JPH07107795A - Apparatus and method for excitation control for synchronous machine - Google Patents
Apparatus and method for excitation control for synchronous machineInfo
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- JPH07107795A JPH07107795A JP5245415A JP24541593A JPH07107795A JP H07107795 A JPH07107795 A JP H07107795A JP 5245415 A JP5245415 A JP 5245415A JP 24541593 A JP24541593 A JP 24541593A JP H07107795 A JPH07107795 A JP H07107795A
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- excitation
- synchronous machine
- control device
- output
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、同期機用励磁制御装置
及び制御方法に係り、特に常用系、待機系から成る励磁
制限制御装置を備えた同期機用励磁制御装置及び制御方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synchronous machine excitation control device and control method, and more particularly to a synchronous machine excitation control device and control method provided with an excitation limit control device comprising a normal system and a standby system.
【０００２】[0002]
【従来の技術】従来の常用系、待機系からなる２重系の
同期機用励磁制御装置は、常用、待機系の励磁制御部と
も励磁制限制御装置の設定器を同一の動作値に設定して
いた。なお、この種の２重系の同期機用励磁制御装置と
しては、例えば特開昭５９−２２２１００号公報には、
同一機能、特性を有する常用側、待機側の２組の自動電
圧調整装置において、電気回路的に独立した２組の設定
信号を発生する１個の電圧設定器を設け、各々の設定信
号を常用、待機側に与え、この２組の自動電圧調整装置
の制御信号の比較回路を設けて、自動電圧調整装置の異
常を検出できるものが記載されている。また特開平３−
２４５８００号公報には、励磁制御装置を少なくとも３
系統設け、制御性及び信頼性を高めるようにした多重化
励磁制御装置について記載されている。2. Description of the Related Art A conventional dual-system synchronous machine excitation control device consisting of a normal system and a standby system sets the setters of the excitation limit control device to the same operating value in both the regular and standby system excitation control units. Was there. An example of this type of dual-system synchronous machine excitation controller is disclosed in Japanese Patent Laid-Open No. 59-222100.
In the two sets of automatic voltage regulators, the normal side and the standby side, which have the same function and characteristics, are provided with one voltage setter that generates two sets of setting signals independent from each other in terms of electric circuit, and each set signal is normally used. It is described that an abnormality of the automatic voltage regulator can be detected by providing a comparison circuit for the control signals of the two sets of automatic voltage regulators to the standby side. Also, Japanese Patent Laid-Open No. 3-
Japanese Patent No. 245800 discloses at least three excitation control devices.
This document describes a multiplex excitation control device that is provided with a system and has improved controllability and reliability.
【０００３】[0003]
【発明が解決しようとする課題】上記従来技術は、常用
系、待機系の２重系の同期機用励磁制御装置において、
待機系及び常用系の励磁制限制御装置の動作設定値を同
一値としていると、同期機出力の信号検出回路またはゲ
イン回路などの微小な誤差が原因で待機系の励磁制限制
御装置が先に動作してしまう可能性があり、その時には
常用系の励磁制御装置で同期機の励磁制御を行っている
のであるから、待機系の励磁制限制御装置から励磁制限
出力しても同期機出力は変化しないため、常用系の励磁
制限制御装置が遅れて動作開始するまでの間に待機系の
励磁制限制御装置の出力が過大になってしまい、ひいて
は常用系、待機系の励磁制御装置の出力偏差により診断
を行う際に異常と誤診断して待機系の励磁制御装置が除
外されるという不具合いが生じうる問題があった。SUMMARY OF THE INVENTION The above-mentioned prior art is a conventional system and a standby system for a dual system excitation control device for a synchronous machine.
If the operation setting values of the standby system and normal system excitation limit control devices are the same, the standby system excitation limit control device operates first due to a minute error in the signal detection circuit or gain circuit of the synchronous machine output. Since the excitation control device of the normal system is controlling the excitation of the synchronous machine at that time, the output of the synchronous machine does not change even if the excitation control output of the standby system excitation control device is limited. Therefore, the output of the standby system excitation limit control device becomes excessively large until the normal system excitation limit control device starts operating with a delay, which in turn causes a diagnosis by the output deviation of the regular system and standby system excitation control devices. However, there is a problem that a fault may occur in which a standby system excitation control device is excluded by erroneously diagnosing an abnormality when performing.
【０００４】本発明の目的は、上記従来技術の問題点を
解決し、従来例、待機系から成る同期機用励磁制御装置
において、常に常用系の励磁制限制御装置を待機系の励
磁制限制御装置より先に動作させて、出力偏差発生によ
る誤診断をなくした同期機用励磁制御装置及び制御方法
を提供することにある。An object of the present invention is to solve the above-mentioned problems of the prior art, and in a conventional example, in a synchronous machine excitation control device comprising a standby system, the normal system excitation limit control device is always the standby system excitation limit control device. An object of the present invention is to provide an excitation control device for a synchronous machine and a control method that are operated earlier to eliminate erroneous diagnosis due to output deviation.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、本発明の同期機用励磁制御装置は、常用系、待機系
から成る同期機用励磁制御装置において、常用系の励磁
制限制御装置を常に待機系の励磁制限制御装置より先に
動作させるように、待機系の励磁制限制御装置に信号補
正回路を設けるようにしたものである。In order to achieve the above object, a synchronous machine excitation control device of the present invention is a synchronous machine excitation control device comprising a normal system and a standby system. A signal correction circuit is provided in the standby-system excitation limit control device so that the device always operates before the standby-system excitation limit control device.
【０００６】また上記同期機用励磁制御装置において、
待機系の励磁制限制御装置の出力を常用系の励磁制限制
御装置の出力と等しくなるように、待機系の励磁制限制
御装置に追従制御をかける自動追従回路を設けるように
したものである。In the excitation controller for the synchronous machine,
An automatic follow-up circuit is provided for performing follow-up control on the standby system excitation limit control device so that the output of the standby system excitation limit control device becomes equal to the output of the normal system excitation limit control device.
【０００７】さらに上記の同期機用励磁制御装置におい
て、常用系の励磁制限制御装置の故障時に待機系の励磁
制限制御装置に過大な補正がかからないように、上記自
動追従回路の出力にリミッタ回路を設けるようにしたも
のである。Further, in the above excitation control device for a synchronous machine, a limiter circuit is provided at the output of the automatic tracking circuit so that the standby system excitation limit control device is not excessively corrected when the normal system excitation limit control device fails. It is provided.
