JP5349020B2 - Generator starter - Google Patents

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JP5349020B2
JP5349020B2 JP2008298923A JP2008298923A JP5349020B2 JP 5349020 B2 JP5349020 B2 JP 5349020B2 JP 2008298923 A JP2008298923 A JP 2008298923A JP 2008298923 A JP2008298923 A JP 2008298923A JP 5349020 B2 JP5349020 B2 JP 5349020B2
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generator
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circuit conductor
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voltage
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JP2010130704A (en
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直人 仁木
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Mitsubishi Electric Corp
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Description

この発明は、発電機の起動装置に関するものである。   The present invention relates to a generator starting device.

従来のサイリスタ起動装置において、１台のサイリスタ起動装置を２台の発電機で共用するものが知られている（例えば、特許文献１参照）。このような場合、発電機の起動時における地絡保護装置として、起動時用地絡保護継電器を設けた中性点接地装置盤を発電機ごとに設置し、起動する発電機ごとに起動時用地絡保護継器により発電機の出力巻線を含む発電機回路の地絡保護が行われていた。   In a conventional thyristor starting device, one in which one thyristor starting device is shared by two generators is known (see, for example, Patent Document 1). In such a case, as a ground fault protection device at the start-up of the generator, a neutral point grounding device panel provided with a start-up ground fault protection relay is installed for each generator, and a start-up ground fault is provided for each generator to be started. The protective junction provided ground fault protection for the generator circuit including the output winding of the generator.

特開平０９−３２２５９９号公報（段落番号００２７及び図５）JP 09-322599 A (paragraph number 0027 and FIG. 5)

従来の発電機の起動装置は以上のように構成され、複数の発電機を共通のサイリスタ起動装置で起動するようなプラントであっても、発電機ごとに起動時用地絡過電圧継電器を設けることが必要であり、構成が複雑になるという問題点があった。
この発明は、上記のような問題点を解決するためになされたものであり、構成を簡略化できる発電機の起動装置を得ることを目的とする。 The conventional generator starting device is configured as described above, and even in a plant in which a plurality of generators are started by a common thyristor starting device, it is possible to provide a ground fault overvoltage relay for each generator. There is a problem that it is necessary and the configuration becomes complicated.
The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain a generator starting device capable of simplifying the configuration.

この発明に係る発電機の起動装置においては、起動用電源装置と主回路導体と開閉装置と切替制御装置と地絡検出装置とを有し、複数の発電機を起動するための発電機の起動装置であって、
起動用電源装置は、可変周波数可変電圧の交流電力を出力するものであり、
主回路導体は、起動用電源装置に接続され、
開閉装置は、主回路導体と各発電機との間に発電機ごとに設けられたものであり、
切替制御装置は、開閉装置のうちの一つを選択して閉成して起動用電源装置から閉成された開閉装置を介して発電機に交流電力を供給して当該発電機を起動するものであり、
地絡検出装置は、主回路導体の零相電圧または零相電流に基づいて起動中の発電機の地絡を検出するものである。 In the generator starting device according to the present invention, the generator starting device has a starting power supply device, a main circuit conductor, a switching device, a switching control device, and a ground fault detecting device, and starts up a plurality of generators. A device,
The starting power supply device outputs AC power of variable frequency and variable voltage,
The main circuit conductor is connected to the starting power supply,
The switchgear is provided for each generator between the main circuit conductor and each generator.
The switching control device selects and closes one of the switchgears and supplies AC power to the generator via the switchgear closed from the start-up power supply unit to start the generator And
The ground fault detection device detects a ground fault of the generator being started based on the zero phase voltage or the zero phase current of the main circuit conductor.

