WO2016084400A1 - Système d'accumulateur et procédé de stockage d'électricité - Google Patents

Système d'accumulateur et procédé de stockage d'électricité Download PDF

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Publication number
WO2016084400A1
WO2016084400A1 PCT/JP2015/061260 JP2015061260W WO2016084400A1 WO 2016084400 A1 WO2016084400 A1 WO 2016084400A1 JP 2015061260 W JP2015061260 W JP 2015061260W WO 2016084400 A1 WO2016084400 A1 WO 2016084400A1
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Prior art keywords
power
storage battery
storage
circuit
output
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PCT/JP2015/061260
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English (en)
Japanese (ja)
Inventor
田中　俊彦
正行 酒井
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株式会社Ｃｏ２Ｏ
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Publication of WO2016084400A1 publication Critical patent/WO2016084400A1/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
    • 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
    • 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
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/10—Photovoltaic [PV]
    • 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
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • 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
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy

Definitions

  • the present invention relates to a storage battery system and a storage method.
  • This application claims priority based on Japanese Patent Application No. 2014-241222 for which it applied to Japan on November 28, 2014, and uses the content here.
  • a cooperation system of photovoltaic power generation and a storage battery is known (see Patent Document 1).
  • the power of photovoltaic power generation (PV) is converted from direct current to alternating current by a power conditioner and output.
  • the storage battery power converter and the storage battery are provided outside the connection portion of the solar battery and the power conditioner.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a storage battery system and a storage method that can realize efficient storage using solar cells.
  • the storage battery system which concerns on 1 aspect of this invention is equipped with a storage battery between a solar cell and a power conditioner.
  • a configuration including a DC-DC converter between the solar battery and the storage battery may be used.
  • a configuration including a DC-AC converter between the solar battery and the storage battery or between the power conditioner and the storage battery may be used.
  • the storage battery system which concerns on 1 aspect of this invention WHEREIN The structure which supplies electric power from the said storage battery to the said solar cell may be used.
  • power generated by the solar battery is stored in a storage battery provided between the solar battery and a power conditioner.
  • efficient power storage can be realized using a solar cell.
  • FIG. 1 is a block diagram showing a schematic configuration of a storage battery system 1 according to an embodiment of the present invention.
  • the storage battery system 1 according to the present embodiment can be applied, for example, to home use, business use, or factory use.
  • a storage battery system 1 includes a photovoltaic (PV) module 11, a storage battery facility 12, a power conditioner (PCS) 13, an indoor load 14, a current detector 15, a system (power system) ) 16 and an indoor load 21.
  • the storage battery facility 12 includes a DC (Direct Current) -DC converter 31, an MPPT (Maximum Power Point Tracking) control circuit 32, a system switching circuit 33, a charging circuit 34, a storage battery charge / discharge switching circuit 35, a storage battery 36 ( A first storage battery), a storage battery 37 (second storage battery), a discharge circuit 38, a booster circuit 39, a DC-AC (Alternating Current) converter 40, and a charge / discharge control unit 41 are provided.
  • DC Direct Current
  • MPPT Maximum Power Point Tracking
  • the indoor load 21 may be the same as or different from the indoor load 14.
  • the storage batteries 36 and 37 various storage batteries may be used.
  • a lead battery or a lithium ion battery may be used.
  • the PV module 11 is connected to the DC-DC converter 31 via a cable.
  • the PV module 11 is connected to the system switching circuit 33 via a PID dedicated circuit.
  • the PCS 13 is connected to the system switching circuit 33 via a cable.
  • the indoor load 14 is connected to the PCS 13 via a cable.
  • the current detection unit 15 is connected to the indoor load 14 via a cable.
  • the current detection unit 15 is connected to the charge / discharge control unit 41 via a cable.
  • the system 16 is connected to the current detection unit 15 via a cable.
  • the indoor load 21 is connected to the DC-AC converter 40 via a cable.
  • the DC-DC converter 31 and the MPPT control circuit 32 are connected so as to form a circuit, and constitute an integrated circuit.
  • the DC-DC converter 31 is connected to the system switching circuit 33 via a cable.
  • the charging circuit 34 is connected to the system switching circuit 33 via a cable.
