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JP7520774B2 - Voltage Dip Compensation System - Google Patents
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JP7520774B2 - Voltage Dip Compensation System - Google Patents

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JP7520774B2
JP7520774B2 JP2021100628A JP2021100628A JP7520774B2 JP 7520774 B2 JP7520774 B2 JP 7520774B2 JP 2021100628 A JP2021100628 A JP 2021100628A JP 2021100628 A JP2021100628 A JP 2021100628A JP 7520774 B2 JP7520774 B2 JP 7520774B2
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優真 武藤
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TMEIC Corp
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Description

本開示は、瞬低補償システムのメンテナンスに関する。 This disclosure relates to maintenance of voltage sag compensation systems.

従来から、瞬間的な停電も許されない例えばコンピュータ等の重要負荷の電源として瞬低補償装置（以下単にＭＰＣとも称する）が用いられている（特許文献１参照）。 Conventionally, momentary power sag compensation devices (hereinafter simply referred to as MPC) have been used as power sources for important loads such as computers, which cannot tolerate even momentary power outages (see Patent Document 1).

特開２０１７－１８４２９９号公報JP 2017-184299 A

一方で、従来の瞬低補償装置は、メンテナンスの際には、瞬低および停電から負荷系統を保護することはできないという課題があった。 However, conventional voltage sag compensation devices had the problem that they could not protect the load system from voltage sags and power outages during maintenance.

本開示は、上記のような課題を解決するためになされたものであり、瞬低補償装置のメンテナンスの際に、瞬低および停電から負荷系統を保護することが可能な瞬低補償システムを提供することを目的とする。 This disclosure has been made to solve the above problems, and aims to provide a voltage sag compensation system that can protect a load system from voltage sags and power outages during maintenance of a voltage sag compensation device.

ある実施形態に従えば、瞬低補償システムは、第１の交流負荷に交流電力を供給する第１の瞬低補償装置と第２の交流負荷に交流電力を供給する第２の瞬低補償装置とを備える。第１の瞬低補償装置は、商用電源と接続され、第１の交流負荷に直送するとともに、商用電源の喪失時に商用系統を高速解列する第１のハイスピードスイッチと、商用電源の喪失時に直流電圧を供給する第１の蓄電装置と、商用電源の交流電圧を直流電圧に変換し第１の蓄電装置へ充電し、第１の蓄電装置からの直流電圧を交流電圧に変換し第１の交流負荷へ供給する第１の双方向変換装置と、第１のハイスピードスイッチと並列に設けられ、第１のハイスピードスイッチの第１のメンテナンスの際に用いられる第１の保守バイパス回路と、第１のメンテナンスの際に、第２の瞬低補償装置の第２の交流負荷に供給する交流電力を分岐させて商用電源の代わりに第１の保守バイパス回路の入力ノードに供給するための第１の分岐回路とを含む。第２の瞬低補償装置は、商用電源と接続され、第２の交流負荷に直送するとともに、商用電源の喪失時に商用系統を高速解列する第２のハイスピードスイッチと、商用電源の喪失時に直流電圧を供給する第２の蓄電装置と、商用電源の交流電圧を直流電圧に変換し第２の蓄電装置へ充電し、第２の蓄電装置からの直流電圧を交流電圧に変換し第２の交流負荷へ供給する第２の双方向変換装置と、第２のハイスピードスイッチと並列に設けられ、第２のハイスピードスイッチの第２のメンテナンスの際に用いられる第２の保守バイパス回路と、第２のメンテナンスの際に、第１の瞬低補償装置の第１の交流負荷に供給する交流電力を分岐させて商用電源の代わりに第２の保守バイパス回路の入力ノードに供給するための第２の分岐回路とを含む。 According to an embodiment, the voltage sag compensation system includes a first voltage sag compensation device that supplies AC power to a first AC load and a second voltage sag compensation device that supplies AC power to a second AC load. The first voltage sag compensation device includes a first high-speed switch that is connected to a commercial power source and directly supplies power to the first AC load and quickly disconnects the commercial system when the commercial power source is lost, a first storage device that supplies DC voltage when the commercial power source is lost, a first bidirectional conversion device that converts the AC voltage of the commercial power source into DC voltage and charges the first storage device, and converts the DC voltage from the first storage device into AC voltage and supplies it to the first AC load, a first maintenance bypass circuit that is provided in parallel with the first high-speed switch and is used during first maintenance of the first high-speed switch, and a first branch circuit for branching the AC power supplied to the second AC load of the second voltage sag compensation device during the first maintenance and supplying it to an input node of the first maintenance bypass circuit instead of the commercial power source. The second sag compensation device includes a second high-speed switch connected to the commercial power source, which directly supplies power to the second AC load and quickly disconnects the commercial system when the commercial power source is lost; a second storage device that supplies DC voltage when the commercial power source is lost; a second bidirectional conversion device that converts the AC voltage of the commercial power source into DC voltage and charges the second storage device, and converts the DC voltage from the second storage device into AC voltage and supplies it to the second AC load; a second maintenance bypass circuit that is provided in parallel with the second high-speed switch and is used during second maintenance of the second high-speed switch; and a second branch circuit that branches the AC power supplied to the first AC load of the first sag compensation device during second maintenance and supplies it to the input node of the second maintenance bypass circuit instead of the commercial power source.

