JP2008022643A - Uninterruptible power supply system - Google Patents

Uninterruptible power supply system Download PDF

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JP2008022643A
JP2008022643A JP2006192683A JP2006192683A JP2008022643A JP 2008022643 A JP2008022643 A JP 2008022643A JP 2006192683 A JP2006192683 A JP 2006192683A JP 2006192683 A JP2006192683 A JP 2006192683A JP 2008022643 A JP2008022643 A JP 2008022643A
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power supply
uninterruptible power
ups
parallel redundant
state
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Kazuyoshi Umezawa
一喜 梅沢
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Fuji Electric Co Ltd
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Fuji Electric Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To make almost equal the back-up times of storage batteries, provided to each uninterruptible power supply that makes up of an uninterruptible power supply system. <P>SOLUTION: In order to mutually connect each output side of parallel redundant uninterruptible power supply units to a coupling bus bar, when both of AC power sources (A-system power source, B-system power source), which supply electric power to each of the uninterruptible power supply units 10a, 20a, fall into a power failure state, the output side of either one set of the uninterruptible power supply units is first connected to the coupling bus bar. The phase of the output voltage of the other uninterruptible power supply unit is synchronized by a synchronization selector 3 with a voltage generated in the coupling bus bar by the connection, and then by connecting the output side of the uninterruptible power supply unit in the synchronized state, the back-up times of the storage batteries, provided on each of UPS11, UPS12, UPS21, UPS22, are made substantially equal. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

この発明は、複数組の並列冗長式無停電電源装置で構成され、該並列冗長式無停電電源装置それぞれに電力を供給する交流電源が健全なときには、これらの並列冗長式無停電電源装置がそれぞれの負荷に個別に給電する無停電電源システムに関する。   The present invention is composed of a plurality of sets of parallel redundant uninterruptible power supplies, and when the AC power supply for supplying power to each of the parallel redundant uninterruptible power supplies is healthy, the parallel redundant uninterruptible power supplies are respectively The present invention relates to an uninterruptible power supply system that individually supplies power to a load.

図４は、下記特許文献１に記載の構成を含む、この種の無停電電源システムの従来例を示す回路構成図であり、この図において、１０は無停電電源１１（ＵＰＳ１１），無停電電源１２（ＵＰＳ１２），図示の如くサイリスタスイッチと電磁接触器とからなるバイパススイッチ１３，回路遮断器１４〜１７などから形成される並列冗長式無停電電源装置（以下、Ａ系ＵＰＳとも称する）、１８，１９は回路遮断器、同様に、２０は無停電電源２１（ＵＰＳ２１），無停電電源２２（ＵＰＳ２２），図示の如くサイリスタスイッチと電磁接触器とからなるバイパススイッチ２３，回路遮断器２４〜２７などから形成される並列冗長式無停電電源装置（以下、Ｂ系ＵＰＳとも称する）、２８，２９は回路遮断器、１００，２００は負荷Ａ，負荷Ｂである。   FIG. 4 is a circuit configuration diagram showing a conventional example of this type of uninterruptible power supply system including the configuration described in Patent Document 1, in which 10 is an uninterruptible power supply 11 (UPS11), an uninterruptible power supply. 12 (UPS12), a parallel redundant uninterruptible power supply unit (hereinafter also referred to as A system UPS) formed by a bypass switch 13 comprising a thyristor switch and an electromagnetic contactor as shown in the figure, circuit breakers 14-17, etc. , 19 is a circuit breaker, and similarly, 20 is an uninterruptible power supply 21 (UPS21), an uninterruptible power supply 22 (UPS22), a bypass switch 23 comprising a thyristor switch and an electromagnetic contactor as shown, and circuit breakers 24-27 Parallel redundant uninterruptible power supply system (hereinafter also referred to as B-system UPS) formed by, etc., 28 and 29 are circuit breakers, 100 and 200 are load A, load B A.

