WO2016152177A1 - Système d'accumulation d'électricité - Google Patents

Système d'accumulation d'électricité Download PDF

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Publication number
WO2016152177A1
WO2016152177A1 PCT/JP2016/050083 JP2016050083W WO2016152177A1 WO 2016152177 A1 WO2016152177 A1 WO 2016152177A1 JP 2016050083 W JP2016050083 W JP 2016050083W WO 2016152177 A1 WO2016152177 A1 WO 2016152177A1
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WIPO (PCT)
Prior art keywords
power
current
output
commercial
charging
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PCT/JP2016/050083
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English (en)
Japanese (ja)
Inventor
貴之 櫻井
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Fdk株式会社
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Publication of WO2016152177A1 publication Critical patent/WO2016152177A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems

Definitions

  • the present invention relates to a power storage system using a plurality of storage batteries.
  • a power storage system that can store and discharge power, it is possible to supply power to the load device for a certain period even during a power failure.
  • a power storage system when AC power is supplied from a commercial power source to a load device, the AC power is branched and received, converted into DC power via a converter, and then charged to a storage battery by a charging circuit. .
  • the power storage system converts the power charged in the storage battery into AC power using an inverter, and supplies AC power to the load device.
  • a changeover switch or the like is used so that power is supplied from a commercial power source during power transmission and from a storage battery during a power failure.
  • the above-described inverter needs to be constantly driven.
  • Patent Document 1 discloses a power storage system that can select a storage battery to be discharged by detecting the state of each storage battery. More specifically, this power storage system detects and sequentially updates information such as the state of charge of each storage battery and the presence / absence of a failure, and in the event of a power failure, the redundant control mechanism selects a storage battery to be discharged based on this information and the power demand of the load. At this time, the power storage system detects the power demand in the load device by providing a load output detection mechanism between the inverter and the changeover switch on the path for supplying power from the storage battery to the load device.
  • the commercial power supply generally supplies power with the rated current of the contracted amperage.
  • the storage battery, charging circuit, inverter, and the like included in the above-described power storage system to which this power is supplied consumes power during charging.
  • the load device to which power from the commercial power source is similarly supplied cannot receive the power of the rated current as it is, and receives the power by the current obtained by subtracting the internal current consumption of the power storage system from the rated current.
  • the capacity of the power storage system is increased, the number of storage batteries is increased, whereby the internal current consumption is further increased, and the current that can be supplied to the load device is further decreased. For this reason, even if the current required by the load device is equal to or less than the rated current, the current that can be supplied to the load device may not be sufficient.
  • the present invention has been made in view of such a situation, and an object of the present invention is to provide a power storage system that reduces a possibility that a current supplied to a load device is insufficient due to an internal current consumption.
  • a first aspect of the present invention includes a plurality of storage batteries, a charging unit that converts AC power supplied from a commercial AC power source into DC power and charges the plurality of storage batteries, and a DC that is supplied from the plurality of storage batteries.
  • a power converter that converts power into AC power
  • an output unit that selectively outputs either AC power supplied from a commercial AC power supply or AC power output by the power converter to a load device, and the output unit
  • a current detection unit for detecting the output current of the power supply, and a control unit, wherein the control unit outputs AC power output from the power converter to the load device while detecting a power failure of the commercial AC power supply.
  • the output unit is controlled on the condition that the output current of the output unit is not less than a first current threshold value and less than a second current threshold value while a power failure of a commercial AC power supply is not detected.
  • Output power The number of storage batteries that allow charging of the plurality of storage batteries is increased or decreased according to the size of the storage battery, and all of the plurality of storage batteries are provided on condition that the output current of the output unit is equal to or greater than the second current threshold. It is an electrical storage system which prohibits charge of the storage battery.
  • AC power supplied from commercial AC power is converted into DC power by a charging unit and then charged to a plurality of storage batteries. Moreover, the DC power discharged from the plurality of storage batteries is converted into AC power by the power converter.
  • the output unit selectively supplies either AC power from the power converter or AC power supplied from a commercial AC power source to the load device.
  • a current detection unit between the output unit and the load device detects a current supplied from the output unit to the load device.
  • the control unit monitors the commercial AC power supply for power failure, and performs control to switch the output unit so that power can be supplied from the power converter to the load device when a power failure occurs. Further, the control unit maintains the output unit in a state where power is supplied from the commercial AC power source to the load device during a normal time when no power failure occurs.
