JPS60257798A - Excitation controller for synchronous generator - Google Patents
Excitation controller for synchronous generatorInfo
- Publication number
- JPS60257798A JPS60257798A JP59110790A JP11079084A JPS60257798A JP S60257798 A JPS60257798 A JP S60257798A JP 59110790 A JP59110790 A JP 59110790A JP 11079084 A JP11079084 A JP 11079084A JP S60257798 A JPS60257798 A JP S60257798A
- Authority
- JP
- Japan
- Prior art keywords
- limiter
- output
- synchronous generator
- overexcitation
- voltage
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は同期発電機の励磁制御装置に係り、特に、励磁
電流を制限する装置を二組備え、一方を待機状態として
使用するに好適な二重化励磁制御装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an excitation control device for a synchronous generator, and in particular, a duplex system comprising two sets of excitation current limiting devices, one of which is suitable for use in a standby state. This invention relates to an excitation control device.
従来の同期発電機用励磁制御装置の構成を第3図に示す
。図において、】は同期発電機、2は1の界磁巻線、3
は励磁型FA変圧器、4はサイリスタ変換器、5は界磁
しゃ断器、6,7.9はCT、8はPT、10は発電機
の端子電圧を一定に制御する自動系、11は電圧制御系
、12は低励磁制限装置、13は過励磁制限装置、40
は自動系のバックアップの手動系、60は自動系と手動
系を切換える切換装置である。同期発電機の端子電圧は
2丁8により検出し、電圧制御系】1に入力される。The configuration of a conventional excitation control device for a synchronous generator is shown in FIG. In the figure, ] is a synchronous generator, 2 is a field winding of 1, and 3 is a synchronous generator.
is an excitation type FA transformer, 4 is a thyristor converter, 5 is a field breaker, 6, 7.9 is a CT, 8 is a PT, 10 is an automatic system that controls the terminal voltage of the generator at a constant level, 11 is a voltage Control system, 12 is a low excitation limiter, 13 is an overexcitation limiter, 40
6 is a manual system as a backup for the automatic system, and 60 is a switching device for switching between the automatic system and the manual system. The terminal voltage of the synchronous generator is detected by the second pin 8 and inputted to the voltage control system 1.
整流器]11により直流に変換されたPT二次電圧と電
圧設定器113の設定値との比較を加算器112で行な
う。設定値からの偏差信号は増+jj器114で増巾さ
れ制御装置115の出力によりサイリスタ変換器4の点
弧角を制御することにより、同期発電機の界磁電流を調
整し端子電圧を一定に制御する。An adder 112 compares the PT secondary voltage converted into DC by the rectifier 11 and the set value of the voltage setter 113. The deviation signal from the set value is amplified by the amplifier 114, and the firing angle of the thyristor converter 4 is controlled by the output of the control device 115, thereby adjusting the field current of the synchronous generator and keeping the terminal voltage constant. Control.
同期発電機1は、一般に、電力系統と並列運転される。The synchronous generator 1 is generally operated in parallel with the power system.
この時の電力系統の条件によっては同期発電機1の端子
電圧を一定に保とうとし、界磁巻線2に許容値以上の界
磁電流が流れる場合がある。Depending on the conditions of the power system at this time, the terminal voltage of the synchronous generator 1 may be kept constant, and a field current exceeding a permissible value may flow through the field winding 2.
このため、界磁電流をサイリスタ変換器の交流側に備え
たCr2と検出器131により検出し、設定器133の
値より大きくなった場合は、加算機134を通して電圧
制御系11の制御器]15に減磁信号を与えることによ
り界磁電流を制限する。Therefore, the field current is detected by Cr2 and the detector 131 provided on the AC side of the thyristor converter, and if it becomes larger than the value of the setting device 133, it is passed through the adder 134 to the controller of the voltage control system 11. The field current is limited by applying a demagnetizing signal to the
この制限装置を過励磁制限装置13と盾う。逆に、界磁
電流が低下しすぎると同期発電機は低励磁状態どなり、
電力系統と同期を保って運転出来なくなる場合がある。This limiting device is used as an overexcitation limiting device 13. Conversely, if the field current drops too much, the synchronous generator will go into a low excitation state.