図５は、図４に示し互いに同様構成であるＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２のうちのＵＰＳ１１の詳細回路構成図であり、１１ａは入力される交流電源（Ａ系電源）の交流電圧を所望の直流電圧に変換するコンバータ回路、１１ｂは蓄電池、１１ｃはコンバータ回路１１ａが出力する直流電圧を所望の周波数の交流電圧に変換するインバータ回路、１１ｄは、後述の如く、コンバータ回路１１ａおよびインバータ回路１１ｃを所望の動作状態に制御する制御回路である。この回路構成でＡ系電源が健全なときには、コンバータ回路１１ａから蓄電池１１ｂとインバータ回路１１ｃとに直流電力を供給している。   FIG. 5 is a detailed circuit diagram of the UPS 11 among the UPSs 11, UPS 12, UPS 21, and UPS 22 shown in FIG. 4, and 11 a indicates the desired AC voltage of the input AC power supply (A system power supply). A converter circuit for converting to a DC voltage, 11b is a storage battery, 11c is an inverter circuit for converting a DC voltage output from the converter circuit 11a to an AC voltage of a desired frequency, and 11d is a converter circuit 11a and an inverter circuit 11c as described later. It is a control circuit for controlling to a desired operation state. When the A-system power supply is healthy with this circuit configuration, DC power is supplied from the converter circuit 11a to the storage battery 11b and the inverter circuit 11c.

図４に示した無停電電源システムの動作を、図５に示した回路構成を参照しつつ、以下に説明する。   The operation of the uninterruptible power supply system shown in FIG. 4 will be described below with reference to the circuit configuration shown in FIG.

先ず、回路遮断器１４〜１７が閉路した状態にあり、バイパススイッチ１３がオフした状態でＡ系ＵＰＳに入力される交流電源（Ａ系電源）が健全なときには、ＵＰＳ１１とＵＰＳ１２とが、周知の技術により、並列運転状態でその出力電圧はＡ系電源の電圧の位相に同期している。   First, when the circuit breakers 14 to 17 are in a closed state and the AC power source (A system power source) input to the A system UPS is healthy with the bypass switch 13 turned off, the UPS 11 and the UPS 12 are well known. Due to the technology, the output voltage is synchronized with the phase of the voltage of the A system power supply in the parallel operation state.

また、回路遮断器２４〜２７が閉路した状態にあり、バイパススイッチ２３がオフした状態でＢ系ＵＰＳに入力される交流電源（Ｂ系電源）が健全なときには、ＵＰＳ２１とＵＰＳ２２とが、周知の技術により、並列運転状態でその出力電圧はＢ系電源の電圧の位相に同期している。   Further, when the circuit breakers 24 to 27 are closed and the AC power (B-system power) input to the B-system UPS is healthy with the bypass switch 23 turned off, the UPS 21 and the UPS 22 are well-known. Due to the technology, the output voltage is synchronized with the phase of the voltage of the B system power supply in the parallel operation state.

次に、Ａ系ＵＰＳ，Ｂ系ＵＰＳが上述の状態で、開路している回路遮断器１８，１９，２８，２９のうち、回路遮断器１８，２８をそれぞれ閉路させることにより、負荷Ａ，負荷Ｂそれぞれが給電状態になる。   Next, among the circuit breakers 18, 19, 28, and 29 that are open while the A-system UPS and the B-system UPS are in the above-described state, the circuit breakers 18 and 28 are closed, respectively. Each B is in a power supply state.

すなわち、負荷ＡはＡ系ＵＰＳから給電され、また、負荷ＢはＢ系ＵＰＳから給電される状態となる。   That is, the load A is fed from the A system UPS, and the load B is fed from the B system UPS.

このような状態で、例えば、Ａ系電源が停電すると、ＵＰＳ１１，ＵＰＳ１２それぞれに設置された蓄電池（図５参照）により、ＵＰＳ１１とＵＰＳ１２とがその動作を継続し、且つ、並列運転状態で、負荷Ａへの給電を継続する。また、Ａ系電源が健全なときに、例えば、ＵＰＳ１１，ＵＰＳ１２それぞれに不具合が発生すると、バイパススイッチ１３が高速動作でオフ状態からオン状態に切り替わり、負荷Ａへの給電を継続する。   In such a state, for example, when the A system power supply fails, the UPS 11 and the UPS 12 continue to operate by the storage batteries (see FIG. 5) installed in the UPS 11 and the UPS 12, respectively, and in the parallel operation state, the load Continue to supply power to A. Further, when the system A power supply is healthy, for example, if a failure occurs in each of the UPSs 11 and 12, the bypass switch 13 is switched from the OFF state to the ON state at a high speed operation, and power supply to the load A is continued.

