a single device, the power supply device 101 is not necessarily a device included in a single housing such as the housing 105.
  • FIG. 3 is a block diagram showing the configuration of the distributed power supply system in the reference example.
  • the distributed power supply system 100a shown in FIG. 3 includes a power generation device 110a and a power supply device 101a, and supplies power to the load 200.
  • the power supply apparatus 101a includes a power supply circuit 130a, storage batteries 141a, 142a, 143a, an inverter 150a, and a switch 102a.
  • the power generation device 110a is a component corresponding to each of the power generation devices 111, 112, and 113 in FIG.
  • the power supply circuit 130a is a component corresponding to each of the power supply circuits 131, 132, and 133 in FIG.
  • the storage batteries 141a, 142a, and 143a are components corresponding to the storage batteries 141, 142, and 143 in FIG.
  • the inverter 150a is a component corresponding to each of the inverters 151, 152, and 153 in FIG.
  • the switch 102a is a component corresponding to the switch 102 in FIG.
  • the distributed power supply system 100a in the reference example one inverter 150a is used.
  • three inverters 151, 152, and 153 are used.
  • the distributed power supply system 100 according to the embodiment can supply larger power to the load 200.
  • the distributed power supply system 100 appropriately shares the power supplied to the load 200 to the inverters 151, 152, and 153 by adjusting the output amounts of the inverters 151, 152, and 153, respectively. Can be made. Therefore, electric power is appropriately supplied to the load 200.
  • FIG. 4 is a flowchart showing the operation of the distributed power supply system 100 shown in FIG. First, each of the power generators 111, 112, and 113 generates electric power using natural energy (S101). The electric power generated by the power generation devices 111, 112, and 113 is input to the power supply device 101.
  • S101 natural energy
  • each of the power supply circuits 131, 132, and 133 generates power of a predetermined voltage (S102).
  • the power supply circuit 131 generates power with a predetermined voltage from the power generated by the power generation device 111.
  • the power supply circuit 132 generates power having a predetermined voltage from the power generated by the power generation device 112.
  • the power supply circuit 133 generates power having a predetermined voltage from the power generated by the power generation device 113.
  • the controller 103 causes the inverters 151, 152, and 153 to share the power supplied to the load 200 (power to be supplied to the load 200) according to the state of each of the storage batteries 141, 142, and 143 (S103). Thereby, the electric power used by each of inverters 151, 152, and 153 is specified.
  • charging / discharging of the storage batteries 141, 142, 143 is performed according to the power used by the inverters 151, 152, 153 and the power generated by the power supply circuits 131, 132, 133 (S104).
  • the inverter 151 when the power used by the inverter 151 is larger than the power generated by the power supply circuit 131, the insufficient power is discharged from the storage battery 141.
  • the surplus power is charged in the storage battery 141.
  • the storage batteries 142 and 143 are charged and discharged in the same manner as the storage battery 141.
  • the inverters 151, 152, and 153 convert the power obtained from the power supply circuits 131, 132, and 133 and the storage batteries 141, 142, and 143 into AC power, and the converted power is a power line to which the load 200 is connected. (S105).
  • the inverter 151 converts the power obtained from the power supply circuit 131 and the storage battery 141 into AC power, and outputs the converted power to the power line to which the load 200 is connected.
  • Inverter 152 converts the power obtained from power supply circuit 132 and storage battery 142 into alternating current power, and outputs the converted power to the power line to which load 200 is connected.
  • Inverter 153 converts the power obtained from power supply circuit 133 and storage battery 143 into AC power, and outputs the converted power to a power line to which load 200 is connected.
  • the output amounts of the inverters 151, 152, and 153 are the output amounts specified by sharing the power demand amount of the load 200 to the inverters 151, 152, and 153 (S103).
  • the controller 103 transmits a command value indicating the specified output amount to the inverters 151, 152, and 153.
  • Inverters 151, 152, and 153 output power corresponding to the amount of power indicated by the command value (S105).
  • the distributed power supply system 100 can appropriately supply power to the load 200.
  • FIG. 5 is a relationship diagram illustrating an example of the state of the storage batteries 141, 142, and 143 and the output amounts of the inverters 151, 152, and 153 in the power supply units 121, 122, and 123 illustrated in FIG.
  • the state of charge of the storage batteries 141, 142, 143 (SOC) is used as the state of the storage batteries 141, 142, 143.