好ましくは、第１の瞬低補償装置は、商用電源の入力を遮断する第１の入力遮断器をさらに含む。第１の分岐回路は、第１の入力遮断器により商用電源の入力を遮断した後、分岐した交流電力を第１の保守バイパス回路の入力ノードと接続するための第１の分岐スイッチを含む。第２の瞬低補償装置は、商用電源の入力を遮断する第２の入力遮断器をさらに含む。第２の分岐回路は、第２の入力遮断器により商用電源の入力を遮断した後、分岐した交流電力を第２の保守バイパス回路の入力ノードと接続するための第２の分岐スイッチを含む。 Preferably, the first instantaneous sag compensation device further includes a first input circuit breaker that cuts off the input of the commercial power supply. The first branch circuit includes a first branch switch for connecting the branched AC power to the input node of the first maintenance bypass circuit after the input of the commercial power supply is cut off by the first input circuit breaker. The second instantaneous sag compensation device further includes a second input circuit breaker that cuts off the input of the commercial power supply. The second branch circuit includes a second branch switch for connecting the branched AC power to the input node of the second maintenance bypass circuit after the input of the commercial power supply is cut off by the second input circuit breaker.

好ましくは、第１の瞬低補償装置は、第１のハイスピードスイッチと並列に設けられ、第１のハイスピードスイッチをバイパスする第１のバイパス回路を含む。第２の瞬低補償装置は、第２のハイスピードスイッチと並列に設けられ、第２のハイスピードスイッチをバイパスする第２のバイパス回路を含む。 Preferably, the first voltage sag compensation device is provided in parallel with the first high-speed switch and includes a first bypass circuit that bypasses the first high-speed switch. The second voltage sag compensation device is provided in parallel with the second high-speed switch and includes a second bypass circuit that bypasses the second high-speed switch.

本開示の瞬低補償システムは、瞬低補償装置のメンテナンスの際に、瞬低および停電から負荷系統を保護することが可能である。 The voltage sag compensation system disclosed herein can protect the load system from voltage sags and power outages during maintenance of the voltage sag compensation device.

実施形態に基づく瞬低補償システムの回路構成を説明する図である。1 is a diagram illustrating a circuit configuration of a voltage sag compensation system based on an embodiment. 実施形態に従う商用給電モード時における瞬低補償システムについて説明する図である。FIG. 1 is a diagram illustrating a voltage sag compensation system in a commercial power supply mode according to an embodiment. 実施形態に従う補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合の瞬低補償システムについて説明する図（その１）である。FIG. 11 is a diagram (part 1) for explaining a voltage sag compensation system when performing maintenance on a compensation feed circuit 5A and an HSS 6A according to an embodiment. 実施形態に従う補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合の瞬低補償システムについて説明する図（その２）である。FIG. 2 is a diagram (part 2) illustrating the voltage sag compensation system when performing maintenance on the compensation feed circuit 5A and the HSS 6A according to the embodiment.

本実施形態について、図面を参照しながら詳細に説明する。なお、図中の同一または相当部分については、同一符号を付してその説明は繰り返さない。 This embodiment will be described in detail with reference to the drawings. Note that the same or equivalent parts in the drawings will be given the same reference numerals and their description will not be repeated.