  • the control unit checks whether the output current detected by the current detector is greater than or equal to the first current threshold and less than the second current threshold.
  • the first current threshold value is a current threshold value set lower than a current value obtained by subtracting the total internal current consumption of the power storage system from the rated current of the commercial power source.
  • the second current threshold value is a current threshold value set equal to the current value obtained by adding the current consumed when all the storage batteries are charged simultaneously to the first current threshold value.
  • control unit is provided with a storage battery that permits charging when the output current increases, provided that the value of the output current detected by the current detector is within a range that is greater than or equal to the first current threshold and less than the second current threshold.
  • control is performed to increase the number of storage batteries that are allowed to be charged. Further, when the value of the output current becomes equal to or greater than the second current threshold, charging of all the storage batteries is prohibited.
  • the internal current consumption in the power storage system can be increased or decreased in accordance with the increase or decrease in the output current supplied to the load device, and the current that can be supplied to the load device as the current required by the load device increases. Can be raised step by step.
  • the output current of the output unit is equal to or greater than the first current threshold.
  • a storage system that selectively switches the storage batteries that allow charging of the plurality of storage batteries in order under the condition that the storage battery is less than a second current threshold.
  • the control unit When the output current of the output unit is greater than or equal to the first current threshold and less than the second current threshold, the control unit increases or decreases the number of storage batteries that are allowed to be charged according to the magnitude of the current. At this time, the control unit performs control so that charging is not permitted only to a specific storage battery by selectively sequentially replacing storage batteries that permit charging. Thereby, a plurality of storage batteries can be charged evenly.
  • the charging unit corresponds to each storage battery of the plurality of storage batteries, and operates with AC power supplied from a commercial AC power source.
  • the control unit is provided that the output current of the output unit is greater than or equal to the second current threshold and less than the third current threshold while the power failure of the commercial AC power supply is not detected.
  • the number of charging circuits that supply AC power from the commercial AC power supply of the plurality of charging circuits is increased or decreased according to the magnitude of the output current of the output unit, and the output current of the output unit is equal to or greater than the third current threshold value.
  • This is a power storage system that cuts off all the supply of AC power from a commercial AC power source to the plurality of charging circuits on the condition that
  • the charging unit included in the electricity storage system is composed of a plurality of charging circuits that operate with commercial AC power.
  • Each charging circuit converts AC power supplied from a commercial AC power source into DC power, and charges a storage battery corresponding to each charging circuit.
  • the control unit checks whether the output current detected by the current detector is greater than or equal to the second current threshold and less than the third current threshold.
  • the third current threshold value is a current threshold value set equal to the current value obtained by adding the current consumed by all the charging circuits of the power storage system to the second current threshold value.
  • the control unit supplies power from the commercial AC power source when the output current increases on condition that the value of the output current detected by the current detection unit is equal to or greater than the second current threshold and less than the third current threshold.
  • control is performed to increase the number of charging circuits that supply power from the commercial AC power supply. Further, when the value of the output current becomes equal to or greater than the third current threshold, the supply of AC power to all the charging circuits is cut off.
  • the control unit Even if charging of all the storage batteries is prohibited due to this control by the control unit, even if the current required by the load device increases, the internal current consumption in the power storage system is adjusted according to the increase or decrease in the output current supplied to the load device. As the current required by the load device increases, the current that can be supplied to the load device can be increased stepwise.
  • the third aspect of the present invention it is possible to provide a power storage system that further reduces the possibility that the current supplied to the load device due to the internal current consumption is insufficient as compared with the first or second aspect of the present invention. The effect that it can be obtained.
  • a plurality of storage batteries a charging unit that converts AC power supplied from a commercial AC power source into DC power and charges the plurality of storage batteries, and DC supplied from the plurality of storage batteries.
  • a power converter that converts power into AC power
  • an output unit that selectively outputs either AC power supplied from a commercial AC power supply or AC power output by the power converter to a load device, and the output unit
  • a plurality of charging circuits that correspond to each storage battery of the plurality of storage batteries and operate with AC power supplied from a commercial AC power source.
  • the control unit controls the output unit so that the AC power output from the power converter is output to the load device while detecting a power failure of the commercial AC power source, Power outage