【０００８】[0008]
【作用】上記の同期機用励磁制御装置は、待機系の励磁
制限制御装置のフィードバック信号の出力に信号補正回
路の補正値を与える機能によって、常用系の励磁制限制
御装置のフィードバック信号の出力よりも不動作側にバ
イアス偏差を持たせた状態にすることができるので、常
用系の励磁制限制御装置を常に待機系の励磁制限制御装
置より先に動作させるようにできるから、待機系の励磁
制限制御装置が先行動作して常用／待機系間の過大編差
信号を出力して待機系の励磁制御部を異常と誤診断する
ことが防止される。The above excitation control device for a synchronous machine has a function of giving the correction value of the signal correction circuit to the output of the feedback signal of the standby-system excitation limit control device, and thus the output of the feedback signal of the normal-system excitation limit control device. Since it is possible to put the bias deviation on the non-operating side, it is possible to always operate the excitation limit control device for the normal system before the excitation limit control device for the standby system. It is prevented that the control device operates in advance and outputs an excessive difference signal between the normal / standby system to erroneously diagnose the excitation control unit of the standby system as abnormal.
【０００９】また上記の待機系の励磁制限制御装置の出
力が常用系の励磁制限制御装置の出力と等しくなるよう
に自動追従回路で追従制御をかけることにより、待機系
の信号補正回路で偏差を持たせた励磁制限制御装置の出
力を常に常用系の励磁制限制御装置の出力に追従してい
るように修正することができるから、これにより常用、
待機系の励磁制限制御装置の出力を常に一致させること
ができるので、常用／待機系切換時の電圧変動が極めて
小さな値とすることができる。Further, by performing the follow-up control by the automatic follow-up circuit so that the output of the standby-system excitation limit control device becomes equal to the output of the normal-system excitation-limit control device, the deviation is caused in the standby-system signal correction circuit. Since it is possible to modify the output of the provided excitation limit control device so that it always follows the output of the excitation limit control device of the normal system,
Since the outputs of the standby-system excitation limit control device can always be made to coincide with each other, the voltage fluctuation at the time of switching the normal / standby system can be made a very small value.
【００１０】さらに上記の自動追従回路の出力にリミッ
タ回路を設けることにより、常用系の励磁制御部が故障
して異常となった時にも、待機系の励磁制限制御装置に
信号補正回路が過大な補正をかけるのを防止することが
できる。Further, by providing a limiter circuit at the output of the above-mentioned automatic follow-up circuit, even if the excitation control section of the normal system fails and becomes abnormal, the signal correction circuit is excessive in the excitation limit control device of the standby system. It is possible to prevent correction.
【００１１】[0011]
【実施例】以下、本発明の実施例を図１から図５により
説明する。図１は本発明の同期機用励磁制御装置の第１
実施例を示す構成図である。図１において、サイリスタ
を用いた、２重系の励磁制御装置を備える、同期発電機
端子電圧制御系の全体構成を示し、１は同期発電機（Ｇ
ＥＮ）、２は励磁用電圧変成器（ＥＸ−ＴＲ）、３Ａ、
３Ｂは計器用電圧変成器（ＰＴ）、４Ａ、４Ｂは計器用
電流変成器（ＣＴ）、５は界磁しゃ断器（ＦＳ）、６、
７はＡ系、Ｂ系同期機端子電圧信号検出及び制限回路、
８Ａ、８ＢはＡ系、Ｂ系ゲートパルス発生器（ＧＰ
Ｇ）、９は切換スイッチ、１０はサイリスタ整流装置
（ＴＨＹ）、１１、１２はＡ系、Ｂ系励磁制御部、１３
は発電機界磁巻線である。１４、１５は減算器、１６、
１７は低励磁制限制御装置（ＵＥＬ）、１８、１９は加
算器、図２と同じく、２１Ａ、２２Ｂは電圧設定器（９
０Ｒ）、２２Ａ、２２ＢはＡ系、Ｂ系自動電圧調整装置
（ＡＶＲ）、２３Ａ、２３ＢはＡ系、Ｂ系低励磁制限制
御装置動作値設定器である。なお過励磁制限制御装置
（ＯＥＬ）は図示していない。以下、各図面を通じて同
一符号または記号は同一または相当部分を示すものとす
る。Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 shows a first embodiment of an excitation control device for a synchronous machine according to the present invention.
It is a block diagram which shows an Example. In FIG. 1, an overall configuration of a synchronous generator terminal voltage control system including a dual system excitation control device using a thyristor is shown, and 1 is a synchronous generator (G
EN), 2 is a voltage transformer for excitation (EX-TR), 3A,
3B is an instrument voltage transformer (PT), 4A, 4B is an instrument current transformer (CT), 5 is a field breaker (FS), 6,
7 is an A system, B system synchronous machine terminal voltage signal detection and limiting circuit,
8A and 8B are A system and B system gate pulse generators (GP
G), 9 is a changeover switch, 10 is a thyristor rectifier (THY), 11 and 12 are A-system and B-system excitation control units, 13
Is the generator field winding. 14, 15 are subtractors, 16,
Reference numeral 17 is a low excitation limit control device (UEL), 18 and 19 are adders, and 21A and 22B are voltage setters (9
0R), 22A and 22B are A system and B system automatic voltage regulators (AVR), and 23A and 23B are A system and B system low excitation limit control device operating value setters. The overexcitation limit controller (OEL) is not shown. Hereinafter, the same reference numerals or symbols throughout the drawings indicate the same or corresponding portions.
【００１２】上記構成で、常用系（Ａ系）励磁制御部１
１の信号検出及び制限回路６で、計器用電圧変成器３Ａ
で検出した同期機端子電圧Ｖgを電圧設定器２１Ａの電
圧設定値と減算器１４で減算し、この偏差信号値に応じ
た自動電圧調整装置２２Ａの出力と計器用電流変成器４
Ａで検出した同期機無効電力Ｑ及び低励磁制限制御装置
動作値設定器２３Ａの設定値に応じた低励磁制限制御装
置１６の出力とを加算器１８で加算し、この加算信号に
応じたゲートパルス発生器（ＧＰＧ）８Ａの切換スイッ
チ９を介してサイリスタ整流装置１０のサイリスタ点弧
角を制御し、この出力を界磁しゃ断器５を介して同期機
界磁巻線１３に供給することにより、同期機１の端子電
圧を一定に制御する。なお本実施例では図５の発電機出
力限界曲線における発電機出力制限曲線の低励磁制限制
御装置による例について説明するが、過励磁制限制御装
置の場合も同様である。With the above structure, the normal system (A system) excitation controller 1
In the signal detecting and limiting circuit 6 of FIG.
