JP3499078B2

JP3499078B2 - Control and protection equipment for variable speed pumped storage power plants.

Info

Publication number: JP3499078B2
Application number: JP11216796A
Authority: JP
Inventors: 栄二関谷; 勝幸川原
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 1996-04-10
Filing date: 1996-04-10
Publication date: 2004-02-23
Anticipated expiration: 2016-04-10
Also published as: JPH09285192A

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、励磁用電源装置お
よび始動用電源装置を有する可変速揚水発電プラントの
制御保護装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control and protection device for a variable speed pumped storage hydropower plant having an exciting power supply device and a starting power supply device.

【０００２】[0002]

【従来の技術】従来、同期機の始動方式としては、昭和
４９年７月１０日社団法人電気共同研究会発行の電気共
同研究第３０巻第１号第１４頁から第１６頁に記載され
ているサイリスタ始動方式が、揚水発電所向け大容量同
期発電電動機の揚水始動方式として良く知られている。2. Description of the Related Art Conventionally, a method for starting a synchronous machine is described in Electric Collaborative Research Vol. 30, No. 1, page 14 to page 16, published by the Japan Electric Collaborative Research Society on July 10, 1974. The thyristor starting method is well known as a pumping starting method for large capacity synchronous generator motors for pumped storage power plants.

【０００３】図１５は、交流励磁同期発電電動機を用い
た可変速揚水発電システムの始動用電源装置の従来例を
示している。FIG. 15 shows a conventional example of a power supply device for starting a variable speed pumped storage power generation system using an AC excitation synchronous generator motor.

【０００４】図において、可変速揚水発電システムは、
交流励磁同期発電電動機１の回転子に接続された励磁用
電源装置、例えば、サイクロコンバータ３、有効電力指
令（Ｐｏ）・落差または揚程（Ｈ）・系統電圧・回転速
度・滑り周波数等の情報に基づき、可変速揚水発電シス
テムが最適な運転状態となるようにポンプ水車２の案内
羽根２ａの制御とサイクロコンバータ３のゲート制御を
行なう交流励磁システム制御装置４、電力系統５の電圧
周波数と交流励磁同期発電電動機１の回転子の回転速度
に相当する回転周波数との差を検出する装置、例えば、
滑り周波数検出器６等から構成されている。In the figure, the variable speed pumped storage power generation system is
An excitation power supply device connected to the rotor of the AC excitation synchronous generator motor 1, for example, a cycloconverter 3, active power command (Po), head or head (H), system voltage, rotation speed, slip frequency, and other information. Based on this, an AC excitation system control device 4 for controlling the guide vanes 2a of the pump turbine 2 and gate control of the cycloconverter 3 so that the variable speed pumped storage hydropower system is in an optimum operating state, the voltage frequency of the power system 5 and the AC excitation A device for detecting a difference from the rotation frequency corresponding to the rotation speed of the rotor of the synchronous generator motor 1, for example,
The slip frequency detector 6 and the like are included.

【０００５】一方、始動用電源装置、例えば、サイリス
タ始動装置は、コンバータおよびインバータで構成され
たサイリスタ変換器７、交流励磁同期発電電動機１の磁
極の位置を検出するポジションセンサー８、ボジション
センサー８からの点弧信号または交流励磁同期発電電動
機１の端子電圧によりサイリスタ変換器７のゲート制御
を行なう始動用電源制御装置９および交流励磁同期発電
電動機１の二次側に設けられた過電圧防止装置１４から
構成されている。On the other hand, a starting power source device, for example, a thyristor starting device, includes a thyristor converter 7 including a converter and an inverter, a position sensor 8 for detecting the position of a magnetic pole of the AC excitation synchronous generator motor 1, and a position sensor 8. From the starting power supply control device 9 for controlling the gate of the thyristor converter 7 by the ignition signal of or the terminal voltage of the AC excitation synchronous generator motor 1 and the overvoltage prevention device 14 provided on the secondary side of the AC excitation synchronous generator motor 1. It is configured.

【０００６】なお、同図において、１０は第１の遮断
器、１１は第２の遮断器、１２は速度検出器、１３は可
変速揚水発電システム全体を監視・制御・保護する制御
装置（以後プラント制御装置と呼ぶ）である。In the figure, 10 is a first circuit breaker, 11 is a second circuit breaker, 12 is a speed detector, and 13 is a control device for monitoring, controlling and protecting the entire variable speed pumped storage power generation system (hereinafter referred to as "control device"). It is called a plant control device).

【０００７】上記する始動用電源装置であるサイリスタ
変換器７によって、交流励磁同期発電電動機１の始動を
行なう場合には、交流励磁同期発電電動機１を停止状態
から励磁し、交流励磁同期発電電動機１の励磁用電源装
置であるサイクロコンバータ３により回転子に直流電源
を供給し、サイリスタ変換器７から低周波可変周波数の
始動電流を供給して始動する。また、交流励磁同期発電
電動機１の特徴を活かし、始動当初はサイリスタ変換器
７から低周波の始動電流を供給し、励磁用電源装置であ
るサイクロコンバータ３からの直流励磁を低周波交流励
磁に変更することにより始動する。When the AC excitation synchronous generator motor 1 is started by the thyristor converter 7 which is the starting power supply device described above, the AC excitation synchronous generator motor 1 is excited from the stopped state and the AC excitation synchronous generator motor 1 is excited. The DC power is supplied to the rotor by the cycloconverter 3 which is the excitation power supply device, and the thyristor converter 7 supplies the starting current of the low frequency variable frequency to start the rotor. Further, taking advantage of the characteristics of the AC excitation synchronous generator motor 1, a low frequency starting current is supplied from the thyristor converter 7 at the beginning of the start, and the DC excitation from the cycloconverter 3 which is the excitation power supply device is changed to the low frequency AC excitation. It starts by doing.

【０００８】[0008]

【発明が解決しようとする課題】ところで、上記図１５
に示す交流励磁同期発電電動機１の始動では、励磁用電
源装置であるサイクロコンバータ３が始動途中に故障し
た場合、以下のように始動用電源装置であるサイリスタ
変換器７へ過電流が流れ、サイリスタ変換器７が非常停
止して、その復帰に多大の時間と労力を要するという問
題がある。By the way, the above-mentioned FIG.
In the starting of the AC excitation synchronous generator motor 1 shown in (1), when the cycloconverter 3 which is the excitation power supply unit fails during the start-up, an overcurrent flows to the thyristor converter 7 which is the starting power supply unit as follows, and There is a problem in that the converter 7 is brought to an emergency stop and it takes a lot of time and labor to restore it.

【０００９】まず、第１に、サイリスタ変換器７により
交流励磁同期発電電動機１を始動している途中で交流励
磁同期発電電動機１の励磁用電源装置であるサイクロコ
ンバータ３に故障が発生した場合、図１６に示すように
交流励磁同期発電電動機１のサイクロコンバータ３が停
止され、その後に主機の非常停止用の閉塞継電器８６‐
１を動作させ、この信号によりサイリスタ変換器７のサ
イリスタのゲートを制御する信号をブロックしてサイリ
スタ変換器７を停止し、第２の遮断器１１を開き、交流
励磁同期発電電動機１を非常停止していた。この場合、
従来の直流励磁の同期発電電動機では、励磁装置の故障
で発電電動機の界磁遮断器を開放するため、発電電動機
の界磁巻線に流れていた界磁電流は、界磁遮断器の放電
回路を通して減衰はするが流れ続けることができたため
に上記サイリスタ変換器７が非常停止に至ることがなか
った。First, when a failure occurs in the cycloconverter 3 which is the excitation power supply device of the AC excitation synchronous generator motor 1 while the AC excitation synchronous generator motor 1 is being started by the thyristor converter 7, As shown in FIG. 16, the cycloconverter 3 of the AC excitation synchronous generator-motor 1 is stopped, and then the block relay 86- for emergency stop of the main engine is used.
1 is operated, the signal for controlling the gate of the thyristor of the thyristor converter 7 is blocked by this signal, the thyristor converter 7 is stopped, the second breaker 11 is opened, and the AC excitation synchronous generator motor 1 is emergency stopped. Was. in this case,
In the conventional DC-excited synchronous generator motor, the field breaker of the generator motor is opened due to the failure of the exciter.Therefore, the field current flowing in the field winding of the generator motor is the discharge circuit of the field breaker. The thyristor converter 7 did not come to an emergency stop because it continued to flow though it was attenuated.

【００１０】一方、図１７に示すように、交流励磁同期
発電電動機１は励磁用電源装置であるサイクロコンバー
タ３に故障が発生すると、故障発生と同時に出力電流を
ブロックするため交流励磁同期発電電動機１の励磁電流
は瞬時に消滅するが、サイリスタ変換器７は非常停止用
閉塞継電器８６−１の信号によって制御停止となるた
め、サイリスタ変換器７の出力電流は交流励磁同期発電
電動機１の電機子反作用の影響が励磁電流の消滅ととも
に無くなるので、サイリスタ変換器７は故障していない
にもかかわらず交流励磁同期発電電動機１の励磁電源が
消滅すると過電流が発生して保護動作によって非常停止
するという問題があった。On the other hand, as shown in FIG. 17, in the AC excitation synchronous generator motor 1, when a failure occurs in the cycloconverter 3 which is the excitation power supply device, the output current is blocked at the same time as the occurrence of the failure, so that the AC excitation synchronous generator motor 1 is generated. However, the thyristor converter 7 is controlled by the signal of the emergency stop blocking relay 86-1, so that the output current of the thyristor converter 7 is the armature reaction of the AC excitation synchronous generator-motor 1. Since the influence of the above disappears with the disappearance of the exciting current, there is a problem that an overcurrent occurs when the exciting power supply of the AC excitation synchronous generator motor 1 disappears even though the thyristor converter 7 has not failed, and an emergency stop occurs due to the protection operation. was there.

【００１１】第２に、サイリスタ変換器７によって交流
励磁同期発電電動機１を始動している途中で普通停止す
る場合、図１８に示すように普通停止操作により停止用
継電器が動作し、停止用継電器動作により交流励磁同期
発電電動機１のサイクロコンバータ３の停止とサイリス
タ変換器７の停止と第２の遮断器１１の開放とを同時に
していた。この場合、図１９に示すように、交流励磁同
期発電電動機１のサイクロコンバータ３の停止が先行す
ると、サイリスタ変換器７の出力電流は交流励磁同期発
電電動機１の電機子反作用の影響が励磁電流の消滅とと
もに無くなるので、サイリスタ変換器７は故障していな
いにもかかわらず励磁電源が消滅すると過電流が発生し
て保護動作によって非常停止するという問題があった。Second, when the thyristor converter 7 normally stops the AC excited synchronous generator-motor 1 while it is starting, as shown in FIG. 18, the stop relay operates by the normal stop operation, and the stop relay is operated. By the operation, the stop of the cycloconverter 3 of the AC excitation synchronous generator motor 1, the stop of the thyristor converter 7, and the opening of the second circuit breaker 11 are performed at the same time. In this case, as shown in FIG. 19, when the cycloconverter 3 of the AC excitation synchronous generator motor 1 is stopped first, the output current of the thyristor converter 7 is affected by the armature reaction of the AC excitation synchronous generator motor 1 of the excitation current. Since the thyristor converter 7 disappears as it disappears, there is a problem that an overcurrent occurs when the excitation power supply disappears, and an emergency stop occurs due to a protection operation, even though the thyristor converter 7 is not broken down.

【００１２】第３に、サイリスタ変換器７によって交流
励磁同期発電電動機１を始動し、交流励磁同期発電電動
機１の回転速度が可変速範囲の下限以上となると、交流
励磁同期発電電動機１を始動制御から電力系統へ同期並
入させる制御へ切り替えるが、図２０に示すように、同
期制御継電器の動作で交流励磁同期発電電動機１のサイ
クロコンバータ３の停止とサイリスタ変換器７の停止と
第２の遮断器１１開放とを同時にしている。この場合
に、交流励磁同期発電電動機１のサイクロコンバータ３
の停止が先行すると、サイリスタ変換器７の出力電流は
交流励磁同期発電電動機１の電機子反作用の影響が励磁
電源の消滅とともに無くなるので、サイリスタ変換器７
は故障していないにもかかわらず交流励磁同期発電電動
機１の励磁電源が消滅すると、過電流が発生して保護動
作によって非常停止するという問題があった。Thirdly, when the AC excitation synchronous generator motor 1 is started by the thyristor converter 7 and the rotation speed of the AC excitation synchronous generator motor 1 becomes equal to or higher than the lower limit of the variable speed range, the AC excitation synchronous generator motor 1 is start-controlled. 20 to the control for synchronous parallel insertion into the power system, but as shown in FIG. 20, the operation of the synchronous control relay stops the cycloconverter 3 of the AC excitation synchronous generator motor 1, the thyristor converter 7 and the second interruption. The vessel 11 is open at the same time. In this case, the cycloconverter 3 of the AC excitation synchronous generator motor 1
When the stop occurs, the output current of the thyristor converter 7 disappears because the influence of the armature reaction of the AC excitation synchronous generator motor 1 disappears with the disappearance of the excitation power supply.
However, there is a problem that when the excitation power supply of the AC excitation synchronous generator motor 1 is extinguished even though there is no failure, an overcurrent occurs and the protection operation causes an emergency stop.

【００１３】上記第１から第３の問題が生じると、一般
に、可変速揚水発電プラントでは複数台の交流励磁同期
発電電動機１を１台のサイリスタ変換器７により始動さ
せるような揚水発電システムにおいては、サイリスタ変
換器７の非常停止による原因追求のため多大な時間を要
し、その間残った交流励磁同期発電電動機１を始動でき
ないという問題があった。When the above-mentioned first to third problems occur, generally, in a variable speed pumped storage power generation plant, in a pumped storage power generation system in which a plurality of AC excitation synchronous generator motors 1 are started by one thyristor converter 7. However, there is a problem that it takes a lot of time to search the cause by the emergency stop of the thyristor converter 7 and the AC excitation synchronous generator motor 1 remaining during that time cannot be started.

【００１４】そこで、本発明は始動用電源装置の不要な
過電流の発生を抑止して非常停止を回避する可変速揚水
発電プラントの制御保護装置を提供することを目的とす
る。It is therefore an object of the present invention to provide a control and protection device for a variable speed pumped storage power plant that suppresses the occurrence of unnecessary overcurrent in the starting power supply device and avoids an emergency stop.

【００１５】[0015]

【課題を解決するための手段】請求項１の発明は、固定
子巻線が電力系統に第１の遮断器を介して接続され、回
転子がポンプ水車に接続される交流励磁同期機と、該交
流励磁同期機の始動時に固定子巻線と第２の遮断器を介
して接続し、始動用電源制御装置によって制御されて交
流励磁同期機へ始動電流を供給する始動用電源装置と、
交流励磁同期機の回転子巻線に過電圧防止装置を介して
接続し交流励磁システム制御装置によって制御されて励
磁電流を供給する励磁用電源装置と、プラントを制御す
るプラント制御装置とを有する可変速揚水発電プラント
を制御および保護する可変速揚水発電プラントの制御保
護装置において、交流励磁同期機の始動時に励磁用制御
装置が故障したとき励磁用制御装置を停止し、励磁電流
を消滅させる前に、始動用電源装置を停止させる手段を
設け、始動用電源装置の過電流の発生を抑制するように
したものである。この手段によれば、始動時に励磁用電
源装置が故障したとき、励磁電流が消滅する前に始動用
電源装置が停止される。この結果、始動用電源装置の過
電流の発生が抑制され始動用電源装置が非常停止するこ
とが回避でき、通常の停止へ移行できる。従って、始動
用電源装置の非常停止に伴って原因追求等の復帰に時間
を要することがなくなる。According to a first aspect of the present invention, there is provided an AC excitation synchronous machine in which a stator winding is connected to a power system via a first circuit breaker, and a rotor is connected to a pump turbine. A starting power supply device that is connected to the stator winding via a second breaker at the time of starting the AC excitation synchronous machine, and is controlled by the starting power supply control device to supply a starting current to the AC excitation synchronous machine,
Variable speed having an excitation power supply device connected to a rotor winding of an AC excitation synchronous machine through an overvoltage prevention device and supplied with an excitation current controlled by an AC excitation system control device, and a plant control device controlling a plant In the control protection device of the variable speed pumped storage power plant for controlling and protecting the pumped storage power plant, when the excitation control device fails at the time of starting the AC excitation synchronous machine, the excitation control device is stopped and before the excitation current is extinguished, A means for stopping the starting power supply device is provided to suppress the occurrence of overcurrent in the starting power supply device. According to this means, when the exciting power supply device fails at the time of starting, the starting power supply device is stopped before the exciting current disappears. As a result, it is possible to prevent an overcurrent from being generated in the starting power supply device, prevent the starting power supply device from making an emergency stop, and shift to a normal stop. Therefore, it is not necessary to take time to recover the cause or the like due to the emergency stop of the power supply device for starting.

【００１６】請求項２の発明は、請求項１記載の可変速
揚水発電プラントの制御保護装置において、交流励磁シ
ステム制御装置は、交流励磁同期機の始動時に励磁用電
源装置が故障したとき故障信号を取込み励磁用電源装置
を停止させる手段を設け、始動用電源装置は故障信号を
取込み始動用電源装置を停止させる手段を設け、プラン
ト制御装置は始動用電源装置の停止確認信号を入力する
と第２の遮断器を開き、さらに、交流励磁同期機を非常
停止させる手段を設けるようにしたことである。この手
段によれば、始動時に励磁用電源装置が故障したとき、
励磁用電源装置を停止する一方、始動用電源装置を停止
し、その停止確認信号によって第２の遮断器が開かれ交
流励磁同期機が非常停止される。この結果、始動用電源
装置の過電流の発生が抑制され始動用電源装置が非常停
止することが回避でき、通常の停止へ移行できる。従っ
て、始動用電源装置の非常停止に伴って原因追求等の復
帰に時間を要することがなくなる。According to a second aspect of the present invention, in the control protection device for a variable speed pumped storage hydropower plant according to the first aspect, the AC excitation system control device is a failure signal when the excitation power supply device fails at the time of starting the AC excitation synchronous machine. Means for stopping the take-in and exciting power supply device, the starting power supply device for taking in a failure signal and means for stopping the starting power supply device, and the plant control device receiving a stop confirmation signal of the starting power supply device The circuit breaker is opened, and means for emergency stop of the AC excitation synchronous machine is provided. According to this means, when the excitation power supply unit fails at the time of starting,
While stopping the power supply for excitation, the power supply for start is stopped, and the second circuit breaker is opened by the stop confirmation signal to emergency stop the AC excitation synchronous machine. As a result, it is possible to prevent an overcurrent from being generated in the starting power supply device, prevent the starting power supply device from making an emergency stop, and shift to a normal stop. Therefore, it is not necessary to take time to recover the cause or the like due to the emergency stop of the power supply device for starting.

【００１７】請求項３の発明は、請求項１記載の可変速
揚水発電プラントの制御保護装置において、交流励磁シ
ステム制御装置は、交流励磁同期機の始動時に励磁用電
源装置が故障したとき故障信号を取込み励磁用電源装置
を停止させ、停止確認信号を出力する手段を設け、プラ
ント制御装置は停止確認信号を入力して第２の遮断器を
開き、始動用電源制御装置を介して始動用電源装置を停
止させ交流励磁同期機を非常停止する手段を設け、故障
信号によって励磁用電源装置の出力側に接続される過電
圧防止装置を動作させて励磁電流を流して交流励磁同期
機へ流れる励磁電流を徐々に減衰させる手段とを設ける
ようにしたものである。この手段によれば、始動時に励
磁用電源装置が故障したとき、励磁用電源装置が停止さ
れる一方、過電圧防止装置が動作されて励磁電流が徐々
に減衰され、励磁電流の消滅前に始動用電源装置も停止
される。この結果、始動用電源装置の過電流の発生が抑
制され始動用電源装置が非常停止することが回避でき、
通常の停止へ移行できる。従って、始動用電源装置の非
常停止に伴って原因追求等の復帰に時間を要することが
なくなる。According to a third aspect of the present invention, in the control protection device for a variable speed pumped storage hydropower plant according to the first aspect, the AC excitation system control device gives a failure signal when the excitation power supply device fails at the time of starting the AC excitation synchronous machine. A means for outputting the stop confirmation signal by taking in the excitation power supply device is provided, the plant control device inputs the stop confirmation signal and opens the second circuit breaker, and the starter power supply device is started via the starter power supply control device. A means to stop the device and an emergency stop of the AC excitation synchronous machine is provided, and the overvoltage prevention device connected to the output side of the excitation power supply device is operated by the failure signal to flow the excitation current and the excitation current flowing to the AC excitation synchronous machine. And means for gradually attenuating. According to this means, when the exciting power supply unit fails at the time of starting, the exciting power supply unit is stopped, while the overvoltage protection device is operated to gradually attenuate the exciting current, and the starting current is used before the exciting current disappears. The power supply is also shut down. As a result, it is possible to prevent the occurrence of overcurrent in the starting power supply device and prevent the starting power supply device from making an emergency stop.
It is possible to shift to a normal stop. Therefore, it is not necessary to take time to recover the cause or the like due to the emergency stop of the power supply device for starting.

【００１８】請求項４の発明は、固定子巻線が電力系統
に第１の遮断器を介して接続され、回転子がポンプ水車
に接続される交流励磁同期機と、該交流励磁同期機の始
動時に固定子巻線と第２の遮断器を介して接続し、始動
用電源制御装置によって制御されて交流励磁同期機へ始
動電流を供給する始動用電源装置と、交流励磁同期機の
回転子巻線に過電圧防止装置を介して接続し交流励磁シ
ステム制御装置によって制御されて励磁電流を供給する
励磁用電源装置と、プラントを制御するプラント制御装
置とを有する可変速揚水発電プラントを制御および保護
する可変速揚水発電プラントの制御保護装置において、
交流励磁同期機の始動時に交流励磁同期機の普通停止操
作をする場合に始動用電源装置を先に停止させその後に
励磁用電源装置を停止させる手段を設け、始動用電源装
置の過電流の発生を抑制するようにしたものである。こ
の手段によれば、始動時に普通停止操作がされるとき、
励磁電流が消滅する前に始動用電源装置が停止される。
この結果、始動用電源装置が過電流を流すことがなくな
り、過電流の発生によって始動用電源装置が非常停止す
ることを回避できる。従って、始動用電源装置の非常停
止に伴う原因追求等に要した多大の時間や労力等が不要
となる。According to a fourth aspect of the present invention, an AC excitation synchronous machine in which a stator winding is connected to a power system via a first circuit breaker, and a rotor is connected to a pump turbine, and an AC excitation synchronous machine of the AC excitation synchronous machine. A starting power supply device, which is connected to the stator winding via a second breaker at the time of starting, is controlled by a starting power supply control device to supply a starting current to the AC excitation synchronous machine, and a rotor of the AC excitation synchronous machine. Control and protection of a variable speed pumped storage power plant having an excitation power supply device connected to a winding through an overvoltage prevention device and controlled by an AC excitation system control device to supply an excitation current, and a plant control device controlling the plant In the control protection device of the variable speed pumped storage power plant to
When the AC excitation synchronous machine is normally started at the time of starting the AC excitation synchronous machine, a means for stopping the starting power supply device first and then stopping the excitation power supply device is provided to generate an overcurrent in the starting power supply device. Is to suppress. According to this means, when the normal stop operation is performed at the start,
The starting power supply is stopped before the exciting current disappears.
As a result, the starting power supply device does not flow an overcurrent, and it is possible to avoid the emergency stop of the starting power supply device due to the occurrence of the overcurrent. Therefore, a large amount of time, labor, and the like required for pursuing causes associated with the emergency stop of the power supply device for starting are unnecessary.

【００１９】請求項５の発明は、請求項４記載の可変速
揚水発電プラントの制御保護装置において、プラント制
御装置は、交流励磁同期機の始動時に普通停止信号が入
力すると始動用電源制御装置へ始動用電源装置を停止さ
せる停止信号を出力する一方、始動用電源制御装置から
停止確認信号を取込むと、交流励磁システム制御装置へ
励磁用電源装置を停止させる停止信号を出力し、第２の
遮断器を開くようにしたものである。この手段によれ
ば、始動時に普通停止信号が入力すると、始動用電源装
置が停止されその停止確認信号によって励磁用電源装置
が停止され、第２の遮断器が開かれる。この結果、始動
用電源装置が過電流を流すことがなくなり、過電流の発
生によって始動用電源装置が非常停止することを回避で
きる。従って、始動用電源装置の非常停止に伴う原因追
求等に要した多大の時間や労力等が不要となる。According to a fifth aspect of the present invention, in the control protection device for a variable speed pumped storage hydropower plant according to the fourth aspect, the plant control device sends to the starting power supply control device when a normal stop signal is input at the time of starting the AC excitation synchronous machine. While outputting a stop signal for stopping the starting power supply device, when a stop confirmation signal is taken from the starting power supply control device, a stop signal for stopping the excitation power supply device is output to the AC excitation system control device, and the second It is designed to open the circuit breaker. According to this means, when the normal stop signal is input at the time of starting, the starting power supply device is stopped and the excitation power supply device is stopped by the stop confirmation signal, and the second circuit breaker is opened. As a result, the starting power supply device does not flow an overcurrent, and it is possible to avoid the emergency stop of the starting power supply device due to the occurrence of the overcurrent. Therefore, a large amount of time, labor, and the like required for pursuing causes associated with the emergency stop of the power supply device for starting are unnecessary.

【００２０】請求項６の発明は、請求項４記載の可変速
揚水発電プラントの制御保護装置において、交流励磁同
期機の始動時にプラント制御装置へ普通停止信号が入力
するとプラント制御装置は始動用電源制御装置へ始動用
電源装置を停止させる停止信号を出力する一方、限時継
電器を動作させ限時動作の終了後に交流励磁システム制
御装置へ励磁用電源装置を停止させる停止信号を出力す
る一方、第２の遮断器を開くようにしたものである。こ
の手段によれば、始動時に普通停止信号が入力すると、
始動用電源装置が停止され限時動作終了後に励磁用電源
装置が停止され、第２の遮断器が開かれる。この結果、
始動用電源装置が過電流を流すことがなくなり、過電流
の発生によって始動用電源装置が非常停止することを回
避できる。従って、始動用電源装置の非常停止に伴う原
因追求等に要した多大の時間や労力等が不要となる。According to a sixth aspect of the present invention, in the control protection device for a variable speed pumped storage power generation plant according to the fourth aspect, when a normal stop signal is input to the plant control device at the time of starting the AC excitation synchronous machine, the plant control device is provided with a starting power source. While outputting a stop signal for stopping the starting power supply device to the control device, outputting a stop signal for stopping the excitation power supply device to the AC excitation system control device after operating the time delay relay and outputting the second signal to the AC excitation system control device. It is designed to open the circuit breaker. According to this means, when a normal stop signal is input at the start,
After the start-up power supply is stopped and the timed operation is completed, the excitation power-supply is stopped and the second circuit breaker is opened. As a result,
It is possible to prevent the starting power supply device from passing an overcurrent, and prevent the starting power supply device from making an emergency stop due to the occurrence of the overcurrent. Therefore, a large amount of time, labor, and the like required for pursuing causes associated with the emergency stop of the power supply device for starting are unnecessary.

【００２１】請求項７の発明は、固定子巻線が電力系統
に第１の遮断器を介して接続され、回転子がポンプ水車
に接続される交流励磁同期機と、該交流励磁同期機の始
動時に固定子巻線と第２の遮断器を介して接続し、始動
用電源制御装置によって制御されて交流励磁同期機へ始
動電流を供給する始動用電源装置と、交流励磁同期機の
回転子巻線に過電圧防止装置を介して接続し交流励磁シ
ステム制御装置によって制御されて励磁電流を供給する
励磁用電源装置と、プラントを制御するプラント制御装
置とを有する可変速揚水発電プラントを制御および保護
する可変速揚水発電プラントの制御保護装置において、
交流励磁同期機の始動過程から同期並入するとき、始動
用電源装置を停止した後に、励磁用電源装置を停止させ
る手段を設け、始動用電源装置の過電流の発生を抑制す
るようにしたものである。この手段によれば、始動から
同期並入するとき、励磁電流が消滅する前に始動用電源
装置が停止される。この結果、始動用電源装置が不要な
過電流を発生させて保護動作による非常停止が防止され
る。従って、非常停止に伴う原因追求のために多大の時
間と労力を要することがなくなり、直ちに始動用電源装
置を復帰させることができる。According to a seventh aspect of the present invention, the stator winding is connected to the power system via the first circuit breaker, and the rotor is connected to the pump turbine. A starting power supply device, which is connected to the stator winding via a second breaker at the time of starting, is controlled by a starting power supply control device to supply a starting current to the AC excitation synchronous machine, and a rotor of the AC excitation synchronous machine. Control and protection of a variable speed pumped storage power plant having an excitation power supply device connected to a winding through an overvoltage prevention device and controlled by an AC excitation system control device to supply an excitation current, and a plant control device controlling the plant In the control protection device of the variable speed pumped storage power plant to
A means for suppressing the occurrence of overcurrent in the starting power supply device by providing means for stopping the exciting power supply device after stopping the starting power supply device when the AC excitation synchronous machine is synchronously paralleled from the starting process Is. According to this means, when synchronously entering from the start, the starting power supply device is stopped before the exciting current disappears. As a result, the starting power supply device generates an unnecessary overcurrent and an emergency stop due to the protection operation is prevented. Therefore, it does not require a great deal of time and labor for pursuing the cause associated with the emergency stop, and the starting power supply device can be immediately restored.

【００２２】請求項８の発明は、請求項７記載の可変速
揚水発電プラントの制御保護装置において、プラント制
御装置は、同期並入を許可する同期制御許可条件信号を
入力すると始動用電源制御装置へ始動用電源装置を停止
させる停止信号を出力する手段と、始動用電源制御装置
から停止確認信号を取込むと、交流励磁システム制御装
置へ励磁用電源装置を停止させる停止信号を出力し第２
の遮断器を開く手段を設け、交流励磁システム制御装置
は、第２の遮断器が開いたことを確認する開路信号と励
磁用電源装置の停止確認信号とが入力すると同期制御信
号を励磁用電源装置へ出力する手段を設けるようにした
ものである。この手段によれば、始動から同期並入する
とき、始動用電源装置を停止した停止確認信号によって
励磁用電源装置を停止させると共に、第２の遮断器を開
きこれら確認信号によって同期制御信号が励磁用電源装
置へ出力され揃圧制御へ移行される。この結果、始動用
電源装置が不要な過電流を発生させて保護動作による非
常停止が防止される。従って、非常停止に伴う原因追求
のために多大の時間と労力を要することがなくなり、直
ちに始動用電源装置を復帰させることができる。According to an eighth aspect of the present invention, in the control protection device for a variable speed pumped storage power generation plant according to the seventh aspect, when the plant control device inputs a synchronous control permission condition signal for permitting synchronous parallel insertion, the starting power control device. Means for outputting a stop signal for stopping the starting power supply device and a stop confirmation signal from the starting power supply control device, and outputting a stop signal for stopping the excitation power supply device to the AC excitation system control device.
Means for opening the circuit breaker is provided, and the AC excitation system control device inputs the synchronization control signal to the excitation power supply when the open circuit signal for confirming that the second circuit breaker is opened and the stop confirmation signal for the excitation power supply device are input. A means for outputting to the device is provided. According to this means, when synchronously entering from the start, the excitation power supply device is stopped by the stop confirmation signal for stopping the starting power supply device, and the second circuit breaker is opened to excite the synchronization control signal by these confirmation signals. It is output to the power supply device for use and the pressure is transferred to the uniform pressure control. As a result, the starting power supply device generates an unnecessary overcurrent and an emergency stop due to the protection operation is prevented. Therefore, it does not require a great deal of time and labor for pursuing the cause associated with the emergency stop, and the starting power supply device can be immediately restored.

【００２３】請求項９の発明は、請求項７記載の可変速
揚水発電プラントの制御保護装置において、プラント制
御装置は、同期並入を許可する同期制御許可条件信号を
入力すると始動用電源制御装置へ始動用電源装置を停止
させる停止信号を出力する一方、限時継電器を動作させ
る手段と限時動作終了信号を取込むと、交流励磁システ
ム制御装置へ励磁用電源装置を停止させる停止信号を出
力し第２の遮断器を開く手段とを設け、交流励磁システ
ム制御装置は、第２の遮断器が開いたことを確認する開
路信号と励磁用電源装置の停止確認信号とを入力すると
同期制御信号を励磁用電源装置へ出力する手段を設ける
ようにしたものである。この手段によれば、始動から同
期並入するとき、始動用電源装置を停止させ限時動作後
に励磁用電源装置を停止させると共に、第２の遮断器を
開きこれら確認信号によって同期制御信号が励磁用電源
装置へ出力され揃圧制御へ移行される。この結果、始動
用電源装置が不要な過電流を発生させて保護動作による
非常停止が防止される。従って、非常停止に伴う原因追
求のために多大の時間と労力を要することがなくなり、
直ちに始動用電源装置を復帰させることができる。According to a ninth aspect of the present invention, in the control protection device for a variable speed pumped storage power generation plant according to the seventh aspect, when the plant control device inputs a synchronous control permission condition signal for permitting synchronous parallelization, the starting power supply control device. While outputting a stop signal to stop the power supply for starting to the AC excitation system control device while outputting a stop signal to stop the power supply for starting to the AC excitation system control device, a stop signal to stop the power supply for excitation is output to the AC excitation system control device. 2 means for opening the circuit breaker is provided, and the AC excitation system control device excites the synchronous control signal when the open circuit signal for confirming that the second circuit breaker is opened and the stop confirmation signal for the excitation power supply device are input. A means for outputting to the power supply device for use is provided. According to this means, when synchronously entering from the start, the starting power supply is stopped and the exciting power supply is stopped after the timed operation, and the second circuit breaker is opened so that the synchronization control signal can be excited by the confirmation signal. It is output to the power supply device and is shifted to the uniform pressure control. As a result, the starting power supply device generates an unnecessary overcurrent and an emergency stop due to the protection operation is prevented. Therefore, it does not take a lot of time and effort to find the cause of the emergency stop,
The starting power supply can be immediately restored.

【００２４】[0024]

【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

【００２５】図１は、本発明の第１実施の形態を示す可
変速揚水発電プラントの制御保護装置の制御ブロック図
であって、図１において従来例を示す図１５と同一符号
は、同一部分または相当部分を示している。FIG. 1 is a control block diagram of a control protection device for a variable speed pumped storage hydropower plant according to a first embodiment of the present invention. In FIG. Or a considerable part is shown.

【００２６】図１における本発明の第１実施の形態は、
交流励磁同期発電電動機１の励磁用電源装置であるサイ
クロコンバータ３が始動時に故障したときサイクロコン
バータ３を停止させる一方、始動用電源装置であるサイ
リスタ変換器７を停止させて過電流の発生によるサイリ
スタ変換器７の非常停止を阻止する点に特徴を有する。The first embodiment of the present invention shown in FIG.
When the cycloconverter 3 that is the excitation power supply device of the AC excitation synchronous generator motor 1 fails at the time of starting, the cycloconverter 3 is stopped, while the thyristor converter 7 that is the startup power supply device is stopped to generate an overcurrent. It is characterized in that it prevents an emergency stop of the converter 7.

【００２７】この構成で、図１乃至図３を参照して作用
を説明すると、サイクロコンバータ３により励磁される
交流励磁同期発電電動機１を停止状態から定格速度近傍
へ始動中に、交流励磁同期発電電動機１の励磁用電源装
置であるサイクロコンバータ３に故障が発生した場合、
サイクロコンバータ３から故障信号３ａが交流励磁シス
テム制御装置４へ送出される。これにより、サイクロコ
ンバータ３のゲート制御信号がブロックされＯＦＦとな
る。さらに、サイクロコンバータ３の故障信号３ｂが始
動用電源制御装置９へ他の制御装置を介さず直接転送さ
れ、サイリスタ変換器７のゲート制御信号がブロックさ
れる。これにより、図３に示すように交流励磁同期発電
電動機１の励磁電流の消滅前にサイリスタ変換器７が停
止される。従って、電機子反作用の影響がサイリスタ変
換器７の停止前に残っているためにサイリスタ変換器７
の過電流の発生が阻止される。With this configuration, the operation will be described with reference to FIGS. 1 to 3. While the AC excitation synchronous generator motor 1 excited by the cycloconverter 3 is being started from the stopped state to near the rated speed, the AC excitation synchronous generation is performed. When a failure occurs in the cycloconverter 3 which is the power supply device for exciting the electric motor 1,
The failure signal 3a is sent from the cycloconverter 3 to the AC excitation system control device 4. As a result, the gate control signal of the cycloconverter 3 is blocked and turned off. Further, the failure signal 3b of the cycloconverter 3 is directly transferred to the starting power supply control device 9 without passing through another control device, and the gate control signal of the thyristor converter 7 is blocked. As a result, as shown in FIG. 3, the thyristor converter 7 is stopped before the excitation current of the AC excitation synchronous generator motor 1 disappears. Therefore, since the influence of the armature reaction remains before the thyristor converter 7 is stopped, the thyristor converter 7
Generation of overcurrent is prevented.

【００２８】さらに、交流励磁システム制御装置４から
サイクロコンバータ３の故障を交流励磁システムの故障
信号４ａとしてプラント制御装置１３へ送出され、図示
しない閉塞用継電器８６−１を動作させ、閉塞用継電器
の信号１３ａにより第２の遮断器１１が開放されると同
時に、プラント制御装置１３により交流励磁同期発電電
動機１およびポンプ水車２を非常停止制御する。Further, the fault of the cycloconverter 3 is sent from the AC excitation system control unit 4 to the plant control unit 13 as a fault signal 4a of the AC excitation system, and the blocking relay 86-1 (not shown) is operated to operate the blocking relay. At the same time that the second circuit breaker 11 is opened by the signal 13a, the plant control device 13 controls the AC excitation synchronous generator-motor 1 and the pump turbine 2 to perform an emergency stop.

【００２９】このように本発明の第１実施の形態によれ
ば、交流励磁同期発電電動機１の励磁用電源装置である
サイクロコンバータ３が故障した場合、交流励磁同期発
電電動機１の励磁電流が消滅する前にその故障信号を他
の装置を介さず始動用電源制御装置９に転送しサイリス
タ変換器７のゲート制御信号をブロックする。従って、
電機子反作用の影響を維持しつつサイリスタ変換器７は
停止するので、サイリスタ変換器７が過電流となる現象
を防止することができ、サイリスタ変換器７の非常停止
によって原因追求のために多大な時間や労力を要するこ
とを回避することができ、早期に復帰することができ
る。特に、始動装置１台で複数の交流励磁同期発電電動
機１を始動させる可変速プラントでは、残りの交流励磁
同期発電電動機１の始動が早期にできる。As described above, according to the first embodiment of the present invention, when the cycloconverter 3 which is the excitation power supply device of the AC excitation synchronous generator motor 1 fails, the excitation current of the AC excitation synchronous generator motor 1 disappears. Before that, the failure signal is transferred to the starting power supply control device 9 without passing through another device to block the gate control signal of the thyristor converter 7. Therefore,
Since the thyristor converter 7 stops while maintaining the influence of the armature reaction, it is possible to prevent the phenomenon that the thyristor converter 7 becomes an overcurrent, and the emergency stop of the thyristor converter 7 makes a great deal of effort for pursuing the cause. The time and labor required can be avoided, and it is possible to return quickly. Particularly, in a variable speed plant in which a plurality of AC excitation synchronous generator-motors 1 are started by one starting device, the remaining AC excitation synchronous generator-motors 1 can be started early.

【００３０】図４は、本発明の第２実施の形態を示す可
変速揚水発電プラントの制御保護装置の制御ブロック図
であって、図４において従来例を示す図１５と同一符号
は、同一部分または相当部分を示している。FIG. 4 is a control block diagram of a control and protection device for a variable speed pumped storage power generation plant according to a second embodiment of the present invention. In FIG. 4, the same reference numerals as those in FIG. Or a considerable part is shown.

【００３１】図４における本発明の第２実施の形態は、
交流励磁同期発電電動機１が始動中にサイクロコンバー
タ３が故障したとき、サイクロコンバータ３を停止させ
ると共に、過電圧防止装置１４の電力変換器を点弧させ
過電圧防止装置１４へ励磁電流を流すことによって交流
励磁同期発電電動機１の励磁電流を徐々に減衰させ、そ
の間にサイリスタ変換器７を停止させ過電流の発生を阻
止する点に特徴を有する。The second embodiment of the present invention shown in FIG.
When the cycloconverter 3 fails during the start of the AC excitation synchronous generator motor 1, the cycloconverter 3 is stopped and the power converter of the overvoltage protection device 14 is ignited to supply an exciting current to the overvoltage protection device 14. It is characterized in that the exciting current of the synchronous synchronous generator-motor 1 is gradually attenuated, and the thyristor converter 7 is stopped during that period to prevent the generation of overcurrent.

【００３２】以上の構成で、図４乃至図６を用いて作用
を説明すると、サイクロコンバータ３により励磁される
交流励磁同期発電電動機１を停止状態から定格速度近傍
へ始動中に、交流励磁同期発電電動機１の励磁用電源装
置であるサイクロコンバータ３に故障が発生じた場合、
サイクロコンバータ３から故障信号３ａが交流励磁シス
テム制御装置４へ送出され、サイクロコンバータ３のゲ
ート制御信号がフロツクされる。さらに、サイクロコン
バータ３の故障信号３ｂが過電圧防止装置１４へ他の制
御装置を介さず直接転送され、過電圧防止装置１４の電
力変換器のゲート制御回路が点弧される。With the above configuration, the operation will be described with reference to FIGS. 4 to 6. While the AC excitation synchronous generator motor 1 excited by the cycloconverter 3 is being started from the stopped state to near the rated speed, the AC excitation synchronous generation is performed. When a failure occurs in the cycloconverter 3 which is the power supply device for exciting the electric motor 1,
The failure signal 3a is sent from the cycloconverter 3 to the AC excitation system controller 4, and the gate control signal of the cycloconverter 3 is blocked. Further, the failure signal 3b of the cycloconverter 3 is directly transferred to the overvoltage protection device 14 without passing through another control device, and the gate control circuit of the power converter of the overvoltage protection device 14 is fired.

【００３３】また、交流励磁システム制御装置４から故
障信号４ａがプラント制御装置１３に送出され、図示し
ない閉塞用継電器８６‐１を動作させ、閉塞用継電器の
信号１３ｂにより始動用電源制御装置９を介してサイリ
スタ変換器７のゲート制御信号をブロックし、閉塞用継
電器の信号１３ａにより第２の遮断器１１が開放され
る。これにより、図６に示すように、励磁電流が過電圧
防止装置１４へ流れ交流励磁同期発電電動機１の励磁電
流が徐々に減衰して流れ、その間にサイリスタ変換器７
が停止される。従って、電機子反作用の影響がサイリス
タ変換器７の停止前に残っているためにサイリスタ変換
器７の過電流の発生が阻止される。Further, the fault signal 4a is sent from the AC excitation system control unit 4 to the plant control unit 13, the unillustrated blocking relay 86-1 is operated, and the starting power control unit 9 is activated by the blocking relay signal 13b. The gate control signal of the thyristor converter 7 is blocked via this, and the second circuit breaker 11 is opened by the signal 13a of the blocking relay. As a result, as shown in FIG. 6, the exciting current flows to the overvoltage prevention device 14, and the exciting current of the AC excitation synchronous generator motor 1 gradually attenuates and flows, during which the thyristor converter 7 operates.
Is stopped. Therefore, since the influence of the armature reaction remains before the thyristor converter 7 is stopped, the overcurrent of the thyristor converter 7 is prevented from occurring.

【００３４】さらに、プラント制御装置１３により交流
励磁同期発電電動機１およびポンプ水車２を非常停止制
御する。Further, the plant control device 13 controls the AC excitation synchronous generator-motor 1 and the pump turbine 2 to perform an emergency stop.

【００３５】このように本発明の第２実施の形態によれ
ば、交流励磁同期発電電動機１の励磁用電源装置である
サイクロコンバータ３が故障した場合、その故障信号を
他の装置を介さず過電圧防止装置１４へ転送し、過電圧
防止装置１４の電力変換器のゲートを点弧するので．交
流励磁同期発電電動機１の回転子巻線に流れていた励磁
電流は過電圧防止装置１４の回路を介して流れ続けるこ
とになり、プラント制御装置１３からの閉塞用継電器の
信号１３ｂを始動用電源制御装置９で受信した後でサイ
リスタ変換器７のゲート制御信号をブロックしても、サ
イリスタ変換器７の出力電流が過電流となることを阻止
できる。As described above, according to the second embodiment of the present invention, when the cycloconverter 3 which is the excitation power supply device of the AC excitation synchronous generator-motor 1 fails, the failure signal is sent to the overvoltage without passing through another device. Since it is transferred to the protection device 14 and the gate of the power converter of the overvoltage protection device 14 is ignited. The exciting current flowing through the rotor winding of the AC excitation synchronous generator motor 1 continues to flow through the circuit of the overvoltage prevention device 14, and the signal 13b of the blocking relay from the plant control device 13 is controlled for starting power supply. Even if the gate control signal of the thyristor converter 7 is blocked after being received by the device 9, the output current of the thyristor converter 7 can be prevented from becoming an overcurrent.

【００３６】図７は、本発明の第３実施の形態を示す可
変速揚水発電プラントの制御保護装置の制御ブロック図
であって、図７において従来例を示す図１５と同一符号
は、同一部分または相当部分を示している。FIG. 7 is a control block diagram of a control and protection device for a variable speed pumped storage power plant showing a third embodiment of the present invention. In FIG. 7, the same reference numerals as those in FIG. Or a considerable part is shown.

【００３７】図７における本発明の第３実施の形態は、
交流励磁同期発電電動機１を始動中に普通停止操作があ
った場合、先に停止させその停止確認信号によってサイ
クロコンバータ３を停止させサイリスタ変換器７の過電
流の発生を阻止する点に特徴を有する。The third embodiment of the present invention shown in FIG.
When the AC excitation synchronous generator motor 1 is normally stopped during starting, it is stopped first, and the cycloconverter 3 is stopped by the stop confirmation signal to prevent the overcurrent of the thyristor converter 7 from being generated. .

【００３８】以上の構成で、図７乃至図９を用いて作用
を説明すると、サイクロコンバータ３により励磁され．
交流励磁同期発電電動機１を停止状態から定格速度近傍
へ始動中に、プラント制御装置１３に図示しない主機の
普通停止信号が入力された場合、サイリスタ変換器７の
始動用電源制御装置９へサイリスタ変換器７の停止信号
１３ｂが送信され、サイリスタ変換器７のゲート制御信
号がブロックされる。そして、始動用電源制御装置９か
らサイリスタ変換器７の停止確認信号９ａがプラント制
御装置１３へ送信され、この停止確認信号９ａを条件に
プラント制御装置１３からサイクロコンバータ停止制御
信号４ｃが交流励磁システム制御装置４へ送信され、サ
イクロコンバータ３のゲート制御信号がブロツクされ
る。そして、サイリスタ変換器７と交流励磁同期発電電
動機１を接続する第２の遮断器１１に開放制御信号１３
ａが送出される。この結果、交流励磁同期発電電動機１
の励磁電流が消滅する前にサイリスタ変換器７が停止さ
れ、電機子反作用の影響によってサイリスタ変換器７の
過電流の発生が抑制された状態でサイリスタ変換器７は
普通停止される。また、プラント制御装置１３からは図
示しないがポンプ水車２を普通停止とする制御信号が出
力されている。The operation of the above structure will be described with reference to FIGS. 7 to 9.
When a normal stop signal of a main engine (not shown) is input to the plant control device 13 while the AC excitation synchronous generator / motor 1 is started from a stopped state to near the rated speed, the thyristor conversion is performed by the thyristor converter 7 to the starting power supply control device 9. The stop signal 13b of the converter 7 is transmitted and the gate control signal of the thyristor converter 7 is blocked. Then, a stop confirmation signal 9a of the thyristor converter 7 is transmitted from the starting power supply control device 9 to the plant control device 13, and the cycloconverter stop control signal 4c is transmitted from the plant control device 13 to the AC excitation system on the condition of this stop confirmation signal 9a. It is transmitted to the control device 4 and the gate control signal of the cycloconverter 3 is blocked. Then, the opening control signal 13 is applied to the second circuit breaker 11 that connects the thyristor converter 7 and the AC excitation synchronous generator-motor 1.
a is sent. As a result, the AC excitation synchronous generator motor 1
The thyristor converter 7 is stopped before the exciting current of (1) disappears, and the thyristor converter 7 is normally stopped in a state where the generation of an overcurrent of the thyristor converter 7 is suppressed by the influence of the armature reaction. Further, although not shown, the plant control device 13 outputs a control signal for normally stopping the pump turbine 2.

【００３９】なお、本発明の他の実施の形態として次の
ように実施できる。Note that another embodiment of the present invention can be implemented as follows.

【００４０】すなわち、図１０および図１１を用いて説
明すると、サイクロコンバータ３により励磁される交流
励磁同期発電電動機１を停止状態から定格速度近傍へ始
動中に、プラント制御装置１３に図示しない主機の普通
停止信号が入力された場合、サイリスタ変換器７の始動
用電源制御装置９にサイリスタ変換器停止信号１３ｂが
送信され、サイリスタ変換器７のゲート制御信号がブロ
ックされる。さらに、プラント制御装置１３内に設けた
図示しない限時継電器を励磁し、この限時継電器が動作
したことを条件にプラント制御装置１３から交流励磁シ
ステム制御装置４に、サイクロコンバータ３のゲート制
御信号をブロックするサイクロコンバータ停止制御信号
４ｃが送出され、サイリスタ変換器７と交流励磁同期発
電電動機１を接続する第２の遮断器１１に閉塞用継電器
の信号１３ａが送出される。この場合においても、図１
１に示すように交流励磁同期発電電動機１の励磁電流が
消滅する前にサイリスタ変換器７が停止しているので電
機子反作用によってサイリスタ変換器７が過電流を出力
し、非常停止することを阻止できる。また、プラント制
御装置１３からは図示しないがポンプ水車２を普通停止
とする制御信号が出力されている。That is, referring to FIG. 10 and FIG. 11, while the AC excitation synchronous generator motor 1 excited by the cycloconverter 3 is being started from the stopped state to near the rated speed, the plant control device 13 does not When the normal stop signal is input, the thyristor converter stop signal 13b is transmitted to the power source control device 9 for starting the thyristor converter 7, and the gate control signal of the thyristor converter 7 is blocked. Further, a time delay relay (not shown) provided in the plant control device 13 is excited, and the gate control signal of the cycloconverter 3 is blocked from the plant control device 13 to the AC excitation system control device 4 on condition that the time delay relay operates. The cycloconverter stop control signal 4c is transmitted, and the signal 13a of the blocking relay is transmitted to the second breaker 11 that connects the thyristor converter 7 and the AC excitation synchronous generator motor 1. Even in this case, FIG.
As shown in 1, the thyristor converter 7 is stopped before the exciting current of the AC excitation synchronous generator motor 1 is extinguished, so the armature reaction prevents the thyristor converter 7 from outputting an overcurrent and preventing an emergency stop. it can. Further, although not shown, the plant control device 13 outputs a control signal for normally stopping the pump turbine 2.

【００４１】このように本発明の第３実施の形態によれ
ば、サイリスタ変換器７により交流励磁同期発電電動機
１を起動する途中で普通停止操作がある場合、プラント
制御装置１３によりサイリスタ変換器７を先に停止と
し、その停止確認信号により交流励磁同期発電電動機１
の励磁用電源であるサイクロコンバータ３のゲート制御
を停止させることにしたので、サイリスタ変換器７の出
力電流が過電流となる現象を防止することができ、主機
を支障なく普通停止とすることが可能である。As described above, according to the third embodiment of the present invention, when the thyristor converter 7 normally starts the AC excitation synchronous generator motor 1 while the thyristor converter 7 is being started, the plant controller 13 causes the thyristor converter 7 to operate. Is stopped first, and by the stop confirmation signal, the AC excitation synchronous generator motor 1
Since it is decided to stop the gate control of the cycloconverter 3 which is the excitation power source, the phenomenon that the output current of the thyristor converter 7 becomes an overcurrent can be prevented, and the main engine can be stopped normally without any trouble. It is possible.

【００４２】図１２は、本発明の第４実施の形態を示す
可変速揚水発電プラントの制御保護装置の制御ブロック
図であって、図１２において従来例を示す図１５と同一
符号は、同一部分または相当部分を示している。FIG. 12 is a control block diagram of a control protection device for a variable speed pumped storage hydropower plant according to a fourth embodiment of the present invention. In FIG. 12, the same reference numerals as those in FIG. Or a considerable part is shown.

【００４３】図１２における本発明の第４実施の形態
は、交流励磁同期発電電動機１の始動から同期並入する
場合に、一旦サイリスタ変換器７を停止し、その停止確
認信号によってサイクロコンバータ３を停止させ、その
後に揃圧制御へ移行する点に特徴を有する。In the fourth embodiment of the present invention shown in FIG. 12, the thyristor converter 7 is temporarily stopped when the AC excitation synchronous generator-motor 1 is started in parallel, and the cycloconverter 3 is stopped by the stop confirmation signal. It is characterized in that it is stopped and then the pressure is shifted to the uniform pressure control.

【００４４】以上の構成で、図１２および図１３を参照
して作用を説明すると、サイクロコンバータ３により励
磁される交流励磁同期発電電動機１を停止状態から定格
速度近傍へ加速した後、交流励磁同期発電電動機１を電
力系統５に同期並入させる場合、プラント制御装置１３
からサイリスタ変換器７の始動用電源制御装置９にサイ
リスタ変換器７の停止信号１３ｂが送信され、サイリス
タ変換器７のゲート制御信号がブロックされる。With the above configuration, the operation will be described with reference to FIGS. 12 and 13. After the AC excitation synchronous generator / motor 1 excited by the cycloconverter 3 is accelerated from the stopped state to near the rated speed, the AC excitation synchronization is performed. When the generator motor 1 is synchronously inserted in the electric power system 5, the plant control device 13
The thyristor converter 7 stop signal 13b is transmitted from the thyristor converter 7 to the starting power supply control device 9 to block the thyristor converter 7 gate control signal.

【００４５】さらに、始動用電源制御装置９からサイリ
スタ変換器７の停止確認信号９ａがプラント制御装置１
３へ送信される。この停止確認信号９ａを条件にプラン
ト制御装置１３からサイクロコンバータ３の停止制御信
号４ｃが交流励磁システム制御装置４へ送信され、サイ
クロコンバータ３のゲート制御信号がブロックされる。
そして、サイリスタ変換器７と交流励磁同期発電電動機
１とを接続する第２の遮断器１１へ開放制御信号１３ａ
が送出される。Further, the stop confirmation signal 9a for the thyristor converter 7 is sent from the starting power supply control device 9 to the plant control device 1.
Sent to 3. On the condition of this stop confirmation signal 9a, the stop control signal 4c of the cycloconverter 3 is transmitted from the plant control device 13 to the AC excitation system control device 4, and the gate control signal of the cycloconverter 3 is blocked.
Then, the open control signal 13a is sent to the second circuit breaker 11 that connects the thyristor converter 7 and the AC excitation synchronous generator-motor 1.
Is sent.

【００４６】さらに、交流励磁同期発電電動機１の励磁
用電源装置が停止していることが交流励磁システム制御
装置４からのサイクロコンバータ３のゲートブロツク信
号４ｂから確認され、第２の遮断器機１１が開路してい
ることを示す開路信号１１ａが入力されると交流励磁シ
ステム制御装置４へ同期制御信号４ｄがプラント制御装
置１３から送信される。この結果、交流励磁システム制
御装置４は再度サイクロコンバータ３のゲート制御信号
を点弧させ、交流励磁同期発電電動機１の電圧と位相を
電力系統に同期させる制御を行なう。Furthermore, it is confirmed from the gate block signal 4b of the cycloconverter 3 from the AC excitation system control unit 4 that the excitation power supply unit of the AC excitation synchronous generator / motor 1 is stopped, and the second breaker unit 11 is activated. When the open circuit signal 11a indicating that the circuit is open is input, the synchronous control signal 4d is transmitted from the plant control device 13 to the AC excitation system control device 4. As a result, the AC excitation system control device 4 again fires the gate control signal of the cycloconverter 3 to perform control to synchronize the voltage and phase of the AC excitation synchronous generator motor 1 with the power system.

【００４７】なお、本発明の第４実施の形態は、次のよ
うに実施できる。すなわち、図１４に示すようにサイク
ロコンバータ３により励磁された交流励磁同期発電電動
機１を停止状態から定格速度近傍へ加速した後、交流励
磁同期発電電動機１を電力系統５に同期並入させる場
合、プラント制御装置１３からサイリスタ変換器の始動
用電源制御装置９にサイリスタ変換器停止制御信号１３
ｂが送信され、サイリスタ変換器７のゲート制御信号を
ブロックすると同時にプラント制御装置１３内に設けた
図示しない限時継電器を動作させ、この限時継電器が動
作終了したことを条件にプラント制御装置１３から交流
励磁システム制御装置４へサイクロコンバータ３のゲー
ト制御信号をブロックするサイクロコンバータ停止制御
信号４ｃを送出すると共に、サイリスタ変換器７と交流
励磁同期発電電動機１を接続する第２の遮断器１１に開
放制御信号１３ａを送出する。The fourth embodiment of the present invention can be implemented as follows. That is, as shown in FIG. 14, when the AC excitation synchronous generator motor 1 excited by the cycloconverter 3 is accelerated from the stopped state to near the rated speed, and then the AC excitation synchronous generator motor 1 is synchronously inserted in the electric power system 5, Thyristor converter stop control signal 13 from the plant control device 13 to the thyristor converter starting power supply control device 9
b is transmitted, the gate control signal of the thyristor converter 7 is blocked, and at the same time, a not shown time delay relay provided in the plant control device 13 is operated. The cycloconverter stop control signal 4c that blocks the gate control signal of the cycloconverter 3 is sent to the excitation system control device 4 and the second circuit breaker 11 that connects the thyristor converter 7 and the AC excitation synchronous generator motor 1 is opened. The signal 13a is transmitted.

【００４８】交流励磁同期発電電動機１の励磁用電源装
置が停止していることを交流励磁システム制御装置４か
らのサイクロコンバータ３のゲートブロツク信号４ｂと
して確認し、第２の遮断器機１１が開放している信号１
ｌａの条件とで交流励磁システム制御装置４に同期制御
信号４ｄとしてプラント制御装置１３から送信し、交流
励磁システム制御装置４で再度サイクロコンバータ３の
ゲート制御信号を点弧し、交流励磁同期発電電動機１の
電圧と位相を電力系統に同期させる制御を行なう。The fact that the excitation power supply unit of the AC excitation synchronous generator motor 1 is stopped is confirmed as the gate block signal 4b of the cycloconverter 3 from the AC excitation system control unit 4, and the second breaker unit 11 is opened. Signal 1
Under the condition of la, it is transmitted from the plant control device 13 to the alternating-current excitation system control device 4 as a synchronous control signal 4d, and the alternating-current excitation system control device 4 fires the gate control signal of the cycloconverter 3 again to generate an alternating-current excitation synchronous generator motor. The control for synchronizing the voltage and phase of 1 with the power system is performed.

【００４９】このように本発明の第４実施の形態によれ
ば、サイクロコンバータ３により励磁された交流励磁同
期発電電動機１を停止状態から定格速度近傍へ加速した
後、交流励磁同期発電電動機１を電力系統５に同期並入
させる場合、プラント制御装置１３によりサイリスタ変
換器７を先に停止し、その停止確認信号により交流励磁
同期発電電動機１の励磁用電源装置であるサイクロコン
バータ３のゲート制御信号を停止させるので、サイリス
タ変換器７が過電流となる事を防止することができ、サ
イリスタ変換器７と交流励磁同期発電電動機１を接続す
る第２の遮断器１１が開放された後に支障なく交流励磁
同期発電電動機１を同期並入制御へ移行させることがで
きる。As described above, according to the fourth embodiment of the present invention, after the AC excitation synchronous generator motor 1 excited by the cycloconverter 3 is accelerated from the stopped state to the vicinity of the rated speed, the AC excitation synchronous generator motor 1 is activated. In the case of synchronous parallel insertion into the power system 5, the plant control device 13 first stops the thyristor converter 7, and the stop confirmation signal causes a gate control signal of the cycloconverter 3 which is the excitation power supply device of the AC excitation synchronous generator motor 1. Therefore, the thyristor converter 7 can be prevented from becoming an overcurrent, and the second circuit breaker 11 that connects the thyristor converter 7 and the AC excitation synchronous generator motor 1 can be opened without any trouble after the opening. The excitation synchronous generator motor 1 can be shifted to the synchronous parallel insertion control.

【００５０】なお、以上説明した実施の形態では交流励
磁同期発電電動機の固定子巻線を始動用電源装置として
のサイリスタ変換器、回転子巻線を励磁用のサイクロコ
ンバータに接続しているが、固定子巻線に励磁用電源装
置としてのサイクロコンバータを接続して励磁し、回転
子巻線に始動用のサイリスタ変換器を接続しても同様の
効果を得ることができる。In the embodiment described above, the stator winding of the AC excitation synchronous generator motor is connected to the thyristor converter as the starting power supply device, and the rotor winding is connected to the excitation cycloconverter. The same effect can be obtained by connecting a cycloconverter as an excitation power supply device to the stator winding for excitation and connecting a starting thyristor converter to the rotor winding.

【００５１】また、以上の実施の形態では、始動用電源
装置としてサイリスタ変換器を用いたが、これに限るこ
となく出力周波数が可変で始動に必要かつ充分な容量を
持つ電源装置であれば良い。代表的な例としてはダイオ
ードコンバータ・トランジスタインバータ変換器、ＧＴ
Ｏコンバータ・インバータ変換器、同期発電機等が適用
できる。Further, in the above embodiments, the thyristor converter is used as the starting power supply device, but the power supply device is not limited to this, and the output frequency is variable and the power supply device has a capacity necessary and sufficient for starting. . Typical examples are diode converter / transistor inverter converter, GT
O converter / inverter converter, synchronous generator, etc. can be applied.

【００５２】[0052]

【発明の効果】以上説明したように請求項１の発明によ
れば、始動時に励磁用電源装置が故障したとき、励磁電
流が消滅する前に始動用電源装置を停止するために始動
用電源装置の過電流の発生を抑制して始動用電源装置が
非常停止することが回避でき、通常の停止へ移行でき、
始動用電源装置の非常停止に伴って原因追求等の復帰に
時間を要することがなくなる。As described above, according to the invention of claim 1, when the exciting power supply device fails at the time of starting, the starting power supply device is stopped in order to stop the starting power supply device before the exciting current disappears. It is possible to prevent the occurrence of overcurrent in the power supply for starting and to prevent an emergency stop of the power supply for startup, and to shift to a normal stop,
With the emergency stop of the power supply unit for starting, it will not take time to recover the cause and so on.

【００５３】請求項２の発明によれば、始動時に励磁用
電源装置が故障したとき、励磁用電源装置を停止する一
方、始動用電源装置を停止し、その停止確認信号によっ
て第２の遮断器が開き交流励磁同期機を非常停止するた
めに始動用電源装置の過電流の発生が抑制されて始動用
電源装置が非常停止することを回避でき、通常の停止へ
移行でき、始動用電源装置の非常停止に伴って原因追求
等の復帰に時間を要することがなくなる。According to the second aspect of the present invention, when the exciting power supply unit fails at the time of starting, the exciting power supply unit is stopped while the starting power supply unit is stopped, and the second circuit breaker is activated by the stop confirmation signal. The emergency stop of the AC power supply synchronous synchronous machine is prevented by the occurrence of overcurrent in the starting power supply device, and the emergency stop of the starting power supply device can be avoided. It will not take time to recover due to an emergency stop.

【００５４】請求項３の発明によれば、始動時に励磁用
電源装置が故障したとき、励磁用電源装置を停止する一
方、過電圧防止装置を動作して励磁電流を徐々に減衰さ
せ、励磁電流の消滅前に始動用電源装置も停止するため
に始動用電源装置の過電流の発生が抑制され始動用電源
装置が非常停止することを回避でき、通常の停止へ移行
でき、始動用電源装置の非常停止に伴って原因追求等の
復帰に時間を要することがなくなる。According to the third aspect of the present invention, when the exciting power supply device fails at the time of start-up, the exciting power supply device is stopped, while the overvoltage prevention device is operated to gradually attenuate the exciting current so that the exciting current Since the power supply for starting also stops before it disappears, it is possible to prevent the occurrence of overcurrent in the power supply for starting and prevent the power supply for start from making an emergency stop. It will not take time to recover the cause when the stoppage occurs.

【００５５】請求項４の発明によれば、始動時に普通停
止操作がされるとき、励磁電流が消滅する前に始動用電
源装置を停止するために始動用電源装置が過電流を流す
ことがなくなり、過電流の発生によって始動用電源装置
が非常停止することを回避でき、始動用電源装置の非常
停止に伴う原因追求等に要した多大の時間や労力等が不
要となる。According to the fourth aspect of the present invention, when the normal stop operation is performed at the time of starting, the starting power supply device is stopped before the exciting current disappears, so that the starting power supply device does not flow an overcurrent. Therefore, it is possible to avoid the emergency stop of the starting power supply device due to the occurrence of the overcurrent, and it is not necessary to spend a great deal of time and labor for pursuing the cause of the emergency stop of the starting power supply device.

【００５６】請求項５の発明によれば、始動時に普通停
止信号が入力すると、始動用電源装置が停止されその停
止確認信号によって励磁用電源装置を停止するために始
動用電源装置の過電流の発生によって始動用電源装置が
非常停止することを回避でき、始動用電源装置の非常停
止に伴う原因追求等に要した多大の時間や労力等が不要
となる。According to the fifth aspect of the present invention, when the normal stop signal is input at the time of starting, the starting power supply unit is stopped, and the overcurrent of the starting power supply unit is stopped in order to stop the excitation power supply unit by the stop confirmation signal. It is possible to avoid an emergency stop of the power supply unit for start-up due to the occurrence, and it is not necessary to spend a great deal of time and labor required for pursuing causes associated with the emergency stop of the power supply unit for start-up.

【００５７】請求項６の発明によれば、始動時に普通停
止信号が入力すると、始動用電源装置が停止され限時動
作終了後に励磁用電源装置を停止するために始動用電源
装置の過電流の発生によって始動用電源装置が非常停止
することを回避でき、始動用電源装置の非常停止に伴う
原因追求等に要した多大の時間や労力等が不要となる。According to the sixth aspect of the present invention, when the normal stop signal is input at the time of starting, the starting power supply device is stopped and the exciting power supply device is stopped after the end of the timed operation, so that the overcurrent of the starting power supply device is generated. Thus, it is possible to prevent the starting power supply device from making an emergency stop, and it is not necessary to spend a great deal of time and labor for pursuing the cause of the emergency stop of the starting power supply device.

【００５８】請求項７の発明によれば、始動から同期並
入するとき、励磁電流が消滅する前に始動用電源装置を
停止するために始動用電源装置が不要な過電流を発生さ
せて保護動作による非常停止が防止でき、非常停止に伴
う原因追求のために多大の時間と労力を要することがな
くなり、始動用電源装置を復帰させることができる。According to the seventh aspect of the invention, when synchronously entering from the start, the starting power supply device is stopped before the exciting current disappears, so that the starting power supply device generates an unnecessary overcurrent for protection. The emergency stop due to the operation can be prevented, a great deal of time and labor is not required for searching the cause associated with the emergency stop, and the starting power supply device can be restored.

【００５９】請求項８の発明によれば、始動から同期並
入するとき、始動用電源装置を停止した停止確認信号に
よって励磁用電源装置を停止させ、その後に揃圧制御へ
移行するようにしたために始動用電源装置の過電流によ
る非常停止が防止でき、原因追求のために多大の時間と
労力を要することがなくなり、始動用電源装置を復帰さ
せることができる。According to the invention of claim 8, when synchronously entering from the start, the excitation power supply device is stopped by the stop confirmation signal for stopping the starting power supply device, and then the control is shifted to the uniform pressure control. Moreover, it is possible to prevent an emergency stop due to an overcurrent in the starting power supply device, and it is possible to restore the starting power supply device without requiring a great deal of time and labor for pursuing the cause.

【００６０】請求項９の発明によれば、始動から同期並
入するとき、始動用電源装置を停止させ限時動作後に励
磁用電源装置を停止させ、揃圧制御へ移行するようにし
たために始動用電源装置の過電流による非常停止が防止
でき、原因追求のために多大の時間と労力を要すること
がなくなり、始動用電源装置を復帰させることができ
る。According to the ninth aspect of the present invention, when synchronously entering from the start, the starting power supply device is stopped and the exciting power supply device is stopped after the time-delayed operation to shift to the uniform pressure control. It is possible to prevent an emergency stop due to an overcurrent of the power supply device, save a great deal of time and labor for pursuing the cause, and it is possible to restore the starting power supply device.

[Brief description of drawings]

【図１】本発明の第１実施の形態を示す可変速揚水発電
プラントの制御保護装置のブロック構成図である。FIG. 1 is a block configuration diagram of a control protection device for a variable speed pumped storage power plant showing a first embodiment of the present invention.

【図２】本発明の第１実施の形態の信号の流れを示すフ
ローチャートである。FIG. 2 is a flowchart showing a signal flow according to the first embodiment of the present invention.

【図３】本発明の第１実施の形態の作用を示すタイムチ
ャートである。FIG. 3 is a time chart showing the operation of the first embodiment of the present invention.

【図４】本発明の第２実施の形態を示す可変速揚水発電
プラントの制御保護装置のブロック構成図である。FIG. 4 is a block configuration diagram of a control protection device for a variable speed pumped storage power plant showing a second embodiment of the present invention.

【図５】本発明の第２実施の形態の信号の流れを示すフ
ローチャートである。FIG. 5 is a flowchart showing a signal flow according to the second embodiment of the present invention.

【図６】本発明の第２実施の形態の作用を示すタイムチ
ャートである。FIG. 6 is a time chart showing the operation of the second embodiment of the present invention.

【図７】本発明の第３実施の形態を示す可変速揚水発電
プラントの制御保護装置のブロック構成図である。FIG. 7 is a block configuration diagram of a control and protection device for a variable speed pumped storage power plant showing a third embodiment of the present invention.

【図８】本発明の第３実施の形態の信号の流れを示すフ
ローチャートである。FIG. 8 is a flowchart showing a signal flow according to the third embodiment of the present invention.

【図９】本発明の第３実施の形態の作用を示すタイムチ
ャートである。FIG. 9 is a time chart showing the operation of the third embodiment of the present invention.

【図１０】本発明の第３実施の形態のの別の形態を示す
信号の流れを示すフローチャートである。FIG. 10 is a flowchart showing a signal flow showing another form of the third embodiment of the present invention.

【図１１】図１０の作用を示すタイムチャートである。11 is a time chart showing the operation of FIG.

【図１２】本発明の第４実施の形態を示す可変速揚水発
電プラントの制御保護装置のブロック構成図である。FIG. 12 is a block configuration diagram of a control protection device for a variable speed pumped storage power plant showing a fourth embodiment of the present invention.

【図１３】本発明の第４実施の形態の信号の流れを示す
フローチャートである。FIG. 13 is a flowchart showing a signal flow according to the fourth embodiment of the present invention.

【図１４】本発明の第４実施の形態の別の形態の信号の
流れを示すフローチャートである。FIG. 14 is a flowchart showing a signal flow of another form of the fourth embodiment of the present invention.

【図１５】従来例を示す可変速揚水発電プラントの制御
保護装置のブロック図である。FIG. 15 is a block diagram of a control protection device for a variable speed pumped storage power plant showing a conventional example.

【図１６】従来例の信号の流れを示す図２に対応するフ
ローチャートである。FIG. 16 is a flowchart corresponding to FIG. 2 showing a signal flow of a conventional example.

【図１７】従来例の信号の流れを示す図２に対応するタ
イムチャートである。FIG. 17 is a time chart corresponding to FIG. 2 showing a signal flow of a conventional example.

【図１８】従来例の信号の流れを示す図８に対応するフ
ローチャートである。FIG. 18 is a flowchart corresponding to FIG. 8 showing a signal flow of a conventional example.

【図１９】従来例の信号の流れを示す図８に対応するタ
イムチャートである。FIG. 19 is a time chart corresponding to FIG. 8 showing a signal flow of a conventional example.

【図２０】従来例の信号の流れを示す図１３に対応する
フローチャートである。FIG. 20 is a flowchart corresponding to FIG. 13 showing a signal flow of a conventional example.

[Explanation of symbols]

１交流励磁同期発電電動機２ポンプ水車３サイクロコンバータ３ａ，３ｂ故障信号４交流励磁システム制御装置４ａ，４ｄ同期制御信号４ｂゲートブロツク信号４ｃサイクロコンバータ停止制御信号５電力系統７サイリスタ変換器９始動用電源制御装置１０第１の遮断器１１第２の遮断器１３プラント制御装置１４過電圧防止装置 1 AC excitation synchronous generator motor 2 pump turbine 3 cyclo converter 3a, 3b Failure signal 4 AC excitation system controller 4a, 4d Synchronous control signal 4b Gate block signal 4c Cyclo converter stop control signal 5 power system 7 Thyristor converter 9 Power supply control device for starting 10 First circuit breaker 11 Second circuit breaker 13 Plant control equipment 14 Overvoltage protection device

───────────────────────────────────────────────────── フロントページの続き (56)参考文献特開平２−41691（ＪＰ，Ａ) 特開平４−183222（ＪＰ，Ａ) 特開昭63−206179（ＪＰ，Ａ) 特開昭63−15684（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) H02P 9/00 H02J 3/38 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-2-41691 (JP, A) JP-A-4-183222 (JP, A) JP-A-63-206179 (JP, A) JP-A-63- 15684 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02P 9/00 H02J 3/38

Claims

(57) [Claims]

1. An AC exciter synchronous machine in which a stator winding is connected to a power system via a first circuit breaker, and a rotor is connected to a pump turbine, and the stator when the AC exciter synchronous machine is started. A starting power supply device that is connected to a winding via a second breaker and is controlled by a starting power supply control device to supply a starting current to the AC excitation synchronous machine; and a rotor winding of the AC excitation synchronous machine. A variable speed pumped storage power plant having a power supply unit for excitation, which is connected via an overvoltage protection device and is supplied with an exciting current under the control of an AC excitation system control unit, and a plant control unit for controlling the plant. In a control protection device for a variable speed pumped storage hydropower plant, when the excitation control device fails at the time of starting the AC excitation synchronous machine, the excitation control device is stopped, and before the excitation current disappears, the start Means for stopping the use power supply provided, control and protection device for a variable speed pumped storage power plant, characterized in that to suppress the occurrence of an overcurrent of the starting power supply.

2. The AC excitation system control device is provided with means for taking a failure signal and stopping the excitation power supply device when the excitation power supply device fails at the time of starting the AC excitation synchronous machine. The device is provided with means for taking the failure signal and stopping the starting power supply device, and the plant control device opens the second circuit breaker when a stop confirmation signal of the starting power supply device is input, and further the AC excitation The control protection device for a variable speed pumped storage power plant according to claim 1, further comprising means for emergency stop of the synchronous machine.

3. A means for outputting the stop confirmation signal, wherein the AC excitation system control device takes in a failure signal when the AC power supply device fails at the time of starting the AC excitation synchronous machine, stops the excitation power supply device, and outputs a stop confirmation signal. The plant control device inputs the stop confirmation signal to open the second circuit breaker, and stops the starting power supply device via the starting power supply control device to emergency stop the AC excitation synchronous machine. Means for operating the overvoltage prevention device connected to the output side of the excitation power supply device by the failure signal to flow an excitation current and gradually attenuate the excitation current flowing to the AC excitation synchronous machine. The control protection device for a variable speed pumped storage power plant according to claim 1.

4. An AC exciter synchronous machine in which a stator winding is connected to a power system via a first circuit breaker, and a rotor is connected to a pump turbine, and the stator when the AC exciter synchronous machine is started. A starting power supply device that is connected to a winding via a second breaker and is controlled by a starting power supply control device to supply a starting current to the AC excitation synchronous machine; and a rotor winding of the AC excitation synchronous machine. A variable speed pumped storage power plant having a power supply unit for excitation, which is connected via an overvoltage protection device and is supplied with an exciting current under the control of an AC excitation system control unit, and a plant control unit for controlling the plant. In a control protection device for a variable speed pumped storage hydropower plant, when the AC excitation synchronous machine is normally stopped at the time of starting the AC excitation synchronous machine, the starting power supply device is stopped first, and then the excitation power source is stopped. Means for stopping the apparatus is provided,
A control protection device for a variable speed pumped storage power plant, which suppresses the occurrence of overcurrent of the starting power supply device.

5. The plant control device outputs a stop signal for stopping the starting power supply device to the starting power supply control device when a normal stop signal is input at the time of starting the AC excitation synchronous machine, while the starting control device outputs the stop signal. When a stop confirmation signal is taken in from the power supply control device, a stop signal for stopping the excitation power supply device is output to the AC excitation system control device, and the second
5. The control protection device for a variable speed pumped storage power plant according to claim 4, wherein the circuit breaker is opened.

6. When a normal stop signal is input to the plant control device at the time of starting the AC excitation synchronous machine, the plant control device outputs to the start power supply control device a stop signal for stopping the start power supply device, 5. The second breaker is opened while a stop signal for operating the time delay relay and stopping the excitation power supply device is output to the AC excitation system control device after the end of the time delay operation. Control and protection device for variable speed pumped storage power plant.

7. An AC exciter synchronous machine in which a stator winding is connected to a power system via a first circuit breaker, and a rotor is connected to a pump turbine, and the stator when the AC exciter synchronous machine is started. A starting power supply device that is connected to a winding via a second breaker and is controlled by a starting power supply control device to supply a starting current to the AC excitation synchronous machine; and a rotor winding of the AC excitation synchronous machine. A variable speed pumped storage power plant having a power supply unit for excitation, which is connected via an overvoltage protection device and is supplied with an exciting current under the control of an AC excitation system control unit, and a plant control unit for controlling the plant. In a control and protection device for a variable speed pumped storage power plant, when entering in parallel from the starting process of the AC excitation synchronous machine,
A control protection device for a variable speed pumped storage power plant, comprising means for stopping the excitation power supply after stopping the starting power supply to suppress the occurrence of overcurrent in the starting power supply.

8. The plant control device outputs a stop signal for stopping the starting power supply device to the starting power supply control device when a synchronous control permission condition signal for permitting synchronous parallel insertion is input, and the starting device. When a stop confirmation signal is fetched from the power supply control device, a means for outputting a stop signal for stopping the excitation power supply device to the AC excitation system control device to open the second circuit breaker is provided, and the AC excitation system control device is provided. Is provided with means for outputting a synchronization control signal to the excitation power supply device when an open circuit signal for confirming that the second circuit breaker is opened and a stop confirmation signal for the excitation power supply device are input. The control and protection device for a variable speed pumped storage power plant according to claim 7.

9. The plant control device outputs a stop signal for stopping the starting power supply device to the starting power supply control device while inputting a synchronous control permission condition signal for allowing synchronous parallel insertion, while operating the time delay relay. Means for opening the second circuit breaker by outputting a stop signal for stopping the excitation power supply device to the alternating current excitation system control device when the time limit operation end signal is received. The device is provided with means for outputting a synchronization control signal to the excitation power supply device when an open circuit signal for confirming that the second circuit breaker is opened and a stop confirmation signal for the excitation power supply device are input. The control protection device for a variable speed pumped storage power plant according to claim 7.