It may become impossible to operate in synchronization with the power grid.
この不具合を防止するため、同期発電機の低励磁状態を
検出器121で検出し、設定器123の値以下になった
場合は電圧制御系]1]の制御器115に増磁信号を与
えることにより界磁電流の低下を制限する。この制限装
置を低励磁制限装置12を言う。第1図には図示してな
いが、この他同期発電機の回転数低下しこよる低周波過
励磁を防止するV / I−1z制限装置等の制限装置
を自動系10の機能として備える場合がある。In order to prevent this problem, the low excitation state of the synchronous generator is detected by the detector 121, and if the value falls below the value of the setting device 123, a magnetizing signal is given to the controller 115 of the voltage control system [1]. This limits the drop in field current. This limiting device is referred to as a low excitation limiting device 12. Although not shown in FIG. 1, there is a case where the automatic system 10 is equipped with a limiting device such as a V/I-1z limiting device that prevents low-frequency overexcitation that would otherwise cause a decrease in the rotational speed of the synchronous generator. There is.
従来から自動系]0の故障時のバックアップ系として手
動系40を備えていた。Conventionally, a manual system 40 has been provided as a backup system in the event of a failure of the automatic system]0.
ところが、近年の同期発電機の単機容量の増大、電力系
統の安定度低下等により、従来のバンクアップ系である
手動系40による運転では系統事故が発生すると同期運
転を保てず脱調となる場合がある。又、手動系40によ
る運転の場合は、運転員が、常時、負荷変動等を監視し
設定器403を操作しなければならない。そこで自動系
10の二重化による運転信頼性の向上が一段と強く要求
されてきた。However, due to the recent increase in the single unit capacity of synchronous generators and the decrease in stability of the power system, operation using the manual system 40, which is a conventional bank-up system, cannot maintain synchronized operation when a system fault occurs, resulting in loss of synchronization. There are cases. Furthermore, in the case of operation using the manual system 40, an operator must constantly monitor load fluctuations and operate the setting device 403. Therefore, there has been an even stronger demand for improving operational reliability by duplicating the automatic system 10.
第2図は、自重系を二重化した従来例である。FIG. 2 shows a conventional example in which the self-weight system is duplicated.
従来の自動系を単に二重化した場合には、特開昭55−
29237号で詳細に述へられているように、待機され
ている系の電圧設定器の自動追従が異常となる場合があ
る。If the conventional automatic system is simply duplicated, JP-A-55-
As described in detail in No. 29237, the automatic tracking of the voltage setter in the standby system may become abnormal.
この特許出願は待機中の制限装置、たとえば、過励磁制
限装置1.313の動作点が運転中の過励磁制限装置の
13Aの動作範囲より外側となるようにリレーの接点で
加算器132Bに固定信号を加算している。This patent application fixes a standby limiter, for example, an overexcitation limiter 1.313, to an adder 132B with a relay contact so that the operating point of the overexcitation limiter 1313 is outside the operating range of 13A of the overexcitation limiter during operation. Adding signals.
ところで、この案では、さらに、次の不具合が発生する
おそれがある。すなわち、今、A系が運転中でB系が待
機中における運転状態を考える。By the way, with this proposal, there is a possibility that the following problem may occur. In other words, consider the operating state in which system A is in operation and system B is on standby.