図１は、実施形態に基づく瞬低補償システムの回路構成を説明する図である。図１に示されるように、瞬低補償システムは、瞬低補償装置１Ａ，１Ｂを含む。 Figure 1 is a diagram illustrating the circuit configuration of a voltage sag compensation system based on an embodiment. As shown in Figure 1, the voltage sag compensation system includes voltage sag compensation devices 1A and 1B.

瞬低補償装置１Ａは、負荷系統１６Ａに対応して設けられている。瞬低補償装置１Ｂは、負荷系統１６Ｂに対応して設けられている。なお、本例においては２つの瞬低補償装置について説明するが、特に２つに限られずさらに複数の負荷系統に対応して瞬低補償装置を設ける構成についても適用可能である。 The voltage sag compensation device 1A is provided corresponding to the load system 16A. The voltage sag compensation device 1B is provided corresponding to the load system 16B. Note that in this example, two voltage sag compensation devices are described, but the number is not limited to two, and the present invention can also be applied to a configuration in which voltage sag compensation devices are provided corresponding to multiple load systems.

瞬低補償装置１Ａおよび１Ｂは、基本的に同一の構成である。 Voltage sag compensation devices 1A and 1B are basically identical in configuration.

瞬低補償装置１Ａは、補償給電回路５Ａと、ハイスピードスイッチ(以下、ＨＳＳとも称する)６Ａと、入力遮断器７Ａ，８Ａと、出力遮断器９Ａ，１０Ａと、バイパス回路１２Ａと、保守バイパス回路１４Ａとを含む。補償給電回路５Ａは、双方向変換器２Ａと、蓄電装置３Ａと、変圧器４Ａとを含む。バイパス回路１２Ａは、バイパス遮断器１１Ａを含む。保守バイパス回路１４Ａは、保守バイパス遮断器１３Ａを含む。 The instantaneous sag compensation device 1A includes a compensation power supply circuit 5A, a high-speed switch (hereinafter also referred to as HSS) 6A, input circuit breakers 7A and 8A, output circuit breakers 9A and 10A, a bypass circuit 12A, and a maintenance bypass circuit 14A. The compensation power supply circuit 5A includes a bidirectional converter 2A, a power storage device 3A, and a transformer 4A. The bypass circuit 12A includes a bypass circuit breaker 11A. The maintenance bypass circuit 14A includes a maintenance bypass circuit breaker 13A.

瞬低補償装置１Ｂは、補償給電回路５Ｂと、ハイスピードスイッチ６Ｂと、入力遮断器７Ｂ，８Ｂと、出力遮断器９Ｂ，１０Ｂと、バイパス回路１２Ｂと、保守バイパス回路１４Ｂとを含む。補償給電回路５Ｂは、双方向変換器２Ｂと、蓄電装置３Ｂと、変圧器４Ｂとを含む。バイパス回路１２Ｂは、バイパス遮断器１１Ｂを含む。保守バイパス回路１４Ｂは、保守バイパス遮断器１３Ｂを含む。 The instantaneous sag compensation device 1B includes a compensation power supply circuit 5B, a high-speed switch 6B, input circuit breakers 7B and 8B, output circuit breakers 9B and 10B, a bypass circuit 12B, and a maintenance bypass circuit 14B. The compensation power supply circuit 5B includes a bidirectional converter 2B, a power storage device 3B, and a transformer 4B. The bypass circuit 12B includes a bypass circuit breaker 11B. The maintenance bypass circuit 14B includes a maintenance bypass circuit breaker 13B.

瞬低補償装置１Ａは、Ａ系統の商用電源１５Ａと接続されている。 The voltage drop compensation device 1A is connected to the commercial power source 15A of system A.

瞬低補償装置１Ｂは、Ｂ系統の商用電源１５Ｂと接続されている。 The voltage drop compensation device 1B is connected to the commercial power source 15B of the B system.

瞬低補償装置１Ａは、交流入力側に入力分岐遮断器１７Ａ，１８Ａと、交流出力側に出力分岐遮断器１９Ａと２０Ａとをさらに含む。 The voltage sag compensation device 1A further includes input branch circuit breakers 17A and 18A on the AC input side and output branch circuit breakers 19A and 20A on the AC output side.

