WO2012049972A1 - Système d'alimentation comprenant un accumulateur - Google Patents

Système d'alimentation comprenant un accumulateur Download PDF

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Publication number
WO2012049972A1
WO2012049972A1 PCT/JP2011/072271 JP2011072271W WO2012049972A1 WO 2012049972 A1 WO2012049972 A1 WO 2012049972A1 JP 2011072271 W JP2011072271 W JP 2011072271W WO 2012049972 A1 WO2012049972 A1 WO 2012049972A1
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WO
WIPO (PCT)
Prior art keywords
storage battery
discharge
charging
power
current value
Prior art date
Application number
PCT/JP2011/072271
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English (en)
Japanese (ja)
Inventor
中島　武
健仁 井家
博道 浪越
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三洋電機株式会社
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Publication of WO2012049972A1 publication Critical patent/WO2012049972A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/25—Circuit arrangements for protecting against overcurrent
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/28—Circuit arrangements for protecting against abnormal temperature
    • 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

Definitions

  • the present invention relates to a power supply system including a storage battery.
  • a power supply system that combines a commercial power supply and a storage battery has begun to be used. That is, according to the time fluctuation of the load, when the load is large, in addition to the power from the commercial power supply, the discharge power from the storage battery is supplied to the load, and when the load is small, the commercial power supply is charged to the storage battery.
  • the power supply from is averaged over time.
  • a photovoltaic power generation system and a fuel cell system which have been developed in recent years, are also combined with the power supply system.
  • the present invention includes a storage battery and a discharge switch provided in a discharge line that supplies power to a load connected to the storage battery, and a current flowing through the discharge line is equal to or higher than a predetermined first discharge reference current value.
  • a discharge switch When the discharge switch is opened and the current flowing through the discharge line is greater than or equal to a second discharge reference current value smaller than the first discharge reference current value and less than the first discharge reference current value, the discharge switch is opened for a predetermined period.
  • the storage battery is disconnected from the load, the discharge switch is closed after a predetermined period, and the storage battery is reconnected to the load.
  • the discharge switch is closed. It is a power supply system.
  • the present invention includes a storage battery and a charging switch provided on a charging line for charging the storage battery from an electric power source, and when the current flowing through the charging line becomes equal to or higher than a predetermined first charging base current value.
  • the charge switch is opened, and the current flowing through the charge line becomes a second charge reference current value smaller than the first charge reference current value and less than the first charge reference current value, the charge switch is intermittently opened and The power supply system is in a closed state, and the charge switch is closed when the current flowing through the charging line becomes less than the second charging reference current value.
  • the present invention can provide a power supply system capable of preventing performance deterioration due to charging / discharging between storage batteries.
  • the power supply system 100 in the embodiment of the present invention includes a power management system 102, a storage battery assembly 104, a solar battery system 106, and a system power supply 108 as shown in FIG.
  • the power supply system 100 is used to supply power to the load 110.
  • a thick solid line indicates a power flow
  • a thin solid line indicates a signal flow.
  • the solar cell system 106 and the system power supply 108 are used as power sources.
  • the system power supply 108 is a single-phase or three-phase power supply, and may be supplied from an external power company by combining power generated by various power generation methods such as hydropower generation, nuclear power generation, and thermal power generation. it can.
  • the solar cell system 106 can be a large-scale solar power generation system of 1 MW, for example. However, it is not limited to these, You may include other electric power sources, such as a fuel cell and a wind power generation system.
  • the storage battery assembly 104 is provided to supply power corresponding to the required power of the load 110. 2 and 3, the storage battery assembly 104 includes a storage battery pack 44 in which a plurality of storage battery cells 46 are combined, a storage battery control unit 42 in which a plurality of storage battery packs 44 are combined, and a storage battery unit in which a plurality of storage battery control units 42 are combined. As shown in FIG.
