JPH05284794A - Method and apparatus for operating variable speed pumped storage power generation facility - Google Patents
Method and apparatus for operating variable speed pumped storage power generation facilityInfo
- Publication number
- JPH05284794A JPH05284794A JP4070801A JP7080192A JPH05284794A JP H05284794 A JPH05284794 A JP H05284794A JP 4070801 A JP4070801 A JP 4070801A JP 7080192 A JP7080192 A JP 7080192A JP H05284794 A JPH05284794 A JP H05284794A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- converter
- main circuit
- variable speed
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Protection Of Generators And Motors (AREA)
- Control Of Ac Motors In General (AREA)
- Control Of Eletrric Generators (AREA)
- Inverter Devices (AREA)
Abstract
(57)【要約】
【目的】 本発明は、事故除去後における変換装置の再
起動を、より安定に行うことができる可変速揚水発電設
備の運転方法およびその装置の提供にある。
【構成】 ポンプ水車１に接続された巻線形回転子２ａ
を有する発電電動機２と、発電電動機２の回転子２ａを
励磁する逆変換器１５、直流リンクコンデンサ１３およ
び順変換器１２からなる変換装置を備え、かつ発電電動
機２の固定子２ｂを主回路を介して系統と接続する可変
速揚水発電設備において、主回路の電圧を検出する主回
路電圧検出手段１６を備え、主回路電圧検出手段１６が
主回路の電圧を検出し、且つ、主回路に所定の電圧が有
るときには逆変換器１５の運転を停止するとともに順変
換器１２を継続運転して直流リンクコンデンサ１３の電
圧を一定に制御し、主回路に所定の電圧が無いときには
逆変換器１５および順変換器１２の運転を停止する可変
速揚水発電設備の運転方法およびその装置である。
(57) [Summary] [PROBLEMS] The present invention provides a method for operating a variable speed pumped storage power generation facility and a device therefor that can more stably restart a conversion device after an accident is removed. [Structure] Winding rotor 2a connected to pump turbine 1
And a converter including an inverse converter 15 that excites a rotor 2a of the generator motor 2, a DC link capacitor 13, and a forward converter 12, and a stator 2b of the generator motor 2 is a main circuit. In the variable speed pumped storage power generation facility connected to the system via the main circuit, the main circuit voltage detection means 16 for detecting the voltage of the main circuit is provided, the main circuit voltage detection means 16 detects the voltage of the main circuit, and the main circuit is predetermined. When there is a predetermined voltage, the reverse converter 15 is stopped and the forward converter 12 is continuously operated to control the voltage of the DC link capacitor 13 at a constant level. When there is no predetermined voltage in the main circuit, the reverse converter 15 and 1 is a method and an apparatus for operating a variable speed pumped storage power generation facility that stops the operation of the forward converter 12.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、系統の事故時の可変速
揚水発電設備の運転方法およびその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for operating a variable speed pumped storage power generation facility in the event of a system accident.
【０００２】[0002]
【従来の技術】近年の揚水発電所は大容量化するととも
に立地条件やポンプ水車の効率上の要請から高落差、高
速化の傾向にある。従来の揚水発電所においては、発電
電動機が直流励磁機であり、回転速度が一定となるた
め、効率の向上には一定の限度があった。2. Description of the Related Art In recent years, pumped-storage power plants have become larger in capacity and tend to have higher heads and higher speeds due to requirements for location conditions and pump turbine efficiency. In a conventional pumped storage power plant, the generator motor is a DC exciter and the rotation speed is constant, so there is a certain limit to the improvement in efficiency.
【０００３】そこで、最近では直流励磁機の代わりに巻
線形回転子を有する交流励磁機を発電電動機に適用し、
その回転子側に変換装置を接続した交流可変速システム
が採用されはじめている。Therefore, recently, instead of the DC exciter, an AC exciter having a wound rotor is applied to a generator motor,
An AC variable speed system in which a converter is connected to the rotor side has begun to be adopted.
【０００４】図４は、このシステムを用いた従来の可変
速揚水発電設備の構成を示す図である。同図において、
１はポンプ水車であり、２はポンプ水車１に機械的に連
結された発電電動機であって、発電電動機２の固定子巻
線には並列用遮断器３が接続され、この並列用遮断器３
は発電運転用断路器４およびこれに並列に設けられた揚
水運転用断路器５を経た後、主変圧器６および送電線遮
断器７を介して送電線８に接続される。FIG. 4 is a diagram showing a configuration of a conventional variable speed pumped storage power generation facility using this system. In the figure,
Reference numeral 1 is a pump turbine, 2 is a generator motor mechanically connected to the pump turbine 1, and a parallel circuit breaker 3 is connected to a stator winding of the generator motor 2 and the parallel circuit breaker 3
Is connected to the power transmission line 8 via the main transformer 6 and the power transmission line breaker 7 after passing through the power generation operation disconnector 4 and the pumping operation disconnector 5 provided in parallel therewith.