瞬低補償装置１Ｂは、交流入力側に入力分岐遮断器１７Ｂ，１８Ｂと、交流出力側に出力分岐遮断器１９Ｂと２０Ｂとをさらに含む。 The voltage sag compensation device 1B further includes input branch circuit breakers 17B and 18B on the AC input side and output branch circuit breakers 19B and 20B on the AC output side.

入力分岐遮断器１７Ａと１８Ａ、入力分岐遮断器１７Ｂと１８Ｂはそれぞれ同時投入を不可とするようインターロックが設けられている。 Input branch circuit breakers 17A and 18A, and input branch circuit breakers 17B and 18B are each equipped with an interlock to prevent simultaneous closing.

商用給電モードについて説明する。 Explain commercial power supply mode.

図２は、実施形態に従う商用給電モード時における瞬低補償システムについて説明する図である。 Figure 2 is a diagram illustrating a voltage sag compensation system in commercial power supply mode according to an embodiment.

図２を参照して、商用給電モードにおいては、入力分岐遮断器１８Ａ，１８Ｂと、出力分岐遮断器２０Ａ，２０Ｂは開放状態（オフ）となっている。入力分岐遮断器１７Ａ，１７Ｂと、出力分岐遮断器１９Ａ，１９Ｂは、投入状態（オン）となっている。 Referring to FIG. 2, in commercial power supply mode, input branch circuit breakers 18A and 18B and output branch circuit breakers 20A and 20B are in an open state (OFF). Input branch circuit breakers 17A and 17B and output branch circuit breakers 19A and 19B are in a closed state (ON).

商用給電モード時、商用電源１５Ａは、瞬低補償装置１Ａと入力分岐遮断器１７Ａを介して接続され、入力遮断器７Ａ，８Ａと、ＨＳＳ６Ａと、出力遮断器９Ａ，１０Ａを経由して負荷系統１６Ａへ電力供給する。 In commercial power supply mode, the commercial power source 15A is connected to the instantaneous voltage sag compensation device 1A via the input branch circuit breaker 17A, and supplies power to the load system 16A via the input circuit breakers 7A and 8A, the HSS 6A, and the output circuit breakers 9A and 10A.

商用給電モード時、商用電源１５Ｂは、瞬低補償装置１Ｂと入力分岐遮断器１７Ｂを介して接続され、入力遮断器７Ｂ，８Ｂと、ＨＳＳ６Ｂと、出力遮断器９Ｂ，１０Ｂを経由して負荷系統１６Ｂへ電力供給する。 In commercial power supply mode, the commercial power source 15B is connected to the instantaneous voltage sag compensation device 1B via the input branch circuit breaker 17B, and supplies power to the load system 16B via the input circuit breakers 7B and 8B, the HSS 6B, and the output circuit breakers 9B and 10B.

補償給電回路５Ａは、変圧器４Ａによって交流電圧を変圧したものを、双方向変換器２Ａによって直流電圧に変換し、蓄電装置３Ａに充電する。 The compensation power supply circuit 5A converts the AC voltage transformed by the transformer 4A into a DC voltage using the bidirectional converter 2A, and charges the storage device 3A.

補償給電回路５Ｂは、変圧器４Ｂによって交流電圧を変圧したものを、双方向変換器２Ｂによって直流電圧に変換し、蓄電装置３Ｂに充電する。 The compensation power supply circuit 5B converts the AC voltage transformed by the transformer 4B into a DC voltage using the bidirectional converter 2B, and charges the storage device 3B.

補償給電モードについて説明する。 Explain the compensation power supply mode.

商用電源１５Ａが瞬時低下(以下、瞬低)または停電した際には自動的に補償給電回路５Ａによる補償給電モードへと切り換り、商用電源１５ＡはＨＳＳ６Ａによって高速で切り離されると同時に、蓄電装置３Ａの直流電力を双方向変換器２Ａによって交流電力へ変換し、変圧器４Ａで変圧し、負荷系統１６Ａへ電力を供給する。 When the commercial power supply 15A experiences a momentary drop (hereafter referred to as a momentary drop) or a power outage, the system automatically switches to a compensation power supply mode using the compensation power supply circuit 5A, and the commercial power supply 15A is quickly disconnected by the HSS 6A. At the same time, the DC power of the storage device 3A is converted to AC power by the bidirectional converter 2A, transformed by the transformer 4A, and supplied to the load system 16A.

