JP2008182806A - Uninterruptible power supply system and method of switching system of uninterruptible power supply unit - Google Patents

Uninterruptible power supply system and method of switching system of uninterruptible power supply unit Download PDF

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JP2008182806A
JP2008182806A JP2007013636A JP2007013636A JP2008182806A JP 2008182806 A JP2008182806 A JP 2008182806A JP 2007013636 A JP2007013636 A JP 2007013636A JP 2007013636 A JP2007013636 A JP 2007013636A JP 2008182806 A JP2008182806 A JP 2008182806A
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power supply
uninterruptible power
maintenance
breakers
load
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JP4626619B2 (en
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Takayuki Akita
崇之 秋田
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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 switch the assigned current of an uninterruptible power supply unit while preventing an overcurrent from flowing to a maintenance breaker. <P>SOLUTION: Uninterruptible power units 1a-4a are provided with auxilliary relays 11c, 21c, 31c, 41c, and 12c, 22c, 32c and 42c, respectively. As regards the condition of the switching command of the assigned currents of the uninterruptible power supply units 1a-4a, it is conditioned that breakers 81 and 82 for bus communication should be switched on at first, and that further either of the maintenance breakers of output boards 1b-4b is switched on. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は無停電電源システムおよび無停電電源装置の系統切替方法に関し、特に、分散母線無停電電源装置における母線連絡時の分担電流切替方式に適用して好適なものである。   The present invention relates to an uninterruptible power supply system and a system switching method for an uninterruptible power supply, and is particularly suitable for application to a shared current switching method at the time of bus connection in a distributed bus uninterruptible power supply.

無停電電源装置は、通常時には、交流電圧を直流電圧に変換し、バッテリを充電するとともに、停電時には、バッテリから出力される直流電圧を交流電圧に変換し、負荷をバックアップ運転する。ここで、従来の無停電電源装置では、無停電電源装置のメンテナンスのために無停電電源装置の系統切替えを行う場合、分担電流の切替指令がメンテナンス用ブレーカにのみ連動するようになっていた。   The uninterruptible power supply device normally converts an AC voltage to a DC voltage and charges the battery, and at the time of a power failure, converts the DC voltage output from the battery to an AC voltage and performs a backup operation on the load. Here, in the conventional uninterruptible power supply, when switching the system of the uninterruptible power supply for maintenance of the uninterruptible power supply, the shared current switching command is linked only to the maintenance breaker.

図２は、従来の無停電電源装置の系統切替装置の概略構成を示すブロック図である。
図２において、無停電電源装置１ａ〜４ａには交流電圧がそれぞれ入力され、無停電電源装置１ａ〜４ａは、出力盤１ｂ〜４ｂをそれぞれ介して１系出力母線盤５１および２系出力母線盤５２に接続され、１系出力母線盤５１および２系出力母線盤５２は１系負荷および２系負荷にそれぞれ接続されている。 FIG. 2 is a block diagram illustrating a schematic configuration of a system switching device of a conventional uninterruptible power supply.
In FIG. 2, AC voltages are input to the uninterruptible power supply devices 1a to 4a, respectively. The uninterruptible power supply devices 1a to 4a are connected to the 1-system output bus board 51 and the 2-system output bus board via output boards 1b to 4b, respectively. 1 system output bus board 51 and 2 system output bus board 52 are connected to 1 system load and 2 system load, respectively.