電力系統の電圧が低下すると同期発電機の端子電圧を一
定に制御しようとして、電圧制御系]]、Aより増磁指
令が出、サイリスタ変換器4の出力、すなわち、界磁電
流も増加する。界磁電流が設定器】33Aの仏具」二と
なれば、過励磁制限装置1.3Aより減磁信号が出て最
終的には界磁電流は設定器133Aに近い値になる。一
方、B系の過励磁制限装置13Bの動作点は設定器13
3BとV 2 Bの和となってるので過励磁制限装置1
3 Bの出力は零である。When the voltage of the power system decreases, in an attempt to keep the terminal voltage of the synchronous generator constant, a magnetization command is issued from the voltage control system A, and the output of the thyristor converter 4, that is, the field current also increases. When the field current reaches 33A, a demagnetization signal is output from the overexcitation limiting device 1.3A, and the field current finally reaches a value close to that of the setting device 133A. On the other hand, the operating point of the B-system overexcitation limiting device 13B is determined by the setting device 13.
Since it is the sum of 3B and V 2B, overexcitation limiter 1
The output of 3B is zero.
A系の過励磁制限装置13Aの出力が出ているにもかか
わらず、■3系の過励磁制限装置1.3 Bの出力は零
となっているため、B系の自動系1 ]、 Bの出力は
、増磁側へ大きな信号を出していることが考えられる。Although the output of the overexcitation limiter 13A of the A system is output, the output of the overexcitation limiter 1.3B of the system 3 is zero, so the automatic system 1 of the B system], B It is thought that the output of is sending out a large signal to the magnetizing side.
このため、運転中の電圧設定器1]3Aが定格値、すな
わち、100%電圧相当にあるにもかかわらず待機中の
電圧設定器113Bは自動追従装置50Bの動作によっ
て現在運転されている発電機端子電圧値(たとえば95
%電圧)まで不必要に調整されてしまう。この状態で電
力系統の条件が元に復帰し、さらに、運転中のA系が故
障し、待機系へ切換わったとすると発電機端子電圧は異
常に低下してしまうことが考えられる。Therefore, even though the voltage setting device 1]3A in operation is at the rated value, that is, equivalent to 100% voltage, the voltage setting device 113B in standby is connected to the generator currently in operation due to the operation of the automatic follow-up device 50B. Terminal voltage value (for example 95
% voltage). In this state, if the conditions of the power system are restored to their original state, and furthermore, if the operating system A breaks down and is switched to the standby system, it is conceivable that the generator terminal voltage will drop abnormally.
〔発明の目的〕 本発明の目的は、制限装置が動作時も、常に。[Purpose of the invention] It is an object of the present invention to ensure that the restriction device operates at all times.
待機中の電圧設定器の自動追従を確実に行なう二重化励
磁制御装置を提供するにある。An object of the present invention is to provide a redundant excitation control device that reliably automatically follows a voltage setting device during standby.
本発明の要点は運転中の制限装置の出力を待機中の制限
装置の出力を比較し、待機中の制限装置の出力が運転中
の制限装置の出力に一致するように待機中の制限装置の
設定値を自動補正するようにしたことにある。The key point of the present invention is to compare the output of the limiter in operation with the output of the limiter in standby, and to adjust the output of the limiter in standby so that the output of the limiter in standby matches the output of the limiter in operation. The reason is that the setting values are automatically corrected.
以下、本発明の一実施例を第3図、第4図により説明す
る。第3図は本発明の全体構成図を示す。An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. FIG. 3 shows an overall configuration diagram of the present invention.