商用電源１５Ｂが瞬時低下(以下、瞬低)または停電した際には自動的に補償給電回路５Ａによる補償給電モードへと切り換り、商用電源１５ＢはＨＳＳ６Ｂによって高速で切り離されると同時に、蓄電装置３Ｂの直流電力を双方向変換器２Ｂによって交流電力へ変換し、変圧器４Ｂで変圧し、負荷系統１６Ｂへ電力を供給する。 When the commercial power supply 15B experiences a momentary drop (hereafter referred to as a momentary drop) or power outage, the system automatically switches to a compensation power supply mode using the compensation power supply circuit 5A, and the commercial power supply 15B is quickly disconnected by the HSS 6B. At the same time, the DC power of the storage device 3B is converted to AC power by the bidirectional converter 2B, transformed by the transformer 4B, and supplied to the load system 16B.

これにより商用電源が瞬低または停電した際に瞬断することなく必要な電力を負荷系統に供給し続けることが可能となる。 This makes it possible to continue supplying the necessary power to the load system without interruption in the event of a momentary drop or blackout in the commercial power supply.

次に、補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合について説明する。 Next, we will explain how to perform maintenance on the compensation power supply circuit 5A and HSS 6A.

図３は、実施形態に従う補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合の瞬低補償システムについて説明する図（その１）である。 Figure 3 is a diagram (part 1) illustrating a voltage sag compensation system when performing maintenance on the compensation power supply circuit 5A and HSS 6A according to an embodiment.

図３を参照して、補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合には、出力分岐遮断器２０Ｂを投入（オン）する。そして、入力分岐遮断器１７Ａを開放（オフ）し、入力分岐遮断器１８Ａを投入（オン）する。瞬低補償装置１Ａの入力電源を商用電源１５Ａから瞬低補償装置１Ｂ経由での給電へ切り換える。 Referring to FIG. 3, when performing maintenance on the compensation power supply circuit 5A and HSS 6A, the output branch circuit breaker 20B is closed (on). Then, the input branch circuit breaker 17A is opened (off) and the input branch circuit breaker 18A is closed (on). The input power supply of the voltage sag compensation device 1A is switched from the commercial power supply 15A to power supply via the voltage sag compensation device 1B.

この際、入力電源の切り換えの際には入力電源が一時喪失状態となるため、瞬低補償装置１Ａは自動的に補償給電モードへと切り換り、補償給電回路５Ａから負荷系統１６Ａへ補償給電する。 In this case, since the input power source is temporarily lost when switching the input power source, the instantaneous sag compensation device 1A automatically switches to the compensation power supply mode and supplies compensation power from the compensation power supply circuit 5A to the load system 16A.

当該出力分岐遮断器２０Ｂを投入（オン）し、入力分岐遮断器１８Ａを投入（オン）することにより、瞬低補償装置１Ａの保守バイパス回路１４Ａの入力ノードに対して瞬低補償装置１Ｂの出力の供給が可能となる。 By closing (turning on) the output branch circuit breaker 20B and closing (turning on) the input branch circuit breaker 18A, it becomes possible to supply the output of the voltage sag compensation device 1B to the input node of the maintenance bypass circuit 14A of the voltage sag compensation device 1A.

図４は、実施形態に従う補償給電回路５ＡおよびＨＳＳ６Ａの保守メンテナンスを実施する場合の瞬低補償システムについて説明する図（その２）である。 Figure 4 is a diagram (part 2) illustrating a voltage sag compensation system when performing maintenance on the compensation power supply circuit 5A and HSS 6A according to an embodiment.

図４を参照して、入力電源の切り換えが完了すると、瞬低補償装置１Ｂの出力からの商用電源による商用給電モードへと切り戻る。 Referring to FIG. 4, when the switching of the input power source is completed, the mode switches back to commercial power supply mode using the commercial power source from the output of the instantaneous dip compensation device 1B.