ここで、出力盤１ｂ〜４ｂには、無停電電源装置１ａ〜４ａをそれぞれ１系出力母線盤５１に接続するメンテナンス用ブレーカ１１ｂ、２１ｂ、３１ｂ、４１ｂがそれぞれ設けられるとともに、無停電電源装置１ａ〜４ａをそれぞれ２系出力母線盤５２に接続するメンテナンス用ブレーカ１２ｂ、２２ｂ、３２ｂ、４２ｂがそれぞれ設けられている。
また、１系出力母線盤５１には、出力盤１ｂ〜４ｂをそれぞれ１系負荷に接続する母線連絡用ブレーカ６１〜６４が設けられるとともに、２系出力母線盤５２には、出力盤１ｂ〜４ｂをそれぞれ２系負荷に接続する母線連絡用ブレーカ７１〜７４が設けられている。さらに、１系出力母線盤５１および２系出力母線盤５２には、１系出力母線盤５１および２系出力母線盤５２を連絡する母線連絡用ブレーカ８１、８２がそれぞれ設けられている。 Here, the output boards 1b to 4b are provided with maintenance breakers 11b, 21b, 31b and 41b for connecting the uninterruptible power supply apparatuses 1a to 4a to the 1-system output bus board 51, respectively, and the uninterruptible power supply apparatus 1a. To 4a are respectively provided with maintenance breakers 12b, 22b, 32b, and 42b.
The 1-system output bus board 51 is provided with bus-bar breakers 61-64 for connecting the output boards 1b-4b to the 1-system load, respectively, and the 2-system output bus board 52 is provided with the output boards 1b-4b. Are connected to the 2-system load, respectively. Furthermore, the 1-system output bus board 51 and the 2-system output bus board 52 are provided with bus-bar breakers 81 and 82 for connecting the 1-system output bus board 51 and the 2-system output bus board 52, respectively.

また、無停電電源装置１ａには、メンテナンス用ブレーカ１１ｂ、１２ｂにそれぞれ連動して分担電流の切替指令を行う補助接点１１ａ、１２ａが設けられ、無停電電源装置２ａには、メンテナンス用ブレーカ２１ｂ、２２ｂにそれぞれ連動して分担電流の切替指令を行う補助接点２１ａ、２２ａが設けられ、無停電電源装置３ａには、メンテナンス用ブレーカ３１ｂ、３２ｂにそれぞれ連動して分担電流の切替指令を行う補助接点３１ａ、３２ａが設けられ、無停電電源装置４ａには、メンテナンス用ブレーカ４１ｂ、４２ｂにそれぞれ連動して分担電流の切替指令を行う補助接点４１ａ、４２ａが設けられている。   Further, the uninterruptible power supply 1a is provided with auxiliary contacts 11a and 12a for instructing a shared current switching in conjunction with the maintenance breakers 11b and 12b, respectively. The uninterruptible power supply 2a has a maintenance breaker 21b, Auxiliary contacts 21a and 22a for switching the shared current in conjunction with 22b are provided, and the uninterruptible power supply 3a has auxiliary contacts for switching the shared current in conjunction with maintenance breakers 31b and 32b, respectively. 31a and 32a are provided, and the uninterruptible power supply 4a is provided with auxiliary contacts 41a and 42a for instructing switching of the shared current in conjunction with the maintenance breakers 41b and 42b, respectively.

そして、無停電電源装置１ａ〜４ａでは、出力盤１ｂ〜４ｂのメンテナンス用ブレーカ１１ｂ、２１ｂ、３１ｂ、４１ｂ、１２ｂ、２２ｂ、３２ｂ、４２ｂのオンしている側の系統により並列給電を行うことができる。
例えば、１系負荷および２系負荷に２台並列給電を行う場合、母線連絡用ブレーカ６１〜６４、７１〜７４をオン、母線連絡用ブレーカ８１、８２をオフした上で、メンテナンス用ブレーカ１１ｂ、２１ｂ、３２ｂ、４２ｂをオンするとともに、メンテナンス用ブレーカ１２ｂ、２２ｂ、３１ｂ、４１ｂをオフすることで、無停電電源装置１ａ、２ａにて１系負荷に２台並列給電を行うとともに、無停電電源装置３ａ、４ａにて２系負荷に２台並列給電を行うことができる。 And in the uninterruptible power supply 1a-4a, parallel electric power feeding can be performed by the system on the side where the maintenance breakers 11b, 21b, 31b, 41b, 12b, 22b, 32b, 42b of the output panels 1b-4b are on. it can.
For example, when performing parallel power supply to two 1-system loads and 2-system loads, the bus breaker 61-64, 71-74 are turned on, the bus contact breakers 81, 82 are turned off, and the maintenance breaker 11b, While turning on 21b, 32b, 42b and turning off the maintenance breakers 12b, 22b, 31b, 41b, the uninterruptible power supply devices 1a, 2a perform parallel power feeding to the 1 system load, and the uninterruptible power supply Two devices can be fed in parallel to the 2-system load by the devices 3a and 4a.