今、A系が運転中で、B系が待機中と考える。過励磁制
限装置iR1,3Bの設定器113Bの値がA系の設定
器1]3Aの値より製品のバラツキ等によりわずかに低
いとする。電力系統の電圧が低下すると同期発電機の端
子電圧を一定に保とうとするため、電圧制御系!1.A
より増磁指令が出され、界磁電流が設定器】]3Bの値
より増加すると過励磁制限装置1.3 Bより減磁信号
が出力され、界磁過電流を防止する。一方、A系の設定
器1]3Aの値は、B系のそれよりも高めになっている
ためA系の過励磁制限装置]3Aの出力はB系の過励磁
制限装置]、 3 Bの出力より低い値が又は零出力と
なっている。過励磁制限装置用補正装置30Bで各過励
磁制限装置の出力偏差を検出し、B系の過励磁制限装置
]3Bの加算器132Bへ偏差がなくなるまで補正信号
を与えるようにする。この結果、A系、B系間の過励磁
制限装置]3A。It is assumed that the A system is currently in operation and the B system is on standby. It is assumed that the value of the setter 113B of the overexcitation limiter iR1, 3B is slightly lower than the value of the setter 1]3A of the A system due to product variations or the like. When the power system voltage drops, the synchronous generator tries to keep the terminal voltage constant, so the voltage control system! 1. A
When the magnetization command is issued and the field current increases beyond the value of the setter 1.3B, a demagnetization signal is output from the overexcitation limiter 1.3B to prevent field overcurrent. On the other hand, since the value of setting device 1 of system A] 3A is higher than that of system B, the output of system A's overexcitation limiter] 3A is the output of system B's overexcitation limiter], 3B's A value lower than the output or zero output. The overexcitation limiter correction device 30B detects the output deviation of each overexcitation limiter, and supplies a correction signal to the adder 132B of the B-system overexcitation limiter [3B] until the deviation disappears. As a result, the overexcitation limiting device between system A and system B] 3A.
13Bに設定バラツキ等があっても、同一信号が出力さ
れる。従って、自動追従50Bによって制御される電圧
設定器113Bの設定はA系の電圧設定器113Aとほ
ぼ同一の値になり、好都合となる。逆に、過励磁制御装
置13 Bの設定器1.33 Bの値がA系の設定器]
33Aの値より製品のバラツキ等によりわずかに低いと
する。電力系統の電圧が低下すると同期発電機の端子電
圧を一定に保とうとするため電圧制御系11Aより増磁
指令が出され、界磁電流が設定器113Aの値より増加
すると、過励磁制限装置13Aより減磁信号が出力され
界磁電流は設定器1]3Aの値に制限される。このため
、界磁電流はB系過励磁制限装置13Bの制限動作以内
となっているため、出力信号は零のままである。過励磁
制限装置用補正装置30Bにより各過励磁制限装置の出
力電圧の偏差を検出し、B系の過励磁制限装置13Bの
加算器132Bへ偏差がなくなるまで補正信号を与える
。Even if there is a setting variation in 13B, the same signal is output. Therefore, the setting of the voltage setter 113B controlled by the automatic follow-up 50B becomes approximately the same value as the voltage setter 113A of the A system, which is convenient. On the other hand, the setting device 1.33 of the overexcitation control device 13B has the value of A system]
It is assumed that the value is slightly lower than the value of 33A due to product variations. When the voltage of the power system decreases, the voltage control system 11A issues a magnetization command to keep the terminal voltage of the synchronous generator constant, and when the field current increases beyond the value of the setting device 113A, the overexcitation limiting device 13A A demagnetization signal is outputted, and the field current is limited to the value of setter 1] 3A. Therefore, since the field current is within the limit operation of the B-system overexcitation limiting device 13B, the output signal remains zero. The overexcitation limiter correction device 30B detects the deviation in the output voltage of each overexcitation limiter, and supplies a correction signal to the adder 132B of the B-system overexcitation limiter 13B until the deviation disappears.
この結果、前述の場合と同様、自動追従装[,50Bに
よりB系の電圧設定器113Bの値は、A系の電圧設定
器]13Aとほぼ同一の値に自動追従され、好都合とな
る。このように、運転中の系(以上の説明例ではA系)
の過励磁制限装置の出力に待機中の系(以」二の説明例
ではB系)の過励磁制限装置の出力が等しくなるように
、常時、自動補正し、さらに従来通り待機中の電圧設定
器を自動追従しておけば、運転中の系の故障等で待機系
へ切換でも同期発電機の運転状態を故障発生前の状態に
保持出来る。As a result, as in the case described above, the value of the B-system voltage setter 113B is automatically tracked to almost the same value as the A-system voltage setter 13A by the automatic tracking device [, 50B], which is convenient. In this way, the system in operation (system A in the above example)
The output of the overexcitation limiter of the standby system (system B in the following example) is automatically corrected at all times so that the output of the overexcitation limiter of the system is equal to the output of the overexcitation limiter of the standby system. If the generator is automatically tracked, even if the operating system is switched to the standby system due to a failure, etc., the operating state of the synchronous generator can be maintained in the state before the failure occurred.