  • the state of charge indicates the remaining capacity, and is represented by, for example, the ratio of the remaining capacity to the fully charged state.
  • the state of charge of the storage battery 141 is 70%
  • the state of charge of the storage battery 142 is 50%
  • the state of charge of the storage battery 143 is 30%.
  • the smaller the remaining capacity the smaller the output amount is allocated, and the total output amounts of the inverters 151, 152, 153 are proportionally distributed according to the ratio of the remaining capacities of the storage batteries 141, 142, 143.
  • the controller 103 causes the inverters 151, 152, and 153 to output power corresponding to these output amounts. Thereby, appropriate electric power is output based on the remaining capacity.
  • FIG. 6 is a graph showing an example of output amounts of the inverters 151, 152, and 153 shown in FIG.
  • the total output amount of the inverters 151, 152, and 153 corresponds to the total power supplied to the load 200.
  • the total output amounts of the inverters 151, 152, and 153 are proportionally distributed according to the ratio of the remaining capacities of the storage batteries 141, 142, and 143 shown in FIG.
  • the distributed power supply system 100 distributes the entire power supplied to the load 200 to the inverters 151, 152, and 153 according to the ratio of the remaining capacities of the storage batteries 141, 142, and 143 and outputs them. Can do.
  • FIG. 7 is a relationship diagram showing another example of the states of the storage batteries 141, 142, and 143 and the output amounts of the inverters 151, 152, and 153 in the power supply units 121, 122, and 123 shown in FIG.
  • the state of charge of the storage batteries 141, 142, and 143 SOC is used as the state of the storage batteries 141, 142, and 143.
  • electric power is output from an inverter connected to a storage battery whose remaining capacity is larger than a predetermined remaining capacity among the storage batteries 141, 142, and 143.
  • the predetermined remaining capacity is, for example, a remaining capacity corresponding to a 50% charged state.
  • the state of charge of the storage battery 141 is greater than 50%, and the state of charge of the storage batteries 142 and 143 is 50% or less. Therefore, the inverter 151 connected to the storage battery 141 outputs power, and the inverters 152 and 153 connected to the storage batteries 142 and 143 do not output power.
  • the controller 103 causes the inverter 151 to output 15 kW power and does not cause the inverters 151 and 152 to output power. Thereby, electric power is stably output from the inverter 151 connected to the storage battery 141 with a large remaining capacity.
  • two or more inverters may output electric power.
  • the entire output amount may be proportionally distributed to two or more inverters according to the state of charge.
  • the predetermined remaining capacity may be determined based on the remaining capacity of the storage battery 141, the remaining capacity of the storage battery 142, and the remaining capacity of the storage battery 143.
  • the predetermined remaining capacity may be the second largest remaining capacity among the remaining capacity of the storage battery 141, the remaining capacity of the storage battery 142, and the remaining capacity of the storage battery 143.
  • the inverter connected to the storage battery having the largest remaining capacity outputs power, and the other inverters do not output power.
  • the predetermined remaining capacity may be an average remaining capacity of the remaining capacity of the storage battery 141, the remaining capacity of the storage battery 142, and the remaining capacity of the storage battery 143.
  • FIG. 8 is a relationship diagram illustrating another example of the state of the storage batteries 141, 142, and 143 and the output amounts of the inverters 151, 152, and 153 in the power supply units 121, 122, and 123 illustrated in FIG.
  • power is output from the inverter connected to the storage battery in the normal state among the storage batteries 141, 142, and 143, and no power is output from the inverter connected to the storage battery in the abnormal state.
  • the controller 103 determines whether or not the storage battery 141 is normal based on whether or not the accumulated charge / discharge amount of the storage battery 141 matches the remaining capacity of the storage battery 141.
  • the controller 103 may determine whether or not the storage battery 141 is normal based on whether or not the accumulated charge / discharge amount of the storage battery 141 matches the remaining capacity of the storage battery 141.
  • the controller 103 acquires the accumulated charge / discharge amount of the storage battery 141 during a predetermined period via the power sensor.
  • the controller 103 may acquire the charge / discharge integrated amount of the storage battery 141 based on the power generation amount of the power generation device 111 and the output amount of the inverter 151.
  • the charge amount is added as a positive value, and the discharge amount is subtracted as a negative value.