そして、この状態から無停電電源装置１ａ〜４ａをメンテナンスする手順としては、メンテナンス用ブレーカ１２ｂ、２２ｂ、３１ｂ、４１ｂおよび母線連絡用ブレーカ８１、８２を順番にオンすることにより、１系出力母線盤５１および２系出力母線盤５２を連絡する必要がある。このため、先ずメンテナンス用ブレーカ１２ｂをオンすると、無停電電源装置１ａの出力盤１ｂのメンテナンス用ブレーカ１１ｂ、１２ｂが両方オンすることにより、無停電電源装置１ａ〜４ａは、今までの２台並列給電×２の状態から４台並列給電に指令が切り替わるようになる。すなわち、１系負荷および２系負荷の合計を４台で分担する電流を各無停電電源装置１ａ〜４ａは出力する。   And, as a procedure for maintaining the uninterruptible power supply 1a to 4a from this state, by turning on the maintenance breakers 12b, 22b, 31b, 41b and the bus contact breakers 81, 82 in order, the 1-system output bus board It is necessary to communicate the 51 and 2 system output bus boards 52. For this reason, when the maintenance breaker 12b is first turned on, the maintenance breakers 11b and 12b of the output panel 1b of the uninterruptible power supply 1a are both turned on, so that the two uninterruptible power supply 1a to 4a are in parallel. The command is switched from the power supply × 2 state to the four-unit parallel power supply. That is, each uninterruptible power supply 1a-4a outputs the current which shares the total of 1 system load and 2 system load with 4 units | sets.

図３は、無停電電源装置における負荷電流の分担方法を説明する図である。
図３において、２台並列給電×２の状態では、メンテナンス用ブレーカ１１ｂ、２１ｂ、３２ｂ、４２ｂがオンし、メンテナンス用ブレーカ１１ｂ、２１ｂを介して繋がった無停電電源装置１ａ、２ａにて１系負荷に２台並列給電が行われるとともに、メンテナンス用ブレーカ３１ｂ、４１ｂを介して繋がった無停電電源装置３ａ、４ａにて２系負荷に２台並列給電が行われる。 FIG. 3 is a diagram illustrating a load current sharing method in the uninterruptible power supply.
In FIG. 3, in the state of two parallel power feeding × 2, the maintenance breakers 11b, 21b, 32b, and 42b are turned on, and the 1-system is connected to the uninterruptible power supply devices 1a and 2a connected via the maintenance breakers 11b and 21b. Two units are fed in parallel to the load, and two units are fed in parallel to uninterruptible power supply devices 3a and 4a connected via maintenance breakers 31b and 41b.

そして、この状態からメンテナンス用ブレーカ１２ｂをオンすると、無停電電源装置１ａ〜４ａが全て繋がり、４台の無停電電源装置１ａ〜４ａにて負荷が分担されるようになることから、４台並列給電に指令が切り替わる。
また、例えば、特許文献１には、電源系統および電源を多重化し、複数の負荷に系統切替えで給電する無停電電源システムにおいて、シーケンス制御にて系統自動切替えを行い、このシーケンス制御を電源や負荷状況の情報を条件として実行することで、電源系統と負荷の切替えを確実化および容易化する方法が開示されている。
特開平４−１８３２３４号公報 Then, when the maintenance breaker 12b is turned on from this state, the uninterruptible power supply devices 1a to 4a are all connected, and the load is shared by the four uninterruptible power supply devices 1a to 4a. The command is switched to power supply.
Further, for example, in Patent Document 1, in an uninterruptible power supply system that multiplexes power supply systems and power supplies and supplies power to a plurality of loads by system switching, system automatic switching is performed by sequence control. A method for ensuring and facilitating switching between a power supply system and a load by executing status information as a condition is disclosed.
JP-A-4-183234