なお、回路遮断器１９は、Ｂ系ＵＰＳから負荷Ｂへの給電が不能になったときに閉路させることにより、Ａ系ＵＰＳから負荷Ｂにも給電し、同様に、回路遮断器２９は、Ａ系ＵＰＳから負荷Ａへの給電が不能になったときに閉路させることにより、Ｂ系ＵＰＳから負荷Ａにも給電するために設置されている。
特開平４−１８３２３４号公報 The circuit breaker 19 supplies power to the load B from the A system UPS by closing the circuit when the power supply from the B system UPS to the load B becomes impossible. It is installed to supply power to the load A from the B system UPS by closing the circuit when the power supply from the system UPS to the load A becomes impossible.
JP-A-4-183234

図４に示した無停電電源システムは、商用電力の需要家側で複数組の配電系統を設け、さらに、並列冗長式無停電電源装置とその負荷機器も複数組設けることにより、全体として、危険分散を意図したシステム構成にしている。   The uninterruptible power supply system shown in FIG. 4 is dangerous as a whole by providing a plurality of sets of distribution systems on the commercial power consumer side, and further providing a plurality of sets of parallel redundant uninterruptible power supplies and their load devices. The system configuration is intended to be distributed.

しかしながら、前記商用電力が停電状態に陥ったときには、Ａ系電源，Ｂ系電源共に停電となり、その結果、ＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２それぞれに設置された蓄電池（図５参照）により、Ａ系ＵＰＳおよびＢ系ＵＰＳ１２がその動作を継続し、負荷Ａおよび負荷Ｂへの給電を継続することになるが、このとき、それぞれの電力消費量の差が大きい状態では前記蓄電池の放電量に差が生じ、従って、該蓄電池のバックアップ時間（放電終止電圧に至るまでの時間）が異なってしまうという難点があった。   However, when the commercial power is in a power failure state, both the A system power supply and the B system power supply are out of power. As a result, the storage batteries (see FIG. 5) installed in the UPS 11, UPS 12, UPS 21, and UPS 22 respectively cause the A system UPS. And the B system UPS 12 continue to operate and continue to supply power to the load A and the load B. At this time, when the difference in power consumption is large, a difference occurs in the discharge amount of the storage battery. Therefore, there is a problem that the backup time (time until the discharge end voltage) of the storage battery is different.

この発明の目的は、上記問題点を解決した無停電電源システムを提供することにある。   An object of the present invention is to provide an uninterruptible power supply system that solves the above problems.

この第１の発明の無停電電源システムにおいては、複数組の並列冗長式無停電電源装置がそれぞれの負荷に給電中に、該並列冗長式無停電電源装置それぞれに電力を供給する交流電源それぞれが停電状態に陥ったときには、前記並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続しつつ、それぞれの前記負荷への給電を継続することを特徴とする。   In the uninterruptible power supply system according to the first aspect of the present invention, each of the AC power supplies that supply power to each of the parallel redundant uninterruptible power supply units while a plurality of sets of parallel redundant uninterruptible power supply units supply power to the respective loads. When a power failure occurs, the power supply to each of the loads is continued while the output sides of the parallel redundant uninterruptible power supply devices are connected to the connecting bus.

第２の発明は前記第１の発明の無停電電源システムにおいて、
前記並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続する際には、先ず、いずれか１組の並列冗長式無停電電源装置の出力側を前記連結母線に接続し、この接続により前記連結母線に発生した電圧に、残りの並列冗長式無停電電源装置の出力電圧の位相を同期させ、その後、同期状態になっている並列冗長式無停電電源装置それぞれの出力側を前記連結母線に順次接続することを特徴とする。 The second invention is the uninterruptible power supply system of the first invention,
When connecting the output sides of the parallel redundant uninterruptible power supply units to the connected buses, first, connect the output sides of any one of the parallel redundant uninterruptible power supply units to the connected buses. The phase of the output voltage of the remaining parallel redundant uninterruptible power supply is synchronized with the voltage generated on the connected bus by the above, and then the output side of each of the parallel redundant uninterruptible power supplies that are in the synchronized state is connected to the connected bus It is characterized by sequentially connecting to the bus.