  • the commercial AC power supply of the plurality of charging circuits according to the magnitude of the output current of the output unit, on the condition that the output current of the output unit is greater than or equal to a lower limit current threshold and less than the upper limit current threshold
  • the number of charging circuits that supply AC power is adjusted to increase or decrease, and all AC power from the commercial AC power source to the plurality of charging circuits is cut off on condition that the output current of the output unit is equal to or greater than the upper limit current threshold value. It is a power storage system.
  • AC power supplied from a commercial AC power source is converted into DC power by a charging unit and then charged to a plurality of storage batteries. Moreover, the DC power discharged from the plurality of storage batteries is converted into AC power by the power converter.
  • the output unit selectively supplies either AC power from the power converter or AC power supplied from a commercial AC power source to the load device.
  • a current detection unit between the output unit and the load device detects a current supplied to the load device.
  • the control unit monitors the commercial AC power supply for power failure, and performs control to switch the output unit so that power can be supplied from the power converter to the load device when a power failure occurs. Further, the control unit maintains the output unit in a state where power is supplied from the commercial AC power source to the load device during a normal time when no power failure occurs.
  • the control unit checks whether the output current detected by the current detector is greater than or equal to the lower limit current threshold and less than the upper limit current threshold.
  • the lower limit current threshold value is a current threshold value set lower than a current value obtained by subtracting the total internal current consumption of the power storage system from the rated current of the commercial power source.
  • the upper limit current threshold is a current threshold set equal to the current value obtained by adding the current consumed when all the storage batteries are charged simultaneously and the current consumed by all the charging circuits to the lower limit current threshold.
  • the control unit reduces the number of charging circuits that supply power from the commercial AC power source when the output current increases, provided that the value of the output current detected by the current detector is within this range, and outputs When the current decreases, control is performed to increase the number of charging circuits that supply power from the commercial AC power supply. Further, when the value of the output current becomes equal to or greater than the upper limit current threshold, the supply of AC power to all charging circuits is cut off.
  • the internal current consumption in the power storage system can be increased or decreased in accordance with the increase or decrease in the output current supplied to the load device, and the current that can be supplied to the load device as the current required by the load device increases. Can be raised step by step.
  • the fourth aspect of the present invention it is possible to provide an operation and effect that it is possible to provide a power storage system that can reduce the possibility that the current supplied to the load device is insufficient due to the internal current consumption.
  • ⁇ Fifth aspect of the present invention> in the above-described fourth aspect of the present invention, while the control unit does not detect a power failure of the commercial AC power supply, the output current of the output unit is equal to or higher than a lower limit current threshold value.
  • a power storage system that selectively and sequentially switches charging circuits that supply AC power from commercial AC power supplies of the plurality of charging circuits on condition that the current is less than a current threshold.
  • the control unit When the output current of the output unit is greater than or equal to the lower limit current threshold and less than the upper limit current threshold, the control unit increases or decreases the number of storage batteries that are allowed to be charged according to the magnitude of the current. At this time, the control unit performs control so that only a specific storage battery is not allowed to be charged by selectively switching a charging circuit that supplies AC power from a commercial AC power supply. Thereby, a plurality of storage batteries can be charged evenly.
  • any of the plurality of charging circuits can be used while the control unit does not detect a power failure of the commercial AC power supply.
  • the power converter operates with DC power output from the charging circuit to which the commercial AC power is supplied, and AC power from the commercial AC power to the plurality of charging circuits is In the state where all the supply is cut off, the power conversion device operates with the DC power supplied from the plurality of storage batteries.
  • the operation of the power conversion device is maintained even when the power supply to all the charging circuits is all cut off. Therefore, AC power can be supplied to the load device without delay when a power failure occurs.
  • the present invention it is possible to provide a power storage system that reduces the possibility that the current supplied to the load device is insufficient due to the internal current consumption.
  • FIG. 6 is a relationship diagram between an output current and an input current of a power storage system according to a second embodiment of the present invention, and shows a change in the input current when the internal current consumption is controlled by a bold line.
  • FIG. 1 is a circuit diagram showing a configuration of a power storage system 1 according to the present invention.
  • the power storage system 1 is connected to the commercial power source 2 and receives AC power from the commercial power source 2 during normal times when no power failure occurs.
  • the power storage system 1 is connected to the load device 3 and supplies AC power to the load device 3.