  • the charging circuit 34 is connected to the storage battery charge / discharge switching circuit 35 via a cable.
  • the discharge circuit 38 is connected to the storage battery charge / discharge switching circuit 35 via a cable.
  • the discharge circuit 38 and the booster circuit 39 are connected so as to form a circuit and constitute an integrated circuit.
  • the booster circuit 39 is connected to the system switching circuit 33 via a cable.
  • the storage battery charge / discharge switching circuit 35 is connected to the storage battery 36 via a cable.
  • the storage battery charge / discharge switching circuit 35 is connected to the storage battery 37 via a cable.
  • the DC-AC converter 40 is connected to a cable that connects the PCS 13 and the system switching circuit 33.
  • the charge / discharge control unit 41 is connected to the charging circuit 34 via a cable.
  • the charge / discharge control unit 41 is connected to the booster circuit 39 via a cable.
  • the charge / discharge control unit 41 is connected to the system switching circuit 33 via a cable.
  • the charge / discharge control unit 41 is connected to the storage battery charge / discharge switching circuit 35 via a cable.
  • a cable is used for connection between the charge / discharge control unit 41 and the circuits 33, 34, 35, 39.
  • the charge / discharge control unit 41 and the above-described circuit The circuit may be connected to form a circuit.
  • the PV module 11 has a configuration in which a plurality of solar cells are modularized.
  • the PV module 11 is configured by arranging a plurality of solar cells in an array, for example.
  • the PV module 11 generates a direct current corresponding to the amount of solar radiation.
  • the PV module 11 outputs the generated direct current to the DC-DC converter 31.
  • the DC-DC converter 31 performs DC-DC conversion (for example, step-up conversion) on the direct current input from the PV module 11 and outputs it to the system switching circuit 33.
  • the MPPT control circuit 32 performs MPPT control.
  • the system switching circuit 33 inputs DC current from the DC-DC converter 31, outputs DC current to the PID dedicated circuit, outputs DC current to the charging circuit 34, inputs DC current from the booster circuit 39, PCS 13 ( And the output of the direct current to the DC-AC converter 40) are switched.
  • the direct current output from the system switching circuit 33 is input to the charging circuit 34.
  • the charging circuit 34 outputs the input direct current to the storage battery charge / discharge switching circuit 35.
  • the storage battery charge / discharge switching circuit 35 outputs the direct current input from the charging circuit 34 to the storage batteries 36, 37 to charge the storage batteries 36, 37, and the direct current discharged (output) from the storage batteries 36, 37. Is switched between the operation of outputting the signal to the discharge circuit 38 and the operation of performing both charging and discharging.
  • the direct current output from the storage battery charge / discharge switching circuit 35 is input to the discharge circuit 38.
  • the discharge circuit 38 outputs the input direct current to the booster circuit 39.
  • the booster circuit 39 boosts the DC current input from the discharge circuit 38 and outputs it to the system switching circuit 33.
  • the direct current output from the system switching circuit 33 is input to the DC-AC converter 40.
  • the DC-AC converter 40 DC-AC converts the input direct current to acquire an alternating current, and outputs the acquired alternating current to the indoor load 21.
  • the indoor load 21 operates by the input alternating current and consumes power.
  • the PCS 13 has a function of a DC-AC converter.
  • the DC current output from the system switching circuit 33 is input to the PCS 13.
  • the PCS 13 performs DC-AC conversion on the input direct current to acquire an alternating current, and outputs the acquired alternating current to the indoor load 14.
  • the indoor load 14 is operated by the input alternating current and consumes power.
  • the current detection unit 15 detects an alternating current output from the indoor load 14.
  • the current detection unit 15 outputs information on the detection result of the alternating current to the charge / discharge control unit 41.
  • the detection result of the alternating current corresponds to the alternating current supplied to the system 16.
  • the charge / discharge control unit 41 controls the system switching circuit 33, the charging circuit 34, the storage battery charge / discharge switching circuit 35, the discharging circuit 38, and the booster circuit 39.
  • the charge / discharge control unit 41 may perform control based on the detection result of the alternating current by the current detection unit 15.
  • route which can be switched in the storage battery system 1 which concerns on this embodiment is demonstrated.
  • the system switching circuit 33 When the power generated by the PV module 11 is output to the PCS 13, the system switching circuit 33 outputs a direct current output from the DC-DC converter 31 to the PCS 13 by the control performed by the charge / discharge control unit 41 (the first step). 1)).