この発明によれば、前記並列冗長式無停電電源装置それぞれに電力を供給する交流電源それぞれが停電状態に陥ったときには、それぞれの負荷への給電を継続しつつ、該並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続することにより、前記蓄電池それぞれのバックアップ時間をほぼ等しくすることができる。   According to the present invention, when each AC power supply that supplies power to each of the parallel redundant uninterruptible power supply devices falls into a power failure state, the parallel redundant uninterruptible power supply device continues to supply power to each load. By connecting the respective output sides to the connecting bus, the backup times of the respective storage batteries can be made substantially equal.

図１は、この発明の実施例を示す無停電電源システムの回路構成図であり、この図において、図４に示した従来例構成と同一機能を有するものには同一符号を付している。   FIG. 1 is a circuit configuration diagram of an uninterruptible power supply system showing an embodiment of the present invention. In this figure, components having the same functions as those of the conventional configuration shown in FIG.

すなわち、図１に示した無停電電源システムでは、互いに同様構成であるＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２それぞれが、図２に示すＵＰＳ１１の詳細回路構成図のようにその制御回路１１ｅには後述の連結母線の電圧の位相に同期する機能が付加され、従って、この機能を具備する並列冗長式無停電電源装置１０ａ（以下、Ａ系ＵＰＳとも称する）と並列冗長式無停電電源装置２０ａ（以下、Ｂ系ＵＰＳとも称する）とに置き換えられ、さらに、前記連結母線にＡ系ＵＰＳの出力側を接続する電磁接触器１と、該連結母線にＢ系ＵＰＳの出力側を接続する電磁接触器２と、同期セレクター３とが追加されている。   That is, in the uninterruptible power supply system shown in FIG. 1, each of UPS 11, UPS 12, UPS 21, and UPS 22 having the same configuration is connected to the control circuit 11e as will be described later, as shown in the detailed circuit diagram of UPS 11 shown in FIG. A function to synchronize with the phase of the voltage of the bus is added. Therefore, a parallel redundant uninterruptible power supply 10a (hereinafter also referred to as A system UPS) and a parallel redundant uninterruptible power supply 20a (hereinafter referred to as B) having this function are added. Further, an electromagnetic contactor 1 that connects the output side of the A system UPS to the connecting bus, and an electromagnetic contactor 2 that connects the output side of the B system UPS to the connecting bus; A synchronization selector 3 is added.

図３は、図１に示した同期セレクター３の動作を説明するフローチャートである。   FIG. 3 is a flowchart for explaining the operation of the synchronization selector 3 shown in FIG.

図３において、ステップＳ１の個別給電状態では、Ａ系ＵＰＳにおいて、回路遮断器１４〜１７が閉路し、バイパススイッチ１３がオフした状態で入力されるＡ系電源が健全なときには、ＵＰＳ１１とＵＰＳ１２とが並列運転状態でその出力電圧はＡ系電源の電圧の位相に同期し、開路している回路遮断器１８により、負荷Ａが給電状態になっている。同様に、Ｂ系ＵＰＳにおいて、回路遮断器２４〜７７が閉路し、バイパススイッチ２３がオフした状態で入力されるＢ系電源が健全なときには、ＵＰＳ２１とＵＰＳ２２とが並列運転状態でその出力電圧はＢ系電源の電圧の位相に同期し、開路している回路遮断器２８により、負荷Ｂが給電状態になっている。   In FIG. 3, in the individual power supply state of step S1, in the A system UPS, when the circuit A circuit breakers 14 to 17 are closed and the A system power supply input with the bypass switch 13 turned off is healthy, the UPS 11 and the UPS 12 In the parallel operation state, the output voltage is synchronized with the phase of the voltage of the A-system power source, and the load A is in the power supply state by the open circuit breaker 18. Similarly, in the B system UPS, when the circuit breakers 24 to 77 are closed and the B system power supply input with the bypass switch 23 turned off is healthy, the UPS 21 and the UPS 22 are in parallel operation and the output voltage is The load B is in a power supply state by the circuit breaker 28 opened in synchronization with the phase of the voltage of the B-system power supply.