  • the storage battery assembly 104 is configured as follows. In the present embodiment, as shown in FIG. 2, eight power converters 28 are provided, the storage battery assembly 104 is divided into eight, and one power converter 28 is assigned to each to perform power management. Each power converter 28 is assigned five storage battery units 40. That is, a total of 40 storage battery units 40 are provided, and each of the 5 storage battery units 40 is connected to one power converter 28.
  • the power line is indicated by a solid line and the signal line is indicated by a broken line.
  • FIG. 3 shows one storage battery unit 40 in FIG. 2 extracted in detail.
  • One storage battery unit 40 is configured by connecting storage battery control units (storage battery pack trains) 42 in which storage battery packs 44 are connected in series as necessary in parallel as necessary.
  • storage battery control units storage battery pack trains
  • five storage battery packs 44 are connected in series to form one storage battery control unit 42
  • four storage battery control units 42 are connected in parallel to form one storage battery unit 40.
  • one storage battery unit 40 is composed of 20 storage battery packs 44.
  • one storage battery pack 44 is shown enlarged.
  • One storage battery unit 40 is provided with one sub-controller 24 and one switch circuit 30 respectively.
  • the switch circuit 30 is provided with one selection switch SW ⁇ b> 1 for each storage battery control unit 42.
  • the storage battery control unit 42 is connected to the discharge line L1 via the selection switch SW1.
  • the selection switch SW1 is controlled to open / close in response to an open / close control signal from the sub-controller 24. That is, the storage battery control unit 42 is a minimum unit of control when the storage battery is connected to the discharge line L1.
  • the switch circuit 30 includes an overcurrent protection circuit 200 that connects the storage battery control unit 42 to the load 110 via the discharge line L1. The function of the overcurrent protection circuit 200 will be described later.
  • the storage battery control unit 42 included in one storage battery unit 40 is connected to the charging line L2 via the resistor R, respectively.
  • the resistance R is preferably set to a resistance value that prevents a large current from adversely flowing between the storage battery control units 42. For example, if the output voltage of the storage battery control unit 42 is in the range of about 200 to 250 volts (V), the resistance R is preferably set to several tens to several hundreds ohms ( ⁇ ).
  • a switch SW2 is provided on the charging line L2.
  • the charge / discharge state between the storage battery control units 42 can be made uniform via the discharge line L1.
  • the state of charge can be equalized more quickly.
  • the switch circuit 30 is also provided with charging switches SW3 and SW4.
  • the charging switch SW3 connected state
  • the power generated by the solar cell system 106 can be supplied to the storage battery control unit 42, and the storage battery control unit 42 can be charged.
  • the power supplied from the system power supply 108 can be supplied to the storage battery control unit 42, and the storage battery control unit 42 can be charged.
  • a current sensor 52 is provided for each storage battery control unit 42 of the storage battery unit 40, and the current of each storage battery control unit 42 is detected.
  • a voltage sensor 54 is provided in each of the 13 sets of parallel storage battery cells 46 connected in series in the storage battery pack 44. The voltage between terminals of the parallel assembly of the storage battery cells 46 is detected by the voltage sensor 54 as a cell voltage. In FIG. 3, only one voltage sensor 54 is shown for the sake of simplicity.
  • the temperature of the storage battery pack 44 is detected by the temperature sensor 56 as the pack temperature.
  • a plurality of temperature sensors 56 may be provided for each storage battery pack 44. These data are acquired by the sub-controller 24.
  • the sub-controller 24 uses these data and the charge / discharge state (SOC: State Of Charge) calculated from these data as unit state data S3 and S6 indicating the state of each storage battery unit 40, and the master controller 22 and the storage battery power management device 12 Output to. Moreover, when the malfunction has arisen in the storage battery unit 40 which comprises the storage battery assembly 104, the sub controller 24 includes the information for specifying the malfunctioning storage battery unit 40 in unit state data S3, S6. To send.
  • SOC State Of Charge
  • the number of combinations of the storage battery cell 46, the storage battery pack 44, the storage battery control unit 42, and the storage battery unit 40 may be appropriately changed according to the specifications of the power supply system 100.
  • a lithium ion battery can be used as a storage battery, you may apply other secondary batteries.
