WO2020021925A1 - 電源システム - Google Patents
電源システム Download PDFInfo
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- WO2020021925A1 WO2020021925A1 PCT/JP2019/024661 JP2019024661W WO2020021925A1 WO 2020021925 A1 WO2020021925 A1 WO 2020021925A1 JP 2019024661 W JP2019024661 W JP 2019024661W WO 2020021925 A1 WO2020021925 A1 WO 2020021925A1
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- Prior art keywords
- power
- power supply
- distributed
- commercial
- converter
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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
- 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
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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
- 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
- H02J9/066—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 characterised by the use of dynamo-electric machines
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
- H02J3/0012—Contingency detection
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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
- 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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- 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
- H02J9/062—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 for AC powered loads
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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
- 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
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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
- 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
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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
- H02J7/34—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
Definitions
- the present invention relates to a power supply system.
- a storage battery system having a large capacity (500 kW capacity class or more) that has both an uninterruptible power supply function and a load leveling function is provided.
- a secondary battery system having both an uninterruptible power supply function and a load leveling function has been considered. This system is configured to supply power to an important load by disconnecting from a power failure or a sag.
- Patent Document 1 the inventor of the present application has provided a power switch having a configuration in which an on-off switch is provided on a commercial power system side of a distributed power source on a power line and an impedance element is connected in parallel to the on-off switch.
- the open / close switch is opened when the system is abnormal, and the distributed power supply is connected to the commercial power system via the impedance element.
- a generator, a power storage device, a solar power generation device, or the like is used as the distributed power supply.
- the present invention has been made to solve the above problems, and has as its main object to stably supply power to an important load even in the event of a system abnormality while satisfying FRT requirements. .
- a power supply system includes a distributed power supply connected to a power line for supplying an important load from a commercial power system, and an on / off switch provided on the power line closer to the commercial power system than the distributed power supply in the power line. And an impedance element connected in parallel to the on / off switch in the power line, a system abnormality detection unit for detecting an abnormality in the commercial power system, and opening the on / off switch when an abnormality in the commercial power system is detected.
- a switch control unit that connects the distributed power supply and the commercial power system via the impedance element, in a state where the distributed power supply and the commercial power system are connected via the impedance element, The distributed power supply continues the operation including the reverse power flow, and the distributed power supply includes a rotary power generator connected to the power line.
- an energy storage device connected to the power line, the energy storage device comprising: an energy storage unit; a bidirectional power converter for charging and discharging the energy storage unit; A converter control unit that controls the converter to perform an operation simulating the inertial force of the rotary power generation device.
- an open / close switch is provided on the side of the commercial power system relative to the distributed power supply in the power line, and an impedance element is connected in parallel to the open / close switch, so that abnormality of the commercial power system is detected.
- the open / close switch is opened, so that the distributed power supply is connected to the commercial power system via the impedance element even when the system is abnormal.
- the uninterruptible power supply function and the load leveling function can be compatible using the common distributed power supply while satisfying the FRT requirement.
- the bidirectional power converter of the energy storage device is controlled to perform an operation simulating the inertial force of the rotary power generation device. Can be compensated for, so that the generator can be prevented from falling off due to a change in the important load. As a result, it is possible to stably supply power to the important load even when the system is abnormal.
- the distributed power source includes a solar power generation device including a solar power generation panel and a power converter.
- the cause of the drop of the rotary power generation device includes not only the fluctuation of the important load but also the fluctuation of the output of the solar power generation device.
- the energy storage device performs an operation simulating the inertial force of the rotary power generation device, it is possible to stably supply power to an important load even when the output of the solar power generation device fluctuates.
- the converter control unit controls the current of the bidirectional power converter when the commercial power system is normal, and controls the voltage of the bidirectional power converter when the commercial power system is abnormal. It is desirable that On the other hand, if the converter control unit constantly controls the voltage of the bidirectional power converter, power can be stably supplied to the important load even while the operation of the rotary power generator is stopped.
- FIG. 1 is a schematic diagram illustrating a configuration of a power supply system according to an embodiment. It is a control block diagram of the converter control part of the embodiment. It is a schematic diagram which shows the state of the power supply system at the normal time of the embodiment. It is a schematic diagram which shows the state of the power supply system at the time of the sag of the embodiment.
- These are current values and voltage values before and after the instantaneous voltage drop when inertial force control is not performed in a power supply system in which no impedance element is inserted.
- These are current values and voltage values before and after the instantaneous voltage drop when inertial force control is not performed in a power supply system into which an impedance element is inserted.