このような状態で、例えば、Ａ系電源が停電すると、ＵＰＳ１１，ＵＰＳ１２それぞれに設置された蓄電池（図２参照）により、ＵＰＳ１１とＵＰＳ１２とがその動作を継続し、且つ、並列運転状態で、負荷Ａへの給電を継続する。また、Ａ系電源が健全なときに、例えば、ＵＰＳ１１，ＵＰＳ１２それぞれに不具合が発生すると、バイパススイッチ１３が高速動作でオフ状態からオン状態に切り替わり、負荷Ａへの給電を継続する。   In such a state, for example, when the A system power supply fails, the UPS 11 and the UPS 12 continue to operate with the storage batteries (see FIG. 2) installed in the UPS 11 and the UPS 12, respectively, and in the parallel operation state, the load Continue to supply power to A. Further, when the system A power supply is healthy, for example, if a failure occurs in each of the UPSs 11 and 12, the bypass switch 13 is switched from the OFF state to the ON state at a high speed operation, and power supply to the load A is continued.

ステップＳ２では、ＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２それぞれが健全な状態で、上述の個別給電の状態中でのＡ系電源，Ｂ系電源の停電を監視し、双方共に停電でなければ（分岐Ｎ）、ステップＳ１に戻り、双方共に停電状態になったときには（分岐Ｙ）、ステップＳ３に移る。   In step S2, the UPS 11, UPS 12, UPS 21, and UPS 22 are in a healthy state, and the power failure of the A system power supply and the B system power supply during the individual power supply state described above is monitored. Returning to step S1, when both are in a power failure state (branch Y), the process proceeds to step S3.

ステップＳ３では、図１では図示しないこの無停電電源システムのシーケンス回路により、Ａ系電源，Ｂ系電源共に停電状態になったことを検知すると、電磁接触器１または電磁接触器２の何れかに投入指令が発せられて、連結母線に電圧が発生したことを確認する動作を行い、この連結母線に電圧が発生すると（分岐有）、ステップＳ４に移る。   In step S3, when it is detected by the sequence circuit of the uninterruptible power supply system (not shown in FIG. 1) that both the A-system power supply and the B-system power supply are in a power failure state, either the electromagnetic contactor 1 or the electromagnetic contactor 2 is detected. An operation for confirming that a voltage has been generated on the connecting bus when a closing command is issued is performed. When a voltage is generated on this connecting bus (with branching), the process proceeds to step S4.

ステップＳ４では、電磁接触器１または電磁接触器２のうちの何れかが投入されたかを確認し、電磁接触器２が投入されているときには（分岐Ｂ系）、ステップＳ５に移り、電磁接触器１が投入されているときには（分岐Ａ系）、ステップＳ６に移る。   In step S4, it is confirmed whether one of the electromagnetic contactor 1 or the electromagnetic contactor 2 is turned on. When the electromagnetic contactor 2 is turned on (branch B system), the process proceeds to step S5, where the electromagnetic contactor is turned on. When 1 is input (branch A system), the process proceeds to step S6.

ステップＳ５では、連結母線にはＢ系ＵＰＳの電圧が発生していることから、この電圧を同期信号としてＡ系ＵＰＳを構成するＵＰＳ１１，ＵＰＳ１２それぞれに送信し、このＡ系ＵＰＳではその出力電圧が、周知の技術により、Ｂ系ＵＰＳの出力電圧の位相に同期する動作を開始し、前記シーケンス回路によりこの同期状態が確認されると、電磁接触器１に投入指令が発せられ、Ａ系ＵＰＳとＢ系ＵＰＳとが連結母線を介して並列運転状態となり、その結果、ＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２それぞれの前記蓄電池のバックアップ時間をほぼ等しくすることができる。   In step S5, since the voltage of the B-system UPS is generated on the connecting bus, this voltage is transmitted as a synchronization signal to each of the UPSs 11 and 12 constituting the A-system UPS. The operation of synchronizing with the phase of the output voltage of the B system UPS is started by a well-known technique, and when this synchronization state is confirmed by the sequence circuit, a closing command is issued to the electromagnetic contactor 1, and the A system UPS The B system UPS is in a parallel operation state via the connecting bus, and as a result, the backup times of the storage batteries of the UPS 11, UPS 12, UPS 21, UPS 22 can be made substantially equal.