The synchronous machine terminal voltage V g detected in step 1 is subtracted by the voltage set value of the voltage setter 21A and the subtractor 14, and the output of the automatic voltage regulator 22A and the instrument current transformer 4 according to the deviation signal value.
The synchronous machine reactive power Q detected at A and the output of the low excitation limit control device 16 according to the set value of the low excitation limit control device operation value setting device 23A are added by the adder 18, and the gate corresponding to this addition signal is added. By controlling the thyristor firing angle of the thyristor rectifier 10 via the changeover switch 9 of the pulse generator (GPG) 8A and supplying this output to the synchronous machine field winding 13 via the field breaker 5. , The terminal voltage of the synchronous machine 1 is controlled to be constant. In this embodiment, an example of the generator output limit curve in the generator output limit curve of FIG. 5 by the low excitation limit control device will be described, but the same applies to the overexcitation limit control device.
【００１３】図２は図１のＡ系、Ｂ系励磁制御部１１、
１２の信号検出及び制限回路６、７の詳細構成図であ
る。図２において、図１と同一符号は相当部分を示して
いるほか、２４Ａ、２４Ｂは信号補正回路（ΔＱref）
２５Ａ、２５Ｂは常用、待機選択回路、２６Ａ、２６Ｂ
は加算器（ＵＥＬ′REF）、２７Ａ、２７Ｂは減算器、
２８Ａ、２８Ｂは低励磁制限器（−ＫUEL）である。FIG. 2 shows the A-system and B-system excitation controller 11 of FIG.
12 is a detailed configuration diagram of signal detection and limitation circuits 6 and 7 of FIG. In FIG. 2, the same reference numerals as those in FIG. 1 indicate corresponding parts, and 24A and 24B are signal correction circuits (ΔQ ref )
25A and 25B are regular and standby selection circuits, 26A and 26B
Is an adder (UEL ' REF ), 27A and 27B are subtractors,
28A and 28B are low excitation limiters ( -KUEL ).
【００１４】上記構成で、まず常用系としてＡ系励磁制
御部１１（図１）が選択され、且つ励磁制限制御装置と
して低励磁制限制御装置１６が働いていない状態では、
信号検出及び制限回路６の電圧設定器２１Ａで与えられ
た電圧設定値と計器用電圧変成器３Ａ（図１）で検出し
た同期機端子電圧Ｖgとの減算器１４を介した偏差信号
により、自動電圧調整装置（ＡＶＲ）２２Ａの加算器１
８を介した出力ＡOUTは上記同期機端子電圧Ｖg上記電圧
設定値と一致するようにゲートパルス発生器８Ａ（図
１）を制御する。また同期機１の運転点が進相側（低励
磁側）になると、Ａ系低励磁制限制御装置１６が動作し
て、低励磁制限制御装置動作値設定器２３Ａで与えられ
た動作設定値ＵＥＬREFと計器用電流変成器４Ａ（図
１）で検出した同期機無効電力Ｑとの低励磁制限制御装
置１６の減算器２７Ａを介した偏差信号入力により、低
励磁制限制御装置１６の低励磁制限器２８の出力は上記
自動電圧調整装置２２Ａの出力と加算器１８を介して加
算され、この加算された出力ＡOUTは同期機１の運転点
が低励磁制限装置１６の動作設定値ＵＥＬREF（図５）
で決められた点以下にならないように、ゲートパルス発
生器８Ａ（図１）、切換スイッチ９を介してサイリスタ
整流装置１０を制御する。以上が常用系であるＡ系の励
磁制御部１１のみが動作し、待機系であるＢ系の励磁制
限制御部１２が全く動作しなかった場合の２重系の励磁
制限制御部１１、１２の動作である。In the above configuration, first, when the A-system excitation control unit 11 (FIG. 1) is selected as the normal system and the low excitation limit control device 16 is not operating as the excitation limit control device,
By the deviation signal of the voltage setting value given by the voltage setting device 21A of the signal detection and limiting circuit 6 and the synchronous machine terminal voltage V g detected by the voltage transformer 3A for the instrument (FIG. 1) via the subtractor 14, Adder 1 of automatic voltage regulator (AVR) 22A
The output A OUT via 8 controls the gate pulse generator 8A (FIG. 1) so that the synchronous machine terminal voltage V g matches the voltage setting value. When the operating point of the synchronous machine 1 is on the phase advance side (low excitation side), the A system low excitation limit control device 16 operates and the operation set value UEL given by the low excitation limit control device operation value setter 23A. By inputting a deviation signal between REF and the synchronous machine reactive power Q detected by the instrument current transformer 4A (FIG. 1) via the subtractor 27A of the low excitation limit control device 16, the low excitation limit of the low excitation limit control device 16 is reduced. The output of the device 28 is added to the output of the automatic voltage regulator 22A via the adder 18, and the added output A OUT is the operation set value UEL REF (of the low excitation limit device 16 at the operating point of the synchronous machine 1). (Fig. 5)
The thyristor rectifying device 10 is controlled via the gate pulse generator 8A (FIG. 1) and the changeover switch 9 so that the temperature does not fall below the point determined by. In the above case, only the excitation control unit 11 of the A system, which is the normal system, operates, and the excitation limit control unit 12 of the B system, which is the standby system, does not operate at all. It is an action.
【００１５】しかしながら、この場合に待機系としてＢ
系励磁制御装置１２（図１）にも低励磁制限制御装置１
７が付いているので、上記同期機１の運転点が進相側
（低励磁側）になると、Ｂ系低励磁制御装置１７が動作
することになるが、この際下記信号補正回路２４Ｂがな
い場合には、上記Ａ系、Ｂ系低励磁制限制御装置１６、
１７の回路定数の微小な違いにより、この待機系である
Ｂ系低励磁制限制御装置１７が上記Ａ系低励磁制限制御
装置１６の動作よりも先に動作してしまう可能性があ
る。ところがこの場合には、待機系であるＢ系低励磁制
限制御装置１７は切換スイッチ９が開いていて実際に制
御動作をしていないのであるから、Ｂ系低励磁制限制御
装置１７の信号をいかに変えても同期機１の出力は変わ
らない。このためＢ系低励磁制限制御装置１７の出力が
過大となり、Ａ系、Ｂ系信号検出及び制限回路６、７の
出力ＡOUT、ＢOUTの偏差が大きくなるため、この出力Ａ
OUT、ＢOUTの偏差値などにより故障判別回路（図示しな
い）で故障判別する際に、Ｂ系励磁制御部１２を異常と
誤診断してしまうことになる不具合いがある。However, in this case, B is used as a standby system.