  • the power storage system 1 includes a plurality of storage batteries B1 to B3, a charging unit 12, an inverter 13 as a “power conversion device”, a switch 14 as an “output unit”, a current detection unit 15, a control unit 16, an internal power supply 17, and a plurality of Diodes D1 to D6 are provided.
  • Charging unit 12 includes a plurality of charging circuits 121-123.
  • the power storage system 1 will be described with a configuration including three storage batteries B1 to B3 and three charging circuits 121 to 123.
  • this is only an example, and the number of each is not limited thereto.
  • the charging circuits 121 to 123 are supplied with AC power from the commercial power source 2.
  • Charging circuit 121 includes a converter circuit (not shown) that converts AC power into DC power, and charges corresponding storage battery B1.
  • the output of the charging circuit 121 is also connected to the inverter 13 through the diode D1 so that DC power can be supplied to the inverter 13 even when the storage battery B1 is fully charged or charging is prohibited.
  • the electric power charged in the storage battery B1 is supplied to the inverter 13 through the diode D2.
  • the diodes D1 and D2 are provided to prevent the storage battery B1 from being charged with the power of the other storage batteries B2 and B3.
  • the charging circuit 122 includes a converter circuit (not shown) that converts AC power into DC power, and charges the corresponding storage battery B2.
  • the output of the charging circuit 122 is also connected to the inverter 13 through the diode D3 so that DC power can be supplied to the inverter 13 even when the storage battery B2 is fully charged or charging is prohibited.
  • the electric power charged in the storage battery B2 is supplied to the inverter 13 through the diode D4.
  • the diodes D3 and D4 are provided to prevent the storage battery B2 from being charged with the power of the other storage batteries B1 and B3.
  • the charging circuit 123 includes a converter circuit (not shown) that converts AC power into DC power, and charges the corresponding storage battery B3.
  • the output of the charging circuit 123 is also connected to the inverter 13 through the diode D5 so that DC power can be supplied to the inverter 13 even when the storage battery B3 is fully charged or charging is prohibited.
  • the electric power charged in the storage battery B3 is supplied to the inverter 13 through the diode D6.
  • the diodes D5 and D6 are provided to prevent the storage battery B3 from being charged with the power of the other storage batteries B1 and B2.
  • the inverter 13 converts DC power into AC power and outputs it to the switch 14.
  • the switch 14 selectively outputs AC power supplied from the commercial power source 2 or AC power supplied from the inverter 13 to the load device 3.
  • the current detector 15 measures the current of the AC power output to the load device 3 and constantly monitors the current required by the load device 3.
  • the control unit 16 is a known microcomputer control circuit, and is connected to all the components included in the power storage system 1 (not shown).
  • the control unit 16 acquires connection destination information and controls their operations.
  • the control unit 16 detects the occurrence of a power failure by constantly monitoring the power from the commercial power source 2.
  • the internal power supply 17 converts AC power supplied from the commercial power supply 2 into DC power and supplies it to the control unit 16.
  • the control unit 16 performs control to switch the switch 14 so that AC power received from the commercial power supply 2 by the power storage system 1 is supplied to the load device 3 during normal times when no power failure occurs. In addition, all subsequent descriptions are those in normal times.
  • Storage batteries B1 to B3, charging circuits 121 to 123, inverter 13, control unit 16, etc. all consume power when energized. Therefore, the power storage system 1 supplies the current required by the load device 3 and the total current consumed by the power storage system 1 so that the current does not exceed the rated current of the commercial power supply 2 (for example, 15 A here). There is a need. Therefore, the upper limit of the current that the power storage system 1 can supply to the load device 3 is a current obtained by subtracting the internal current consumption of the power storage system 1 from the rated current.
  • the upper limit of the current value assumed for the load device 3 is generally set based on the rated current. For this reason, when the internal current consumption increases as the capacity of the power storage system 1 increases, the current that can be supplied to the load device 3 may decrease unexpectedly. Therefore, the power storage system 1 according to the present invention reduces the internal current consumption of the power storage system 1 stepwise as the current required by the load device 3 increases in order to reduce the possibility that the current supplied to the load device 3 will be insufficient. Control to decrease. Specific control will be described below.
  • FIG. 2 illustrates the relationship between the output current and the input current of the power storage system 1 according to the first embodiment of the present invention, and the change in the input current when the internal current consumption is controlled is indicated by a bold line.
  • the horizontal axis represents the output current
  • the vertical axis represents the input current.
  • the change in the input current is a straight line shown by a thin solid line.
  • the output current values Ia to Ig are current thresholds of the output current determined in advance as follows.
  • the output current value Ia is a current value (first current threshold value) set lower than the current value obtained by subtracting the total internal current consumption of the power storage system 1 from the rated current.
  • the output current value Ib is a current value obtained by adding the current value during charging of the storage battery B1 to the output current value Ia.
  • the output current value Ic is a current value obtained by adding the current value during charging of the storage battery B2 to the output current value Ib.
  • the output current value Id is a current value (second current threshold) obtained by adding the current value during charging of the storage battery B3 to the output current value Ic.