しかしながら、従来の無停電電源装置１ａ〜４ａでは、メンテナンス用ブレーカ１２ｂをオンした時に、メンテナンス用ブレーカ１１ｂ、１２ｂが両方オンされると、メンテナンス用ブレーカ２２ｂ、３１ｂ、４１ｂは未だオフであるにもかかわらず、２台並列給電×２の状態から４台並列給電に指令が切り替わる。
このため、１系負荷＞２系負荷の場合、無停電電源装置３ａ、４ａから１系負荷に給電される電流は、メンテナンス用ブレーカ２２ｂ、３１ｂ、４１ｂがオフであるため、メンテナンス用ブレーカ３１ｂ、４１ｂから１系出力母線盤５１を介して１系負荷に流れることはできず、メンテナンス用ブレーカ３２ｂ、４２ｂから２系出力母線盤５２を介してメンテナンス用ブレーカ１２ｂを逆流しながら１系負荷に流れるようになる。 However, in the conventional uninterruptible power supply devices 1a to 4a, when both the maintenance breakers 11b and 12b are turned on when the maintenance breaker 12b is turned on, the maintenance breakers 22b, 31b and 41b are still turned off. Regardless, the command is switched from the state of 2 parallel power feeding × 2 to the 4 parallel power feeding.
For this reason, when the 1-system load> the 2-system load, the current fed to the 1-system load from the uninterruptible power supply devices 3a, 4a is off because the maintenance breakers 22b, 31b, 41b are off. It is not possible to flow from system 41b through system 1 output bus bar 51 to system 1 load, but from maintenance circuit breakers 32b, 42b to system 1 load while backflowing maintenance circuit breaker 12b through system 2 output bus bar 52. It becomes like this.

この結果、メンテナンス用ブレーカ１２ｂには負荷が集中し過電流になることから、メンテナンス用ブレーカ１２ｂの破損を引き起こすことがあるという問題があった。
そこで、本発明の目的は、メンテナンス用ブレーカに過電流が流れるのを防止しつつ、無停電電源装置の分担電流を切り替えることが可能な無停電電源システムおよび無停電電源装置の系統切替方法を提供することである。 As a result, since the load is concentrated on the maintenance breaker 12b and an overcurrent is generated, the maintenance breaker 12b may be damaged.
Accordingly, an object of the present invention is to provide an uninterruptible power supply system and an uninterruptible power supply system switching method capable of switching the shared current of the uninterruptible power supply while preventing overcurrent from flowing through the maintenance breaker It is to be.

上述した課題を解決するために、請求項１記載の無停電電源システムによれば、複数の無停電電源装置と、前記無停電電源装置からの出力を複数の系統に並列に給電する出力母線盤と、前記無停電電源装置からの出力を前記系統間で切り替える出力盤と、前記系統間の短絡を条件として前記無停電電源装置の全台並列給電に指令を切り替える系統切替手段とを備えることを特徴とする。
また、請求項２記載の無停電電源装置の系統切替方法によれば、複数の無停電電源装置の出力を切り替えることで複数の系統に給電を行う無停電電源装置の系統切替方法において、前記系統間の短絡を条件として前記無停電電源装置の全台並列給電に指令を切り替えることを特徴とする。 In order to solve the above-described problem, according to the uninterruptible power supply system according to claim 1, a plurality of uninterruptible power supply devices and an output bus board that feeds outputs from the uninterruptible power supply devices to a plurality of systems in parallel. And an output panel for switching the output from the uninterruptible power supply unit between the systems, and a system switching unit for switching a command to parallel power supply to all the uninterruptible power supply units on condition of a short circuit between the systems. Features.
According to the system switching method for the uninterruptible power supply according to claim 2, in the system switching method for the uninterruptible power supply that supplies power to a plurality of systems by switching the outputs of the plurality of uninterruptible power supplies. It is characterized in that the command is switched to all-unit parallel power feeding of the uninterruptible power supply on condition of a short circuit between them.