The system excitation controller 12 (FIG. 1) also includes the low excitation limit controller 1
7, the B-system low-excitation control device 17 operates when the operating point of the synchronous machine 1 is on the advance side (low-excitation side), but at this time, the following signal correction circuit 24B is not provided. In this case, the A-system and B-system low excitation limit control device 16,
There is a possibility that the B system low excitation limit control device 17, which is the standby system, may operate earlier than the operation of the A system low excitation limit control device 16 due to a minute difference in the circuit constants of 17. However, in this case, the B-system low excitation limit control device 17, which is a standby system, does not actually perform the control operation because the changeover switch 9 is open. Even if changed, the output of the synchronous machine 1 does not change. For this reason, the output of the B system low excitation limit control device 17 becomes excessively large, and the deviation of the outputs A OUT and B OUT of the A system and B system signal detection and limiting circuits 6 and 7 becomes large.
When a failure determination circuit (not shown) determines a failure based on the deviation value of OUT , B OUT , etc., there is a problem that the B system excitation control unit 12 is erroneously diagnosed as abnormal.
【００１６】そこで上記不具合いを防止するため、Ａ
系、Ｂ系低励磁制限制御装置１６、１７に信号補正回路
（ΔＱref）２４Ａ、２４Ｂ及び常用／待機選択回路２
５Ａ、２５Ｂが付加されており、この場合に常用系とし
てＡ系が使用されていて、Ｂ系が待機系となっているの
で、常用系としてのＡ系の常用／待機選択回路２５Ａは
開いており、待機系としてのＢ系の信号補正回路２４Ｂ
はＢ系の常用／待機選択回路２５Ｂを閉じて生かす。こ
の状態で、Ｂ系信号補正回路２４Ｂは低励磁制限制御装
置１７の低励磁制限値設定器２３Ｂの低励磁制限設定値
ＵＥＬREFが不動作側に移動するように決めるべく、上
記設定器２３Ｂの低励磁制限設定値ＵＥＬREFと信号補
正回路２４Ｂの補正値ΔＱrefをＢ系待機（Ａ系常用）
の常用／待機選択回路２５Ｂを閉じて加算器２６Ｂによ
り加算し、この加算した補正低励磁制限設定値ＵＥＬ′
REFと同期機無効電力Ｑとを減算器２７Ｂにより減算
し、この偏差信号を低励磁制限器（−ＫUEL）２８Ｂに
入力して、この低励磁制限器２８Ｂの出力を上記自動電
圧調整装置２２Ａの出力と加算器１９により加算し、こ
の加算出力ＡOUTをゲートパルス発生器８ｂ（図１）に
与える。以上のようにして、待機系のＢ系励磁制御部１
２の低励磁制限制御装置１６の信号補正回路２４は低励
磁制限設定値ＵＥＬREFが補正値ΔＱrefだけ低励磁側
（不動作側）の補正低励磁制限設定値ＵＥＬ′REFに図
５に示すように移動させるので、従って同期機１の動作
点が進相側（低励磁側）にくると非補正低励磁制限設定
値ＵＥＬREFの常用系のＡ系励磁制限制御装置１６が先
に動作し、次に待機系のＢ系低励磁制限制御装置１７が
動作する。ここで実際に同期機１を制御しているのは常
用系のＡ系励磁制御部１１であるから、そのＡ系低励磁
制限制御装置１６の低励磁制限器２８Ａ出力により同期
機無効電力Ｑが先行制御されてしまうので、上記待機系
のＢ系低励磁制限制御装置１７が動作せずに低励磁制限
器２８Ｂ出力が零となっても、Ａ系、Ｂ系信号検出及び
制限回路６、７のＡOUT、ＢOUTの差はそれほど大きな値
にならないため、この出力ＡOUT、ＢOUTの偏差により故
障判別する際に待機系、常用系のＢ系、Ａ系励磁制御部
１２、１１を故障と誤診断することはない。Therefore, in order to prevent the above-mentioned problems, A
System, B system low excitation limit control devices 16 and 17, and signal correction circuits (ΔQ ref ) 24A and 24B and normal / standby selection circuit 2
5A and 25B are added. In this case, since the A system is used as the regular system and the B system is the standby system, the regular / standby selection circuit 25A of the A system as the regular system is opened. And a B-system signal correction circuit 24B as a standby system
Closes the normal / standby selection circuit 25B of the B system and makes the most of it. In this state, the B system signal correction circuit 24B determines the low excitation limit value setter 23B of the low excitation limit controller 17 so that the low excitation limit set value UEL REF moves to the non-operation side. The low excitation limit set value UEL REF and the correction value ΔQ ref of the signal correction circuit 24B are set to the B system standby (A system regular use)
The normal / standby selection circuit 25B is closed and added by the adder 26B, and the added correction low excitation limit set value UEL 'is added.
REF and the synchronous machine reactive power Q are subtracted by the subtractor 27B, the deviation signal is input to the low excitation limiter ( -KUEL ) 28B, and the output of the low excitation limiter 28B is input to the automatic voltage regulator 22A. And the adder 19 add the output and the added output A OUT is given to the gate pulse generator 8b (FIG. 1). As described above, the B-system excitation control unit 1 of the standby system
Signal correction circuit 24 of the second low excitation limit controller 16 shown in FIG. 5 to correct the low excitation limit setting UEL 'REF low excitation limit setting UEL REF correction value Delta] Q ref only low excitation side (non-operating side) Therefore, when the operating point of the synchronous machine 1 comes to the advance side (low excitation side), the A-system excitation limitation control device 16 of the normal system with the uncorrected low excitation limit set value UEL REF operates first. Next, the B system low excitation limit control device 17 of the standby system operates. Here, since the synchronous system 1 is actually controlled by the A system excitation control unit 11 of the normal system, the synchronous machine reactive power Q is output by the low excitation limiter 28A output of the A system low excitation limit control device 16. Since the preceding control is performed, even if the output of the low excitation limiter 28B becomes zero without the B system low excitation limit control device 17 of the standby system operating, the A system and B system signal detection and limiting circuits 6 and 7 are generated. Since the difference between A OUT and B OUT does not become so large, the standby system, the normal system B system, and the A system excitation control units 12 and 11 fail when the failure determination is made based on the deviation between the outputs A OUT and B OUT. There is no false diagnosis.