  • a nickel metal hydride battery, a nickel cadmium battery, a manganese battery, or the like may be applied.
  • the power supply system 100 is provided to supply power to a load 110 including general lighting, general air conditioning, kitchen appliances, display cases, air conditioning equipment, and the like of a factory facility.
  • the load 110 is provided with a power management device 110a.
  • the power management device 110a includes a load power management device 10, a storage battery power management device 12, and a total power monitoring device 14.
  • the load power management apparatus 10 acquires load side information data S9 indicating the required power of the load 110.
  • the load-side information data S9 includes the total required power requirement amount of the load 110 necessary for the system controller 20 to be described later to set the overall charge / discharge control command S1.
  • the load power management device 10 is internally an aggregate of four systems of load power management devices.
  • the storage battery power management device 12 includes unit state data S6 indicating the state of each storage battery unit 40 included in the storage battery assembly 104 and power converter management data S7 indicating each state of the power converter 28 included in the power supply system 100. Receive. The storage battery power management device 12 transfers these pieces of information to the total power monitoring device 14.
  • Unit state data S6 includes information used to generate overall charge / discharge control command S1. In the unit state data S6, as described above, when any of the data such as the voltage, temperature, current, and SOC of the storage battery constituting the storage battery assembly and the storage battery unit 40 constituting the storage battery assembly 104 is defective. Contains information indicating these defects.
  • the information regarding the malfunction of the power converter 28 related to the setting of the whole charge / discharge control command S1 is included in the power converter management data S7.
  • the power converter management data S7 For example, when any of the power converters 28 has a problem such as a failure, information for specifying the power converter 28 in which the problem has occurred is included.
  • the total power monitoring device 14 receives the load side information data S9 from the load power management device 10 and the unit state data S6 and the power converter management data S7 from the storage battery power management device 12, and is necessary for charge / discharge control from these information. Extract data.
  • the total power monitoring device 14 outputs the extracted information to the system controller 20 as a system management signal S8.
  • the system management signal S8 is transmitted at a cycle of once every 1 s, for example.
  • the power management system 102 includes a system controller 20, a master controller 22, a sub controller 24, a power converter management unit 26, a power converter 28, and a switch circuit 30, as shown in FIG.
  • the power management system 102 is configured as a hierarchical control system, and includes a top-level system controller 20, a master controller 22 belonging to a lower level of the system controller 20, a power converter management unit 26 and a master belonging to a lower level of the master controller 22. Control is hierarchized from the upper level to the lower level with the sub-controller 24 independent of the controller 22.
  • the system controller 20 has a function of performing integrated power management of the power supply system 100.
  • the master controller 22 is a control device that receives the entire charge / discharge control command S ⁇ b> 1 from the system controller 20 and performs charge / discharge control for the entire storage battery assembly 104.
  • the power converter management unit 26 controls processing such as power conversion and voltage conversion in each of the power converters 28 included in the power supply system 100.
  • the sub-controller 24 is provided for each storage battery unit 40 included in the storage battery assembly 104 and controls charging / discharging in each storage battery unit 40.
  • the system controller 20 receives the system management signal S8 including the load information data S9, the storage battery information signal S6, and the power converter management data S7 from the power management apparatus 110a, and performs charge / discharge control for the entire power supply system 100 based on these information.
  • An overall charge / discharge control command S1 which is a command, is generated and output.
  • the system controller 20 calculates charging / discharging conditions satisfying the total required power requirement of the load 110 from the charging / discharging capacity of the storage battery assembly 104 in consideration of the states of the storage battery unit 40 and the power converter 28. This is transmitted to the master controller 22 as an overall charge / discharge control command S1.
  • the system controller 20 also includes information on the charge / discharge capacity of the storage battery unit 40 connected to the power converter 28 in which the problem has occurred and the charge / discharge capacity of the storage battery unit 40 in which the problem has occurred.
  • a charging / discharging condition satisfying the total required power requirement of the load 110 is obtained and transmitted to the master controller 22 as an entire charging / discharging control command S1.