- a power supply system 100 is provided between a commercial power system 10 and an important load 30, and supplies power to the important load 30 when the commercial power system 10 is abnormal. (Uninterruptible power supply function), and a function as a distributed power supply system (load leveling function) for load leveling by flowing forward power and reverse power to the commercial power system.
- Uninterruptible power supply function and a function as a distributed power supply system (load leveling function) for load leveling by flowing forward power and reverse power to the commercial power system.
- the commercial power system 10 is a power supply network of a power company (electricity company) and includes a power plant, a transmission system, and a distribution system.
- the important load 20 is a load to which power is to be stably supplied even in the event of a system failure such as a power failure or an instantaneous drop, and is one in FIG. 1, but may be plural.
- the power supply system 100 includes a distributed power supply 2, an open / close switch 3 for connecting the commercial power system 10 to the distributed power supply 2 and the important load 30, an impedance element 4 connected in parallel to the open / close switch 3,
- the system includes a system abnormality detection unit 5 that detects an abnormality (hereinafter, system abnormality) on the commercial power system 10 side of the switch 3 and a switch control unit 6 that opens the open / close switch 3 when a system abnormality is detected. .
- the distributed power supply 2 is connected to a power line L1 for supplying power from the commercial power system 10 to the important load 30.
- the distributed power source 2 includes a solar power generation device 21, an energy storage device 22 such as a secondary battery (storage battery), and a rotary power generation device 23 having a synchronous generator and the like. These distributed power sources 2 are connected to a commercial power system 10 respectively.
- the photovoltaic power generation device 21 includes a photovoltaic power generation panel 211, a power converter 212, and a converter control unit 213 that controls the current of the power converter 212.
- the rotary power generator 23 includes a synchronous generator 231 and a control unit 232 that controls the synchronous generator 231 in a droop.
- the energy storage device 22 will be described later.
- the on / off switch 3 is provided on the commercial power system 10 side of the power line L1 with respect to the connection point of the distributed power supply 2 and opens and closes the power line L1.
- a semiconductor switch or a combination of a semiconductor switch and a mechanical switch is used.
- An open / close switch capable of high-speed switching such as a hybrid switch, can be used.
- the switching time can be set to 2 ms or less, and the switching can be performed regardless of the zero point.
- the switching time can be reduced to 2 msec or less, so that the switching can be performed irrespective of the zero point and the conduction loss can be reduced to zero.
- the open / close switch 3 is controlled to be opened and closed by a switch control unit 6.
- the impedance element 4 is connected in parallel to the open / close switch 3 on the power line L1, and is a current limiting reactor in the present embodiment.
- the system abnormality detection unit 5 detects a voltage drop including an instantaneous voltage drop of the system voltage of the commercial power system. Specifically, the system abnormality detection unit 5 detects a voltage on the commercial power system 10 side of the open / close switch 3 on the power line L1 and detects a voltage drop by comparing the detected voltage with a predetermined set value. It is.
- the set value for detecting a voltage drop is a voltage value for detecting an instantaneous voltage drop, and is, for example, a remaining voltage of 20%.
- the switch control section 6 outputs a control signal to the open / close switch 3 based on the detection signal detected by the system abnormality detection section 5 to open the open / close switch 3.
- the switch control unit 6 opens the open / close switch 3
- the commercial power system 10 is connected to the distributed power supply 2 and the important load 30 via the impedance element 4.
- the distributed power supply 2 continues the operation including the reverse power flow.
- the energy storage device 22 of the present embodiment includes a storage battery 221 such as a secondary battery serving as an energy storage unit, a bidirectional power converter 222 for charging and discharging the storage battery 221, And a converter control unit 223 that controls the bidirectional power converter 222.
- the bidirectional power converter 222 is an inverter circuit configured using a semiconductor switch element.
- the converter control unit 223 controls the voltage of the bidirectional power converter 222 when the system is abnormal, and performs an operation simulating the inertial force of the synchronous generator 231. Specifically, the converter control unit 223 performs virtual synchronous generator (VSG) control for giving the energy storage device 22 the characteristics of the synchronous generator 231.
- VSG virtual synchronous generator
- the converter control unit 223 of the present embodiment is configured such that the switch control unit 6 opens the open / close switch 3 and, at the same time, keeps the load voltage and its frequency constant as the energy storage device 22 as a voltage source having inertia. It controls the bidirectional power converter 222. 1 is a current measuring device for measuring the output current of the energy storage device 22, and 225 is a voltage measuring device for measuring the output voltage of the energy storage device 22. These measured values are obtained by the converter control unit 223, and the control of the bidirectional power converter 222 is also used.