【０００５】また、主変圧器６の低圧側巻線には母線９
が接続される。この母線９には電源遮断器１０、電源変
圧器１１を介して交流を直流に変換する順変換器１２の
入力端が接続され、この順変換器１２の出力端に直流リ
ンクコンデンサ１３、半導体スイッチング素子及び抵抗
からなるチョッパ１４を介して交流を直流に変換する逆
変換器１５の入力端が接続され、この逆変換器１５の出
力端に発電電動機２の巻線形回転子２ａが接続されてい
る。Further, a bus bar 9 is provided on the low voltage side winding of the main transformer 6.
Are connected. An input end of a forward converter 12 for converting alternating current into direct current is connected to the bus bar 9 via a power supply breaker 10 and a power supply transformer 11, and an output end of the forward converter 12 is connected to a DC link capacitor 13 and semiconductor switching. An input end of an inverse converter 15 for converting alternating current into direct current is connected through a chopper 14 composed of an element and a resistor, and an output end of the inverse converter 15 is connected to a winding rotor 2a of the generator motor 2. ..
【０００６】このような構成の可変速揚水発電設備にお
いて、発電運転をするときは、送電線遮断器７、並列用
遮断器３、電源遮断器１０および発電運転用断路器４が
投入された状態で、ポンプ水車１により発電電動機２を
運転することにより発電電動機２から発生する交流電力
は並列用遮断器３、発電運転用断路器４、主変圧器６お
よび送電線遮断器７を介して送電線８に送出される。こ
の場合、交流電力の一部は母線９から電源遮断器１０、
電源変圧器１１を介して順変換器１２に供給され、ここ
で直流に変換された出力が直流リンクコンデンサ１３を
介して、逆変換器１５に与えられることにより発電電動
機２の巻線形回転子２ａが可変周波数の低周波交流によ
り励磁される。In the variable speed pumped storage power generation facility having such a configuration, when the power generation operation is performed, the transmission line breaker 7, the parallel breaker 3, the power source breaker 10 and the power generation operation disconnector 4 are turned on. Then, the AC power generated from the generator motor 2 by operating the generator motor 2 with the pump turbine 1 is sent via the parallel circuit breaker 3, the power generation operation disconnector 4, the main transformer 6 and the transmission line circuit breaker 7. It is sent to the electric wire 8. In this case, part of the AC power is transferred from the bus bar 9 to the power breaker 10,
The output, which is supplied to the forward converter 12 via the power transformer 11 and converted into DC here, is given to the inverse converter 15 via the DC link capacitor 13, whereby the winding rotor 2a of the generator motor 2 is provided. Is excited by a low frequency alternating current of variable frequency.
【０００７】また、揚水運転をするときには、上記発電
運転時の発電運転用断路器４を開放して揚水運転用断路
器５を投入した状態で、送電線８から供給される交流電
力を送電線遮断器７、主変圧器６、揚水運転用断路器５
および並列用遮断器３を介して発電電動機の固定子２ｂ
に加え、また、この交流電力の一部を発電運転の場合と
同様に母線９から電源遮断器１０、電源変圧器１１を介
して順変換器１２に供給して直流電圧に変換し、この直
流電圧を直流リンクコンデンサ１３を介して、逆変換器
１５に与えて発電電動機２の巻線形回転子２ａを可変周
波数の低周波交流により交流励磁することにより、発電
電動機２が電動機として運転され、ポンプ水車１を駆動
して可変速の揚水運転を行う。When the pumping operation is performed, the AC power supplied from the power transmission line 8 is supplied while the power generating operation disconnecting switch 4 in the power generating operation is opened and the pumping operation disconnecting switch 5 is turned on. Circuit breaker 7, Main transformer 6, Pumping operation disconnector 5
And the stator 2b of the generator motor via the parallel circuit breaker 3
In addition, a part of this AC power is supplied from the bus bar 9 to the forward converter 12 via the power source breaker 10 and the power source transformer 11 in the same manner as in the power generating operation, and is converted into a DC voltage. The voltage is applied to the inverse converter 15 via the DC link capacitor 13 to excite the wound rotor 2a of the generator motor 2 with a low-frequency alternating current having a variable frequency, whereby the generator motor 2 is operated as an electric motor, and The water turbine 1 is driven to perform variable speed pumping operation.
【０００８】ところで、このような可変速揚水運転設備
において、送電線８で三相短絡事故や一相地絡事故等が
発生すると、事故電流が発電電動機２の回転子巻線２ａ
から逆変換器１５を経て直流リンクコンデンサ１３に流
れ込み、直流リンクコンデンサ電圧Ｖｃが急激に上昇す
る。そこで、このような場合には、事故電流が検出され
ると一旦順変換器１２および逆変換器１５を共に停止す
ると同時にチョッパ１４を動作させ、直流リンクコンデ
ンサ電圧Ｖｃを低下させている。すなわち、チョッパ１
４の半導体スイッチング素子を動作させると直流リンク
コンデンサ１３に蓄えられたエネルギ−が抵抗を通して
放出されることにより消費され、直流リンクコンデンサ
電圧Ｖｃを低下させている。そして、事故電流が解消さ
れると順変換器１２および逆変換器１５を共に再起動さ
せている。By the way, in such a variable speed pumping operation facility, when a three-phase short-circuit accident or a one-phase ground fault accident occurs in the power transmission line 8, a fault current causes a rotor winding 2a of the generator motor 2.