  • the charge / discharge conditions are indicated by the electric energy and the time, for example, “Charge at XX kW for YY seconds”.
  • a charge upper limit voltage and “charge XX kW until the voltage reaches ZZV” specify a discharge lower limit voltage to discharge to ZZV
  • SOC and charge / discharge May be commanded.
  • the SOC is the SOC (charge / discharge state) in a state where the electric power is stored at the maximum
  • the SOC (charge / discharge state) in each electric power storage state is expressed as a percentage based on the SOC. is there.
  • the entire charge / discharge control command S1 Since the entire charge / discharge control command S1 is irregularly transmitted only when necessary, the entire charge / discharge control command S1 may not be transmitted for a considerably long time in some cases. In such a case, as the master controller 22 that receives the overall charge / discharge control command S1, the system controller 20 may not be able to determine whether the system controller 20 does not transmit because it is normal but not necessary, or does not transmit because there is a problem. There is. Accordingly, a confirmation signal S2 for confirming whether or not the system controller 20 is normal is transmitted from the master controller 22 to the system controller 20 at an appropriate period. The system controller 20 responds with a response signal when normal.
  • the master controller 22 determines that the system controller 20 is normal if a response signal is returned from the system controller 20, and determines that the system controller 20 is defective if no response signal is returned from the system controller 20. it can. An appropriate period may be 10 minutes, for example. When it is determined that there is a defect, processing such as presenting the fact to the user may be performed.
  • the master controller 22 has a function of receiving the overall charge / discharge control command S1 from the system controller 20 and transmitting the aggregate charge / discharge control command S5 for each power converter 28 to the power converter management unit 26.
  • the master controller 22 includes the power converter management data S4 that is the state data of the power converter 28 from the power converter management unit 26 and the sub-controller 24 provided in each storage battery unit 40 included in the storage battery assembly 104.
  • the determination can be made by applying the unit state data S3 or the like to a predetermined conditional expression.
  • the assembly charge / discharge control command S5 is transmitted / received at a cycle of 100 ms, and the power converter management data S4 and the unit state data S3 are transmitted / received at a cycle of 1 s, for example.
  • the overall charge / discharge control command S1 is a command value indicating the overall charge / discharge amount of the storage battery assembly 104 transmitted to the master controller 22, but the aggregate charge / discharge control command S5 is the overall charge / discharge control command S1.
  • the individual command value of the assembly charge / discharge control command S5 is a value when the command value of the overall charge / discharge control command S1 is divided evenly by the number of power converters 28.
  • Other command values may be used.
  • the power converter management data S4 when it is transmitted by the power converter management data S4 that there is a malfunction in any of the power converters 28 controlled by the power converter management unit 26, a part of the charge / discharge control command S1 is charged.
  • the assembly charge / discharge control command S5 with the content of which discharge is restricted is transmitted to the power converter management unit 26.
  • the power converter management data S4 includes information indicating a malfunction of the power converter 28, and the unit state data S3 includes information indicating a malfunction of the storage battery unit 40.
  • the master controller 22 uses the other storage battery units except for the storage battery unit 40 in which the malfunction occurs in the storage battery units 40 connected to the other power converters 28 except for the power converter 28 in which the malfunction occurred.
  • An aggregate charge / discharge control command S5 for controlling each power converter 28 is generated and output to the power converter management unit 26 so that the charge / discharge state required by the overall charge / discharge control command S1 is satisfied.
  • the master controller 22 transmits data having the same content as the power converter management data S4 received from the power converter management unit 26 to the storage battery power management apparatus 12 as power converter management data S7.
  • the power converter management data S7 may be transmitted at a transmission cycle longer than the transmission cycle of the power converter management data S4. For example, when the power converter management data S4 is transmitted every second, the power converter management data S7 may be transmitted every 10 seconds.
  • the power converter management data S7 includes information for 10 times of the power converter management data S4. Of course, other transmission periods may be used, and the transmission periods of the power converter management data S4 and the power converter management data S7 may be the same.