  • the system switching circuit 33 supplies the direct current output from the DC-DC converter 31 to the charging circuit 34 by the control performed by the charge / discharge control unit 41. Switch to the output route (referred to as the second route).
  • the system switching circuit 33 When power stored in the storage batteries 36 and 37 is output to the PCS 13 (and the DC-AC converter 40), the system switching circuit 33 is output from the booster circuit 39 by the control performed by the charge / discharge control unit 41. The path is switched to a path (referred to as a third path) for outputting the current to the PCS 13 (and the DC-AC converter 40).
  • the system switching circuit 33 When the electric power stored in the storage batteries 36 and 37 is output to the PV module 11 through the PID dedicated circuit, the system switching circuit 33 is output from the booster circuit 39 by the control performed by the charge / discharge control unit 41. The current is switched to a path (referred to as a fourth path) for outputting to the PV module 11 via the PID dedicated circuit.
  • any two or more than three routes may be switched simultaneously.
  • a function for turning on / off the connection state between the system switching circuit 33 and the PCS 13 and the system switching circuit 33 and the DC-AC A switch having a function of turning on and off the connection state with the converter 40 may be provided.
  • the direct current output from the system switching circuit 33 can be output to either the PCS 13 or the DC-AC converter 40. Note that ON represents a connected state, and OFF represents a disconnected state (not connected).
  • charging from the PV module 11 to the storage batteries 36 and 37 is performed without charging the storage batteries 36 and 37 from the system 16.
  • a DC-DC converter 31 is provided upstream of the storage batteries 36 and 37 (on the PV module 11 side), and charging to the storage batteries 36 and 37 is controlled by the MPPT control circuit 32, and a discharge circuit 38 and a boost circuit 39 are provided.
  • the discharge from the storage batteries 36 and 37 is controlled.
  • power is transmitted to the grid 16 via the PCS 13.
  • a configuration in which the capacity of the PV module 11 is larger than the capacity of the PCS 13 may be used.
  • the power generated by the PV module 11 is accumulated in the storage batteries 36 and 37 in the daytime. Then, the storage batteries 36 and 37 are discharged in a time zone in which the power purchase is desired to be peak cut, thereby suppressing an increase in the demand value of the power purchase.
  • the time zone in which power purchase is desired to be peak cut may be arbitrary, for example, a time zone in which the power consumption by the indoor load 14 is large, a time zone in which the solar radiation intensity is low, or a time zone in which both are satisfied.
  • FIGS. 2A, 2B, and 2C are diagrams for explaining the peak cut mode.
  • the horizontal axis represents time, and the vertical axis represents power consumption.
  • An example of the daily load curve 1001 is shown.
  • a portion exceeding the predetermined power consumption P ⁇ b> 1 (referred to herein as a peak portion) is supplemented by the power stored in the storage batteries 36 and 37.
  • the peak power is peak-cut by the power stored in the storage batteries 36 and 37.
  • FIG. 2B the horizontal axis represents time, and the vertical axis represents solar cell output (electric power).
  • An example of the solar cell output curve 1002 is shown.
  • the solar cell outputs power generated by the PV module 11
  • the horizontal axis represents time
  • the vertical axis represents output from the storage batteries 36 and 37 (power output).
  • An example of the peak cut discharge output curve 1003 is shown. Electric power that needs to be supplemented at the peak portion is discharged from the storage batteries 36 and 37 and supplied to the grid 16.
  • ⁇ Output stabilization mode> In the output stabilization mode, during the daytime, when there is a fluctuation in which the amount of power generated by the PV module 11 suddenly decreases while performing power generation by the PV module 11 and power storage to the storage batteries 36, 37, Discharge to supplement power.
  • the fluctuation in which the power generation amount decreases rapidly includes, for example, fluctuation when the amount of solar radiation decreases rapidly.
  • the stabilized power is stored in the storage batteries 36 and 37, and when sunshine fluctuations occur at that time, the storage batteries 36 and 37 can be discharged to stabilize the output power of the PCS 13.
  • FIG. 3 is a diagram for explaining the output stabilization mode.
  • the horizontal axis represents time
  • the vertical axis represents output (output of electric power combining the PV module 11 and the storage batteries 36 and 37).
  • An example of the output curve 1101 of the solar battery and an example of the complementary power 1102 by the storage batteries 36 and 37 are shown.
  • the batteries 36 and 37 are discharged by the fluctuations.
  • ⁇ Output smoothing mode> In the output smoothing mode, only a certain amount of power generated by the PV module 11 in the daytime is output (transmitted) to the system 16. The generated power exceeding the certain power is stored in the storage batteries 36 and 37. When the amount of solar radiation decreases, the batteries 36 and 37 are discharged for a certain time.