- the converter control unit 223 performs droop control on the bidirectional power converter 222 (the voltage amplitude V and the frequency f are variable) so that the energy storage device 22 becomes a voltage source having inertia. ).
- the converter control unit 223 performs the command value control (the voltage amplitude V and the frequency f are fixed) from the droop control while keeping the energy storage device 22 with the inertial force. ).
- the reason for using the command value control is that if the system accident is eliminated immediately, the distributed power source is switched to the commercial power system within a certain time (for example, 0.1 to 1.0 second) according to the FRT requirement. This is for returning to the original output. That is, after the system is restored, the on / off switch 3 is quickly turned on again. The current flow between the system and the distributed power supply is temporarily suppressed by inserting the impedance element 4. However, if the phase shifts between the system and the distributed power supply during the impedance insertion, the voltage amplitude is restored. An overcurrent is generated at the moment when the open / close switch 3 is turned on.
- the voltage amplitude V and the frequency f are variable, and the above-described phase shift is likely to occur. Therefore, in order to turn on the on / off switch 3 as soon as possible after the detection of the power recovery, the energy storage device 22 is shifted to the command value control and the voltage of the distributed power supply side is switched to the ON state when the system abnormality is detected.
- the amplitude V and the frequency f so as to maintain the values immediately before the accident, it is possible to minimize the phase shift between the system and the distributed power supply and to shorten the synchronization time. In the case of a power failure, the operation returns to the droop control with the open / close switch 3 kept open.
- converter control unit 223 calculates the voltage output command value of bidirectional power converter 222 based on the control block diagram shown in FIG. 2 and controls bidirectional power converter 222. More specifically, the converter control unit 223 includes a first control block B1 for calculating an internal phase reference value, a second control block B2 for calculating an internal voltage reference value, and a calculated internal phase reference value. A third control block B3 for calculating a voltage output command value using the internal voltage reference value and a virtual impedance set value for simulating the inertial force of the synchronous generator 231.
- the first control block B1 obtains the system voltage abnormality detection signal, switches between active power droop control and feedback control for the frequency command value, and calculates an internal phase reference value. Further, the second control block B2 obtains the system voltage abnormality detection signal, switches between the droop control of the reactive power and the feedback control for the voltage amplitude command value, and calculates the internal voltage reference value.
- the third control block B3 calculates a voltage output command value using the calculated internal phase reference value and internal voltage reference value, the voltage measurement value, the current measurement value, and the virtual impedance setting value.
- Converter control unit 223 controls bidirectional power converter 222 using the voltage output command value.
- the power supply system 100 normally closes the open / close switch 3 as shown in FIG. 3, and the distributed power supply 2 and the important load 30 are connected to the commercial power system 10 via the open / close switch 3.
- the reactor 4 is connected in parallel to the switch 3, the impedance of the switch 3 is smaller than the impedance of the reactor 4. Therefore, the commercial power system 10 and the distributed power source 2 and the important load 30 are connected to the switch 3 Exchange power on the side. Peak cut and peak shift can be realized by the reverse power flow by the distributed power supply 2.
- the distributed power supply 2 and the important load 30 are connected to the commercial power system 10 via the reactor 4.
- the current flowing from the distributed power source 2 to the short-circuit fault point is limited by the reactor 4, so that the fault current flowing to the short-circuit fault point is suppressed, and the voltage drop of the important load 30 is prevented.
- the distributed power supply 2 continues the operation including the reverse power flow, and continues the power generation output.
- the converter control unit 223 of the energy storage device 22 operates so that the energy storage device 22 maintains the load voltage and its frequency constant as a voltage source having inertia.
- the power converter 222 is controlled.
- the system abnormality detection unit 5 detects the voltage on the commercial power system 10 side irrespective of whether the open / close switch 3 is opened or closed, and the switch control unit 6 determines whether the detected voltage becomes equal to or higher than a predetermined return voltage. For example, when the remaining voltage of the commercial power system becomes 80% or more, the open / close switch 3 is closed.
- FIGS. 4 to 6 show the simulation results of the compensation operation when a sag occurs by the power supply system.
- FIG. 5 is a graph showing each current value and voltage value before and after the instantaneous voltage drop when the VSG control is not performed in the power supply system in which the impedance element is not inserted.
- FIG. 6 is a graph showing each current value and voltage value before and after the instantaneous voltage drop when the VSG control is not performed in the power supply system in which the impedance element is inserted.
- FIG. 7 is a graph showing each current value and voltage value before and after the instantaneous voltage drop when performing VSG control in a power supply system in which an impedance element is inserted.