  • the sub-controller 24 is provided for each storage battery unit 40 as described above, and performs open / close control of switches included in the switch circuit 30 provided in each storage battery unit 40 according to the state of each storage battery unit 40.
  • the sub-controller 24 turns on the overcurrent protection circuit 200 and the charge switches SW3 and SW4 (connected state) when the power source (not shown) of the storage battery unit 40 is turned on and the charging / discharging conditions are satisfied, and charging / discharging from the storage battery unit 40 is performed. Start discharging.
  • the sub-controller 24 is detected by a current value detected by a current sensor 52 provided in each storage battery control unit 42, a voltage value detected by a voltage sensor 54, and a temperature sensor 56 provided in each storage battery unit 40.
  • the state of the storage battery pack 44 and the storage battery control unit 42 is determined based on the temperature to be detected and the reference voltage detected by the voltage sensor 60 provided in the discharge line L1, and the switch corresponding to the storage battery control unit 42 according to the determination result SW1 open / close control is performed.
  • the sub-controller 24 is detected by a current value detected by a current sensor 52 provided in each storage battery control unit 42, a voltage value detected by a voltage sensor 54, and a temperature sensor 56 provided in each storage battery unit 40. If it is determined that there is a malfunction in the state of the storage battery pack 44 or the storage battery control unit 42 based on the temperature and the reference voltage detected by the voltage sensor 60 provided in the discharge line L1, a malfunction has occurred.
  • the storage battery control unit 42 including the storage battery pack 44 is disconnected from the discharge line L1. Specifically, a process of opening the switch SW1 (SW1 (1) to SW1 (4)) corresponding to the storage battery control unit 42 including the storage battery pack 44 in which the failure occurs is performed. Further, the sub-controller 24 transmits information indicating the malfunction of the storage battery pack 44 and the storage battery control unit 42 to the master controller 22 and the storage battery power management device 12 as unit state data S3 and S6.
  • the determination of the malfunction is made when the current detected by the current sensor 52 exceeds a threshold calculated from a predetermined conditional expression, when the cell voltage detected by the voltage sensor 54 exceeds a predetermined threshold range, the temperature sensor 56 Can be performed in comparison with a predetermined condition, such as when the pack temperature detected by the above exceeds a predetermined threshold.
  • the sub-controller 24 transmits information indicating the malfunction of the storage battery unit 40 to the master controller 22 and the storage battery power management apparatus 12 as unit state data S3 and S6.
  • the sub-controller 24 transmits data having the same contents as the unit state data S3 transmitted to the master controller 22 to the storage battery power management apparatus 12 as unit state data S6.
  • the unit state data S6 may be transmitted at a transmission cycle longer than the transmission cycle of the unit state data S3.
  • the unit state data S6 may be transmitted every 10 seconds.
  • the unit state data S6 includes information for 10 times of the unit state data S3.
  • other transmission periods may be used, and the transmission periods of the unit state data S3 and the unit state data S6 may be the same.
  • the power converter management unit 26 receives the assembly charge / discharge control command S5 from the master controller 22 and controls each power converter 28 to be controlled.
  • power supply system 100 as shown in FIG. 2, there are eight power converters 28 to be controlled by power converter management unit 26.
  • the present invention is not limited to this, and the number of power converters 28 may be changed as appropriate.
  • the power converter 28 performs power conversion between the AC power of the system power supply 108 and the DC power of the storage battery assembly 104, voltage conversion between the DC voltage of the solar battery system 106 and the DC voltage of the storage battery assembly 104, and the storage battery. It has a function of performing power conversion between the DC power of the assembly 104 and the AC power of the load 110, voltage conversion between the DC voltage of the storage battery assembly 104 and the DC voltage of the load 110, and the like. Specifically, a bidirectional cross current conversion circuit, a bidirectional voltage conversion circuit, and the like are configured as necessary.
  • the power converter management unit 26 charges the storage battery assembly 104 from the solar cell system 106 or the system power supply 108 or discharges the storage battery assembly 104 to the load 110 in accordance with the assembly charge / discharge control command S5.