  • the predetermined period in which the charge / discharge amount is integrated may be a period from when the state of the storage battery 141 is empty. Alternatively, the predetermined period may be a fixed unit time.
  • the controller 103 acquires the remaining capacity of the storage battery 141.
  • the controller 103 may acquire the remaining capacity of the storage battery 141 by communicating with the storage battery 141.
  • the controller 103 may acquire the voltage of the storage battery 141 and acquire the remaining capacity of the storage battery 141 based on the voltage of the storage battery 141.
  • the controller 103 determines that the storage battery 141 is abnormal. Specifically, when the accumulated charge / discharge amount of the storage battery 141 and the remaining capacity of the storage battery 141 do not match, the controller 103 determines that the state of the storage battery 141 is abnormal. For example, even if it is evaluated that a large amount of electric power is charged and the charge / discharge integrated amount is large, the controller 103 determines that the storage battery 141 is abnormal when it is evaluated that the voltage of the storage battery 141 is small and the remaining capacity is small.
  • the controller 103 determines whether or not each of the storage batteries 142 and 143 is normal.
  • the controller 103 causes the inverters 151 and 153 connected to the storage batteries 141 and 143 to output power, and does not cause the inverter 152 connected to the storage battery 142 to output power. Thereby, the storage battery 142 in an abnormal state is not used.
  • the controller 103 may proportionally distribute the total output amount to the inverters 151 and 153 in accordance with the ratio of the remaining capacities of the storage batteries 141 and 143 in a normal state. Specifically, as shown in FIG. 8, the inverter 151 connected to the storage battery 141 in the 70% charged state is assigned an output amount of 10.5 kW, and the inverter 153 connected to the storage battery 143 in the 30% charged state. Is assigned an output amount of 4.5 kW. Thereby, the whole output amount (15 kW) is proportionally distributed.
  • controller 103 may equally divide the entire output amount into the inverters 151 and 153.
  • FIG. 9 is a relationship diagram illustrating another example of the states of the storage batteries 141, 142, and 143 and the output amounts of the inverters 151, 152, and 153 in the power supply units 121, 122, and 123 illustrated in FIG.
  • the state of health of the storage batteries 141, 142, 143 (SOH: State Of Health) is used as the state of the storage batteries 141, 142, 143.
  • the health state indicates the degree of deterioration, and is represented by the ratio of the current full charge capacity to the initial full charge capacity, for example. That is, as the deterioration progresses, the health condition is lower.
  • the controller 103 acquires the health state of the storage battery 141 by measuring the accumulated discharge amount of the storage battery 141 from the fully charged state to the empty state using the power sensor.
  • the controller 103 may acquire the health state of the storage battery 141 by estimating the health state of the storage battery 141 from the elapsed period from the date of manufacture of the storage battery 141.
  • the controller 103 may acquire the health state of the storage battery 141 by estimating the health state of the storage battery 141 based on information such as the temperature of the storage battery 141.
  • the controller 103 can acquire the health status of the storage batteries 142 and 143.
  • the health state of the storage battery 141 is 70%
  • the health state of the storage battery 142 is 85%
  • the charge state of the storage battery 143 is 95%.
  • a smaller output amount is assigned, and the entire output amounts of the inverters 151, 152, 153 are proportionally distributed according to the health state ratio of the storage batteries 141, 142, 143.
  • the controller 103 causes the inverters 151, 152, and 153 to output power corresponding to these output amounts. Thereby, utilization of the storage battery 141 which has progressed deterioration is suppressed, and progress of deterioration of the storage battery 141 is suppressed.
  • an output amount of 0 (kW) or more is assigned to the inverters 151, 152, and 153.
  • a negative output amount that is smaller than 0 (kW) is assigned to one or more of the inverters 151, 152, and 153. Also good.
  • the inverter 151 converts the power corresponding to the negative output amount, specifically, the surplus power of the inverters 152 and 153 with respect to the load 200 into DC power.
  • the battery 141 is charged.
  • the distributed power supply system 100 can move electric power from the storage batteries 142 and 143 to the storage battery 141. That is, the controller 103 can move electric power between the storage batteries 141, 142, and 143 in accordance with the respective charging states of the storage batteries 141, 142, and 143.
  • FIG. 10 is a block diagram showing an example of the configuration of the controller 103 and the inverters 151, 152, and 153 shown in FIG.
  • the controller 103 causes the inverters 151, 152, and 153 to output power by communicating with the inverters 151, 152, and 153, respectively.