この発明は、起動用電源装置と主回路導体と開閉装置と切替制御装置と地絡検出装置とを有し、複数の発電機を起動するための発電機の起動装置であって、
起動用電源装置は、可変周波数可変電圧の交流電力を出力するものであり、
主回路導体は、起動用電源装置に接続され、
開閉装置は、主回路導体と各発電機との間に発電機ごとに設けられたものであり、
切替制御装置は、開閉装置のうちの一つを選択して閉成して起動用電源装置から閉成された開閉装置を介して発電機に交流電力を供給して当該発電機を起動するものであり、
地絡検出装置は、主回路導体の零相電圧または零相電流に基づいて起動中の発電機の地絡を検出するものであるので、
複数の発電機の起動を切替制御装置により開閉装置を制御して行うが、複数の発電機について、起動中の地絡保護を共通の地絡検出装置にて行うことができるので、起動装置の構成が簡略化される。 This invention has a power supply device for starting, a main circuit conductor, a switching device, a switching control device, and a ground fault detection device, and is a generator starting device for starting a plurality of generators,
The starting power supply device outputs AC power of variable frequency and variable voltage,
The main circuit conductor is connected to the starting power supply,
The switchgear is provided for each generator between the main circuit conductor and each generator.
The switching control device selects and closes one of the switchgears and supplies AC power to the generator via the switchgear closed from the start-up power supply unit to start the generator And
Since the ground fault detection device detects the ground fault of the generator being activated based on the zero phase voltage or the zero phase current of the main circuit conductor,
The start-up of a plurality of generators is performed by controlling the switchgear with a switching control device, but since the ground fault protection during start-up can be performed for a plurality of generators with a common ground fault detection device, The configuration is simplified.

実施の形態１．
図１は、この発明を実施するための実施の形態１である発電機の起動装置の構成を示す構成図である。図１において、複数の発電機１（図１では２台を図示）が発電所に設置されており、それぞれ遮断器２１及び変圧器２２を介して図示しない電力系統に接続されている。発電機１は、図示しない出力巻線がＹ結線されており、その中性点が発電機１ごとに設けられた中性点接地装置盤（ＮＧＲ盤）４を介して接地されている。中性点接地装置盤（ＮＧＲ盤）４は、接地用抵抗としての抵抗器と開閉器とを有している。 Embodiment 1 FIG.
FIG. 1 is a configuration diagram showing a configuration of a generator starting device according to Embodiment 1 for carrying out the present invention. In FIG. 1, a plurality of generators 1 (two are shown in FIG. 1) are installed in a power plant, and are connected to a power system (not shown) via a circuit breaker 21 and a transformer 22, respectively. The generator 1 is Y-connected to an output winding (not shown), and its neutral point is grounded via a neutral point grounding device panel (NGR panel) 4 provided for each generator 1. The neutral point grounding device board (NGR board) 4 has a resistor and a switch as a grounding resistor.

発電機の起動装置は、次のように構成されている。可変周波数可変電圧の交流電力を出力する起動用電源装置としてのサイリスタ起動装置（ｓｔａｔｉｃ ｆｒｅｑｕｅｎｃｙ ｃｏｎｖｅｒｔｅｒ）（ＳＦＣ）２は、選択切替盤１０３を介して２台の発電機１に接続されている。選択切替盤１０３は、地絡検出装置としての地絡過電圧継電器（ＯＶＧＲ）５、開閉装置としての遮断器１０、３相の主回路導体１１、この主回路導体１１の間に設けられた主遮断器１２、切替制御装置としての制御手段１４、母線１６、計器用変圧器１８を有する。   The generator starting device is configured as follows. A thyristor starter (SFC) 2 as a start-up power supply that outputs AC power of variable frequency and variable voltage is connected to two generators 1 via a selection switching board 103. The selection switching board 103 includes a ground fault overvoltage relay (OVGR) 5 as a ground fault detection device, a circuit breaker 10 as a switching device, a three-phase main circuit conductor 11, and a main circuit breaker provided between the main circuit conductors 11. 12, a control means 14 as a switching control device, a bus 16, and an instrument transformer 18.