【００１７】つぎに、常用系としてＢ系励磁制御部１２
（図１）を用いる場合には、図２の待機系、常用系とし
てのＡ系、Ｂ系低励磁制限制御装置１６、１７で、Ａ系
待機（Ｂ系常用）の常用／待機選択回路２５Ａが閉じ
て、Ｂ系待機（Ａ系常用）の常用／待機選択回路２５Ｂ
が開となり、低励磁制限値設定器２３Ａの低励磁制限設
定値ＵＥＬREFは信号補正回路２４Ａの補正値ΔＱrefを
加算器２５Ａで加算されて補正低励磁制限設定値ＵＥ
Ｌ′REFとなり、低励磁制限設定器２３Ｂの非補正低励
磁制限設定値ＵＥＬREFよりも不動作側に移動するの
で、常用系のＢ系低励磁制限制御装置１７が先に動作
し、次に待機系のＡ系低励磁制限制御装置１６が動作す
る。ここで実際に同期機１を制御しているのは常用系の
Ｂ系励磁制御部１２であるから、そのＢ系低励磁制限制
御装置１７の低励磁制限器２８Ｂ出力により同期機無効
電力Ｑが先行制御されるので、上記待機系のＡ系低励磁
制限制御装置１６が動作せずに低励磁制限器２８Ａ出力
が零となっても、Ａ系、Ｂ系信号検出及び制限回路６、
７の出力ＡOUT、ＢOUTの差はそれほど大きな値にならな
いため、この出力ＡOUT、ＢOUTの偏差により故障判別し
ても待機系、常用系のＡ系、Ｂ系励磁制御部１１、１２
を故障と誤診断することはない。Next, the B system excitation control unit 12 as a normal system
When (FIG. 1) is used, the standby / standby selection circuit 25A for standby of A system (normal use of B system) is used in the standby system, the A system and B system low excitation limit control devices 16 and 17 as the normal system. Closed, and the normal / standby selection circuit 25B for B system standby (A system regular use)
Is opened, and the low excitation limit set value UEL REF of the low excitation limit value setter 23A is added with the correction value ΔQ ref of the signal correction circuit 24A by the adder 25A to obtain the corrected low excitation limit set value UE.
It becomes L' REF and moves to the non-operation side from the uncorrected low excitation limit setting value UEL REF of the low excitation limit setting device 23B, so that the B system low excitation limit control device 17 of the normal system operates first, then The standby system A system low excitation limit control device 16 operates. Here, the synchronous machine 1 is actually controlled by the B-system excitation control unit 12 of the normal system, so that the synchronous machine reactive power Q is output by the low-excitation limiter 28B output of the B-system low excitation limit controller 17. Since the preceding control is performed, even if the output of the low excitation limiter 28A becomes zero without the A system low excitation limit control device 16 of the standby system operating, the A system and B system signal detection and limiting circuits 6,
Since the difference between the outputs A OUT and B OUT of 7 does not become so large, even if a failure is determined by the deviation between the outputs A OUT and B OUT , the standby system, the normal system A system, and the B system excitation control units 11 and 12
There is no false diagnosis of failure.
【００１８】以上はＡ系、Ｂ系励磁制御部１１、１２の
Ａ系、Ｂ系低励磁制限制御装置１６、１７の実施例につ
いて説明したが、図示しないＡ系、Ｂ系過励磁制限制御
装置についても同様の構成で同様の動作を行わせること
ができる。またＶ／Ｆ（ボルツ／ヘルツ）制限装置など
の他の制限制御装置でも全く同様である。なお本実施例
では、待機系の励磁制御装置の制限制御装置に信号補正
回路を機能させることで、常用系の制限制御装置を常に
先行動作させるようにしたが、以下の実施例のように待
機系の制限制御装置の信号補正回路の設定値を常用系の
制限制御装置出力に自動追従させるようにしても同様の
機能が得られる。The embodiment of the A-system and B-system low excitation limit control devices 16 and 17 of the A-system and B-system excitation control units 11 and 12 has been described above. The same operation can be performed with respect to the above. The same applies to other limiting control devices such as V / F (bolts / hertz) limiting devices. In this embodiment, the limit control device of the standby system excitation control device is caused to function as a signal correction circuit so that the service system limit control device is always operated in advance. A similar function can be obtained even if the set value of the signal correction circuit of the system limit control device is made to automatically follow the output of the system limit control device.
【００１９】図３は本発明の同期機用励磁制御装置の第
２実施例を示すＡ系、Ｂ系励磁制御部１１、１２の信号
検出及び制限回路６、７の詳細構成図である。図３にお
いて、図２と同一符号は相当部分を示しているほか、４
０は自動追従回路（ＦＬＵＣ：ホロー・アップ・コント
ローラ）であって、この入力はＡ系、Ｂ系低励磁制限制
御装置１６、１７の出力に接続し、この出力は常用／待
機選択回路２５Ａ、２５Ｂに接続する。なおＡ系、Ｂ系
励磁制御装置の構成は図１と同様である。上記構成で、
先の図２と同様に、まず常用系としてＡ系励磁制御部１
１（図１）が選択され、待機系をＢ系励磁制御部１２と
する。ここで図３の自動追従回路４０により、Ａ系、Ｂ
系低励磁制限制御装置１６、１７の出力偏差を求め、こ
の出力偏差があれば該出力偏差が零となるように、Ｂ系
待機（Ａ系常用）の常用／待機選択回路２５Ｂを介して
Ｂ系低励磁制限制御装置１７の信号補正回路２４Ｂの設
定値を常用系のＡ系低励磁制限制御装置１６の出力に自
動追従させ、これによりＡ系、Ｂ系低励磁制限制御装置
１６、１７の出力を常に一致させておくことができる。
従って常用、待機系のＡ系、Ｂ系励磁制御部１１、１２
が正常である限り、Ａ系、Ｂ系低励磁制限制御装置１
６、１７の出力を常に一致させることができ、常用、待
機系のＡ系、Ｂ系励磁制御部１１、１２の信号検出及び
制限回路６、７の出力ＡOUT、ＢOUTの偏差値などにより
故障判別する際に常用、待機系間の出力偏差過大のため
待機系励磁制限制御装置を異常と誤診断することがなく
なる。ただし、本実施例では常用系のＡ系励磁制御部１
１が異常となり、かつその低励磁制限制御装置１７が動
作領域にあると、このＡ系励磁制御部１１の異常信号に
よりＢ系低励磁制限制御装置１７の信号補正回路２４Ｂ
の出力を過大に変化させてしまう可能性があり、このこ
とは次の実施例で解決される。なお本実施例はＡ系、Ｂ
系励磁制御部１１、１２の低励磁制限制御装置１６、１
７について説明したが、過励磁制限制御装置についても
同様である。FIG. 3 is a detailed configuration diagram of the signal detection and limiting circuits 6 and 7 of the A-system and B-system excitation control units 11 and 12 showing a second embodiment of the synchronous machine excitation control device of the present invention. In FIG. 3, the same symbols as those in FIG.