Through the inverse converter 15 to the DC link capacitor 13, and the DC link capacitor voltage Vc rises sharply. Therefore, in such a case, when the fault current is detected, both the forward converter 12 and the inverse converter 15 are once stopped and at the same time the chopper 14 is operated to lower the DC link capacitor voltage Vc. That is, the chopper 1
When the semiconductor switching element of No. 4 is operated, the energy stored in the DC link capacitor 13 is consumed by being released through the resistor, and the DC link capacitor voltage Vc is lowered. Then, when the fault current is eliminated, both the forward converter 12 and the inverse converter 15 are restarted.
【０００９】[0009]
【発明が解決しようとする課題】このように従来の揚水
発電設備の運転方法では、事故電流が検出される毎に、
事故の大きさに関係なく順変換器１２と逆変換器１５と
を共に停止した後、チョッパ１４を動作させ、事故電流
の流入により上昇する直流リンクコンデンサ電圧Ｖｃを
低下させ、その後、事故が除去されると順変換器１２お
よび逆変換器１５を再起動して通常運転に復帰させてい
る。しかし、かかる運転方法では事故の種類に関係なく
事故のたびに順変換器１２および逆変換器１５を一旦停
止させているため、通常運転への復帰の際、順変換器１
２および逆変換器１５の再起動時の直流リンクコンデン
サ電圧Ｖｃに大きなバラツキがあり、安定な再起動がで
きないという問題がある。As described above, in the conventional method of operating a pumped storage power generation facility, each time a fault current is detected,
Regardless of the magnitude of the accident, after stopping both the forward converter 12 and the inverse converter 15, the chopper 14 is operated to reduce the DC link capacitor voltage Vc that rises due to the inflow of the accident current, and then the accident is eliminated. Then, the forward converter 12 and the inverse converter 15 are restarted to return to normal operation. However, in such an operating method, the forward converter 12 and the inverse converter 15 are temporarily stopped for each accident regardless of the type of the accident, so that the normal converter 1 is restored when returning to the normal operation.
2 and the DC converter capacitor voltage Vc at the time of restarting the inverse converter 15 have large variations, and there is a problem that stable restart cannot be performed.
【００１０】本発明は上記実情を考慮してなされたもの
で、事故除去時における変換装置の再起動を、より安定
に行うことができる可変速揚水発電設備の運転方法およ
びその装置を提供することを目的とする。The present invention has been made in consideration of the above circumstances, and provides a method of operating a variable speed pumped storage power generation facility and a device therefor capable of more stably restarting a conversion device when an accident is eliminated. With the goal.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するため
に本発明方法は、ポンプ水車に連結された巻線形回転子
を有する発電電動機と、交流入力を直流に変換する順変
換器、この順変換器より出力される直流を一定電圧に維
持する直流リンクコンデンサおよび前記順変換器より出
力される直流を交流に変換して前記発電電動機の回転子
を励磁する逆変換器からなる変換装置を備え、かつ前記
発電電動機の固定子を主回路を介して系統に接続してな
る可変速揚水発電設備において、前記主回路の電圧を検
出する主回路電圧検出手段を設け、可変速揚水発電設備
の運転中に、前記主回路電圧検出手段により検出された
系統事故時の主回路電圧が所定の電圧に達しているとき
には前記逆変換器の運転を停止するとともに前記順変換
器を継続運転して前記直流リンクコンデンサの電圧を一
定に制御し、前記主回路電圧が所定電圧に達していない
ときには前記逆変換器および前記順変換器を停止させ
る。In order to solve the above-mentioned problems, the method of the present invention comprises a generator-motor having a wound rotor connected to a pump turbine, a forward converter for converting an AC input into a DC, and a forward converter. The converter includes a DC link capacitor that maintains the DC output from the converter at a constant voltage and an inverse converter that converts the DC output from the forward converter into AC and excites the rotor of the generator motor. Also, in a variable speed pumped storage power generation facility in which a stator of the generator motor is connected to a system via a main circuit, main circuit voltage detection means for detecting the voltage of the main circuit is provided to operate the variable speed pumped storage power generation facility. Among them, when the main circuit voltage at the time of a system fault detected by the main circuit voltage detecting means has reached a predetermined voltage, the operation of the reverse converter is stopped and the forward converter is continuously operated. Controlling the voltage of the serial DC link capacitor to a constant, the main circuit voltage when not reach a predetermined voltage to stop the inverter and the forward converter.