- the open / close switch 3 is provided on the power line L1 on the commercial power system 10 side of the distributed power supply 2, and the reactor 4 is connected to the open / close switch 3 in parallel.
- the open / close switch 3 is opened when the voltage of the commercial power system 10 becomes equal to or less than the set value, so that the distributed power supply 2 and the important load 30 can be connected to the commercial power system 10.
- the power supply system 100 does not disconnect the distributed power supply 2 and the important load 30 from the commercial power system 10 in both the normal time and the instantaneous voltage drop. It is possible to prevent a voltage drop to the important load 30 at the time of low.
- the uninterruptible power supply function and the load leveling function can be compatible using the common distributed power supply 2 while satisfying the FRT requirement.
- the bidirectional power converter 222 of the energy storage device 22 is controlled to perform an operation simulating the inertial force of the synchronous generator 231. Therefore, the inertial force of the synchronous generator 231 can be compensated for, so that the synchronous generator 231 can be prevented from falling off due to the fluctuation of the important load 30. As a result, it is possible to stably supply power to the important load 30 even when the system is abnormal.
- the system abnormality detection unit of the embodiment detects a voltage drop including an instantaneous voltage drop, at least one of a frequency variation, a voltage rise, a phase variation, a voltage imbalance, a harmonic abnormality, and a flicker is provided.
- the system abnormality that is detected may be detected.
- a capacitor may be used as the impedance element 4, or a combination of any of a reactor, a resistor, and a capacitor may be used.
- the energy storage unit of the above embodiment is a storage battery such as a secondary battery, but in addition, a pumping power generation system, a compressed air storage system, a superconducting power storage system, a flywheel, an electric double layer It may be a capacitor or the like.
- the present invention it is possible to provide a power supply system that satisfies the FRT requirement and stably supplies power to a load even in the event of a system abnormality.
Abstract
Description
特に本発明では、分散型電源として用いられたエネルギー貯蔵装置において、当該エネルギー貯蔵装置の双方向電力変換器を制御して、回転発電装置の慣性力を模擬した動作を行わせるので、回転発電装置の慣性力を補うことができるので、重要負荷の変動に対して発電機が脱落してしまうことを防ぐことができる。その結果、系統異常時においても重要負荷への電力供給を安定して行うことができる。
10 ・・・商用電力系統
30 ・・・重要負荷
L1 ・・・電力線
2 ・・・分散型電源
21 ・・・太陽光発電装置
211・・・太陽光発電パネル
212・・・電力変換器
22 ・・・エネルギー貯蔵装置
221・・・蓄電池(エネルギー貯蔵部)
222・・・双方向電力変換器
223・・・変換器制御部
23 ・・・回転発電装置
231・・・同期発電機
232・・・発電機制御部
3 ・・・開閉スイッチ
4 ・・・インピーダンス素子
5 ・・・系統異常検出部
6 ・・・スイッチ制御部
本実施形態の電源システム100は、図1に示すように、商用電力系統10と重要負荷30との間に設けられ、商用電力系統10の異常時に重要負荷30に電力を供給する無停電電源システムとしての機能(無停電電源機能)と、商用電力系統に対して順潮流及び逆潮流することで負荷平準化する分散型電源システムとしての機能(負荷平準化機能)を発揮するものである。
インピーダンス素子4の挿入によって一時的に系統-分散型電源間の電流潮流を抑制しているが、インピーダンス挿入中に系統-分散型電源間で位相がずれてしまうと、電圧振幅が復帰していても開閉スイッチ3を投入した瞬間に過電流が発生する。特にドループ制御は電圧振幅V、周波数fが可変であり、上記の位相ずれが発生しやすい。
したがって、復電検出後になるべく早く系統電圧と電圧振幅及び位相を合わせて開閉スイッチ3を投入するために、系統異常検出時はエネルギー貯蔵装置22を指令値制御に移行して分散型電源側の電圧振幅V、周波数fを事故直前の値で維持するようにコントロールすることで、系統-分散型電源間の位相ずれを最小限に抑えて、同期時間を短縮させることができる。なお、停電である場合には、開閉スイッチ3を開放したまま、ドループ制御に戻す。
なお、本発明は前記実施形態に限られるものではない。