主遮断器１２は、電源側の主回路導体１１を介してサイリスタ起動装置２に接続されている。２台の遮断器１０は、母線１６及び負荷側の主回路導体１１を介して主遮断器１２に共通に接続されるとともに、それぞれ発電機１に接続されている。制御手段１４は、２台の遮断器１０を択一的に開閉制御する。計器用変圧器１８は、低周波まで測定可能な広帯域の性能を有し、３巻線にて構成され、一次巻線はＹ結線されて主回路導体１１に接続されるとともに中性点が接地されている。二次巻線はΔ結線され図示しない例えば電圧計が接続されている。三次巻線は、オープンΔ結線され、零相電圧が発生する開放端子に零相電圧により動作する地絡過電圧継電器５が接続されている。   The main circuit breaker 12 is connected to the thyristor starting device 2 through the main circuit conductor 11 on the power supply side. The two circuit breakers 10 are connected in common to the main circuit breaker 12 through the bus 16 and the main circuit conductor 11 on the load side, and are also connected to the generator 1 respectively. The control means 14 selectively controls opening and closing of the two circuit breakers 10. The instrument transformer 18 has a wide-band performance that can be measured up to a low frequency, and is composed of three windings. The primary winding is Y-connected and connected to the main circuit conductor 11, and the neutral point is grounded. Has been. The secondary winding is Δ-connected and connected to a voltmeter (not shown), for example. The tertiary winding is open Δ-connected, and a ground fault overvoltage relay 5 that operates by the zero phase voltage is connected to an open terminal that generates the zero phase voltage.

次に動作について説明する。
発電機１の起動はサイリスタ起動装置２から発電機１に可変周波数可変電圧の交流電力を供給することにより、発電機１を誘導電動機として回転させ定格速度に昇速することにより行われる。共通のサイリスタ起動装置２により、複数の発電機１を起動するために、内部に各発電機１に接続される遮断器１０を有する選択切替盤１０３を設けている。発電機１の起動時には、制御手段１４により、起動する発電機１に対応する遮断器１０を投入し、サイリスタ起動装置２の可変周波数可変電圧の交流電力を、対象とする発電機１に供給し、加速し起動する。 Next, the operation will be described.
The generator 1 is activated by supplying AC power of variable frequency and variable voltage from the thyristor activation device 2 to the generator 1 to rotate the generator 1 as an induction motor and increase the rated speed to a rated speed. In order to start a plurality of generators 1 by a common thyristor starting device 2, a selection switching board 103 having a breaker 10 connected to each generator 1 is provided inside. When the generator 1 is started, the circuit breaker 10 corresponding to the generator 1 to be started is turned on by the control means 14 and the AC power of the variable frequency variable voltage of the thyristor starter 2 is supplied to the target generator 1. Accelerate and start.

２台の遮断器１０はどちらか一方が選択されて投入され、同時に２台が投入されることがないように鎖錠されている。発電機が３台以上ある場合においても、そのうちの一台が選択されて投入されるものであり、複数台の発電機の起動を要する場合は一台ずつ順次起動することになる。零相電圧を検出する地絡過電圧継電器５は、起動中に発電機１の出力巻線を含む発電機回路が地絡し零相電圧が所定値以上になると動作し、信号を発する。この信号により、例えば主遮断器１２を開路して、サイリスタ起動装置２から発電機１への電力供給を停止する。   Either one of the two circuit breakers 10 is selected and inserted, and the two circuit breakers 10 are locked so as not to be simultaneously inserted. Even when there are three or more generators, one of them is selected and put in, and when it is necessary to start a plurality of generators, the generators are sequentially started one by one. The ground fault overvoltage relay 5 that detects the zero phase voltage operates when the generator circuit including the output winding of the generator 1 is grounded during startup and the zero phase voltage becomes equal to or higher than a predetermined value, and generates a signal. With this signal, for example, the main circuit breaker 12 is opened, and the power supply from the thyristor starter 2 to the generator 1 is stopped.