  • FIG. 4 is a diagram for explaining the output smoothing mode.
  • the horizontal axis represents time
  • the vertical axis represents output (power output).
  • An example of an output curve 1201 of the solar battery and an example of a discharge line 1202 by the storage batteries 36 and 37 are shown.
  • the amount of power output to the grid 16 is fixed to a constant value P2.
  • the storage batteries 36 and 37 are charged with the power generated by the PV module 11, and further, the power is supplied to the system 16 with the power generated by the PV module 11. At night, power is not supplied from the PV module 11 to the system 16 but from the storage batteries 36 and 37 to the system 16.
  • the load on the facilities of the power company can be reduced.
  • ⁇ Independent power supply mode In the independent power supply mode, the power stored in the storage batteries 36 and 37 is discharged for use as an independent power supply during a power failure.
  • FIG. 5 is a diagram for explaining the independent power supply mode.
  • the horizontal axis represents time
  • the vertical axis represents output (power output).
  • a curve 1301 of all power generation amounts charged in the storage batteries 36 and 37 in the daytime and a line 1302 of electric energy discharged from the storage batteries 36 and 37 in an arbitrary time zone are shown.
  • the time zone may be, for example, noon or night. In the daytime, it was assumed that autonomous operation was possible only by the power generation by the PV module 11.
  • FIG. 6 is a diagram for explaining the virtual independent power supply mode.
  • the horizontal axis represents time, and the vertical axis represents output (power output).
  • An example of the solar cell output curve 1401 and an example of the power consumption curve 1402 are shown.
  • the discharge current from the storage batteries 36 and 37 is controlled while monitoring the power consumption and the purchased power.
  • the storage batteries 36 and 37 are charged with the power generated by the PV module 11, and further, the power is supplied to the system 16 with the power generated by the PV module 11.
  • power is not supplied from the PV module 11 to the system 16 but from the storage batteries 36 and 37 to the system 16.
  • a reverse bias voltage is supplied to the PV module 11 at a predetermined timing.
  • the predetermined timing is, for example, a timing at which occurrence of PID in the PV module 11 is detected or a regular timing. By such power supply, the PV module 11 deteriorated due to PID can be recovered.
  • a DC-DC converter and a PID recovery controller switching device are connected in parallel between the PV module 11 and the PCS 13, and between the PCS 13 and the DC-DC converter (and PID recovery controller switching device).
  • a configuration in which the storage batteries 36 and 37 are connected may be employed.
  • the PID recovery controller switching unit switches whether to execute PID recovery.
  • a configuration may be used in which the DC-DC converter 31 is used and the system switching circuit 33 is provided with a PID recovery controller switching device.
  • a DC-DC converter and a PID recovery controller switch are connected in parallel to the storage batteries 36 and 37, the DC-DC converter and the PCS are connected, and the PID recovery controller switch and the PV module 11 are connected. May be used.
  • ⁇ Night shift mode> In the night shift mode, all the electric power generated by the PV module 11 is stored in the storage batteries 36 and 37 in the daytime, and the storage batteries 36 and 37 are discharged at an arbitrary time zone at night. Thereby, the electric power from the storage batteries 36 and 37 can be supplied to the system
  • the present invention may be applied to a home or office that is at home during the day and has a large amount of electricity used.
  • FIG. 7 is a diagram for explaining the night shift mode.
  • the horizontal axis represents time
  • the vertical axis represents output (power output).
  • a curve 1501 of all power generation amounts charged in the storage batteries 36 and 37 in the daytime and a power amount line 1502 discharged from the storage batteries 36 and 37 in an arbitrary time zone at night are shown.
  • the storage batteries 36 and 37 are provided between the solar battery (PV module 11) and the power conditioner (PCS 13). Therefore, since it is possible to store the electric power generated by solar power while maintaining a direct current, discharge loss can be suppressed. Moreover, since the direct current output from the solar battery is transmitted to the storage batteries 36 and 37 without being converted into an alternating current, the system configuration can be simplified, the system can be stabilized, and the electrical work can be simplified. Since photovoltaic power generation cannot control fluctuations in output depending on sunlight, it is important to stabilize the output as in this embodiment.
  • the number of inverters can be reduced, and the system configuration can be simplified, the system can be stabilized, and the electrical work can be simplified.