【００１２】また、本発明装置は、ポンプ水車に連結さ
れた巻線形回転子を有する発電電動機と、交流入力を直
流に変換する順変換器、この順変換器より出力される直
流を一定電圧に維持する直流リンクコンデンサおよび前
記順変換器より出力される直流を交流に変換して前記発
電電動機の回転子を励磁する逆変換器からなる変換装置
を備え、かつ前記発電電動機の固定子を主回路を介して
系統に接続してなる可変速揚水発電設備において、可変
速揚水発電設備の運転中に前記主回路の電圧を検出する
電圧検出手段と、この電圧検出手段により検出された系
統事故時の主回路電圧が所定の電圧に達しているか否か
を判定する判定手段と、前記主回路電圧が所定の電圧に
達しているときには前記逆変換器の運転を停止するとと
もに前記順変換器を継続運転して前記直流リンクコンデ
ンサの電圧を一定に制御し、前記主回路電圧が所定電圧
に達していないときには前記逆変換器および前記順変換
器を停止させる変換器制御手段とを備える。Further, the device of the present invention comprises a generator motor having a wound rotor connected to a pump turbine, a forward converter for converting an AC input into a direct current, and a direct current output from the forward converter into a constant voltage. The main circuit includes a DC link capacitor for maintaining and a conversion device including an inverse converter that converts direct current output from the forward converter to alternating current to excite the rotor of the generator motor, and the stator of the generator motor is a main circuit. In the variable speed pumped storage power generation equipment connected to the grid via, the voltage detection means for detecting the voltage of the main circuit during the operation of the variable speed pumped storage power generation equipment, and in the case of a grid fault detected by this voltage detection means Determining means for determining whether or not the main circuit voltage has reached a predetermined voltage, and when the main circuit voltage has reached a predetermined voltage, the operation of the inverse converter is stopped and the forward converter The voltage of the DC link capacitor is controlled constant by continuous operation, when the main circuit voltage does not reach the predetermined voltage and a converter control means for stopping the inverter and the forward converter.
【００１３】[0013]
【作用】従って、本発明による可変速揚水発電設備の運
転方法およびその装置にあっては、系統の事故時に主回
路電圧検出手段により検出される主回路電圧が所定の電
圧に達していなければ従来と同様に順変換器、逆変換器
を一旦停止させるが、主回路電圧が所定の電圧に達して
いるときは順変換器を継続運転して直流リンクコンデン
サの電圧が一定に制御されるので、変換装置の再起動時
における直流リンクコンデンサ電圧の変動が少なくな
り、事故除去後の可変速揚水発電設備を安定に運転する
ことができる。Therefore, in the method and apparatus for operating a variable speed pumped storage power generation facility according to the present invention, if the main circuit voltage detected by the main circuit voltage detection means at the time of a system fault has not reached a predetermined voltage, it is conventional. Similarly, the forward converter and the inverse converter are temporarily stopped, but when the main circuit voltage reaches a predetermined voltage, the forward converter is continuously operated and the voltage of the DC link capacitor is controlled to be constant. The fluctuation of the DC link capacitor voltage when the converter is restarted is reduced, and the variable speed pumped storage power generation facility after the accident is eliminated can be stably operated.
【００１４】[0014]
【実施例】以下、本発明を適用した可変速揚水発電設備
の運転方法およびその装置の一実施例について、図面を
参照して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for operating a variable speed pumped storage power generation facility and an apparatus thereof to which the present invention is applied will be described below with reference to the drawings.
【００１５】図１は本発明を適用した可変速揚水発電設
備の構成を示す図で、図４と同一部分には同一符号を付
してその説明を省略し、ここでは異なる部分について述
べる。すなわち、図１において、図４と異なる点は母線
９に主回路電圧検出手段１６を接続する構成とした点に
ある。この主回路電圧検出手段１６は母線９の電圧を検
出する機能をもっている。図２は本発明に係る可変速揚
水発電設備の運転装置の機能ブロックを示す図である。
同図において、１６は母線９の電圧を検出する主回路電
圧検出手段、１７はこの主回路電圧検出手段１６により
検出された母線電圧値が入力される判定手段で、この判
定手段１７は、母線電圧値が所定の電圧値に達している
か否かを判別する第１の判定部１７ａと事故電流検出信
号の有無から直流リンクコンデンサに事故電流が流入し
ているか否かを判定し、その判定結果を第１の判定部１
７ａに与える第２の判定部１７ｂとから構成されてい
る。また、１８は判定手段１７の判別結果に応じて逆変
換器又は順変換器に停止または継続運転の制御指令を与
える変換器制御手段である。すなわち、この変換器制御
手段１８は判定手段１７の第１の判定部１７ａにより母
線電圧が所定の電圧に達していないと判別されると逆変
換器１５および順変換器１２の停止指令を与え、母線電
圧が所定の電圧に達していると判定され、且つ、第２の
判定部１７ｂにより事故電流検出信号があることを検出
すると逆変換器１５に停止指令および順変換器１２に継
続運転指令を与える。FIG. 1 is a diagram showing a configuration of a variable speed pumped storage power generation facility to which the present invention is applied. The same parts as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different parts will be described. That is, FIG. 1 differs from FIG. 4 in that the main circuit voltage detecting means 16 is connected to the bus bar 9. The main circuit voltage detecting means 16 has a function of detecting the voltage of the bus 9. FIG. 2 is a diagram showing functional blocks of the operating device of the variable speed pumped storage power generation facility according to the present invention.