Claims (4)
- 商用電力系統から重要負荷に給電するための電力線に接続された分散型電源と、
前記電力線において前記分散型電源よりも前記商用電力系統側に設けられた開閉スイッチと、
前記電力線において前記開閉スイッチに並列接続されたインピーダンス素子と、
前記商用電力系統の異常を検出する系統異常検出部と、
前記商用電力系統の異常が検出された場合に前記開閉スイッチを開放し、前記分散型電源と前記商用電力系統とを前記インピーダンス素子を介して接続するスイッチ制御部とを備え、
前記分散型電源と前記商用電力系統とが前記インピーダンス素子を介して接続された状態で、前記分散型電源が逆潮流を含む運転を継続するものであり、
前記分散型電源は、前記電力線に接続される回転発電装置と、前記電力線に接続されるエネルギー貯蔵装置とを有しており、
前記エネルギー貯蔵装置は、エネルギー貯蔵部と、当該エネルギー貯蔵部の充放電を行う双方向電力変換器と、当該双方向電力変換器を制御して、前記回転発電装置の慣性力を模擬した動作を行わせる変換器制御部とを有している、電源システム。 - 前記分散型電源は、太陽光発電パネル及び電力変換器を備える太陽光発電装置を有する、請求項1記載の電源システム。
- 前記変換器制御部は、前記商用電力系統の正常時は、前記双方向電力変換器を電流制御するものであり、前記商用電力系統の異常時は、前記双方向電力変換器を電圧制御するものである、請求項1又は2記載の電源システム。
- 前記変換器制御部は、前記双方向電力変換器を常時電圧制御するものである、請求項1又は2記載の電源システム。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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CN201980048338.5A CN112470358A (zh) | 2018-07-27 | 2019-06-21 | 电源系统 |
JP2020532222A JP7428902B2 (ja) | 2018-07-27 | 2019-06-21 | 電源システム |
US17/263,159 US11451063B2 (en) | 2018-07-27 | 2019-06-21 | Power supply system |
AU2019311464A AU2019311464B2 (en) | 2018-07-27 | 2019-06-21 | Power supply system |
EP19841502.8A EP3832831A4 (en) | 2018-07-27 | 2019-06-21 | POWER SUPPLY SYSTEM |
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JP2018141122 | 2018-07-27 | ||
JP2018-141122 | 2018-07-27 |
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US (1) | US11451063B2 (ja) |
EP (1) | EP3832831A4 (ja) |
JP (1) | JP7428902B2 (ja) |
CN (1) | CN112470358A (ja) |
AU (1) | AU2019311464B2 (ja) |
TW (1) | TWI723454B (ja) |
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JP7134388B1 (ja) * | 2022-01-31 | 2022-09-09 | 三菱電機株式会社 | 電力変換装置及び電力変換システム |
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CN114567014B (zh) * | 2022-04-29 | 2022-07-15 | 武汉大学 | 一种具有电压支撑功能的柔性切换开关及其控制方法 |
EP4290736A1 (en) * | 2022-06-10 | 2023-12-13 | Schneider Electric Industries SAS | Devices and methods for disconnecting a grid power source from an electrical distribution system |
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- 2019-06-21 JP JP2020532222A patent/JP7428902B2/ja active Active
- 2019-06-21 CN CN201980048338.5A patent/CN112470358A/zh active Pending
- 2019-06-21 WO PCT/JP2019/024661 patent/WO2020021925A1/ja unknown
- 2019-06-21 EP EP19841502.8A patent/EP3832831A4/en active Pending
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- 2019-06-21 AU AU2019311464A patent/AU2019311464B2/en active Active
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JP3402886B2 (ja) | 1995-12-26 | 2003-05-06 | 東京電力株式会社 | 分散型電源設備 |
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JP2017070130A (ja) * | 2015-09-30 | 2017-04-06 | パナソニックIpマネジメント株式会社 | 電力制御システム及び電力制御方法 |
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JP7134388B1 (ja) * | 2022-01-31 | 2022-09-09 | 三菱電機株式会社 | 電力変換装置及び電力変換システム |
WO2023145074A1 (ja) * | 2022-01-31 | 2023-08-03 | 三菱電機株式会社 | 電力変換装置及び電力変換システム |
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JP7428902B2 (ja) | 2024-02-07 |
EP3832831A4 (en) | 2022-03-30 |
CN112470358A (zh) | 2021-03-09 |
AU2019311464B2 (en) | 2022-05-05 |
US11451063B2 (en) | 2022-09-20 |
TW202008694A (zh) | 2020-02-16 |
EP3832831A1 (en) | 2021-06-09 |
US20210167605A1 (en) | 2021-06-03 |
TWI723454B (zh) | 2021-04-01 |
JPWO2020021925A1 (ja) | 2021-08-02 |
AU2019311464A1 (en) | 2021-02-11 |
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