  • the power conversion and voltage conversion in each power converter 28 are controlled.
  • any of the power converters 28 under the control of the power converter management unit 26 is defective, or when a charge / discharge prohibition command or a standby command is output from the master controller 22, The operation of the defective power converter 28 is set in a standby state, and information indicating the problem of the power converter 28 is transmitted to the master controller 22 as power converter management data S4.
  • the assembly charge / discharge control command S5 is “the first power converter 28 is discharged at 40 kW, the second power converter 28 is If the content is “discharge at 40 kW..., The eighth power converter 28 is discharged at 40 kW”, the power converter management unit 26 supplies power from each power converter 28 to the load 110 at 40 kW. The voltage conversion and power conversion in each power converter 28 are controlled.
  • the assembly charge / discharge control command S5 is “the first power converter 28 is charged at 40 kW, the second power converter 28 is charged at 40 kW, and the eighth power converter 28 is charged at 40 kW”.
  • the power converter management unit 26 performs voltage conversion and power conversion in each power converter 28 such that charging is performed at 40 kW from the solar cell system 106 and the system power supply 108 via each power converter 28. To control.
  • the system controller 20 determines the overall charging / discharging conditions of the storage battery assembly 104 in accordance with the total required power requirement of the load 110 and sets it as the entire charging / discharging control command S1. Then, the master controller 22 performs specific control of each power converter 28 in consideration of the power converter 28 and the storage battery unit 40 in which a failure has occurred so as to satisfy the charge / discharge control command in the overall charge / discharge control command S1.
  • the assembly charge / discharge control command S5 is generated, and each power converter 28 is controlled by the power converter management unit 26 lower than the master controller 22.
  • the power converter management unit 26 does not control the host system controller 20 and the master controller 22, and the power converter 28 and the storage battery unit 40 connected thereto. Process to disconnect. Further, the sub-controller 24 controls connection / disconnection of the storage battery control unit 42 included in each storage battery unit 40 when the storage battery unit 40 has a problem, regardless of control by the host system controller 20 and the master controller 22. I do. As described above, by performing hierarchical control, even if a malfunction occurs in the power converter 28 or the storage battery unit 40, the storage battery assembly 104 can be handled as if it were one battery, as viewed from the system controller 20. it can. Further, it is possible to reduce the processing load of the higher-order control system and flexibly cope with changes in the system configuration.
  • overcurrent protection circuit 200 is provided in switch circuit 30 for each storage battery unit 40.
  • the overcurrent protection circuit 200 includes a discharge switch Q1, switches Q2, Q3, a photovolt U1, a photocoupler U2, a comparator CMP1, a timer element TM1, and a resistor Rx.
  • the discharge switch Q1 can be an FET, and the switches Q2 and Q3 can be bipolar transistors.
  • the resistor Rx can be a substrate resistance formed integrally with the overcurrent protection circuit 200.
  • the overcurrent protection circuit 200 is provided on the discharge line L1 from the storage battery control unit 42 to the load 110, and disconnects the storage battery control unit 42 and the load 110 when an overcurrent flows through the discharge line L1. It has a function.
  • the sub-controller 24 applies a high-level discharge control signal to the control terminal T1.
  • a voltage is applied to the photodiode D1 of the photovolt U1, and the photodiode D1 emits light.
  • the photodiode D1 is paired with the photoelectric conversion element P1, and the voltage at the terminal T2 of the photoelectric conversion element P1 rises due to light emission of the photodiode D1.
  • the discharge switch Q1 is turned on, and the storage battery control unit 42 is connected to the load 110 via the discharge switch Q1 and the resistor Rx.
  • the overcurrent protection circuit 200 is used when the current flowing through the discharge line L1 becomes equal to or greater than a predetermined first discharge reference current value and when the current exceeds a second discharge reference current value smaller than the first discharge reference current value. It has a function to perform two-stage overcurrent protection.