第4図に補正回路40Bの詳細例を示す。運転中のA系
過励磁制限装置13Aの出力と待機中のB系過励磁制限
装置1.3 Bの出力を加算器31に入力し、その偏差
を検出する。検出された偏差信号はA系が運転中の条件
の下で演算器36(積分器又は単なる増巾器として使用
)を通してB系過励磁制限装置1.3 Bの加算器13
2Bに補正信号として与えるようにする。FIG. 4 shows a detailed example of the correction circuit 40B. The output of the A-system overexcitation limiting device 13A in operation and the output of the B-system overexcitation limiting device 1.3B in standby are input to the adder 31, and the deviation between them is detected. The detected deviation signal is sent to the B system overexcitation limiting device 1.3 through the arithmetic unit 36 (used as an integrator or simple amplifier) under the condition that the A system is in operation.
2B as a correction signal.
この補正信号の最大値はA系の過励磁制限装置13B中
の検出器〕31B、設定器133B、増rj+器134
BとA系のそれとの製品バラツキを補償する必要最低限
とする。この様に、補正信号の最大値を選定しておけば
、待機中の過励磁制限装置13Bに何らかの故障が発生
した場合のみ、補正信号を過励磁制限装置1.3 Bの
加算器132Bに加えても、B系の過励磁制限装置1.
3 Bの出力は、運転中の過励磁制限装置1.3Aの出
力と等しくならない。第4図の加算器31の出力を比較
器32に加え、A系運転中の条件で、この比較器32が
一定時間以上動作したことをタイマ33で検出してやれ
ば、待機中の過励磁制限装置が異常であるとことが検出
可能である。低励磁制限装置等信の制限装置についても
、ま・つたく同一の動作原理で対応出来ることは言うま
でもない。The maximum value of this correction signal is determined by the detector] 31B in the overexcitation limiting device 13B of the A system, the setting device 133B, and the rj+ device 134.
Minimum necessary to compensate for product variations between B and A series. In this way, by selecting the maximum value of the correction signal, the correction signal is added to the adder 132B of the overexcitation limiter 1.3B only when some kind of failure occurs in the standby overexcitation limiter 13B. However, the B system overexcitation limiting device 1.
The output of 3B is not equal to the output of the overexcitation limiter 1.3A during operation. If the output of the adder 31 in FIG. 4 is added to the comparator 32, and the timer 33 detects that the comparator 32 has operated for a certain period of time or more under the condition that the A system is in operation, the overexcitation limiter is in standby mode. It is possible to detect that something is abnormal. It goes without saying that the same principle of operation can also be used for limiting devices such as low excitation limiting devices.
本発明は、アナログ式の励磁制御装置を例にとって説明
したが、ディジタル式の場合も本発明はそのまま利用可
能である。Although the present invention has been explained by taking an analog type excitation control device as an example, the present invention can also be used as is in the case of a digital type.
なお、図中122は加算器、124は増lJ器、】32
は加算器、401は検出器、402は加算器、40−4
は制御器、51 A、+ 51 BはAND回路、34
はAND回路、35はスイッチ、36は演算器、2OA
、20Bは低励磁制限装置用補正装置、30A、、30
Bは過励磁制限装置用補正装置である。In the figure, 122 is an adder, 124 is an adder, ]32
is an adder, 401 is a detector, 402 is an adder, 40-4
is a controller, 51 A, +51 B is an AND circuit, 34
is an AND circuit, 35 is a switch, 36 is an arithmetic unit, 2OA
, 20B is a correction device for low excitation limiting device, 30A, 30
B is a correction device for the overexcitation limiting device.