この地絡過電圧継電器５は、選択切替盤１０３にて起動する発電機１を切り替えても共通に使用できるため、発電機１が複数台であっても、起動時における発電機１の地絡保護を一台の地絡過電圧継電器５及び計器用変圧器１８にて行うことができる。従って、発電機ごとに地絡過電圧継電器を設けていた従来の発電機の起動装置に比し、その構成を簡略化でき、コスト低減を図ることができる。 Since this ground fault overvoltage relay 5 can be used in common even if the generator 1 to be started up is switched by the selection switching board 103, even if there are a plurality of generators 1, the ground fault protection of the generator 1 at the time of start up is possible. Can be performed by one ground fault overvoltage relay 5 and instrument transformer 18. Therefore, compared with the starting device of the conventional power generator has provided the earth fault over voltage relay for each generator, can simplify its configuration, the cost can be reduced.

実施の形態２．
図２は、実施の形態２である発電機の起動装置の構成を示す構成図である。図２において、選択切替盤２０３は、変流器２０５及び電流計２０６を有する。変流器２０５及び電流計２０６は、低周波まで測定可能な広帯域の性能を有する。変流器２０５は主遮断器１２の負荷側の主回路導体１１に設けられ、主回路導体１１に流れる電流を検出する。電流計２０６は、変流器２０５を介して主回路導体１１に流れる電流を測定する。従来のものにおいては、起動時の発電機状態監視用の変流器及び電流計を発電機ごとに個別に設置していた。これに対し、図２に示すように選択切替盤２０３の主回路導体１１に変流器２０５を設け、電流計２０６にて電流を測定することにより、変流器２０５及び電流計２０６の共用化が可能となり、構成の簡略化を図ることができる。 Embodiment 2. FIG.
FIG. 2 is a configuration diagram showing the configuration of the generator starting device according to the second embodiment. In FIG. 2, the selection switching board 203 includes a current transformer 205 and an ammeter 206. The current transformer 205 and the ammeter 206 have a wide-band performance that can be measured up to a low frequency. The current transformer 205 is provided in the main circuit conductor 11 on the load side of the main circuit breaker 12 and detects a current flowing through the main circuit conductor 11. The ammeter 206 measures the current flowing through the main circuit conductor 11 via the current transformer 205. In the prior art, a current transformer and an ammeter for monitoring the generator state at the time of startup are individually installed for each generator. On the other hand, as shown in FIG. 2, a current transformer 205 is provided in the main circuit conductor 11 of the selection switching board 203, and the current is measured by the ammeter 206, so that the current transformer 205 and the ammeter 206 are shared. Therefore, the configuration can be simplified.

実施の形態３．
図３は、実施の形態３である発電機の起動装置の構成を示す構成図である。図３において、選択切替盤３０３は、電流変換器３０７を有する。電流変換器３０７は、低周波まで測定可能な広帯域の性能を有し、変流器２０５の二次側の電流を入力とし、入力される電流の大きさに応じた電圧を出力する。従来のものにおいては、起動時の発電機状態監視用の変流器及び電流変換器を発電機ごとに個別に設置していた。これに対し、図３に示すように選択切替盤３０３の主回路導体１１に変流器２０５を設け、電流変換器３０７にて電圧信号に変換することにより、変流器２０５及び電流変換器３０７の共用化が可能となり、構成の簡略化を図ることができる。また、電流変換器３０７の出力を遠方へ送信することにより、複数の発電機の起動時における発電機電流を遠方より監視することが可能となる。 Embodiment 3 FIG.
FIG. 3 is a configuration diagram showing the configuration of the generator starting device according to the third embodiment. In FIG. 3, the selection switching board 303 has a current converter 307. The current converter 307 has a wide-band performance that can be measured up to a low frequency, receives the secondary current of the current transformer 205 as an input, and outputs a voltage corresponding to the magnitude of the input current. In the prior art, a current transformer and a current converter for monitoring the generator state at the time of startup are individually installed for each generator. On the other hand, as shown in FIG. 3, a current transformer 205 is provided in the main circuit conductor 11 of the selection switching board 303 and converted into a voltage signal by the current converter 307, whereby the current transformer 205 and the current converter 307 are converted. Can be shared, and the configuration can be simplified. Further, by transmitting the output of the current converter 307 to a distant place, it becomes possible to monitor the generator current at the time of starting a plurality of generators from a distant place.