  • the controller 103 transmits a command value indicating the output amount allocated to the inverter 151 to the inverter 151.
  • the inverter 151 outputs power corresponding to the output amount indicated by the command value.
  • the controller 103 can cause the inverter 151 to output power corresponding to the output amount assigned to the inverter 151.
  • the controller 103 can cause the inverters 152 and 153 to output power corresponding to the output amount assigned to the inverters 152 and 153.
  • the controller 103 may transmit a command value including the magnitude and phase of the AC voltage to the inverters 151, 152, and 153.
  • inverters 151, 152, and 153 can generate an AC voltage based on the command value. Therefore, the inverters 151, 152, and 153 can generate synchronized AC voltages even when operating as voltage source inverters (voltage sources) that can independently generate AC voltages.
  • one of the inverters 151, 152, and 153 operates as a voltage source inverter (voltage source), and the rest as a current source inverter (current source) that outputs power synchronized with the magnitude and phase of the AC voltage of the voltage source. It may work. In this case, the command value may not include the magnitude and phase of the AC voltage.
  • FIG. 11 is a block diagram showing another example of the configuration of the controller 103 and the inverters 151, 152, and 153 shown in FIG.
  • the inverter 151 operates as a master inverter
  • each of the inverters 152 and 153 operates as a slave inverter that operates in synchronization with the master inverter.
  • the controller 103 transmits a command value indicating an output amount assigned to each of the inverters 151, 152, and 153 to the inverter 151.
  • Inverter 151 outputs electric power corresponding to the output amount assigned to inverter 151 based on the command value.
  • the inverter 151 transmits a command value indicating the output amount assigned to the inverter 152 to the inverter 152, and transmits a command value indicating the output amount assigned to the inverter 153 to the inverter 153.
  • Each of inverters 152 and 153 outputs electric power corresponding to the assigned output amount based on the command value.
  • the controller 103 can share and output the power supplied to the load 200 to the inverters 151, 152, and 153.
  • the inverter 151 may transmit a command value including the magnitude and phase of the AC voltage to the inverters 152 and 153.
  • inverters 152 and 153 can generate an AC voltage based on the command value. That is, inverters 152 and 153 can operate in synchronization with inverter 151 based on the command value. Therefore, even when the inverters 151, 152, and 153 operate as voltage source inverters (voltage sources) that can independently generate AC voltages, synchronized AC voltages can be generated.
  • the inverter 151 operates as a voltage source inverter (voltage source), and each of the inverters 152 and 153 operates as a current source inverter (current source) that outputs power synchronized with the magnitude and phase of the AC voltage of the voltage source. May be.
  • the command value may not include the magnitude and phase of the AC voltage.
  • droop control may be used in order to share and output the power supplied to the load 200 to the inverters 151, 152, and 153. This will be specifically described below with reference to FIG.
  • FIG. 12 is a graph showing an example of output characteristics of the inverters 151, 152, and 153 shown in FIG.
  • Each of the inverters 151, 152, and 153 has an output characteristic that the frequency is lower as the output amount is larger.
  • the controller 103 transmits a command value indicating an output amount of 7 kW to the inverter 151 operating as a voltage source inverter (voltage source).
  • the inverter 151 outputs electric power corresponding to an output amount of 7 kW based on the command value.
  • inverter 151 generates an AC voltage having a frequency of 49 Hz, and outputs power defined by the generated AC voltage.
  • the inverters 152 and 153 operating as current source inverters (current sources) detect the frequency (49 Hz) of the power output from the inverter 151 from the power line connected to the inverter 151, and are defined by an AC voltage having a frequency of 49 Hz. Output power.
  • the inverter 152 outputs electric power corresponding to an output amount of 5 kW based on the relationship shown in FIG.
  • the inverter 153 outputs electric power corresponding to an output amount of 3 kW based on the relationship shown in FIG.
  • the controller 103 can share and output the power supplied to the load 200 to the inverters 151, 152, and 153.
  • the controller 103 may adjust the output amount in the droop control according to the state of each of the storage batteries 141, 142, and 143. For example, the controller 103 may change the relationship between the frequency and the output amount according to the charge states of the storage batteries 141, 142, and 143. Specifically, the controller 103 may increase the rate of change in the output amount with respect to the change in frequency so that the output amount increases as the remaining capacity increases.