同様に、ステップＳ６では、連結母線にはＡ系ＵＰＳの電圧が発生していることから、この電圧を同期信号としてＢ系ＵＰＳを構成するＵＰＳ２１，ＵＰＳ２２それぞれに送信し、このＢ系ＵＰＳではその出力電圧が、周知の技術により、Ａ系ＵＰＳの出力電圧の位相に同期する動作を開始し、前記シーケンス回路によりこの同期状態が確認されると、電磁接触器２に投入指令が発せられ、Ａ系ＵＰＳとＢ系ＵＰＳとが連結母線を介して並列運転状態となり、その結果、ＵＰＳ１１，ＵＰＳ１２，ＵＰＳ２１，ＵＰＳ２２それぞれの前記蓄電池のバックアップ時間をほぼ等しくすることができる。   Similarly, in step S6, since the voltage of the A system UPS is generated on the connecting bus, this voltage is transmitted as a synchronization signal to each of the UPS 21 and UPS 22 constituting the B system UPS. When the output voltage starts to synchronize with the phase of the output voltage of the A-system UPS by a well-known technique, and when the synchronization state is confirmed by the sequence circuit, a closing command is issued to the electromagnetic contactor 2, and the A The system UPS and the B system UPS are in a parallel operation state via the connecting bus, and as a result, the backup times of the storage batteries of the UPS 11, UPS 12, UPS 21, and UPS 22 can be made substantially equal.

なお、図１に示した無停電電源システムにおいて、例えば、Ｂ系ＵＰＳから負荷Ｂへの給電が不能になったときに、電磁接触器１および電磁接触器２を閉路させることにより、図４に示した無停電電源システムにおける動作例と同様に、Ａ系ＵＰＳから負荷Ｂにも給電することも可能になる。   In the uninterruptible power supply system shown in FIG. 1, for example, when power supply from the B-system UPS to the load B becomes impossible, the electromagnetic contactor 1 and the electromagnetic contactor 2 are closed, so that FIG. Similarly to the operation example in the uninterruptible power supply system shown, it is also possible to supply power to the load B from the A-system UPS.

さらに、図１に示した無停電電源システムにおいては、Ａ系ＵＰＳとＢ系ＵＰＳの２組の構成例について述べたが、３組以上の並列冗長式無停電電源装置からなる無停電電源システムにおいても、この発明は実施することができる。   Furthermore, in the uninterruptible power supply system shown in FIG. 1, two configuration examples of the A-system UPS and the B-system UPS have been described. However, in the uninterruptible power system composed of three or more sets of parallel redundant uninterruptible power supplies. However, the present invention can be implemented.

すなわち、並列冗長式無停電電源装置それぞれに電力を供給する交流電源それぞれが共に停電状態に陥ったときに、並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続するために、先ず、いずれか１組の並列冗長式無停電電源装置の出力側を前記連結母線に接続し、この接続により前記連結母線に発生した電圧に、残りの並列冗長式無停電電源装置の出力電圧の位相を同期させ、その後、同期状態になっている並列冗長式無停電電源装置それぞれの出力側を前記連結母線に順次接続することにより、無停電電源それぞれに備える蓄電池のバックアップ時間をほぼ等しくすることができる。   That is, when the AC power supplies that supply power to each of the parallel redundant uninterruptible power supply units are both in a power failure state, in order to connect the output sides of the parallel redundant uninterruptible power supply units to the connecting buses, The output side of any one of the parallel redundant uninterruptible power supply units is connected to the connecting bus, and the voltage generated at the connecting bus due to this connection is connected to the phase of the output voltage of the remaining parallel redundant uninterruptible power supply. And then connecting the output side of each of the parallel redundant uninterruptible power supply units that are in synchronization to the connecting buses in sequence, so that the backup time of the storage battery provided for each uninterruptible power supply can be made substantially equal. it can.

この発明の実施例を示す無停電電源システムの回路構成図Circuit configuration diagram of an uninterruptible power supply system showing an embodiment of the present invention 図１の部分詳細回路構成図Partial detailed circuit configuration diagram of FIG. 図１の動作を説明するフローチャートFlowchart for explaining the operation of FIG. 従来例を示す無停電電源システムの回路構成図Circuit diagram of uninterruptible power supply system showing conventional example 図４の部分詳細回路構成図Partial detailed circuit configuration diagram of FIG.