実施の形態４．
図４は、実施の形態４である発電機の起動装置の構成を示す構成図である。図４において、選択切替盤４０３は、電圧計４０８を有する。電圧計４０８は、低周波まで測定可能な広帯域の性能を有し、計器用変圧器１８の二次巻線に接続され、主回路導体１１の電圧を測定する。なお、この実施の形態では、主回路導体１１の電圧を測定する代わりに母線１６の電圧を測定するようにしている。従来のものにおいては、起動時の発電機状態監視用の計器用変圧器１８及び電圧計４０８を発電機ごとに個別に設置していた。これに対し、図４に示すように主回路導体１１の電圧を検出する計器用変圧器１８及び電圧計４０８を設けることにより、計器用変圧器１８及び電圧計４０８の共用化が可能となり、構成の簡略化を図ることができる。 Embodiment 4 FIG.
FIG. 4 is a configuration diagram showing the configuration of the generator starting device according to the fourth embodiment. In FIG. 4, the selection switching board 403 has a voltmeter 408. The voltmeter 408 has a wide-band performance that can be measured up to a low frequency, is connected to the secondary winding of the instrument transformer 18, and measures the voltage of the main circuit conductor 11. In this embodiment, the voltage of the bus 16 is measured instead of measuring the voltage of the main circuit conductor 11. In the prior art, the instrument transformer 18 and the voltmeter 408 for monitoring the generator state at the time of startup are individually installed for each generator. On the other hand, by providing the instrument transformer 18 and the voltmeter 408 for detecting the voltage of the main circuit conductor 11 as shown in FIG. 4, the instrument transformer 18 and the voltmeter 408 can be used in common. Can be simplified.

実施の形態５．
図５は、実施の形態５である発電機の起動装置の構成を示す構成図である。図５において、選択切替盤５０３は、電圧変換器５０９を有する。電圧変換器５０９は、低周波まで測定可能な広帯域の性能を有し、計器用変圧器１８の二次巻線に接続され、入力される主回路導体１１の電圧の大きさに応じた電圧信号を出力する。従来のものにおいては、起動時の発電機状態監視用の計器用変圧器１８及び電圧変換器５０９を発電機ごとに個別に設置していた。これに対し、図５に示すように主回路導体１１の電圧を検出する計器用変圧器１８及び電圧変換器５０９を設けることにより、計器用変圧器１８及び電圧変換器５０９の共用化が可能となり、構成の簡略化を図ることができる。また、電圧変換器５０９の出力を遠方へ送信することにより、複数の発電機の起動時における発電機電圧を遠方より監視することが可能となる。 Embodiment 5 FIG.
FIG. 5 is a configuration diagram showing the configuration of the generator starting device according to the fifth embodiment. In FIG. 5, the selection switching board 503 has a voltage converter 509. The voltage converter 509 has a wide-band performance that can be measured up to a low frequency, is connected to the secondary winding of the instrument transformer 18, and is a voltage signal corresponding to the magnitude of the voltage of the input main circuit conductor 11. Is output. In the prior art, an instrument transformer 18 and a voltage converter 509 for monitoring the generator state at the time of startup are individually installed for each generator. In contrast, by providing the instrument transformer 18 and the voltage converter 509 detects the voltage of the main circuit conductor 11 as shown in FIG. 5, it is possible to common use of instrument transformer 18 and the voltage converter 509 Therefore, the configuration can be simplified. Further, by transmitting the output of the voltage converter 509 to a distant place, it becomes possible to monitor the generator voltage at the time of starting a plurality of generators from a distant place.

