JPH08166828A - Reactive power compensating device - Google Patents
Reactive power compensating deviceInfo
- Publication number
- JPH08166828A JPH08166828A JP6310216A JP31021694A JPH08166828A JP H08166828 A JPH08166828 A JP H08166828A JP 6310216 A JP6310216 A JP 6310216A JP 31021694 A JP31021694 A JP 31021694A JP H08166828 A JPH08166828 A JP H08166828A
- Authority
- JP
- Japan
- Prior art keywords
- limiter
- voltage
- reactive power
- circuit
- control
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Electrical Variables (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、無効電力補償装置に係
り、特に、系統故障復旧後の長時間リミッタ運転となる
のを防止し、電圧変動抑制効果を有効に使用できる無効
電力補償装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactive power compensator, and more particularly to a reactive power compensator capable of preventing a long-time limiter operation after system failure recovery and effectively using a voltage fluctuation suppressing effect. .
【０００２】[0002]
【従来の技術】この種の無効電力補償装置(Statoc Var
Compensator，以下、「ＳＶＣ」と称する。）１の代表的
なものは、図３に示すように、コンデンサ２に、サイリ
スタ３，リアクトル４，変圧器５からなる直回路を並列
接続してなる無効電力発生装置６、及びサイリスタ３を
電源からの信号を基に位相制御できる制御装置７から構
成されており、サイリスタ３を制御装置７からの制御信
号で制御してリアクトル４に流す電流ＩLSを制御するこ
とにより、設備で消費される無効電力Ｉqs（＝Ｉcs−I
LS）を連続的に制御できるようにした装置である。2. Description of the Related Art This type of reactive power compensator (Statoc Var
Compensator, hereinafter referred to as "SVC". ) 1 is a typical one, as shown in FIG. 3, a capacitor 2, a reactive power generator 6 which is connected in parallel with a direct circuit consisting of a thyristor 3, a reactor 4 and a transformer 5, and a thyristor 3 as a power source. The thyristor 3 is controlled by the control signal from the control device 7 to control the current I LS flowing to the reactor 4 and is consumed by the equipment. Reactive power Iqs (= Ics-I
LS ) is a device that allows continuous control.
【０００３】ＳＶＣ１は、負荷変動に起因する系統の電
圧変動に対しては非常に有効であり、常時の電圧変動に
よるリミッタ運転を防止する方法は、特公昭62−277027
号公報のような方法がある。又、系統事故前の制御出力
を記憶し、再起動する方法として、特公昭61−293258号
公報がある。The SVC 1 is very effective against voltage fluctuations in the system due to load fluctuations, and a method for preventing limiter operation due to constant voltage fluctuations is disclosed in Japanese Examined Patent Publication No. 62-277027.
There is a method like the one in the publication. Also, as a method of storing the control output before the system fault and restarting, there is JP-B-61-293258.
【０００４】[0004]
【発明が解決しようとする課題】上記の方法で、系統事
故復旧後の電圧変動が大きい場合に制御出力がリミッタ
にかかり、電圧抑制効果が半減する可能性がある。特
に、電圧変動に弱い系統では、脱調することも考えられ
る。系統事故復旧後の電圧変動を確実に抑制するために
は、系統事故を検出し、制御を切り換える方法が必要で
ある。In the above method, the control output is subject to the limiter when the voltage fluctuation after the system fault recovery is large, and the voltage suppression effect may be halved. In particular, in a system that is vulnerable to voltage fluctuations, it is possible to lose synchronization. In order to reliably suppress voltage fluctuations after system failure recovery, a method of detecting system failure and switching control is necessary.
【０００５】本発明の目的は、送電線地絡事故等の系統
故障を検出し、再閉路や回線遮断による電圧変動を確実
に抑制し、系統を安定化させる無効電力補償装置を提供
することにある。An object of the present invention is to provide a reactive power compensator for detecting a system failure such as a transmission line ground fault and for surely suppressing voltage fluctuations due to reclosing or circuit interruption and stabilizing the system. is there.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に、本発明は母線電圧の不足電圧検出，保護リレー及び
遮断器条件で、系統故障を検出した。常時は制御装置の
出力にリミッタを設け制御範囲を制限し、故障検出で制
御範囲を広げるようにした。又、常時は、制御装置の出
力にリミッタを用いている為、リミッタ運転となってい
ることを検出し、他の調相設備への制御依頼を出力し、
長時間リミッタ運転となることを防止するようにした。In order to achieve the above-mentioned object, the present invention detects a system failure in bus voltage undervoltage detection, protection relay and circuit breaker conditions. A limiter is normally provided on the output of the control device to limit the control range, and the control range is expanded by detecting a failure. Also, because a limiter is always used for the output of the control device, it is detected that limiter operation is in progress, and a control request to other phase adjusting equipment is output.