  • the controller 103 can share and output the power supplied to the load 200 to the inverters 151, 152, and 153 according to the states of the storage batteries 141, 142, and 143, respectively.
  • FIG. 12 shows the relationship between the output amount and the frequency, but a voltage may be used instead of the frequency or together with the frequency. That is, each of the inverters 151, 152, and 153 may be associated with an increase in output amount and a decrease in voltage. As a result, the output amount and voltage are adjusted as in the case of the frequency. Further, the increase in output amount does not necessarily have to be associated with the decrease in frequency or voltage. An increase in output amount may be associated with an increase in frequency or voltage.
  • VSG virtual synchronous generator
  • FIG. 13 is a schematic diagram showing a virtual synchronous generator when the inverter 151 shown in FIG. 1 operates as a virtual synchronous generator.
  • the synchronous generator includes a stator and a rotor. And in a synchronous generator, alternating current electric power is produced
  • the inverter 151 operates as a virtual synchronous generator by outputting electric power by simulating the output characteristics of such a synchronous generator. That is, the inverter 151 outputs electric power like a synchronous generator.
  • the inverter 151 calculates the phase of the rotor in the virtual synchronous generator based on the output amount of the inverter 151, and outputs the AC power using the calculated phase as the phase of the AC voltage.
  • the controller 103 transmits a command value indicating the output amount (Pi) assigned to the inverter 151 to the inverter 151.
  • the inverter 151 indicates the amount of change in the angular speed of the rotor in the virtual synchronous generator, with the difference between the output amount (Po) of the power actually output by the inverter 151 and the output amount (Pi) indicated by the command value. Use as a value to calculate the angular velocity of the rotor.
  • the inverter 151 integrates the angular velocity of the rotor and calculates the angular phase of the rotor. Then, inverter 151 uses the calculated angular phase as the phase of the AC power voltage.
  • the inverter 151 can operate as a virtual synchronous generator in accordance with the above operation.
  • the inverters 152 and 153 may operate as a virtual synchronous generator.
  • each of inverter 151,152,153 operates like a synchronous generator.
  • the inverters 151, 152, and 153 operate like a synchronous generator, so that they can synchronize with each other and stably output power.
  • the distributed power supply system 100 described above supplies power to the load 200 from the power supply device 101 including the storage batteries 141, 142, 143, the inverters 151, 152, 153 and the like to the power generation devices 111, 112, 113. Then, the distributed power supply system 100 distributes the electric power supplied to the load 200 to the inverters 151, 152, and 153 according to the respective states of the storage batteries 141, 142, and 143, and outputs them. Thereby, the distributed power supply system 100 can appropriately supply power to the load 200.
  • the number of power generation devices 111, 112, 113, the number of power supply units 121, 122, 123, the number of power supply circuits 131, 132, 133, the number of storage batteries 141, 142, 143, and the inverter 151 , 152 and 153 are three each.
  • the number of these components is not limited to three, and may be two or four or more.
  • the distributed power supply system 100 has been described based on the embodiment, but the present invention is not limited to the embodiment. Embodiments obtained by subjecting the embodiments to modifications conceived by those skilled in the art and other embodiments realized by arbitrarily combining a plurality of components in the embodiments are also included in the present invention.
  • another component may execute a process executed by a specific component.
  • the order in which the processes are executed may be changed, or a plurality of processes may be executed in parallel.
  • the present invention can be realized not only as the distributed power supply system 100 but also as a method including steps (processes) performed by each component constituting the distributed power supply system 100.
  • these steps may be executed by a computer (computer system) included in the distributed power supply system 100.
  • the present invention can be realized as a program for causing a computer to execute the steps included in these methods.
  • the present invention can be realized as a non-transitory computer-readable recording medium such as a CD-ROM on which the program is recorded.
  • each step is executed by executing the program using hardware resources such as a CPU, a memory, and an input / output circuit of a computer. . That is, each step is executed by the CPU obtaining data from a memory or an input / output circuit or the like, and outputting the calculation result to the memory or the input / output circuit or the like.
  • the plurality of components included in the distributed power supply system 100 and the like may be realized as dedicated or general-purpose circuits, respectively. These components may be realized as a single circuit or may be realized as a plurality of circuits.