符号の説明Explanation of symbols

１，２‥電磁接触器、３‥同期セレクター、１０，１０ａ，２０，２０ａ‥並列冗長式無停電電源装置，１１，１２，２１，２２‥無停電電源、１３，２３‥バイパススイッチ、１４〜１９，２４〜２９‥回路遮断器、１００‥負荷Ａ、２００‥負荷Ｂ。   1, 2 ... Magnetic contactor, 3 ... Synchronous selector, 10, 10a, 20, 20a ... Parallel redundant uninterruptible power supply, 11, 12, 21, 22, ... Uninterruptible power supply, 13, 23 ... Bypass switch, 14- 19, 24-29 Circuit breaker, 100 Load A, 200 Load B

Claims (2)

複数組の並列冗長式無停電電源装置がそれぞれの負荷に給電中に、該並列冗長式無停電電源装置それぞれに電力を供給する交流電源それぞれが停電状態に陥ったときには、
前記並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続しつつ、それぞれの前記負荷への給電を継続することを特徴とする無停電電源システム。 When each of the AC power supplies supplying power to each of the parallel redundant uninterruptible power supply units is in a power failure state while a plurality of sets of parallel redundant uninterruptible power supply units are supplying power to each load,
An uninterruptible power supply system characterized in that power supply to each of the loads is continued while connecting output sides of the parallel redundant uninterruptible power supply devices to a connecting bus. 請求項１に記載の無停電電源システムにおいて、
前記並列冗長式無停電電源装置それぞれの出力側を互いに連結母線に接続する際には、
先ず、いずれか１組の並列冗長式無停電電源装置の出力側を前記連結母線に接続し、
この接続により前記連結母線に発生した電圧に、残りの並列冗長式無停電電源装置の出力電圧の位相を同期させ、
その後、同期状態になっている並列冗長式無停電電源装置それぞれの出力側を前記連結母線に順次接続することを特徴とする無停電電源システム。 In the uninterruptible power supply system according to claim 1,
When connecting the output side of each of the parallel redundant uninterruptible power supply devices to the connecting bus,
First, the output side of any one set of parallel redundant uninterruptible power supply devices is connected to the connecting bus,
The phase of the output voltage of the remaining parallel redundant uninterruptible power supply is synchronized with the voltage generated on the connecting bus by this connection,
Thereafter, the output side of each of the parallel redundant uninterruptible power supply devices in a synchronized state is sequentially connected to the connecting bus.
JP2006192683A 2006-07-13 2006-07-13 Uninterruptible power supply system Pending JP2008022643A (en)

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JP2009303419A (en) * 2008-06-16 2009-12-24 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply
CN101951012A (en) * 2010-09-28 2011-01-19 深圳市大富科技股份有限公司 Power supply device and communication equipment
JP2012005324A (en) * 2010-06-21 2012-01-05 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
WO2015088569A1 (en) * 2013-12-14 2015-06-18 Hewlett-Packard Development Company, L.P. Powering loads with a power supply and an uninterruptible power supply
WO2015157999A1 (en) * 2014-04-18 2015-10-22 Schneider Electric It Corporation System and methods for distributed uninterruptable power supplies
WO2020253433A1 (en) * 2019-06-19 2020-12-24 深圳光峰科技股份有限公司 Power source switching circuit and power source apparatus
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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009303419A (en) * 2008-06-16 2009-12-24 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply
JP2012005324A (en) * 2010-06-21 2012-01-05 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply system
CN101951012A (en) * 2010-09-28 2011-01-19 深圳市大富科技股份有限公司 Power supply device and communication equipment
WO2015088569A1 (en) * 2013-12-14 2015-06-18 Hewlett-Packard Development Company, L.P. Powering loads with a power supply and an uninterruptible power supply
US10348123B2 (en) 2013-12-14 2019-07-09 Hewlett Packard Enterprise Development Lp Powering loads with a power supply and an uninterruptible power supply
WO2015157999A1 (en) * 2014-04-18 2015-10-22 Schneider Electric It Corporation System and methods for distributed uninterruptable power supplies
WO2020253433A1 (en) * 2019-06-19 2020-12-24 深圳光峰科技股份有限公司 Power source switching circuit and power source apparatus
CN113541299A (en) * 2021-06-30 2021-10-22 深圳市英威腾电源有限公司 Load power distribution method and device and uninterruptible power supply parallel redundancy system

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