0 is an automatic follow-up circuit (FLUC: hollow up controller), whose input is connected to the outputs of the A-system and B-system low excitation limit control devices 16 and 17, and this output is the normal / standby selection circuit 25A, Connect to 25B. The configuration of the A-system and B-system excitation control devices is the same as in FIG. With the above configuration,
As in the case of FIG. 2 described above, first, the A system excitation control unit 1 is used as the normal system.
1 (FIG. 1) is selected, and the standby system is the B system excitation controller 12. Here, the automatic tracking circuit 40 of FIG.
The output deviation of the system low excitation limit control devices 16 and 17 is calculated, and if there is this output deviation, the B deviation is set to zero via the normal / standby selection circuit 25B of the B system standby (A system normal use). The set value of the signal correction circuit 24B of the system low excitation limit control device 17 is made to automatically follow the output of the A system low excitation limit control device 16 of the regular system, whereby the A system and B system low excitation limit control devices 16 and 17 are set. You can keep the output consistent.
Therefore, the normal and standby A-system and B-system excitation control units 11 and 12
As long as normal, A system, B system low excitation limit control device 1
The outputs of 6 and 17 can always be matched, and the output of the normal and standby A-system and B-system excitation control units 11 and 12 and the output of the limiting circuits 6 and 7 can be adjusted according to the deviation value of A OUT and B OUT. When making a failure determination, the standby system excitation limit control device is not erroneously diagnosed as abnormal due to an excessive output deviation between the regular system and the standby system. However, in this embodiment, the A-system excitation controller 1 of the normal system is used.
If 1 is abnormal and the low excitation limit control device 17 is in the operating region, the signal correction circuit 24B of the B system low excitation limit control device 17 is generated by the abnormal signal of the A system excitation control unit 11.
Can cause the output of the above to change excessively, and this is solved in the next embodiment. In this example, A system, B system
Low excitation limit control devices 16 and 1 of system excitation control units 11 and 12
7 has been described, the same applies to the overexcitation limit control device.
【００２０】図４は本発明の同期機用励磁制限装置の第
３実施例を示すＡ系、Ｂ系励磁制御部１１、１２の信号
検出及び制限回路６、７の詳細構成図である。図４にお
いて、図３と同一符号は相当部分を示しているほか、４
１はリミッタ回路であって、自動追従回路４０の出力に
設けられる。本実施例では、待機系のＢ系励磁制限制御
部１２の低励磁制限制御装置１７の信号補正回路２４Ｂ
の補正値ΔＱrefは微小でよいため、自動追従回路４０
の出力にリミッタ回路４１を付加することにより、Ａ系
励磁制御部１１の異常時にＢ系低励磁制限制御装置１７
の信号補正回路２４Ｂの補正値ΔＱrefを過大に変化さ
せてしまうことを防止することができる。図示しない過
励磁制限制御装置についても同様である。FIG. 4 is a detailed configuration diagram of the signal detection and limiting circuits 6 and 7 of the A-system and B-system excitation control units 11 and 12 showing a third embodiment of the synchronous machine excitation limiting device of the present invention. In FIG. 4, the same reference numerals as those in FIG.
A limiter circuit 1 is provided at the output of the automatic tracking circuit 40. In the present embodiment, the signal correction circuit 24B of the low excitation limit controller 17 of the B system excitation limit controller 12 of the standby system.
The correction value ΔQ ref of
By adding the limiter circuit 41 to the output of the B system, when the A system excitation control unit 11 is abnormal, the B system low excitation limit control device 17
It is possible to prevent the correction value ΔQ ref of the signal correction circuit 24B from changing excessively. The same applies to an overexcitation limit control device (not shown).
【００２１】図５は図１の同期機出力制限曲線図であ
る。図５において、横軸に同期機１の有効電力Ｐ、縦軸
に無効電力＋Ｑ、−Ｑをとり、曲線ＡＢＣＤは同期機１
の出力限界曲線を示し、縦軸＋Ｑは遅相、過励磁運転、
縦軸−Ｑは進相、低励磁運転を示す。図中のＵＥＬREF
は図２、図３、図４の常用系となるＡ系、Ｂ系励磁制御
部１１、１２の低励磁制限制御装置１６、１７の低励磁
制限曲線、ＵＥＬ′REFは同じく待機系となるＡ系、Ｂ
系励磁制御部１１、１２の低励磁制限制御装置１６、１
７の信号補正回路２４Ａ、２４Ｂで補正値ΔＱrefだけ
補正された補正低励磁制限曲線である。また図中のＯＥ
ＬREF、ＯＥＬ′REFは同様に常用系、待機系となるＡ
系、Ｂ系励磁制御部１１、１２の図示しない過励磁制限
制御装置の過励磁制限曲線、補正過励磁制限曲線であ
る。FIG. 5 is a diagram of the synchronous machine output limiting curve of FIG. In FIG. 5, the horizontal axis represents the active power P of the synchronous machine 1 and the vertical axis represents the reactive powers + Q and -Q, and the curve ABCD represents the synchronous machine 1.
Shows the output limit curve of the vertical axis + Q is delayed, overexcitation operation,
The vertical axis −Q indicates the phase advance and the low excitation operation. UEL REF in the figure
2 is the normal system of FIGS. 2, 3 and 4, and the low excitation limit curves of the low excitation limit control devices 16 and 17 of the B system excitation control units 11 and 12, and UEL ' REF is also the standby system A. System, B
Low excitation limit control devices 16 and 1 of system excitation control units 11 and 12
7 is a corrected low excitation limit curve corrected by the correction value ΔQ ref by the signal correction circuits 24A and 24B of FIG. OE in the figure
Similarly, L REF and OEL ' REF are the normal system and the standby system.