保守バイパス回路１４Ａへ給電経路を変更するために、保守バイパス遮断器１３Ａを投入（オン）し、入力遮断器７Ａ、出力遮断器１０Ａを開放（オフ）する。そして、入力遮断器８Ａおよび出力遮断器９Ａを開放（オフ）する。これにより、保守バイパス回路１４Ａより内側の経路は、電気的に分離される。 To change the power supply path to the maintenance bypass circuit 14A, the maintenance bypass circuit breaker 13A is closed (ON), and the input circuit breaker 7A and output circuit breaker 10A are opened (OFF). Then, the input circuit breaker 8A and output circuit breaker 9A are opened (OFF). This electrically isolates the path inside the maintenance bypass circuit 14A.

上記手順により、補償給電回路５Ａ、ＨＳＳ６Ａ、バイパス回路１２Ａの保守メンテナンスが可能となる。 The above procedure enables maintenance of the compensation power supply circuit 5A, HSS 6A, and bypass circuit 12A.

保守メンテナンス終了後は、上記工程の逆の手順で操作することにより元の状態へ戻すことが可能となる。 After maintenance is completed, you can return the system to its original state by reversing the steps above.

上記実施の形態では、瞬低補償装置１Ａは、保守バイパス回路１４Ａでの給電が可能となっているが、その電力は瞬低補償装置１Ｂの出力側から供給されている。 In the above embodiment, the voltage sag compensation device 1A can be powered by the maintenance bypass circuit 14A, but the power is supplied from the output side of the voltage sag compensation device 1B.

負荷系統１６Ａ、負荷系統１６Ｂの総負荷容量が、瞬低補償装置１Ｂの装置容量以下の負荷容量となる場合であれば、瞬低または停電が発生した際には瞬低補償装置１Ｂが動作する。瞬低補償装置１Ｂの補償給電回路５Ｂから出力分岐遮断器２０Ｂを介して瞬低補償装置１Ａに必要な電力が供給される。これにより、負荷系統１６Ａと負荷系統１６Ｂの両系統を保護することが可能である。 If the total load capacity of load systems 16A and 16B is equal to or less than the device capacity of voltage sag compensation device 1B, voltage sag compensation device 1B will operate when a voltage sag or power outage occurs. Necessary power is supplied to voltage sag compensation device 1A from compensation power supply circuit 5B of voltage sag compensation device 1B via output branch circuit breaker 20B. This makes it possible to protect both load systems 16A and 16B.

負荷系統１６Ａと負荷系統１６Ｂへの瞬低補償機能を維持したまま、補償給電回路５Ａ、ＨＳＳ６Ａ、バイパス回路１２Ａの保守メンテナンスを実施することが可能となるため、より信頼性の高いシステムを構築することが可能である。 It is possible to carry out maintenance on the compensation power supply circuit 5A, HSS 6A, and bypass circuit 12A while maintaining the sag compensation function for load system 16A and load system 16B, making it possible to build a more reliable system.

実施の形態では簡単のため異なる２つの負荷系統に対し、それぞれ瞬低補償装置が接続されている場合の構成を示したが、同様に異なる２つ以上の負荷系統に対して、それぞれ瞬低補償装置が接続されている場合においても、同様の運用ができるため、負荷系統数に関わらず同じ効果を得ることができる。 For simplicity, the embodiment shows a configuration in which a voltage sag compensation device is connected to each of two different load systems, but similar operations can be performed when a voltage sag compensation device is connected to each of two or more different load systems, so the same effect can be obtained regardless of the number of load systems.

なお、上記においては、瞬低補償装置１Ａの補償給電回路５Ａ、ＨＳＳ６Ａ、バイパス回路１２Ａの保守メンテナンスを実施する場合について説明したが、瞬低補償装置１Ｂの補償給電回路５Ｂ、ＨＳＳ６Ｂ、バイパス回路１２Ｂの保守メンテナンスを実施することについても同様である。 Note that, although the above describes the case where maintenance is performed on the compensation power supply circuit 5A, HSS 6A, and bypass circuit 12A of the voltage sag compensation device 1A, the same applies to the case where maintenance is performed on the compensation power supply circuit 5B, HSS 6B, and bypass circuit 12B of the voltage sag compensation device 1B.