  • a plurality of components included in the distributed power supply system 100 or the like may be realized as an LSI (Large Scale Integration) that is an integrated circuit (IC). These components may be individually made into one chip, or may be made into one chip so as to include a part or all of them.
  • the LSI may be referred to as a system LSI, a super LSI, or an ultra LSI depending on the degree of integration.
  • the integrated circuit is not limited to an LSI, and may be realized by a dedicated circuit or a general-purpose processor.
  • a programmable FPGA (Field Programmable Gate Array) or a reconfigurable processor in which connection and setting of circuit cells inside the LSI can be reconfigured may be used.
  • a plurality of modes such as the distributed power supply system 100 are shown as an example. These aspects may be appropriately combined. Moreover, the arbitrary structure etc. which were shown by said embodiment may be added. Moreover, the number of components, such as the some power generators 111, 112, 113, the some storage batteries 141, 142, 143, or the some inverter 151, 152, 153, is not restricted to the following example.
  • a distributed power supply system 100 includes a plurality of power generation devices 111, 112, 113, a power supply device 101, and a controller 103, and supplies power to a load 200.
  • Each of the plurality of power generation devices 111, 112, and 113 generates electric power using natural energy.
  • the power generated by the plurality of power generation devices 111, 112, 113 is input to the power supply device 101.
  • the power supply device 101 includes a plurality of power supply circuits 131, 132, 133, a plurality of storage batteries 141, 142, 143, and a plurality of inverters 151, 152, 153.
  • the plurality of power supply circuits 131, 132, 133, the plurality of storage batteries 141, 142, 143, and the plurality of inverters 151, 152, 153 are provided for each of the power generation devices constituting the plurality of power generation devices 111, 112, 113. Contains the elements. Here, these elements are a power supply circuit (131,132,133), a storage battery (141,142,143), and an inverter (151,152,153).
  • the power supply circuit (131, 132, 133) generates power of a predetermined voltage from the power generated by the power generation device (111, 112, 113).
  • the storage battery (141, 142, 143) is charged with power obtained from the power supply circuit (131, 132, 133), and the charged power is discharged from the storage battery (141, 142, 143).
  • the inverters 151, 152, and 153 convert the power obtained from the power supply circuits 131, 132, and 133 and the storage batteries 141, 142, and 143 into alternating current power, and the converted power is loaded into the load 200. Is output to the connected power line.
  • the controller 103 causes the plurality of inverters 151, 152, and 153 to output the power supplied to the load 200 in accordance with the states of the plurality of storage batteries 141, 142, and 143.
  • the distributed power supply system 100 can supply a large amount of power to the load 200 using the plurality of inverters 151, 152, and 153. Furthermore, the distributed power supply system 100 converts the power supplied to the load 200 based on the respective states of the plurality of storage batteries 141, 142, 143 without controlling the DC-DC converter into the plurality of inverters 151, 152, 153. Can be appropriately shared and output. Therefore, the distributed power supply system 100 can appropriately supply power to the load 200.
  • the electric power generating apparatus which comprises the some electric power generating apparatus 111,112,113 means the electric power generating apparatus contained in the several electric power generating apparatus 111,112,113.
  • the controller 103 may cause the plurality of inverters 151, 152, and 153 to output the power supplied to the load 200 according to the state of the remaining capacity of each of the plurality of storage batteries 141, 142, and 143. Thereby, electric power is appropriately output based on the remaining capacity.
  • the controller 103 outputs power to be output to the inverter (151, 152, 153) that converts power obtained from the storage battery (141, 142, 143). It may be small.
  • the controller 103 may cause the plurality of inverters 151, 152, and 153 to output the power supplied to the load 200 in accordance with the remaining capacity ratios of the plurality of storage batteries 141, 142, and 143. Thereby, electric power is appropriately output based on the remaining capacity ratio.
  • the controller 103 converts the power obtained from the storage battery (141, 142, 143) (151, 152, 153). ) May output power. And the controller 103 does not need to output electric power to the said inverter (151,152,153), when the remaining capacity of the said storage battery (141,142,143) is not larger than predetermined
  • the controller 103 supplies power to the inverter (151, 152, 153). It is not necessary to output.
  • the said inverter (151,152,153) is an inverter which converts the electric power obtained from the said storage battery (141,142,143).
  • the controller 103 controls the inverter (151, 152, 153). Electric power may be output.
  • the controller 103 outputs power to be output to the inverter (151, 152, 153) that converts the power obtained from the storage battery (141, 142, 143). It may be small.