In the figure, 16 is a main circuit voltage detecting means for detecting the voltage of the bus 9, and 17 is a judging means to which the bus voltage value detected by the main circuit voltage detecting means 16 is input. It is determined whether or not a fault current is flowing into the DC link capacitor based on the presence / absence of a fault current detection signal and the first determination unit 17a that determines whether or not the voltage value has reached a predetermined voltage value, and the determination result The first determination unit 1
It is composed of a second judging section 17b which is provided to 7a. Reference numeral 18 is a converter control means for giving a control command for stopping or continuing operation to the inverse converter or the forward converter according to the determination result of the determining means 17. That is, the converter control means 18 gives a stop command for the inverse converter 15 and the forward converter 12 when the first judging section 17a of the judging means 17 judges that the bus voltage has not reached the predetermined voltage. When it is determined that the bus voltage has reached a predetermined voltage, and when the second determination unit 17b detects that there is a fault current detection signal, a stop command is issued to the inverse converter 15 and a continuous operation command is issued to the forward converter 12. give.
【００１６】次に、系統事故時における揚水発電設備の
運転について図３のフローチャートを用いて説明する。
先ず、送電線８等で三相短絡事故や一相地絡事故等が発
生して、検出した母線電圧（ＳＴ１）が所定の電圧に達
していない場合（ＳＴ２）には、従来と同様に順変換器
１２と逆変換器１５とを停止させ（ＳＴ３，４）、その
後、逆変換器１５を経て直流リンクコンデンサ１３に流
入する事故電流により直流リンクコンデンサ電圧Ｖｃが
上昇すると、チョッパ１４の動作により直流リンクコン
デンサに蓄えられたエネルギーを消費させ、直流リンク
コンデンサ電圧Ｖｃを元に戻すように制御する。Next, the operation of the pumped storage power generation facility at the time of a system fault will be described with reference to the flowchart of FIG.
First, when a three-phase short-circuit accident, a one-phase ground fault accident, or the like has occurred in the power transmission line 8 or the like and the detected bus voltage (ST1) has not reached a predetermined voltage (ST2), the procedure is the same as in the conventional case. When the DC link capacitor voltage Vc rises due to the fault current flowing into the DC link capacitor 13 via the inverse converter 15 after stopping the converter 12 and the inverse converter 15 (ST3, 4), the chopper 14 operates. The energy stored in the DC link capacitor is consumed to control the DC link capacitor voltage Vc to the original value.
【００１７】一方、一相地絡事故等で、検出した母線電
圧（ＳＴ１）が所定の電圧に達していると判定手段１７
の第１の判定部１７ａにより判定され（ＳＴ２）、第２
の判定部１７ｂで事故電流検出信号の有無が判定される
と（ＳＴ５）、前述同様に逆変換器１５を停止させる
（ＳＴ６）が、順変換器１２は継続運転が行われ（ＳＴ
７）、直流リンクコンデンサ電圧Ｖｃが一定になるよう
に制御（ＳＴ８）される。On the other hand, the judgment means 17 determines that the detected bus voltage (ST1) has reached a predetermined voltage due to a one-phase ground fault or the like.
Is determined by the first determining unit 17a (ST2), the second
When the presence / absence of the fault current detection signal is determined by the determination unit 17b (ST5), the inverse converter 15 is stopped as described above (ST6), but the forward converter 12 is continuously operated (ST).
7) The DC link capacitor voltage Vc is controlled to be constant (ST8).
【００１８】このとき、順変換器１２の電源側である母
線９には少なくとも所定の電圧があるので、発電電動機
２の回転子巻線から逆変換器１５を経て直流リンクコン
デンサ１３に事故電流が流入するが、この事故電流は順
変換器１２を経て母線９へ回生され、この順変換器１２
は、いわゆる回生運転を行うことになる。従って、直流
リンクコンデンサ１３へ流入する事故電流は回生電流と
して母線９へ送られるので、直流リンクコンデンサ電圧
Ｖｃの上昇は抑制される。At this time, since there is at least a predetermined voltage on the bus 9 on the power supply side of the forward converter 12, a fault current flows from the rotor winding of the generator motor 2 to the DC link capacitor 13 via the reverse converter 15. Although it flows in, this fault current is regenerated to the bus 9 via the forward converter 12, and the forward converter 12
Will perform so-called regenerative operation. Therefore, since the fault current flowing into the DC link capacitor 13 is sent to the bus 9 as a regenerative current, the rise of the DC link capacitor voltage Vc is suppressed.
【００１９】また、直流リンクコンデンサ１３へ流入す
る事故電流の大きさが順変換器１２を経て回生される回
生電流の最大可能な値を上回ったときのみ直流リンクコ
ンデンサ電圧Ｖｃが上昇するが、その時にはチョッパ１
４を動作させることにより、直流リンクコンデンサ電圧
Ｖｃの上昇を抑制することができる。さらに、順変換器
１２は運転を継続しているので、事故が除去された後の
通常運転への復帰のときに再起動させるのは逆変換器１
５のみで済む。The DC link capacitor voltage Vc rises only when the magnitude of the fault current flowing into the DC link capacitor 13 exceeds the maximum possible value of the regenerative current regenerated through the forward converter 12. Sometimes chopper 1
By operating No. 4, it is possible to suppress the rise of the DC link capacitor voltage Vc. Further, since the forward converter 12 continues to operate, it is the reverse converter 1 that is restarted when returning to normal operation after the accident is eliminated.
Only 5 is required.