本発明によれば、いかなる電力系統の条件下でも、待機
中の電圧設定器の異常自動追従の防止が図れ、待機中の
各制限装置の異常を自動的に検出てきる。According to the present invention, it is possible to prevent the voltage setter from automatically following an abnormality while on standby under any power system condition, and to automatically detect an abnormality of each limiting device during standby.
第1図は従来の一般的な同期発電機用励磁制御装置の構
成図、第2図は従来の二重化された同期発電機用励磁制
御装置の構成図、第3図は発明の一実施例の二重化され
た同期発電機用励磁制御装置の構成図、第4図は発明の
一実施例の過励磁制限装置用補正装置の機能構成図であ
る。
20゛・、低励磁制限装置用補正装置、30・・過励磁
制限゛装置用補正装置、50・・自動追従装置。
吊1図
1(′l
も3のFig. 1 is a block diagram of a conventional general excitation control device for a synchronous generator, Fig. 2 is a block diagram of a conventional duplex excitation control device for a synchronous generator, and Fig. 3 is a block diagram of an excitation control device for a conventional dual synchronous generator. FIG. 4 is a block diagram of a duplexed excitation control device for a synchronous generator, and FIG. 4 is a functional block diagram of a correction device for an overexcitation limiting device according to an embodiment of the invention. 20.. Correction device for low excitation limiting device; 30.. Correction device for overexcitation limiting device; 50.. Automatic tracking device. Hanging 1 figure 1 ('l also 3
Claims (1)
御する複数の自動系と、励磁電流を制限する複数の制限
装置と、一方が運転してる場合は、他方が待機し、運転
している系に異常が発生した時は自動又は手動操作で待
機系へ切換えて運用する同期発電機の励磁制御装置にお
いて、運転状態にある前記制限装置の出力と待機状態に
ある前記制限装置の出力を比較する手段と、両者間に偏
差が出た場合は偏差をなくすように待機状態にある前記
制限装置の設定値を自動補正する手段とからなることを
特徴とする同期発電機用励磁制御装置。 2、特許請求の範囲第1項において、 待機系の自動補正信号が継続したことで待機系の前記制
限装置を異常と判断する警報手段を備えたことを特徴と
する同期発電機用励磁制御装置。[Scope of Claims] 1. A plurality of automatic systems that control the excitation current of the synchronous generator and keep the terminal voltage constant; and a plurality of limiting devices that limit the excitation current; when one is in operation, the other In the excitation control device of the synchronous generator, which automatically or manually switches to the standby system when an abnormality occurs in the operating system, the output of the limiting device in the operating state and the standby state are controlled. Synchronization characterized by comprising means for comparing the outputs of a certain limiting device, and means for automatically correcting the set value of the limiting device in a standby state so as to eliminate the deviation when a deviation occurs between the two. Excitation control device for generator. 2. An excitation control device for a synchronous generator according to claim 1, characterized in that the excitation control device for a synchronous generator is provided with an alarm means for determining that the limiting device in the standby system is abnormal due to the continuation of the automatic correction signal in the standby system. .
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59110790A JPS60257798A (en) | 1984-06-01 | 1984-06-01 | Excitation controller for synchronous generator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59110790A JPS60257798A (en) | 1984-06-01 | 1984-06-01 | Excitation controller for synchronous generator |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60257798A true JPS60257798A (en) | 1985-12-19 |
Family
ID=14544696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59110790A Pending JPS60257798A (en) | 1984-06-01 | 1984-06-01 | Excitation controller for synchronous generator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60257798A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0398497A (en) * | 1989-09-11 | 1991-04-24 | Hitachi Ltd | Generator exciter, synchronizer controller, and malfunction detection method for them |
-
1984
- 1984-06-01 JP JP59110790A patent/JPS60257798A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0398497A (en) * | 1989-09-11 | 1991-04-24 | Hitachi Ltd | Generator exciter, synchronizer controller, and malfunction detection method for them |
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