  • the first discharge reference current value is, for example, 900 amperes (A)
  • the second discharge reference current value is, for example, 30 amperes (A).
  • the comparator CMP1 gives an ON signal (low level signal) to the trigger terminal T4 of the timer element TM1 when the voltage of the terminal T3 becomes equal to or higher than the reference voltage Vref1, and starts the timer element TM1.
  • the reference voltage Vref1 is a voltage obtained by dividing the power supply voltage Vcc by the resistors Ra and Rb.
  • a voltage corresponding to the current flowing through the load 110 via the discharge line L1 is input to the terminal T3.
  • a resistor is provided in the discharge line L1, and a voltage generated in the resistor in accordance with a current flowing through the load 110 via the discharge line L1 may be input to the terminal T3.
  • the timer element TM1 is activated for a certain period of time when an on signal is given to the trigger terminal T4, and turns on the switch Q2 for the period of activation.
  • the switch Q2 When the switch Q2 is turned on, the anode side of the photodiode D1 is grounded via the switch Q2, so that the photovolt U1 is turned off, and the discharge switch Q1 is turned off.
  • the storage battery control unit 42 is disconnected from the load 110 during the time when the timer element TM1 is activated.
  • the terminal voltage of the resistor Rx increases, and the switch Q3 is turned on when the current flowing through the discharge line L1 becomes equal to or higher than the first discharge reference current value.
  • the switch Q3 is turned on, the voltage at the terminal T2 is lowered via the photodiode D2 and the switch Q3, and the discharge switch Q1 is turned off. Thereby, the storage battery control unit 42 is disconnected from the load 110.
  • the photodiode D2 of the photocoupler U2 emits light.
  • the photodiode D2 is paired with the phototransistor P2, a current flows through the phototransistor P2 due to light emission of the photodiode D2, and an ON signal is given to the trigger terminal T4 of the timer element TM1. Accordingly, as described above, the photovolt U1 and the discharge switch Q1 are turned off, and the storage battery control unit 42 is disconnected from the load 110 during the time when the timer element TM1 is activated.
  • the discharge switch Q1 is intermittently interrupted by using the timer element TM1 as the necessity of suppressing the discharge. Further, when the current flowing through the discharge line L1 becomes equal to or higher than the first discharge reference current value, it is assumed that an excessive current with high urgency has flowed, and the discharge switch does not go through a circuit that takes time for processing such as the timer element TM1. Q1 is cut off and the discharge from the storage battery control unit 42 is completely stopped.
  • a high level discharge control signal is applied from the sub controller 24 to the control terminal T1, but the master controller 22 controls the control terminal T1.
  • a high-level discharge control signal may be applied to T1.
  • the overcurrent protection circuit 200 is provided between the storage battery control unit 42 and the load 110.
  • the storage battery control unit 42 and the load 110 are connected via an inverter or a converter. In this case, it may be provided between the storage battery control unit 42 and the inverter or converter.
  • the overcurrent protection circuit 200 is provided for each storage battery unit 40, but may be provided in common for a plurality of storage battery units 40 connected to a common load 110.
  • the overcurrent protection circuit 200 is provided from the connection point where the plurality of storage battery control units 40 are connected in parallel to the load 110 in the discharge line L1.
  • the overcurrent protection circuit 200 is preferably controlled by the master controller 22.
  • the sub-controller 24 performs overcurrent protection processing during charging.
  • the sub-controller 24 reads the charging current value flowing through the charging line L2 from the current sensor 62 provided on the charging line L2.
  • the sub-controller 24 has two stages when the current flowing through the charging line L2 becomes equal to or greater than a predetermined first charge reference current value and when the current exceeds a second charge reference current value smaller than the first discharge reference current value.
  • the first charging reference current value is, for example, 200 amperes (A)
  • the second charging reference current value is, for example, 30 amperes (A).
  • the sub-controller 24 connects and disconnects the charging switch SW3 with a predetermined cycle and on-duty when the read charging current value becomes equal to or higher than the second charging reference voltage. Further, when the read charging current value becomes equal to or higher than the first power receiving reference voltage, the sub-controller 24 completely turns off the charging switch SW3.