3 is an overexcitation limit curve and a corrected overexcitation limit curve of an overexcitation limit control device (not shown) of the system and B system excitation control units 11 and 12.
【００２２】[0022]
【発明の効果】本発明によれば、常用系、待機系から成
る同期機用励磁制御装置において、待機系の励磁制限制
御装置のフィードバック信号の出力に信号補正回路の補
正値を与える機能を有しており、これによって常に待機
系の励磁制限制御装置を常用系よりも不動作側の状態に
することが可能となるので、待機系の励磁制限制御装置
が常に先行動作するから、よって常用、待機系の励磁制
御装置間の過大偏差信号を出すのをなくして、待機系の
励磁制御装置を異常と誤診断するのを防止することがで
きる。According to the present invention, in a synchronous machine excitation control device comprising a normal system and a standby system, a function of giving a correction value of a signal correction circuit to the output of a feedback signal of the standby system excitation limit control device is provided. Since this makes it possible to always put the standby system excitation limit control device in a state of non-operation than the normal system, the standby system excitation limit control device always operates in advance, so It is possible to prevent the standby system excitation control device from being erroneously diagnosed as abnormal by eliminating generation of an excessive deviation signal between the standby system excitation control devices.
【００２３】また、上記同期機用励磁制御装置におい
て、待機系の励磁制限制御装置の出力が常用系の励磁制
限制御装置の出力に追従するように、自動追従回路を付
加して追従制御をかけることにより、信号補正回路の補
正値で偏差をもたせた待機系の励磁制限制御装置の出力
を常に常用系の励磁制限制御装置の出力に追従している
ように修正することができるので、これにより常用、待
機系の励磁制限制御装置の出力を常に一致させることが
できるから、常用／待機切換時の電圧変動を極めて小さ
な値にすることができる。Further, in the above-mentioned synchronous machine excitation control device, an automatic follow-up circuit is added to perform follow-up control so that the output of the standby system excitation limit control device follows the output of the normal system excitation limit control device. By doing so, it is possible to correct the output of the standby-system excitation limit control device that has a deviation with the correction value of the signal correction circuit so that it always follows the output of the normal-system excitation limit control device. Since the outputs of the normal-use and standby-system excitation limit control devices can always be made to coincide with each other, the voltage fluctuation at the time of normal / standby switching can be made extremely small.
【００２４】さらに、上記同期機用励磁制御装置におい
て、上記自動追従回路の出力にリミッタ回路を設けるこ
とにより、常用系の励磁制御装置が異常になった場合に
も、待機系の励磁制限制御装置の出力に過大な補正をか
けるのを防ぐことができる効果がある。Further, in the excitation control device for the synchronous machine, by providing a limiter circuit at the output of the automatic follow-up circuit, even when the excitation control device for the normal system becomes abnormal, the excitation limit control device for the standby system is provided. There is an effect that it is possible to prevent applying excessive correction to the output of.
【図１】本発明の同期機用励磁制御装置の第１実施例を
示す構成図である。FIG. 1 is a configuration diagram showing a first embodiment of an excitation control device for a synchronous machine of the present invention.
【図２】図１の信号検出及び制限回路の詳細構成図であ
る。FIG. 2 is a detailed configuration diagram of a signal detection and limiting circuit in FIG.
【図３】本発明の同期機用励磁制御装置の第２実施例を
示す信号検出及び制限回路の詳細構成図である。FIG. 3 is a detailed configuration diagram of a signal detection and limiting circuit showing a second embodiment of the synchronous machine excitation control device of the present invention.
【図４】本発明の同期機用励磁制御装置の第３実施例を
示す信号検出及び制限回路の詳細構成図である。FIG. 4 is a detailed configuration diagram of a signal detection and limiting circuit showing a third embodiment of the synchronous machine excitation control device of the present invention.
【図５】図１から図４の同期機出力制限曲線図である。FIG. 5 is a synchronous machine output limiting curve diagram of FIGS. 1 to 4;
１ 同期発電機 ２ 励磁用電圧変成器 ３Ａ、３Ｂ 計器用電圧変成器 ４Ａ、４Ｂ 計器用電流変成器 ５ 界磁しゃ断器 ６、７ 信号検出及び制限回路 ８Ａ、８Ｂ ゲートパルス発生器 ９ 切換スイッチ １０ サイリスタ整流装置 １１、１２ 励磁制御部 １３ 発電機界磁巻線 １６、１７ 低励磁制限制御装置 ２１Ａ、２１Ｂ 電圧設定器 ２２Ａ、２２Ｂ 低励磁制限値設定器 ２４Ａ、２４Ｂ 信号補正回路 ２８Ａ、２８Ｂ 低励磁制限器 ４０ 自動追従回路 ４１ リミッタ回路 1 Synchronous generator 2 Voltage transformer for excitation 3A, 3B Voltage transformer for instrument 4A, 4B Current transformer for instrument 5 Field breaker 6, 7 Signal detection and limiting circuit 8A, 8B Gate pulse generator 9 Changeover switch 10 Thyristor rectifier 11, 12 Excitation control unit 13 Generator field winding 16, 17 Low excitation limit control device 21A, 21B Voltage setting device 22A, 22B Low excitation limit value setting device 24A, 24B Signal correction circuit 28A, 28B Low excitation Limiter 40 Automatic tracking circuit 41 Limiter circuit
Claims (6)
力とする自動電圧調整装置と、同期機無効電力と設定励
磁制限値の差信号を入力とする励磁制限制御装置と、自
動電圧調整装置出力と励磁制限制御装置出力の和信号を
入力として、同期機励磁用整流装置を制御するゲートパ
ルス発生器と、をそれぞれ有する常用系、待機系の励磁
制御部から成る同期機用励磁制御装置において、待機系
の励磁制御部の設定励磁制限値を増分補正する信号補正
回路を備えたことを特徴とする同期機用励磁制御装置。1. An automatic voltage adjustment device for inputting a difference signal between a synchronous machine terminal voltage and a set voltage, an excitation limit control device for inputting a difference signal between synchronous machine reactive power and a set excitation limit value, and automatic voltage adjustment. An excitation control device for a synchronous machine, which includes a gate pulse generator that controls a rectifier for exciting a synchronous machine, and a gate pulse generator that receives a sum signal of an output of the device and an output of the excitation limit control device, respectively, and an excitation control unit of a standby system 2. An excitation control device for a synchronous machine, comprising: a signal correction circuit that incrementally corrects a set excitation limit value of an excitation control unit of a standby system.