The limiter operation is prevented for a long time.
【０００７】[0007]
【作用】例えば、送電線地絡事故後の再閉路又は、１回
線遮断後のインピーダンスの急変により、母線の電圧も
急変する。従来方式では電圧変動に応じて、ＳＶＣを制
御するが、事故前のＳＶＣ出力により、ＳＶＣの容量が
不足し、十分に電圧変動を抑制できない可能性がある。
本発明の方法によれば、常時、リミッタにより、系統事
故後の変動分をみこして、容量に余裕を確保し、系統事
故時、事故を検出しリミッタを制御する。従って、系統
事故後の電圧の変動を確実に抑制できる。For example, the voltage of the busbar also suddenly changes due to the reclosing of the line after the ground fault of the transmission line or the sudden change of the impedance after the disconnection of one circuit. In the conventional method, the SVC is controlled according to the voltage fluctuation, but the SVC output before the accident may cause insufficient SVC capacity and may not be able to sufficiently suppress the voltage fluctuation.
According to the method of the present invention, the limiter always allows the fluctuation amount after the system fault to be taken into consideration to secure the capacity, and at the time of the system fault, the fault is detected and the limiter is controlled. Therefore, it is possible to reliably suppress the fluctuation of the voltage after the system fault.
【０００８】[0008]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【０００９】図１は、本発明のＳＶＣの実施例を示すブ
ロック図である。制御装置７０は、系統に接続された変
成器９からの検出信号により、電圧を検出する電圧検出
器１１，この電圧が設定された電圧となる様に制御量を
決める定電圧制御AVR12 と、この制御指令値に制限を与
えるリミッタ１４，ゲートを制御するパルスを出力する
APPS15からなる制御系に、回線条件８と電圧検出器１１
の情報で系統事故を判定し、リミッタ１４にリミッタ切
り換え指令を与える系統事故判定回路１３及びリミッタ
運転検出器１６を追加し、他の調相用コンデンサ１０へ
の入切指令依頼を出力する構成となっている。FIG. 1 is a block diagram showing an embodiment of the SVC of the present invention. The control device 70 includes a voltage detector 11 that detects a voltage based on a detection signal from the transformer 9 connected to the system, a constant voltage control AVR12 that determines a control amount so that this voltage becomes a set voltage, and Limiter 14 that limits the control command value, and outputs the pulse that controls the gate
Line condition 8 and voltage detector 11 in the control system consisting of APPS15
A system fault determination circuit 13 that gives a limiter switching command to a limiter 14 and a limiter operation detector 16 are added to determine a system fault based on the information of 1. Has become.
【００１０】平常時は、系統事故時の電圧変動を見越し
たリミッタ幅を準備し、リミッタ１４にて出力を抑制し
た運転を実施し、他の調相設備の応動を待つか、リミッ
タ運転検出１６で、ＳＶＣがリミッタ運転中であること
を検出して、調相用コンデンサ１０等の調相設備への制
御依頼信号を出力して、長時間リミッタ運転となること
を防止する。During normal times, a limiter width is prepared in anticipation of voltage fluctuations at the time of a system fault, operation is performed with the output suppressed by the limiter 14, and the operation of other phase adjusting equipment is awaited or the limiter operation detection 16 Then, it is detected that the SVC is in the limiter operation, and a control request signal to the phase adjusting equipment such as the phase adjusting capacitor 10 is output to prevent the limiter operation for a long time.
【００１１】系統故障時には、不足電圧継電器動作又は
ＣＢ入切状態により、系統事故を判定し、リミッタ１４
のリミッタ幅を広げて、系統の電圧変動を抑制する。At the time of system failure, the system fault is judged by the operation of the undervoltage relay or the CB on / off state, and the limiter 14
The limiter width is increased to suppress system voltage fluctuations.