今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は、上記した説明ではなく、特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

１Ａ，１Ｂ 低補償装置、２Ａ，２Ｂ 双方向変換器、３Ａ，３Ｂ 蓄電装置、４Ａ，４Ｂ 変圧器、５Ａ，５Ｂ 補償給電回路、６Ａ，６Ｂ ハイスピードスイッチ、７Ａ，７Ｂ，８Ａ，８Ｂ 入力遮断器、９Ａ，９Ｂ，１０Ａ，１０Ｂ 出力遮断器、１１Ａ，１１Ｂ バイパス遮断器、１２Ａ，１２Ｂ バイパス回路、１３Ａ，１３Ｂ 保守バイパス遮断器、１４Ａ，１４Ｂ 保守バイパス回路、１５Ａ，１５Ｂ 商用電源、１６Ａ，１６Ｂ 負荷系統、１７Ａ，１７Ｂ，１８Ａ，１８Ｂ 入力分岐遮断器、１９Ａ，１９Ｂ，２０Ａ，２０Ｂ 出力分岐遮断器。 1A, 1B low compensation device, 2A, 2B bidirectional converter, 3A, 3B power storage device, 4A, 4B transformer, 5A, 5B compensation power supply circuit, 6A, 6B high speed switch, 7A, 7B, 8A, 8B input circuit breaker, 9A, 9B, 10A, 10B output circuit breaker, 11A, 11B bypass circuit breaker, 12A, 12B bypass circuit, 13A, 13B maintenance bypass circuit breaker, 14A, 14B maintenance bypass circuit, 15A, 15B commercial power source, 16A, 16B load system, 17A, 17B, 18A, 18B input branch circuit breaker, 19A, 19B, 20A, 20B output branch circuit breaker.

Claims (3)