以上説明したように、本発明によれば、無停電電源装置から給電が行われる系統間を短絡させてから、全台並列給電に指令を切り替えることが可能となる。このため、２系負荷に給電していた無停電電源装置から１系負荷に給電するための出力盤のメンテナンス用ブレーカがオフしている場合においても、２系負荷に給電していた無停電電源装置から１系負荷に給電される電流を系統間で直接受け渡すことが可能となり、１系負荷に給電していた無停電電源装置から２系負荷に給電するための出力盤のメンテナンス用ブレーカに電流が逆流するのを防止することが可能となることから、メンテナンス用ブレーカに負荷が集中し過電流になることを防止することが可能となる。   As described above, according to the present invention, it is possible to switch commands to parallel power supply to all units after short-circuiting between systems to which power is supplied from the uninterruptible power supply. For this reason, even when the maintenance breaker of the output panel for supplying power to the system 1 load from the uninterruptible power supply device supplying power to the system 2 load is turned off, the uninterruptible power source supplying power to the system 2 load The current supplied to the system 1 load from the system can be directly transferred between the systems, and the maintenance breaker for the output panel for powering the system 2 load from the uninterruptible power supply that was supplying power to the system 1 load Since it is possible to prevent the current from flowing backward, it is possible to prevent the load from being concentrated on the maintenance breaker and causing an overcurrent.

以下、本発明の実施形態に係る無停電電源装置の系統切替装置について図面を参照しながら説明する。
図１は、図１（ａ）は本発明の一実施形態に係る無停電電源装置の系統切替装置の概略構成を示すブロック図、図１（ｂ）は図１（ａ）の系統切替装置における条件設定回路の概略構成を示す図である。
図１（ａ）において、無停電電源装置１ａ〜４ａには、図２の構成に加え、補助リレー１１ｃ、２１ｃ、３１ｃ、４１ｃ、１２ｃ、２２ｃ、３２ｃ、４２ｃがそれぞれ設けられている。 Hereinafter, an uninterruptible power supply system switching device according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1A is a block diagram showing a schematic configuration of a system switching device of an uninterruptible power supply according to an embodiment of the present invention, and FIG. 1B is a diagram of the system switching device of FIG. It is a figure which shows schematic structure of a condition setting circuit.
In FIG. 1A, the uninterruptible power supply devices 1a to 4a are provided with auxiliary relays 11c, 21c, 31c, 41c, 12c, 22c, 32c, and 42c in addition to the configuration of FIG.

ここで、補助リレー１１ｃ、２１ｃ、３１ｃ、４１ｃ、１２ｃ、２２ｃ、３２ｃ、４２ｃは、１系負荷および２系負荷の短絡を条件として無停電電源装置１ａ〜４ａの全台並列給電に指令を切り替えることができる。すなわち、無停電電源装置１ａ〜４ａの分担電流の切替指令の条件は、母線連絡用ブレーカ８１、８２が先にオンされ、さらに出力盤１ｂ〜４ｂのメンテナンス用ブレーカのどちらかがオンされることを条件とすることができる。その後に、メンテナンス用ブレーカ１２ｂ、２２ｂ、３１ｂ、４１ｂを順次オンすることができる。   Here, the auxiliary relays 11c, 21c, 31c, 41c, 12c, 22c, 32c, and 42c switch the command to the all-unit parallel power feeding of the uninterruptible power supply devices 1a to 4a on condition that the 1-system load and the 2-system load are short-circuited. be able to. That is, the condition of the command to switch the shared current of uninterruptible power supply devices 1a to 4a is that bus breaker breakers 81 and 82 are turned on first, and one of maintenance breakers for output panels 1b to 4b is turned on. As a condition. Thereafter, the maintenance breakers 12b, 22b, 31b, and 41b can be sequentially turned on.