【００２０】上述したように本実施例では、主回路電圧
検出手段１６により、送電線８等の短絡事故や地絡事故
時の母線電圧を検出し、この母線電圧が所定の電圧値に
達していると判定部１７が判定した場合には、変換器制
御手段１８が順変換器１２を継続運転させて逆変換器１
５を経て直流リンクコンデンサ１３に流入する事故電流
を母線９へ回生することにより、直流リンクコンデンサ
電圧Ｖｃの上昇を抑制することができる。As described above, in this embodiment, the main circuit voltage detecting means 16 detects the bus bar voltage at the time of a short circuit accident or a ground fault of the power transmission line 8 or the like, and the bus bar voltage reaches a predetermined voltage value. If the determination unit 17 determines that the reverse converter 1 is operated, the converter control unit 18 continuously operates the forward converter 12 to operate the reverse converter 1.
By regenerating the fault current flowing into the DC link capacitor 13 via 5 to the bus bar 9, the rise of the DC link capacitor voltage Vc can be suppressed.
【００２１】従って、直流リンクコンデンサ電圧Ｖｃを
ほぼ一定に制御できるので、変換装置の再起動時に、よ
り安定な可変速揚水発電設備の運転を行うことができ
る。また、事故除去後において、再起動を行う場合には
順変換器１２が継続運転されているので、逆変換器のみ
の運転でよく、設備の無用な停止および再起動を回避す
ることができるTherefore, since the DC link capacitor voltage Vc can be controlled to be substantially constant, more stable operation of the variable speed pumped storage power generation facility can be performed when the converter is restarted. Further, since the forward converter 12 is continuously operated when restarting after the accident elimination, only the reverse converter needs to be operated, and unnecessary stoppage and restart of the equipment can be avoided.
【００２２】なお、本実施例では、主回路電圧検出手段
１６は主変圧器６の低圧側にある母線９の電圧を検出し
たが、主変圧器６の高圧側の電圧を検出しても同様に実
施できる。その他、本発明はその要旨を逸脱しない範囲
で種々変形して実施できる。In the present embodiment, the main circuit voltage detecting means 16 detects the voltage of the bus bar 9 on the low voltage side of the main transformer 6, but the same can be said even if the voltage on the high voltage side of the main transformer 6 is detected. Can be carried out. Besides, the present invention can be variously modified and implemented without departing from the scope of the invention.
【００２３】[0023]
【発明の効果】以上述べたように本発明によれば、系統
の事故時の主回路電圧を主回路電圧検出手段により検出
し、この主回路電圧が所定の電圧に達しているときには
順変換器を継続運転して直流リンクコンデンサに流入す
る事故電流を主回路へ回生し、直流リンクコンデンサの
電圧を一定になるように制御するので、事故除去時にお
ける変換装置の再起動を、より安定に行うことができる
可変速揚水発電設備の運転方法およびその装置を提供で
きる。As described above, according to the present invention, the main circuit voltage at the time of a system fault is detected by the main circuit voltage detecting means, and when this main circuit voltage reaches a predetermined voltage, the forward converter. Is continuously operated to regenerate the fault current flowing into the DC link capacitor to the main circuit and control it so that the voltage of the DC link capacitor is constant, so the converter can be restarted more stably when the fault is removed. It is possible to provide a variable speed pumped storage power generation facility operation method and an apparatus thereof.
【図１】本発明に係る可変速揚水発電設備の一実施例を
示す図。FIG. 1 is a diagram showing an embodiment of a variable speed pumped storage power generation facility according to the present invention.
【図２】本発明に係る可変速揚水発電設備の運転装置の
一実施例を示す図。FIG. 2 is a diagram showing an embodiment of an operating device of a variable speed pumped storage power generation facility according to the present invention.
【図３】本発明に係る可変速揚水発電設備の運転を説明
するフロ−チャ−ト。FIG. 3 is a flowchart for explaining the operation of the variable speed pumped storage power plant according to the present invention.
【図４】従来の可変速揚水発電設備の構成を示す図。FIG. 4 is a diagram showing a configuration of a conventional variable speed pumped storage power generation facility.