  • the output current value Ie is a current value obtained by adding the current value consumed by the charging circuit 121 to the output current value Id.
  • the output current value If is a current value obtained by adding the current value consumed by the charging circuit 122 to the output current value Ie.
  • the output current value Ig is a current value (third current threshold value) obtained by adding the current value consumed by the charging circuit 123 to the output current value If.
  • the input current As the current required by the load device 3, that is, the output current increases, the input current also increases from the current value Ih.
  • the control unit 16 prohibits charging of the storage battery B1, thereby stopping the supply of current to the storage battery B1.
  • the internal current consumption of the power storage system 1 decreases by the amount corresponding to the charging current of the storage battery B1. Therefore, the input current input from the commercial power supply 2 to the power storage system 1 decreases by the amount corresponding to the decrease in the internal current consumption, and the input current value decreases from the current value Ik to the current value Ii. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value Ia after this, the storage battery B1 that is in a charging prohibited state is allowed to be charged again.
  • the control unit 16 stops the current supply to the storage batteries B1 and B2 by prohibiting the charging of the storage battery B2 in addition to the storage battery B1. To do. At this time, the internal current consumption of the power storage system 1 decreases by the amount of the charging current of the two storage batteries B1 and B2. Therefore, the input current input from the commercial power source 2 to the power storage system 1 decreases by the amount corresponding to the decrease in the internal current consumption, and the input current value decreases from the current value Ik to the current value Ii. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value Ib after this, charging is permitted again for the storage battery B2 in the charge-prohibited state.
  • the control unit 16 prohibits charging of all the three storage batteries B1 to B3, thereby supplying current to all the storage batteries B1 to B3.
  • the internal current consumption of the power storage system 1 decreases by the amount of the charging current of all the storage batteries B1 to B3. Therefore, the input current input from the commercial power source 2 to the power storage system 1 decreases by the amount corresponding to the decrease in the internal current consumption, and the input current value decreases from the current value Ik to the current value Ii. As a result, a state where the current value of the input current reaches the rated current can be avoided.
  • the storage battery B3 that is in the charge-prohibited state is allowed to be charged again.
  • the control unit 16 cuts off the power supply to the charging circuit 121.
  • the internal current consumption of the power storage system 1 is reduced by the charging current of all the storage batteries B1 to B3 and the current consumption of the charging circuit 121. Therefore, the input current input from the commercial power supply 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ik to the current value Ij. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value Id after this, power is supplied again to the charging circuit 121 whose power supply has been cut off.
  • the control unit 16 cuts off the power supply to the charging circuit 122 in addition to the charging circuit 121.
  • the internal current consumption of the power storage system 1 is reduced by the charge currents of all the storage batteries B1 to B3 and the current consumption of the two charging circuits 121 and 122. Therefore, the input current input from the commercial power supply 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ik to the current value Ij. As a result, a state where the current value of the input current reaches the rated current can be avoided.
  • the current value of the output current falls below the output current value Ie after this, power is supplied again to the charging circuit 122 that has been cut off from power supply.
  • the control unit 16 cuts off all power supply to the charging circuits 121 to 123.
  • the internal current consumption of the power storage system 1 is reduced by the charging currents of all the storage batteries B1 to B3 and the current consumptions of all the charging circuits 121 to 123. Therefore, the input current input from the commercial power supply 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ik to the current value Ij. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value If after this, power is supplied again to the charging circuit 123 that has been cut off from power supply.
  • the control unit 16 supplies DC power from the storage batteries B1 to B3 to the inverter 13 on condition that the current value of the output current reaches the output current value f and the power supply to all the charging circuits 121 to 123 is cut off. .
  • the value of the output current supplied to the load device 3 also reaches the upper limit. Since the value of the output current at this time is a current having a magnitude obtained by subtracting the minimum current necessary for maintaining the operation of the control unit 16 from the rated current, the maximum current can be supplied to the load device 3. become.
  • the power storage system 1 can increase / decrease the internal current consumption of the power storage system 1 in accordance with the increase / decrease of the output current supplied to the load device 3, and the current required by the load device 3 As the current increases, the current that can be supplied to the load device 3 can be increased stepwise. Therefore, the possibility that the current supplied to the load device 3 is insufficient due to the internal current consumption can be reduced.
  • the power storage system 1 of the present embodiment has the same components as the power storage system 1 of the first embodiment, and the control method is different.
  • the control method of the second embodiment and the change of the input current will be described.