【００１２】送電線一回線地絡故障時の電圧抑制に本発
明を適用した場合の応動について図２に示す。送電線の
一回線地絡故障時、系統の電圧は、地絡により一担低下
したあと、事故回線の遮断により復旧するが、送電線の
インピーダンスを一回線当たりＸL とすると、二回線か
ら一回線送電となることにより、１／２ＸLからＸLと増
加し、ＳＶＣが設置されている負荷端の電圧は低下す
る。従来方式では、この電圧変動に対応する予備容量を
持っていない為、ＳＶＣではこの電圧変動を抑制するこ
とはできず、リミッタ運転となる。本発明では、常時リ
ミッタを用いて系統事故後の電圧変動を見込んでＳＶＣ
の容量を確保しており、リミッタを開くことにより、系
統電圧変動を高速に抑制することが可能となる。FIG. 2 shows the response when the present invention is applied to the voltage suppression at the time of a ground fault in a single transmission line. When one line ground fault of the transmission line, the voltage of the system, then after lowering one responsible by ground fault, but restored by interrupting the accident line, when the impedance of the transmission line and one line per X L, one to two lines by the line transmission, it increased from 1 / 2X L and X L, the voltage across the load which SVC is established is reduced. Since the conventional system does not have a reserve capacity corresponding to this voltage fluctuation, the SVC cannot suppress this voltage fluctuation and the limiter operation is performed. In the present invention, a limiter is always used to anticipate voltage fluctuations after a system fault, and
The capacity is secured, and the system voltage fluctuation can be suppressed at high speed by opening the limiter.
【００１３】[0013]
【発明の効果】本発明によれば、系統故障除去後の電圧
変動の抑制が高速にできる為、系統運用上特に問題とな
る故障除去後の電力動揺抑制の効果がある。As described above, according to the present invention, the voltage fluctuation after the system fault is removed can be suppressed at a high speed, so that there is an effect of suppressing the power fluctuation after the fault removal, which is a particular problem in system operation.
【図１】本発明の一実施例の制御ブロック図。FIG. 1 is a control block diagram of an embodiment of the present invention.
【図２】図１の制御ブロックを適用した場合の制御系の
動きを示すタイムチャート。FIG. 2 is a time chart showing the movement of the control system when the control block of FIG. 1 is applied.
【図３】ＳＶＣの原理的構成を示す回路図。FIG. 3 is a circuit diagram showing a principle configuration of an SVC.
２，１０…調相用コンデンサ、３…サイリスタ、４…リ
アクトル、５…変圧器、８…遮断器、１２…定電圧制御
ブロック、１５…自動パルス位相器。2, 10 ... Phasing capacitor, 3 ... Thyristor, 4 ... Reactor, 5 ... Transformer, 8 ... Circuit breaker, 12 ... Constant voltage control block, 15 ... Automatic pulse phase shifter.
Claims (3)
び前記調相用リアクトルに流れる電流を制御できるスイ
ッチング素子を調相すべき電力系からの信号と基準電圧
との電圧偏差が零となるように駆動制御できる制御装置
において、系統事故の判定手段と、前記制御装置の制御
範囲を広げる回路とを設けたことを特徴とする無効電力
補償装置。1. A phase deviation capacitor and a switching element capable of controlling a current flowing through the phase modification reactor and a switching element capable of controlling a current flowing through the phase modification reactor have a zero voltage deviation between a signal from a power system and a reference voltage. In the control device capable of driving control as described above, a reactive power compensating device is provided, which is provided with a system failure determination means and a circuit for expanding a control range of the control device.
は、自端の送電線保護又は母線保護等の保護リレー動作
と、遮断器の切状態及び、母線電圧の不足電圧リレー動
作の条件で判定する無効電力補償装置。2. The system fault judging means according to claim 1, wherein a protection relay operation for protection of a transmission line or a bus bar at its own end, a circuit breaker off state, and an undervoltage relay operation of a bus voltage. Reactive power compensator for judging.
てリミッタ運転となったことを検出し、前記調相用コン
デンサの制御装置に前記遮断器の入切依頼を出力し、長
時間リミッタ運転となるのを防止する回路を設けた無効
電力補償装置。3. The limiter operation according to claim 1, wherein it is detected that the limiter operation is performed with respect to a constant voltage fluctuation, and a request to turn on / off the circuit breaker is output to a control device for the phase-adjusting capacitor, and a long-time limiter A reactive power compensator provided with a circuit for preventing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310216A JPH08166828A (en) | 1994-12-14 | 1994-12-14 | Reactive power compensating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6310216A JPH08166828A (en) | 1994-12-14 | 1994-12-14 | Reactive power compensating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08166828A true JPH08166828A (en) | 1996-06-25 |
Family
ID=18002598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6310216A Pending JPH08166828A (en) | 1994-12-14 | 1994-12-14 | Reactive power compensating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08166828A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101068892B1 (en) * | 2009-09-30 | 2011-09-30 | 한국전력공사 | Static var compensator and method for controlling thereof |
| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
-
1994
- 1994-12-14 JP JP6310216A patent/JPH08166828A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101068892B1 (en) * | 2009-09-30 | 2011-09-30 | 한국전력공사 | Static var compensator and method for controlling thereof |
| JP2011211803A (en) * | 2010-03-29 | 2011-10-20 | Mitsubishi Electric Corp | Control device for power system stabilization device |
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