これにより、２系負荷に給電していた無停電電源装置３ａ、４ａから１系負荷にそれぞれ給電するための出力盤３ｂ、４ｂのメンテナンス用ブレーカ３１ｂ、４１ｂがオフしている場合においても、無停電電源装置３ａ、４ａから１系負荷に給電される電流を母線連絡用ブレーカ８１、８２を介して系統間で直接受け渡すことが可能となり、出力盤１ｂのメンテナンス用ブレーカ１２ｂに電流が逆流するのを防止することが可能となることから、メンテナンス用ブレーカ１２ｂに負荷が集中し過電流になることを防止することが可能となる。   As a result, even when the maintenance breakers 31b and 41b of the output panels 3b and 4b for supplying power to the system 1 load from the uninterruptible power supply devices 3a and 4a supplying power to the system 2 load are turned off It is possible to directly transfer the current supplied from the power failure power supply 3a, 4a to the system 1 load between the systems via the bus line breakers 81, 82, and the current flows backward to the maintenance breaker 12b of the output panel 1b. Therefore, it is possible to prevent the load from being concentrated on the maintenance breaker 12b and causing an overcurrent.

なお、補助リレー１１ｃ、２１ｃ、３１ｃ、４１ｃ、１２ｃ、２２ｃ、３２ｃ、４２ｃとしては、図１（ｂ）の補助リレー１０５を追加して条件を作り、補助リレー１０５の接点をＯＲにて無停電電源装置１ａ〜４ａに取り込むことができる。そして、無停電電源装置１ａ〜４ａは、この接点からの信号を受けて分担電流を切り替えることができる。
ここで、補助接点１０１、１０２は、母線連絡用ブレーカ８１、８２に連動することができる。また、補助接点１０３、１０４は、無停電電源装置１ａの場合、メンテナンス用ブレーカ１１ｂ、１２ｂに連動し、無停電電源装置２ａの場合、メンテナンス用ブレーカ２１ｂ、２２ｂに連動し、無停電電源装置３ａの場合、メンテナンス用ブレーカ３１ｂ、３２ｂに連動し、無停電電源装置４ａの場合、メンテナンス用ブレーカ４１ｂ、４２ｂに連動することができる。 In addition, as auxiliary relays 11c, 21c, 31c, 41c, 12c, 22c, 32c, and 42c, the auxiliary relay 105 of FIG. 1 (b) is added to create a condition, and the contact of the auxiliary relay 105 is uninterrupted with OR. It can take in power supply devices 1a-4a. And uninterruptible power supply 1a-4a can change a shared current in response to the signal from this contact.
Here, the auxiliary contacts 101 and 102 can be linked to the busbar breakers 81 and 82. The auxiliary contacts 103, 104 are linked to the maintenance breakers 11b, 12b in the case of the uninterruptible power supply 1a, and are linked to the maintenance breakers 21b, 22b in the case of the uninterruptible power supply 2a. In this case, it can be linked to the maintenance breakers 31b and 32b, and in the case of the uninterruptible power supply 4a, it can be linked to the maintenance breakers 41b and 42b.

図１（ａ）は本発明の一実施形態に係る無停電電源装置の系統切替装置の概略構成を示すブロック図、図１（ｂ）は図１（ａ）の系統切替装置における条件設定回路の概略構成を示す図である。FIG. 1A is a block diagram showing a schematic configuration of a system switching device of an uninterruptible power supply according to an embodiment of the present invention, and FIG. 1B is a diagram of a condition setting circuit in the system switching device of FIG. It is a figure which shows schematic structure. 従来の無停電電源装置の系統切替装置の概略構成を示すブロック図である。It is a block diagram which shows schematic structure of the system switching apparatus of the conventional uninterruptible power supply. 無停電電源装置における負荷電流の分担方法を説明する図である。It is a figure explaining the sharing method of the load current in an uninterruptible power supply.