  • the charging switch SW3 is controlled by the sub-controller 24.
  • the overcurrent protection circuit 202 may be provided on the charging line L2 as with the discharging line L1. Good.
  • the sub-controller 24 may apply a high-level charging control signal to the control terminal T1.
  • the voltage applied to the terminal T3 may be made equal to the reference voltage Vref1 when the current flowing through the charging line L2 becomes the second charging reference current value (30 amperes (A)).
  • the charging switch SW3 or the overcurrent protection circuit 202 is provided for each storage battery unit 40, but is common to the plurality of storage battery units 40 connected to the solar battery system 106 and the system power supply 108. It is good also as a structure provided in.
  • the charging switch SW3 or the overcurrent protection circuit 202 is provided between the connection point where the plurality of storage battery control units 40 are connected in parallel on the charging line L2 to the solar cell system 106 serving as the power source and the system power supply 108. It is done.
  • the charge switch SW3 or the overcurrent protection circuit 202 is preferably controlled by the master controller 22.
  • an overcurrent protection circuit 200 is provided on the discharge line L1, or an overcurrent is provided on the charge line L2.
  • a current protection circuit 202 may be provided.
  • the selection switch SW1 and the switch SW2 may be replaced with the configuration of the overcurrent protection circuit 200. That is, the selection switch SW1 is replaced with the switch Q1 of the overcurrent protection circuit 200 (202), and the opening and closing of the switch Q1 is controlled according to the magnitude of the charge / discharge current of each power storage control unit 42. Further, the switch SW2 is replaced with the switch Q1 of the overcurrent protection circuit 200 (202), and the opening and closing of the switch Q1 is controlled according to the magnitude of the charging current flowing through the charging line L2. At this time, it is preferable that the first charging reference current value and the second charging reference current value are appropriately set to values suitable for each protection.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

L'invention porte sur un système d'alimentation comprenant : des ensembles de commande d'accumulateur (42) ; et un commutateur de décharge (Q1) qui est installé sur une ligne de connexion en parallèle (L1), qui est connectée aux ensembles de commande d'accumulateur (42) et fournit de l'énergie à une charge (110), et qui est agencée entre les ensembles de commande d'accumulateur (42) et la charge (110). Lorsqu'un courant circulant à travers la ligne de connexion en parallèle (L1) devient égal ou supérieur à une première valeur de courant de référence de décharge, le commutateur de décharge (Q1) est amené à être dans un état ouvert. Lorsque le courant circulant à travers la ligne de connexion en parallèle (L1) devient égal ou supérieur à une seconde valeur de courant de référence de décharge, qui est inférieure à la première valeur de courant de référence de décharge, et inférieure à la première valeur de courant de référence de décharge, le commutateur de décharge (Q1) est amené à être dans un état ouvert pendant une période de temps prescrite, pour déconnecter les ensembles de commande d'accumulateur (42) et la charge (110). Le commutateur de décharge (Q1) est amené à être dans un état fermé après que la période de temps prescrite s'est écoulée, pour connecter à nouveau les ensembles de commande d'accumulateur (42) et la charge (110). Lorsque le courant circulant à travers la ligne de connexion en parallèle (L1) devient inférieur à la seconde valeur de courant de référence de décharge, le commutateur de décharge (Q1) est amené à être dans un état fermé.
PCT/JP2011/072271 2010-10-15 2011-09-28 Système d'alimentation comprenant un accumulateur WO2012049972A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2010-233119 2010-10-15
JP2010-233120 2010-10-15
JP2010233119 2010-10-15
JP2010233120 2010-10-15

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WO2012049972A1 true WO2012049972A1 (fr) 2012-04-19

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008013299A1 (fr) * 2006-07-27 2008-01-31 Citizen Holdings Co., Ltd. Dispositif électronique

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008013299A1 (fr) * 2006-07-27 2008-01-31 Citizen Holdings Co., Ltd. Dispositif électronique

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