  • FIG. 3 is a relationship diagram between the output current and the input current of the power storage system 1 according to the second embodiment of the present invention, and the change in the input current when the internal current consumption is controlled is indicated by a bold line.
  • the horizontal axis represents the output current
  • the vertical axis represents the input current.
  • the change in the input current is a straight line shown by a thin solid line.
  • the output current values I1 to Io are output current thresholds determined in advance as follows.
  • the output current value Il is a current value (lower limit current threshold value) set lower than the current value obtained by subtracting the total internal current consumption of the power storage system 1 from the rated current.
  • the output current value Im is a current value obtained by adding the current value consumed by the storage battery B1 and the charging circuit 121 to the output current value Il.
  • the output current value In is a current value obtained by adding the current value consumed by the storage battery B2 and the charging circuit 122 to the output current value Im.
  • the output current value Io is a current value (upper limit current threshold value) obtained by adding the current value consumed by the storage battery B3 and the charging circuit 123 to the output current value In.
  • the input current As the current required by the load device 3, that is, the output current increases, the input current also increases from the current value Ip.
  • the control unit 16 cuts off the power supply to the charging circuit 121.
  • the internal current consumption of the power storage system 1 is reduced by the current consumption of the charging circuit 121 and the corresponding charging current of the storage battery B1. Therefore, the input current input from the commercial power source 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ir to the current value Iq. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value Il thereafter, power is supplied again to the charging circuit 121 that has been cut off from power supply.
  • the control unit 16 When the current value of the output current further increases and reaches the output current value Im, the control unit 16 further cuts off the power supply to the charging circuit 122 in addition to the charging circuit 121. At this time, the internal current consumption of the power storage system 1 is reduced by the current consumption of the two charging circuits 121 and 122 and the charging current of the two storage batteries B1 and B2 corresponding to them. Therefore, the input current input from the commercial power source 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ir to the current value Iq. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value Im thereafter, power is supplied again to the charging circuit 122 that has been cut off from power supply.
  • the control unit 16 cuts off all power supply to the three charging circuits 121 to 123.
  • the internal current consumption of the power storage system 1 is reduced by the current consumption to all the charging circuits 121 to 123 and the charging current of all the storage batteries B1 to B3 corresponding to them. Therefore, the input current input from the commercial power source 2 to the power storage system 1 decreases by the amount corresponding to the decrease in internal current consumption, and the input current value decreases from the current value Ir to the current value Iq. As a result, a state where the current value of the input current reaches the rated current can be avoided. If the current value of the output current falls below the output current value In thereafter, power is supplied again to the charging circuit 123 that has been cut off from power supply.
  • the control unit 16 supplies DC power from the storage batteries B1 to B3 to the inverter 13 on condition that the current value of the output current reaches the output current value In and the power supply to all the charging circuits 121 to 123 is cut off. .
  • the value of the output current supplied to the load device 3 also reaches the upper limit. Since the value of the output current at this time is a current having a magnitude obtained by subtracting the minimum current necessary for maintaining the operation of the control unit 16 from the rated current, the maximum current can be supplied to the load device 3. become.
  • the power storage system 1 can increase / decrease the internal current consumption of the power storage system 1 in accordance with the increase / decrease of the output current supplied to the load device 3, and the load increases as the current required by the load device 3 increases.
  • the current that can be supplied to the device 3 can be increased stepwise. Therefore, the possibility that the current supplied to the load device 3 is insufficient due to the internal current consumption can be reduced.
  • the control unit 16 performs control to selectively switch the storage batteries that are allowed to be charged to the plurality of storage batteries B1 to B3.
  • a combination of two storage batteries that allow charging (storage batteries B1 and B2, B2 and B3, or B1 and B3) is set at regular intervals. Switch sequentially.
  • one storage battery (storage battery B1, B2, or B3) that permits charging is sequentially switched at regular intervals. Thereby, the plurality of storage batteries B1 to B3 can be charged uniformly.
  • the control unit 16 selectively switches the charging circuits 121, 122, and 123 for charging the AC power supplied from the commercial AC power supply sequentially.
  • the control unit 16 selectively switches the charging circuits 121, 122, and 123 for charging the AC power supplied from the commercial AC power supply sequentially.
  • a combination of two charging circuits (charging circuits 121 and 122, 122 and 123, or 121) that supplies AC power from a commercial AC power supply. 123) are sequentially switched at regular intervals.
  • one charging circuit (charging circuit 121 and 122 or 123) for supplying AC power from the commercial AC power supply is sequentially switched at regular intervals.
  • the plurality of storage batteries B1 to B3 can be charged uniformly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Stand-By Power Supply Arrangements (AREA)
  • Secondary Cells (AREA)