  • the output amount of the inverter (151, 152, 153) is adjusted, and electric power is appropriately output.
  • At least one of the plurality of inverters 151, 152, and 153 may operate as a voltage source that outputs power of a predetermined AC voltage.
  • the distributed power supply system 100 can appropriately supply power to the load 200 without depending on other power systems.
  • one inverter (151, 152, 153) among the plurality of inverters 151, 152, 153 may operate as a master inverter.
  • One or more remaining inverters (151, 152, 153) among the plurality of inverters 151, 152, 153 may operate as slave inverters that operate in synchronization with the master inverter.
  • the plurality of inverters 151, 152, and 153 can operate in appropriate synchronization.
  • each of the plurality of inverters 151, 152, and 153 may perform droop control.
  • the droop control includes (i) at least one of voltage and frequency of power output from the inverter (151, 152, 153), and (ii) power output from the inverter (151, 152, 153).
  • the output amount is adapted to a predetermined relationship.
  • the inverters 151, 152, and 153 can adjust the voltage or frequency and the output amount based on a predetermined relationship, and can output power in a coordinated manner.
  • each of the plurality of inverters 151, 152, and 153 may operate as a virtual synchronous generator by outputting power by simulating the output characteristics of the synchronous generator.
  • each of the inverters 151, 152, and 153 can operate like a synchronous generator.
  • the inverters 151, 152, and 153 can synchronize with each other and stably output power.
  • the power supply apparatus 101 and the controller 103 may be packaged in the same package. Thereby, the power supply device 101 and the controller 103 can be used as one integrated device.
  • the control method according to an aspect of the present invention is a control method for the distributed power supply system 100 that supplies power to the load 200.
  • the distributed power supply system 100 includes a plurality of power generation devices 111, 112, 113 and a power supply device 101. Each of the plurality of power generation devices 111, 112, and 113 generates electric power using natural energy.
  • the power generated by the plurality of power generation devices 111, 112, 113 is input to the power supply device 101.
  • the power supply device 101 includes a plurality of power supply circuits 131, 132, 133, a plurality of storage batteries 141, 142, 143, and a plurality of inverters 151, 152, 153.
  • the plurality of power supply circuits 131, 132, 133, the plurality of storage batteries 141, 142, 143, and the plurality of inverters 151, 152, 153 are provided for each of the power generation devices constituting the plurality of power generation devices 111, 112, 113. Contains the elements. Here, these elements are a power supply circuit (131,132,133), a storage battery (141,142,143), and an inverter (151,152,153).
  • the power supply circuit (131, 132, 133) generates power of a predetermined voltage from the power generated by the power generation device (111, 112, 113).
  • the storage battery (141, 142, 143) is charged with power obtained from the power supply circuit (131, 132, 133), and the charged power is discharged from the storage battery (141, 142, 143).
  • the inverters 151, 152, and 153 convert the power obtained from the power supply circuits 131, 132, and 133 and the storage batteries 141, 142, and 143 into alternating current power, and the converted power is loaded into the load 200. Is output to the connected power line.
  • the control method of the distributed power supply system 100 is a control step (S103) in which the power supplied to the load 200 is shared by the plurality of inverters 151, 152, and 153 according to the respective states of the plurality of storage batteries 141, 142, and 143 (S103). including.

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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)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention porte sur un système électrique réparti (100) qui est pourvu de multiples dispositifs de génération d'énergie (111, 112, 113) dont chacun génère de l'énergie électrique à l'aide d'énergie naturelle, et d'un dispositif d'alimentation électrique (101) dans lequel l'énergie générée par les dispositifs de génération d'énergie (111, 112, 113) est introduite. Le dispositif d'alimentation électrique (101) est pourvu de multiples circuits d'alimentation électrique (131, 132, 133), de multiples piles rechargeables (141, 142, 143) et de multiples onduleurs (151, 152, 153). Ce système électrique réparti (100) est en outre pourvu d'un dispositif de commande (103) qui, en fonction des états des piles rechargeables (141, 142 143), amène les multiples onduleurs (151, 152, 153) à fournir, d'une manière partagée, la puissance fournie à une charge (200).
PCT/JP2016/001982 2015-05-18 2016-04-12 Système électrique réparti et procédé de commande de système électrique réparti WO2016185661A1 (fr)

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