実施の形態６．
図６は、実施の形態６である発電機の起動装置の構成を示す構成図である。図６において、発電機６０１の出力巻線は接地されていない。選択切替盤６０３は、零相変流器６２４と地絡過電流継電器（ＯＣＧＲ）６２５を有する。零相変流器６２４は、主回路導体１１に流れる零相電流を検出する。地絡過電流継電器６２５は、零相変流器６２４が検出した零相電流の過電流を検出する。起動しようとする発電機６０１に、サイリスタ起動装置２から遮断器１０を介して電力を供給して起動中に、発電機６０１の図示しない出力巻線を含む発電機回路が地絡すると、零相変流器６２４が検出する零相電流が増加するので、地絡過電流継電器６２５が動作して、遮断器１０を開路し、発電機６０１を保護する。 Embodiment 6 FIG.
FIG. 6 is a configuration diagram showing the configuration of the generator starting device according to the sixth embodiment. In FIG. 6, the output winding of the generator 601 is not grounded. The selection switching board 603 includes a zero-phase current transformer 624 and a ground fault overcurrent relay ( OCGR ) 625. The zero-phase current transformer 624 detects a zero-phase current flowing through the main circuit conductor 11. The ground fault overcurrent relay 625 detects the overcurrent of the zero phase current detected by the zero phase current transformer 624. When a generator circuit including an output winding (not shown) of the generator 601 is grounded while supplying power to the generator 601 to be started up from the thyristor starter 2 via the circuit breaker 10 and starting up, the zero phase Since the zero-phase current detected by the current transformer 624 increases, the ground fault overcurrent relay 625 operates to open the circuit breaker 10 and protect the generator 601.

このように、発電機が非接地系である場合には、主回路導体１１に流れる零相電流を検出する零相変流器６２４及び零相電流が過電流になったとき動作する地絡過電流継電器６２５を設けることにより、従来は発電機ごとに設けていた零相変流器６２４及び地絡過電流継電器６２５の共用化が可能となり、構成の簡略化を図ることができる。 Thus, when the generator is an ungrounded system, the zero-phase current transformer 624 that detects the zero-phase current flowing through the main circuit conductor 11 and the ground fault overcurrent that operates when the zero-phase current becomes an overcurrent. By providing the relay 625, the zero-phase current transformer 624 and the ground fault overcurrent relay 625 that are conventionally provided for each generator can be shared, and the configuration can be simplified.

なお、以上の各実施の形態においては、計器用変圧器１８や変流器２０５を、遮断器１２の負荷側の主回路導体１１に設けるものを示したが、本発明の目的を達成できる限りにおいてサイリスタ起動装置２等他の場所に設けて主回路導体１１の零相電圧や零相電流を検出するようにしてもよい。 In each of the above embodiments, the instrument transformer 18 and the current transformer 205 are provided in the main circuit conductor 11 on the load side of the circuit breaker 12, but as long as the object of the present invention can be achieved. In FIG. 2, the thyristor starter 2 may be provided at another location to detect the zero-phase voltage or the zero-phase current of the main circuit conductor 11.

この発明の実施の形態１である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 1 of this invention. この発明の実施の形態２である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 2 of this invention. この発明の実施の形態３である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 3 of this invention. この発明の実施の形態４である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 4 of this invention. この発明の実施の形態５である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 5 of this invention. この発明の実施の形態６である発電機の起動装置の構成を示す構成図である。It is a block diagram which shows the structure of the starting device of the generator which is Embodiment 6 of this invention.