Abstract

Un système 1 d'accumulation d'électricité est pourvu : d'une pluralité de batteries d'accumulateurs B1-B3 ; d'une unité de charge 12 ; d'un onduleur 13 ; d'un commutateur 14 qui délivre sélectivement en sortie, à un dispositif de charge 3, du courant alternatif fourni par une alimentation électrique commerciale 2 ou du courant alternatif délivré à partir de l'onduleur 13 ; d'une unité de détection 15 de courant qui détecte le courant de sortie du commutateur 14 ; et d'une unité de commande 16. Pendant une période durant laquelle n'est détectée aucune panne d'alimentation de l'alimentation électrique commerciale 2, si le courant de sortie du commutateur 14 est supérieur ou égal à une première valeur seuil de courant mais inférieur à une seconde valeur de seuil de courant, l'unité de commande 16 ajuste le nombre de batteries d'accumulateurs B1-B3 par augmentation/réduction du nombre en fonction de l'amplitude du courant de sortie du commutateur 14, une charge desdites batteries d'accumulateurs étant autorisée, et si le courant de sortie du commutateur 14 est supérieur ou égal à la seconde valeur seuil de courant, l'unité de commande empêche une charge de toutes les batteries d'accumulateurs B1-B3.
PCT/JP2016/050083 2015-03-26 2016-01-05 Système d'accumulation d'électricité WO2016152177A1 (fr)

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JP2015064463A JP6468593B2 (ja) 2015-03-26 2015-03-26 蓄電システム
JP2015-064463 2015-03-26

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WO2016152177A1 true WO2016152177A1 (fr) 2016-09-29

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Cited By (1)

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WO2020066173A1 (fr) * 2018-09-26 2020-04-02 Fdk株式会社 Système de stockage d'énergie et procédé pour commander un système de stockage d'énergie

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Publication number Priority date Publication date Assignee Title
KR102191194B1 (ko) * 2019-12-30 2020-12-15 두현인프라 주식회사 축전기를 갖는 무정전 전원제어 회로
KR102159459B1 (ko) * 2019-12-30 2020-09-23 두현인프라 주식회사 축전기를 갖는 무정전 전원제어 시스템
JP7382006B2 (ja) 2020-01-15 2023-11-16 住友電気工業株式会社 給電システム

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JPH01180836U (fr) * 1988-05-30 1989-12-26
JPH03190536A (ja) * 1989-12-18 1991-08-20 Toshiba Corp 電池可動電子機器およびその充電制御方法
JP2000312445A (ja) * 1999-04-26 2000-11-07 Sekisui Chem Co Ltd 電力貯蔵システム
JP2013115953A (ja) * 2011-11-30 2013-06-10 Mitsubishi Heavy Ind Ltd 電池システム

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JPH01180836U (fr) * 1988-05-30 1989-12-26
JPH03190536A (ja) * 1989-12-18 1991-08-20 Toshiba Corp 電池可動電子機器およびその充電制御方法
JP2000312445A (ja) * 1999-04-26 2000-11-07 Sekisui Chem Co Ltd 電力貯蔵システム
JP2013115953A (ja) * 2011-11-30 2013-06-10 Mitsubishi Heavy Ind Ltd 電池システム

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020066173A1 (fr) * 2018-09-26 2020-04-02 Fdk株式会社 Système de stockage d'énergie et procédé pour commander un système de stockage d'énergie
JP2020054105A (ja) * 2018-09-26 2020-04-02 Fdk株式会社 蓄電システム、及び蓄電システムの制御方法
JP7128703B2 (ja) 2018-09-26 2022-08-31 Fdk株式会社 蓄電システム、及び蓄電システムの制御方法

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