符号の説明Explanation of symbols

１ａ〜４ａ 無停電電源装置
１ｂ〜４ｂ 出力盤
１１ａ、２１ａ、３１ａ、４１ａ、１２ａ、２２ａ、３２ａ、４２ａ、１０１〜１０４
補助接点
１１ｃ、２１ｃ、３１ｃ、４１ｃ、１２ｃ、２２ｃ、３２ｃ、４２ｃ、１０５ 補助リレー
１１ｂ、１２ｂ、２１ｂ、２２ｂ、３１ｂ、３２ｂ、４１ｂ、４２ｂ メンテナンス用ブレーカ
５１ １系出力母線盤
５２ ２系出力母線盤
６１〜６４、７１〜７４、８１、８２ 母線連絡用ブレーカ 1a-4a Uninterruptible power supply 1b-4b Output panel 11a, 21a, 31a, 41a, 12a, 22a, 32a, 42a, 101-104
Auxiliary contact 11c, 21c, 31c, 41c, 12c, 22c, 32c, 42c, 105 Auxiliary relay 11b, 12b, 21b, 22b, 31b, 32b, 41b, 42b Maintenance breaker 51 1 system output bus board 52 2 system output bus bar Panel 61-64, 71-74, 81, 82 Busbar breaker

Claims (2)

複数の無停電電源装置と、
前記無停電電源装置からの出力を複数の系統に並列に給電する出力母線盤と、
前記無停電電源装置からの出力を前記系統間で切り替える出力盤と、
前記系統間の短絡を条件として前記無停電電源装置の全台並列給電に指令を切り替える系統切替手段とを備えることを特徴とする無停電電源システム。 Multiple uninterruptible power supplies,
An output bus board for feeding the output from the uninterruptible power supply in parallel to a plurality of systems;
An output panel for switching the output from the uninterruptible power supply between the systems; and
An uninterruptible power supply system comprising system switching means for switching a command to parallel power supply to all the uninterruptible power supply units on condition that a short circuit occurs between the systems. 複数の無停電電源装置の出力を切り替えることで複数の系統に給電を行う無停電電源装置の系統切替方法において、
前記系統間の短絡を条件として前記無停電電源装置の全台並列給電に指令を切り替えることを特徴とする無停電電源装置の系統切替方法。 In the system switching method of the uninterruptible power supply that supplies power to multiple systems by switching the output of multiple uninterruptible power supplies,
A system switching method for an uninterruptible power supply, characterized in that a command is switched to all-unit parallel power feeding of the uninterruptible power supply on condition of a short circuit between the systems.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119564A1 (en) 2009-04-17 2010-10-21 東芝三菱電機産業システム株式会社 Uninterruptible power supply system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5383039A (en) * 1976-12-28 1978-07-22 Japan Storage Battery Co Ltd Noobreak power supply
JPH0496635A (en) * 1990-08-13 1992-03-30 Toshiba Corp Parallel operation apparatus of uninterruptible power supplies(ups)

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5383039A (en) * 1976-12-28 1978-07-22 Japan Storage Battery Co Ltd Noobreak power supply
JPH0496635A (en) * 1990-08-13 1992-03-30 Toshiba Corp Parallel operation apparatus of uninterruptible power supplies(ups)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010119564A1 (en) 2009-04-17 2010-10-21 東芝三菱電機産業システム株式会社 Uninterruptible power supply system
US9013063B2 (en) 2009-04-17 2015-04-21 Toshiba Mitsubishi-Electric Industrial Systems Corporation Uninterruptible power supply system

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