符号の説明Explanation of symbols

１ 発電機、２ サイリスタ起動装置、
１０３，２０３，３０３，４０３，５０３，６０３ 選択切替盤、
４ 中性点接地装置盤、５ 地絡過電圧継電器（ＯＶＧＲ）、１１ 主回路導体、
１４ 制御手段、１８ 計器用変圧器、２０５ 変流器、２０６ 電流計、
３０７ 電流変換器、４０８ 電圧計、５０９ 電圧変換器、６２４ 零相変流器、
６２５ 地絡過電流継電器。 1 generator, 2 thyristor starter,
103, 203, 303, 403, 503, 603 selection switching board,
4 Neutral grounding device panel, 5 Ground fault overvoltage relay (OVGR), 11 Main circuit conductor,
14 control means, 18 instrument transformer, 205 current transformer, 206 ammeter,
307 Current converter, 408 Voltmeter, 509 Voltage converter, 624 Zero phase current transformer,
625 Ground fault overcurrent relay.

Claims (6)

起動用電源装置と主回路導体と開閉装置と切替制御装置と地絡検出装置とを有し、複数の発電機を起動するための発電機の起動装置であって、
上記起動用電源装置は、可変周波数可変電圧の交流電力を出力するものであり、
上記主回路導体は、上記起動用電源装置に接続され、
上記開閉装置は、上記主回路導体と上記各発電機との間に上記発電機ごとに設けられたものであり、
上記切替制御装置は、上記開閉装置のうちの一つを選択して閉成して上記起動用電源装置から上記閉成された開閉装置を介して上記発電機に上記交流電力を供給して当該発電機を起動するものであり、
上記地絡検出装置は、上記主回路導体の零相電圧または零相電流に基づいて起動中の上記発電機の地絡を検出するものである
発電機の起動装置。 A power supply device for starting, a main circuit conductor, a switching device, a switching control device, and a ground fault detection device, a generator starting device for starting a plurality of generators,
The start-up power supply device outputs AC power of variable frequency and variable voltage,
The main circuit conductor is connected to the starting power supply device,
The switchgear is provided for each generator between the main circuit conductor and each generator.
The switching control device selects and closes one of the switchgears, supplies the AC power to the generator via the closed switchgear from the startup power supply device, and To start the generator,
The ground fault detection device detects a ground fault of the generator being started based on a zero phase voltage or a zero phase current of the main circuit conductor. 上記各発電機は、Ｙ結線された出力巻線を有し当該出力巻線の中性点が接地用抵抗を介して接地されるとともに上記出力巻線が上記開閉装置を介して上記起動用電源装置に接続されるものであることを特徴とする請求項１に記載の発電機の起動装置。 Each of the generators has a Y-connected output winding, and a neutral point of the output winding is grounded via a grounding resistor, and the output winding is connected to the starting power source via the switchgear. The generator starting device according to claim 1, wherein the generator starting device is connected to the device. 上記主回路導体の電流を測定する電流計を設けたものであることを特徴とする請求項１または請求項２に記載の発電機の起動装置。 The generator starter according to claim 1 or 2, wherein an ammeter for measuring a current of the main circuit conductor is provided. 上記主回路導体の電流を電気信号に変換する電流変換器を設けたものであることを特徴とする請求項１または請求項２に記載の発電機の起動装置。 3. The generator starter according to claim 1, further comprising a current converter for converting the current of the main circuit conductor into an electric signal. 上記主回路導体の電圧を測定する電圧計を設けたものであることを特徴とする請求項１または請求項２に記載の発電機の起動装置。 3. The generator starting device according to claim 1, further comprising a voltmeter for measuring a voltage of the main circuit conductor. 上記主回路導体の電圧を電気信号に変換する電圧変換器を設けたものであることを特徴とする請求項１または請求項２に記載の発電機の起動装置。 3. The generator starting device according to claim 1, further comprising a voltage converter that converts a voltage of the main circuit conductor into an electric signal.
JP2008298923A 2008-11-25 2008-11-25 Generator starter Expired - Fee Related JP5349020B2 (en)

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