１…ポンプ水車、２…発電電動機、２ａ…巻線形回転
子、２ｂ…固定子、３…並列用遮断器、４…発電運転用
断路器、５…揚水運転用断路器、６…主変圧器、７…送
電線遮断器、８…送電線、９…母線、１０…電源遮断
器、１１…電源変圧器、１２…順変換器、１３…直流リ
ンクコンデンサ、１４…チョッパ、１５…逆変換器、１
６…主回路電圧検出手段、１７…判定手段、１７ａ…第
１の判定部、１７ｂ…第２の判定部、１８…変換器制御
手段。DESCRIPTION OF SYMBOLS 1 ... Pump turbine, 2 ... Generator motor, 2a ... Winding rotor, 2b ... Stator, 3 ... Parallel circuit breaker, 4 ... Power generation operation disconnector, 5 ... Pumping operation disconnector, 6 ... Main transformer , 7 ... Transmission line breaker, 8 ... Transmission line, 9 ... Bus line, 10 ... Power breaker, 11 ... Power transformer, 12 ... Forward converter, 13 ... DC link capacitor, 14 ... Chopper, 15 ... Inverse converter 1
6 ... Main circuit voltage detection means, 17 ... Judgment means, 17a ... 1st judgment part, 17b ... 2nd judgment part, 18 ... Converter control means.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０２Ｐ 7/635 Ｂ 8209−5Ｈ (72)発明者 阿部 充幸 東京都千代田区内幸町一丁目１番３号 東 京電力株式会社内 (72)発明者 金子 寛和 東京都千代田区内幸町一丁目１番３号 東 京電力株式会社内 (72)発明者 菅原 良二 東京都中央区銀座６丁目15番１号 電源開 発株式会社内 (72)発明者 佐野 孝義 東京都中央区銀座６丁目15番１号 電源開 発株式会社内 (72)発明者 蜂屋 一雄 東京都中央区銀座６丁目15番１号 電源開 発株式会社内 (72)発明者 古野 郁夫 東京都府中市東芝町１番地 株式会社東芝 府中工場内 (72)発明者 工藤 健司 東京都港区芝浦一丁目１番１号 株式会社 東芝本社事務所内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification number Internal reference number for FI Technical indication H02P 7/635 B 8209-5H (72) Inventor Mitsuyuki Abe 1-1-1 Uchiyuki-cho, Chiyoda-ku, Tokyo No. 3 In Tokyo Electric Power Company (72) Inventor Hirokazu Kaneko 1-3-1, Uchisaiwaicho, Chiyoda-ku, Tokyo Within Tokyo Electric Power Co., Inc. (72) Ryoji Sugawara 6-15-1, Ginza, Chuo-ku, Tokyo Power supply development Co., Ltd. (72) Inventor Takayoshi Sano 6-151-1 Ginza, Chuo-ku, Tokyo Power development Co., Ltd. (72) Inventor Kazuo Hachiya 6-15-1, Ginza, Chuo-ku, Tokyo Power supply opening (72) Inventor Ikuo Furuno 1 Toshiba-cho, Fuchu-shi, Tokyo Inside the Fuchu factory, Toshiba Corp. (72) Inventor Kenji Kudo 1-1-1, Shibaura, Minato-ku, Tokyo Stocks Company Toshiba headquarters in an office
Claims (2)
有する発電電動機と、交流入力を直流に変換する順変換
器、この順変換器より出力される直流を一定電圧に維持
する直流リンクコンデンサおよび前記順変換器より出力
される直流を交流に変換して前記発電電動機の回転子を
励磁する逆変換器からなる変換装置を備え、かつ前記発
電電動機の固定子を主回路を介して系統に接続してなる
可変速揚水発電設備において、 前記主回路の電圧を検出する主回路電圧検出手段を設
け、 可変速揚水発電設備の運転中に、 前記主回路電圧検出手段により検出された系統事故時の
主回路電圧が所定の電圧に達しているときには前記逆変
換器の運転を停止するとともに前記順変換器を継続運転
して前記直流リンクコンデンサの電圧を一定に制御し、 前記主回路電圧が所定電圧に達していないときには前記
逆変換器および前記順変換器を停止させることを特徴と
する可変速揚水発電設備の運転方法。1. A generator-motor having a wound rotor connected to a pump turbine, a forward converter for converting an AC input into a direct current, and a DC link capacitor for maintaining a DC voltage output from the forward converter at a constant voltage. And a converter comprising an inverse converter that excites the rotor of the generator motor by converting the direct current output from the forward converter into alternating current, and the stator of the generator motor is connected to the system via the main circuit. In a connected variable speed pumped storage power generation facility, provided with main circuit voltage detection means for detecting the voltage of the main circuit, and during operation of the variable speed pumped storage power generation facility, during a system fault detected by the main circuit voltage detection means. When the main circuit voltage of has reached a predetermined voltage, the operation of the inverse converter is stopped and the forward converter is continuously operated to control the voltage of the DC link capacitor to be constant, The method of operating a variable speed pumped storage power plant, characterized in that stops the inverter and the forward converter when the circuit voltage does not reach the predetermined voltage.