  • the storage battery system 1 which concerns on this embodiment, since the storage batteries 36 and 37 are provided between a solar cell (PV module 11) and a power conditioner (PCS13), from the electric power generated by a solar cell, and the storage batteries 36 and 37, It is possible to output one or both of the discharge power to the system 16 via the PCS 13.
  • efficient power storage can be realized using the solar battery.
  • the DC-DC converter 31 is provided between the solar battery (PV module 11) and the storage batteries 36 and 37. Therefore, the voltage can be stabilized between the PV module 11 and the storage batteries 36 and 37.
  • the DC-DC converter 31 can suppress the fluctuation of the voltage and reduce the influence of the fluctuation of the output due to the shadow.
  • the DC-AC converter 40 is provided between the power conditioner (PCS 13) and the storage batteries 36 and 37. Therefore, one or both of the power generated by the PV module 11 and the power stored in the storage batteries 36 and 37 can be supplied to the load (in the present embodiment, the indoor load 21). For example, even when the PCS 13 stops during a power failure, one or both of the power generated by the PV module 11 and the power stored in the storage batteries 36 and 37 can be supplied to the load.
  • a DC-AC converter may be provided between the solar cell (PV module 11) and the storage batteries 36 and 37 and connected to a load. In this configuration, the same effect can be obtained.
  • a DC-AC converter is provided between the solar battery (PV module 11) and the storage batteries 36, 37 and connected to a load, and the power conditioner (PCS 13) and the storage batteries 36, 37 are connected to each other.
  • a DC-AC converter may be provided between them and connected to a load.
  • the power conditioner (PCS 13) is equipped with a self-sustaining operation function, it is possible to supply power to the load using the power stored in the storage batteries 36 and 37 during a power failure.
  • a predetermined switch provided on the PCS 13 is switched to self-sustained operation, so that the power stored in the storage batteries 36 and 37 is supplied to the load using an outlet provided in the PCS 13. Is possible.
  • the storage battery system 1 electric power is supplied from the storage batteries 36 and 37 to the solar battery (PV module 11).
  • the DC power from the storage batteries 36 and 37 can be supplied to the PV module 11 as DC, which is efficient. Thereby, PID generated in the PV module 11 can be reduced and the PV module 11 can be recovered.
  • the two storage batteries 36 and 37 are charged or discharged at the same time.
  • the charging or discharging timing of one storage battery 36 and the charging or discharging of the other storage battery 37 are performed.
  • the timing may be different.
  • a configuration may be used in which the timing of charging or discharging one storage battery 36 and the timing of charging or discharging the other storage battery 37 can be switched.
  • the storage batteries 36 and 37 and the control circuit are integrated.
  • the storage batteries 36 and 37 are not necessarily integrated with the control circuit.
  • only the storage batteries 36 and 37 are included. May be installed separately.
  • a configuration including only one storage battery or a configuration including three or more storage batteries may be used.
  • the DC-DC converter 31 and the MPPT control circuit 32 can be provided outside the storage battery facility 12.
  • the DC-DC converter 31 and the MPPT control circuit 32 may be provided in a junction box (a junction box outside the storage battery facility 12).
  • the PV module 11, the DC-DC converter 31 (and the MPPT control circuit 32) in the connection box, and the system switching circuit 33 in the storage battery facility 12 are connected in this order.
  • a variable discharge circuit may be used instead of the discharge circuit 38.
  • a system switching circuit capable of bidirectional switching (system bidirectional switching circuit) may be used. The system bidirectional switching circuit can switch between the input from the DC-DC converter 31 and the output to the PCS 13, for example.
  • SYMBOLS 1 ... Storage battery system, 11 ... PV module (solar cell), 12 ... Storage battery equipment, 13 ... PCS (power conditioner), 14, 21 ... Indoor load, 15 ... Current detection part, 16 ... System

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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)
  • Secondary Cells (AREA)

Abstract

L'invention concerne un système d'accumulateur qui comprend des accumulateurs (36, 37) entre une pile solaire (11) et un conditionneur d'énergie (13).
PCT/JP2015/061260 2014-11-28 2015-04-10 Système d'accumulateur et procédé de stockage d'électricité WO2016084400A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014241222A JP2016103915A (ja) 2014-11-28 2014-11-28 蓄電池システムおよび蓄電方法
JP2014-241222 2014-11-28

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JP2020043748A (ja) * 2018-09-12 2020-03-19 東芝Ｉｔコントロールシステム株式会社 電力変換システム

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JP7064330B2 (ja) * 2017-12-27 2022-05-10 大和ハウス工業株式会社 電力供給システム
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