第１の交流負荷に交流電力を供給する第１の瞬低補償装置と、
第２の交流負荷に交流電力を供給する第２の瞬低補償装置とを備え、
前記第１の瞬低補償装置は、
商用電源と接続され、交流電力を前記第１の交流負荷に直送するとともに、前記商用電源の喪失時に商用系統を高速解列する第１のハイスピードスイッチと、
前記商用電源の喪失時に直流電圧を供給する第１の蓄電装置と、
前記商用電源の交流電圧を直流電圧に変換し前記第１の蓄電装置へ充電し、前記第１の蓄電装置からの直流電圧を交流電圧に変換し前記第１の交流負荷へ供給する第１の双方向変換装置と、
前記第１のハイスピードスイッチと並列に設けられ、前記第１のハイスピードスイッチの第１のメンテナンスの際に用いられる第１の保守バイパス回路と、
前記第１のメンテナンスの際に、前記第２の瞬低補償装置の第２の交流負荷に供給する交流電力を分岐させて前記商用電源の代わりに前記第１の保守バイパス回路の入力ノードに供給するための第１の分岐回路とを含み、
前記第２の瞬低補償装置は、
前記商用電源と接続され、交流電力を前記第２の交流負荷に直送するとともに、前記商用電源の喪失時に商用系統を高速解列する第２のハイスピードスイッチと、
前記商用電源の喪失時に前記直流電圧を供給する第２の蓄電装置と、
前記商用電源の交流電圧を直流電圧に変換し前記第２の蓄電装置へ充電し、前記第２の蓄電装置からの直流電圧を交流電圧に変換し前記第２の交流負荷へ供給する第２の双方向変換装置と、
前記第２のハイスピードスイッチと並列に設けられ、前記第２のハイスピードスイッチの第２のメンテナンスの際に用いられる第２の保守バイパス回路と、
前記第２のメンテナンスの際に、前記第１の瞬低補償装置の第１の交流負荷に供給する交流電力を分岐させて前記商用電源の代わりに前記第２の保守バイパス回路の入力ノードに供給するための第２の分岐回路とを含む、瞬低補償システム。 a first instantaneous sag compensation device that supplies AC power to a first AC load;
a second instantaneous sag compensation device that supplies AC power to a second AC load;
The first voltage sag compensation device comprises:
a first high-speed switch connected to a commercial power source, directly supplying AC power to the first AC load, and quickly disconnecting the commercial grid when the commercial power source is lost;
a first power storage device that supplies a DC voltage when the commercial power supply is lost;
a first bidirectional conversion device that converts an AC voltage of the commercial power supply into a DC voltage and charges the first power storage device, and converts a DC voltage from the first power storage device into an AC voltage and supplies the AC voltage to the first AC load;
a first maintenance bypass circuit provided in parallel with the first high-speed switch and used during first maintenance of the first high-speed switch;
a first branching circuit for branching AC power to be supplied to a second AC load of the second instantaneous dip compensation device during the first maintenance and supplying the branched AC power to an input node of the first maintenance bypass circuit instead of the commercial power source,
The second voltage sag compensation device comprises:
a second high-speed switch connected to the commercial power source, directly supplying AC power to the second AC load, and quickly disconnecting the commercial grid when the commercial power source is lost;
a second power storage device that supplies the DC voltage when the commercial power supply is lost;
a second bidirectional conversion device that converts an AC voltage of the commercial power supply into a DC voltage and charges the second power storage device, and converts a DC voltage from the second power storage device into an AC voltage and supplies the AC voltage to the second AC load;
a second maintenance bypass circuit provided in parallel with the second high-speed switch and used during second maintenance of the second high-speed switch;
a second branch circuit for branching the AC power to be supplied to a first AC load of the first voltage sag compensation device during the second maintenance and supplying the branched AC power to an input node of the second maintenance bypass circuit instead of the commercial power source. 前記第１の瞬低補償装置は、前記商用電源の入力を遮断する第１の入力遮断器をさらに含み、
前記第１の分岐回路は、前記第１の入力遮断器により前記商用電源の入力を遮断した後、分岐した交流電力を前記第１の保守バイパス回路の入力ノードと接続するための第１の分岐スイッチを含む、
前記第２の瞬低補償装置は、前記商用電源の入力を遮断する第２の入力遮断器をさらに含み、
前記第２の分岐回路は、前記第２の入力遮断器により前記商用電源の入力を遮断した後、分岐した交流電力を前記第２の保守バイパス回路の入力ノードと接続するための第２の分岐スイッチを含む、請求項１記載の瞬低補償システム。 The first instantaneous sag compensation device further includes a first input circuit breaker that cuts off an input of the commercial power supply,
the first branch circuit includes a first branch switch for connecting the branched AC power to an input node of the first maintenance bypass circuit after the first input breaker cuts off the input of the commercial power supply;
The second instantaneous sag compensation device further includes a second input circuit breaker that cuts off an input of the commercial power supply,
2. The instantaneous sag compensation system according to claim 1, wherein the second branch circuit includes a second branch switch for connecting branched AC power to an input node of the second maintenance bypass circuit after the input of the commercial power source is cut off by the second input breaker. 前記第１の瞬低補償装置は、前記第１のハイスピードスイッチと並列に設けられ、前記第１のハイスピードスイッチをバイパスする第１のバイパス回路を含み、
前記第２の瞬低補償装置は、前記第２のハイスピードスイッチと並列に設けられ、前記第２のハイスピードスイッチをバイパスする第２のバイパス回路を含む、請求項１記載の瞬低補償システム。 the first instantaneous sag compensation device includes a first bypass circuit that is provided in parallel with the first high-speed switch and bypasses the first high-speed switch;
2. The voltage sag compensation system according to claim 1, wherein the second voltage sag compensation device includes a second bypass circuit that is provided in parallel with the second high-speed switch and bypasses the second high-speed switch.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272016A (en) 2001-03-06 2002-09-20 Ntt Power & Building Facilities Inc Uninterruptible power supply unit
JP2004236427A (en) 2003-01-30 2004-08-19 Hitachi Ltd Uninterruptible power system
JP2006197709A (en) 2005-01-13 2006-07-27 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
JP2006288142A (en) 2005-04-04 2006-10-19 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply equipment and its testing method
JP2019187219A (en) 2018-04-17 2019-10-24 株式会社東芝 Panel exchange type power supply system, panel update method for power supply system, and short circuit board

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06113489A (en) * 1992-09-29 1994-04-22 Fuji Electric Co Ltd Bypass circuit for maintenance of uninterruptible power supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002272016A (en) 2001-03-06 2002-09-20 Ntt Power & Building Facilities Inc Uninterruptible power supply unit
JP2004236427A (en) 2003-01-30 2004-08-19 Hitachi Ltd Uninterruptible power system
JP2006197709A (en) 2005-01-13 2006-07-27 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
JP2006288142A (en) 2005-04-04 2006-10-19 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply equipment and its testing method
JP2019187219A (en) 2018-04-17 2019-10-24 株式会社東芝 Panel exchange type power supply system, panel update method for power supply system, and short circuit board

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