力とする自動電圧調整装置と、同期機無効電力と設定励
磁制限値の差信号を入力とする励磁制限制御装置と、自
動電圧調整装置出力と励磁制限制御装置出力の和信号を
入力として、同期機励磁用整流装置を制御するゲートパ
ルス発生器と、をそれぞれ有する常用系、待機系の励磁
制御部から成る同期機用励磁制御装置において、待機系
の励磁制御部の設定励磁制限値を増分補正する信号補正
回路と、常用系、待機系の励磁制限制御装置出力と待機
系の信号補正回路入力の間に設けた自動追従回路とを備
えたことを特徴とする同期機用励磁制御装置。2. An automatic voltage adjustment device for inputting a difference signal between a synchronous machine terminal voltage and a set voltage, an excitation limit control device for inputting a difference signal between synchronous machine reactive power and a set excitation limit value, and automatic voltage adjustment. An excitation control device for a synchronous machine, which includes a gate pulse generator that controls a rectifier for exciting a synchronous machine, and a gate pulse generator that receives a sum signal of an output of the device and an output of the excitation limit control device, respectively, and an excitation control unit of a standby system In, the signal correction circuit for incrementally correcting the set excitation limit value of the excitation control unit of the standby system, and the automatic tracking circuit provided between the output of the excitation limit control device of the normal system and the standby system and the input of the signal correction circuit of the standby system. An excitation control device for a synchronous machine, comprising:
力とする自動電圧調整装置と、同期機無効電力と設定励
磁制限値の差信号を入力とする励磁制限制御装置と、自
動電圧調整装置出力と励磁制限制御装置出力の和信号を
入力として、同期機励磁用整流装置を制御するゲートパ
ルス発生器と、をそれぞれ有する常用系、待機系の励磁
制御部から成る同期機用励磁制御装置において、待機系
の励磁制御部の設定励磁制限値を増分補正する信号補正
回路と、常用系、待機系の励磁制限制御装置出力と待機
系の信号補正回路入力の間に設けた自動追従回路と、自
動追従回路出力に設けたリミッタ回路とを備えたことを
特徴とする同期機用励磁制御装置。3. An automatic voltage adjustment device for inputting a difference signal between a synchronous machine terminal voltage and a set voltage, an excitation limit control device for inputting a difference signal between synchronous machine reactive power and a set excitation limit value, and automatic voltage adjustment. An excitation control device for a synchronous machine, which includes a gate pulse generator that controls a rectifier for exciting a synchronous machine, and a gate pulse generator that receives a sum signal of an output of the device and an output of the excitation limit control device, respectively, and an excitation control unit of a standby system In, the signal correction circuit for incrementally correcting the set excitation limit value of the excitation control unit of the standby system, and the automatic tracking circuit provided between the output of the excitation limit control device of the normal system and the standby system and the input of the signal correction circuit of the standby system. An excitation control device for a synchronous machine, comprising: a limiter circuit provided at the output of the automatic tracking circuit.
制御を行う励磁制御部を、２重化して一方を常用系、他
方を待機系として使用する同期機用励磁制御装置におい
て、待機系の励磁制御部のフィードバック量を常用系の
励磁制御部フィードバック量よりも不動作側にバイアス
偏差を持たせようにし、これによって常用系の励磁制御
部を常に待機系の励磁制御部より先に動作させるように
した同期機用励磁制御方法。4. An excitation control unit for a synchronous machine, wherein an excitation control section for feeding back an output of a synchronous machine and performing excitation control is duplicated and one is used as a normal system and the other is used as a standby system. The feedback amount of the control unit is made to have a bias deviation on the non-operating side of the feedback amount of the excitation control unit of the normal system, so that the excitation control unit of the normal system is always operated before the excitation control unit of the standby system. Excitation control method for synchronous machine.
制御を行う励磁制御部を、２重化して一方を常用系、他
方を待機系として使用する同期機用励磁制御装置におい
て、待機系の励磁制御部のフィードバック量を、常用系
の励磁制御部のフィードバック量よりも不動作側にバイ
アス偏差を持たせるようにし、この偏差を持たせたフィ
ードバック量を更に常用系の励磁制御部のフィードバッ
ク量に追従させるようにした同期機用励磁制御方法。5. An excitation control unit for a synchronous machine, wherein an excitation control unit for feeding back an output of a synchronous machine and performing excitation control is duplicated and one is used as a normal system and the other is used as a standby system. The feedback amount of the control unit is made to have a bias deviation on the non-operating side of the feedback amount of the excitation control unit of the normal system, and the feedback amount with this deviation is further used as the feedback amount of the excitation control unit of the normal system. Excitation control method for a synchronous machine so as to follow.
ドバック量にリミッタによる制限をかけるようにした同
期機用励磁制御方法。6. The excitation control method for a synchronous machine according to claim 5, wherein the follow-up feedback amount is limited by a limiter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5245415A JPH07107795A (en) | 1993-09-30 | 1993-09-30 | Apparatus and method for excitation control for synchronous machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5245415A JPH07107795A (en) | 1993-09-30 | 1993-09-30 | Apparatus and method for excitation control for synchronous machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07107795A true JPH07107795A (en) | 1995-04-21 |
Family
ID=17133319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5245415A Pending JPH07107795A (en) | 1993-09-30 | 1993-09-30 | Apparatus and method for excitation control for synchronous machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07107795A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342717A (en) * | 2020-03-27 | 2020-06-26 | 国网黑龙江省电力有限公司电力科学研究院 | Method for obtaining low excitation limit curve of steam turbine generator |
-
1993
- 1993-09-30 JP JP5245415A patent/JPH07107795A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111342717A (en) * | 2020-03-27 | 2020-06-26 | 国网黑龙江省电力有限公司电力科学研究院 | Method for obtaining low excitation limit curve of steam turbine generator |
| CN111342717B (en) * | 2020-03-27 | 2023-03-28 | 国网黑龙江省电力有限公司电力科学研究院 | Method for obtaining low excitation limit curve of steam turbine generator |
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