有する発電電動機と、交流入力を直流に変換する順変換
器、この順変換器より出力される直流を一定電圧に維持
する直流リンクコンデンサおよび前記順変換器より出力
される直流を交流に変換して前記発電電動機の回転子を
励磁する逆変換器からなる変換装置を備え、かつ前記発
電電動機の固定子を主回路を介して系統に接続してなる
可変速揚水発電設備において、 可変速揚水発電設備の運転中に前記主回路の電圧を検出
する電圧検出手段と、 この電圧検出手段により検出された系統事故時の主回路
電圧が所定の電圧に達しているか否かを判定する判定手
段と、 前記主回路電圧が所定の電圧に達しているときには前記
逆変換器の運転を停止するとともに前記順変換器を継続
運転して前記直流リンクコンデンサの電圧を一定に制御
し、前記主回路電圧が所定電圧に達していないときには
前記逆変換器および前記順変換器を停止させる変換器制
御手段とを備えることを特徴とする可変速揚水発電設備
の運転装置。2. A generator motor having a wound rotor connected to a pump turbine, a forward converter for converting an AC input into a DC, and a DC link capacitor for maintaining a DC output from the forward converter at a constant voltage. And a converter comprising an inverse converter that excites the rotor of the generator motor by converting the direct current output from the forward converter into alternating current, and the stator of the generator motor is connected to the system via the main circuit. In the connected variable speed pumped storage power generation equipment, the voltage detection means for detecting the voltage of the main circuit during operation of the variable speed pumped storage power generation equipment, and the main circuit voltage at the time of a system fault detected by the voltage detection means are predetermined. Determination means for determining whether or not the voltage has been reached, and when the main circuit voltage has reached a predetermined voltage, the operation of the reverse converter is stopped and the forward converter is continuously operated and Variable speed pumping, characterized in that it comprises: converter control means for controlling the voltage of the DC link capacitor to a constant value and stopping the inverse converter and the forward converter when the main circuit voltage does not reach a predetermined voltage. Operation equipment for power generation equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4070801A JP3061927B2 (en) | 1992-03-27 | 1992-03-27 | Method and apparatus for operating variable speed pumped storage power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4070801A JP3061927B2 (en) | 1992-03-27 | 1992-03-27 | Method and apparatus for operating variable speed pumped storage power plant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05284794A true JPH05284794A (en) | 1993-10-29 |
| JP3061927B2 JP3061927B2 (en) | 2000-07-10 |
Family
ID=13442019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4070801A Expired - Fee Related JP3061927B2 (en) | 1992-03-27 | 1992-03-27 | Method and apparatus for operating variable speed pumped storage power plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3061927B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100646685B1 (en) * | 2005-10-26 | 2006-11-23 | 한국전력공사 | Power System Stabilizer Using Super Capacitor |
| CN101320953A (en) * | 2007-06-05 | 2008-12-10 | 株式会社日立制作所 | Wind power generation system and its control method |
| JP2009189189A (en) * | 2008-02-08 | 2009-08-20 | Hitachi Ltd | Wind power generation system |
| JP2009273281A (en) * | 2008-05-09 | 2009-11-19 | Hitachi Ltd | Wind power generation system |
| CN115473445A (en) * | 2022-09-28 | 2022-12-13 | 广东电网有限责任公司 | A hybrid AC exchanger |
-
1992
- 1992-03-27 JP JP4070801A patent/JP3061927B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100646685B1 (en) * | 2005-10-26 | 2006-11-23 | 한국전력공사 | Power System Stabilizer Using Super Capacitor |
| CN101320953A (en) * | 2007-06-05 | 2008-12-10 | 株式会社日立制作所 | Wind power generation system and its control method |
| JP2009189189A (en) * | 2008-02-08 | 2009-08-20 | Hitachi Ltd | Wind power generation system |
| JP2009273281A (en) * | 2008-05-09 | 2009-11-19 | Hitachi Ltd | Wind power generation system |
| US8097971B2 (en) | 2008-05-09 | 2012-01-17 | Hitachi, Ltd. | Wind turbine generator system |
| CN115473445A (en) * | 2022-09-28 | 2022-12-13 | 广东电网有限责任公司 | A hybrid AC exchanger |
| CN115473445B (en) * | 2022-09-28 | 2026-03-27 | 广东电网有限责任公司 | A hybrid AC converter |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3061927B2 (en) | 2000-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1669212A (en) | Operation method of wind power generation equipment and its operation method | |
| JP4143267B2 (en) | Vehicle power supply device | |
| JP3043707B2 (en) | Pumped storage generator | |
| JP3061927B2 (en) | Method and apparatus for operating variable speed pumped storage power plant | |
| CN112953191A (en) | Motor rotor energy release circuit for frequency converter | |
| US5532568A (en) | Method for braking an alternating-current motor | |
| JP2009204255A (en) | Water supply device for steam generator | |
| JP6993596B2 (en) | Drive | |
| JPH10243675A (en) | Motor stop circuit | |
| JP2980469B2 (en) | Inverter device | |
| CN119298319A (en) | A system and method for recovering and using shutdown energy of a large-scale Francis turbine | |
| JP2020145815A (en) | Shaft drive power generator | |
| CN215268058U (en) | Motor rotor energy release circuit for frequency converter | |
| JP3286049B2 (en) | Variable speed power generation system | |
| CN114079280B (en) | Power supply device and ship with same | |
| JP2906636B2 (en) | Inverter control device for induction motor | |
| CN115441803A (en) | Power failure control method and device for magnetic suspension compressor and magnetic suspension compressor unit | |
| JPH05168297A (en) | How to operate the variable speed pumped storage power plant | |
| JP3466784B2 (en) | Power generator | |
| JP3435871B2 (en) | Inverter control method at momentary power failure | |
| JPH1032998A (en) | Operation method of variable speed flywheel power generation equipment | |
| JPH07245872A (en) | Variable speed generator motor | |
| JPH06335295A (en) | Variable speed generator motor control method and apparatus | |
| JP3499078B2 (en) | Control and protection equipment for variable speed pumped storage power plants. | |
| CN111244934B (en) | Ship DC network power supply system with brake energy storage device and brake energy optimization method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080428 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090428 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100428 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100428 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110428 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |