JPS5932397A - Compensator for voltage drop of line - Google Patents

Compensator for voltage drop of line

Info

Publication number
JPS5932397A
JPS5932397A JP57139844A JP13984482A JPS5932397A JP S5932397 A JPS5932397 A JP S5932397A JP 57139844 A JP57139844 A JP 57139844A JP 13984482 A JP13984482 A JP 13984482A JP S5932397 A JPS5932397 A JP S5932397A
Authority
JP
Japan
Prior art keywords
voltage
circuit
compensation
signal
deviation
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
Application number
JP57139844A
Other languages
Japanese (ja)
Inventor
Kazusane Nishida
西田　和実
Shinichiro Inoue
真一郎 井上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP57139844A priority Critical patent/JPS5932397A/en
Publication of JPS5932397A publication Critical patent/JPS5932397A/en
Pending legal-status Critical Current

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)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

PURPOSE:To compensate voltage with high reliability by adding a compensating voltage signal corresponding to deviation between the output voltage of a reverse droop circuit detecting the voltage of a generator and set voltage to set voltage. CONSTITUTION:The reverse droop circuit 24 is connected to the main circuit of the generator 10 through a current transformer 20 and a transformer 22 for a meter. An analog computing element 26 outputs deviation between the output voltage of the reverse droop circuit 24 and a voltage set signal inputted to an automatic voltage regulator 18. An analog comparator 28 excites a relay 30 when a deviation signal is positive, and excites a relay 32 when the signal is negative. A digital setter 34 outputs a line voltage-drop compensating signal increasing or decreasing in response to the operation of excitation of the relays 30, 32. An analog computing element 40 adds a set voltage signal from a voltage setter 42 and the line voltage-drop compensating signal, and transmits the value over the automatic voltage regulator 18 as a voltage set signal.

Description

【発明の詳細な説明】 この発明は、送電線等の線路における電圧降下を補償す
るための装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for compensating for voltage drops in lines such as power transmission lines.

一般に、発電機に接続される送電線が長い場合、送電線
のインピーダンスにより負荷端の電圧が定格より降下す
ることがある。従来、この種の線路電圧の降下を補償す
るため、例えば電圧補償信号により直接発電機の励磁制
御装置の設定器における設定値を増減させることを行っ
ている。しかしながら、このような補償手段によれば、
常時設定器はその設定値が高い状態にあるため、負荷遮
断時の電圧上昇が大きくなる難点がある。Generally, when a power transmission line connected to a generator is long, the voltage at the load end may drop below the rated value due to the impedance of the transmission line. Conventionally, in order to compensate for this kind of line voltage drop, for example, a voltage compensation signal is used to directly increase or decrease a setting value in a setting device of an excitation control device of a generator. However, according to such compensation measures,
Since the setting value of the setting device is always high, there is a drawback that the voltage rise becomes large when the load is cut off.

そこで、本発明者等は、前述した従来の線路電圧降下補
償装置の問題点を見服すべく種々検討を重ねた結果１発
電機の励磁回路に自動電圧調整装置を介して電圧設定器
を設けると共に、発電機の電圧を検出する逆ドループ回
路を設け、この逆ドループ回路の出力電圧と前記電圧設
定器による設定電圧との偏差を演算し、次いでこの偏差
の正負状態を判別して偏差の正負状態に応じて増加また
け減少すべき補償電圧信号を発生１−５この補償電圧信
号を前記電圧設定器の設定室ｆＥ　１４号に加算するこ
とにより、電圧設定器の設定電圧値を高く設定すること
なく、従って負荷遮断時の電圧上昇も防止することがで
き。Therefore, the inventors of the present invention conducted various studies to solve the problems of the conventional line voltage drop compensator described above, and as a result, they installed a voltage setter in the excitation circuit of the generator via an automatic voltage regulator. At the same time, a reverse droop circuit is provided to detect the voltage of the generator, and the deviation between the output voltage of this reverse droop circuit and the voltage set by the voltage setting device is calculated, and then the positive or negative state of this deviation is determined. Generates a compensation voltage signal that should be increased or decreased depending on the state 1-5 By adding this compensation voltage signal to the setting chamber fE No. 14 of the voltage setting device, the set voltage value of the voltage setting device is set high. Therefore, it is possible to prevent voltage rise during load shedding.

前記問題点を解消し得ることを突き止めた。It has been found that the above problems can be solved.

従って、本発明の目的は、簡単な回路構成により、負荷
遮断時等における電圧上昇を有効に防止し信頼性の高い
電圧補償を行うことができる線路電圧降下＋＋Ｉ償装置
を提供するにある。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a line voltage drop ++I compensation device that can effectively prevent voltage increases during load cut-off and perform highly reliable voltage compensation with a simple circuit configuration.

前記の目的を達成するため、本発明においては、発電機
の励磁回路に自動電圧調整装置を介して電圧設定器を設
け、この電圧設定器の設定電圧に基づいて発を機の励磁
制御を行うよう構成した線路電圧降下補償装置において
、発電機の電圧を検出する逆ドループ回路を設け、この
逆ドループ回路の出力電圧と電圧設定器による設定電圧
との偏差を演算すると共にこの偏差の正負状態を判別し
かつこの偏差の正負状態に応じて補償電圧信号を発生し
てこれを前記電圧設定器の設定電圧信号に加算する補償
回路を設け、この補償回路によって補償された電圧設定
器の設定電圧を自動電圧調整装置に入力するよう構成す
ることを特徴とする。In order to achieve the above object, in the present invention, a voltage setting device is provided in the excitation circuit of the generator via an automatic voltage regulator, and excitation control of the generator is performed based on the set voltage of the voltage setting device. In the line voltage drop compensator configured as above, a reverse droop circuit is provided to detect the voltage of the generator, and the deviation between the output voltage of the reverse droop circuit and the voltage set by the voltage setting device is calculated, and the sign or negative state of this deviation is determined. A compensation circuit is provided which determines the deviation and generates a compensation voltage signal according to the positive/negative state of this deviation and adds it to the setting voltage signal of the voltage setting device, and the setting voltage of the voltage setting device compensated by this compensation circuit is provided. It is characterized in that it is configured to be input to an automatic voltage regulator.

前記の線路電圧降下補償装置において、補償回路の一部
に発電機の主回路に接続した遮断器と連動して回路の開
放を行う接点を設けることにより、負荷遮断時に補償回
路を無効にし発電機の電圧上昇を有効に防止することが
できる。In the line voltage drop compensator described above, by providing a contact in a part of the compensation circuit that opens the circuit in conjunction with the circuit breaker connected to the main circuit of the generator, the compensation circuit is disabled when the load is cut off, and the generator voltage rise can be effectively prevented.

また、発電機の電圧検出点に過電圧リレーを設け、この
過電圧リレーの作動により補償回路をロックするよう構
成することにより、過補償を有効に防止することができ
る。In addition, over-compensation can be effectively prevented by providing an over-voltage relay at the voltage detection point of the generator and configuring the compensation circuit to be locked by the operation of this over-voltage relay.

さらに、補償回路は、逆ドループ回路の出力電圧と設定
電圧との偏差を演算するアナログ演算器と、このアナロ
グ演算器の偏差出力の正負状態を判別してそれぞれ対応
するリレーを励磁するアナログ比較器と、前記各リレー
の動作に基づいて増加または減少すべき補償電圧信号を
発生するディジタル設定器と、とのディジタル設定器の
補償電圧信号と電圧設定器の設定電圧信号とを加算する
アナログ演算器とから構成すれば好適である。Furthermore, the compensation circuit includes an analog computing unit that computes the deviation between the output voltage of the reverse droop circuit and the set voltage, and an analog comparator that determines the positive or negative state of the deviation output of this analog computing unit and excites the corresponding relays. and a digital setting device that generates a compensation voltage signal to be increased or decreased based on the operation of each of the relays, and an analog computing device that adds the compensation voltage signal of the digital setting device and the set voltage signal of the voltage setting device. It is preferable if it is composed of the following.

次に、本発明に係るｌｌｌｌｌ回路電圧降下補償装置の
実施例につき、添付図面を参照しながら以下詳細に説明
する。Next, embodiments of the llllll circuit voltage drop compensator according to the present invention will be described in detail below with reference to the accompanying drawings.

第１図は本発明装置の一実施例を示す回路図である。す
なわち、第１図において、参照符号１０は発電機を示し
、この発電機１０は励磁用変圧器１２、サイリスタ１４
および励磁コイル１６を介して励磁制御される。この場
合、サイリスタ１４は、後述するように自動電圧調整装
置（ＡＶ几）１日により点弧位相角が制御されて励磁電
圧の調整を行う。一方、発電機１０の主回路には、変流
器２０および計器用変圧器２２を介して逆ドループ回路
２４を接続し、この逆ドループ回路２４で得られた電圧
信号をアナログ演算器２６に入力するよう構成する。こ
のアナログ演算器２６には、後述する自動電圧調整装置
ｉ１８に入力する電圧設定信号を入力し、前記逆ドルー
プ回路２４で得られた電圧信号との偏差を演算する。こ
のようにして得られたアナログ演算器２６の偏差出力は
アナログ比較器２８に入力され、このアナログ比較器２
８は、前記入力偏差信号が正の場合にリレー６０を励磁
し。FIG. 1 is a circuit diagram showing an embodiment of the device of the present invention. That is, in FIG. 1, reference numeral 10 indicates a generator, and this generator 10 includes an excitation transformer 12 and a thyristor 14.
Excitation is controlled via the excitation coil 16. In this case, the ignition phase angle of the thyristor 14 is controlled by an automatic voltage regulator (AV) to adjust the excitation voltage, as will be described later. On the other hand, a reverse droop circuit 24 is connected to the main circuit of the generator 10 via a current transformer 20 and an instrument transformer 22, and the voltage signal obtained by this reverse droop circuit 24 is input to an analog calculator 26. Configure it to do so. A voltage setting signal to be input to an automatic voltage regulator i18, which will be described later, is input to this analog calculator 26, and the deviation from the voltage signal obtained by the reverse droop circuit 24 is calculated. The deviation output of the analog computing unit 26 obtained in this way is input to the analog comparator 28.
8 excites the relay 60 when the input deviation signal is positive.

また前記入力偏差信号が負の場合にリレー６２を励磁す
るよう構成される。また、前記リレー３０．３２の励磁
動作を入力とするディジタル設定器６４を設ける。この
ディジタル設定器６４は、前記リレー３０．３２の励磁
動作に対応して設定電圧の増大または減少させる線路電
圧降下補償のための電圧信号を出力する。Further, the relay 62 is configured to be energized when the input deviation signal is negative. Further, a digital setting device 64 is provided which receives the excitation operation of the relays 30 and 32 as input. This digital setter 64 outputs a voltage signal for line voltage drop compensation that increases or decreases the set voltage in response to the excitation operation of the relays 30, 32.

そこで、前記ディジタル設定器６４で出力される電圧信
号は、発電機１０の主回路に設けた遮断器６６と連動す
る接点６８を介してアナログ演算器４０へ電圧設定器４
２の設定電圧信号と共に入力する。この結果、アナログ
演算器４０で出力される信号は、前記自動電圧調整装置
１８およびアナログ演算器２６へ供給する電圧設定信号
となる。Therefore, the voltage signal output from the digital setting device 64 is sent to the analog computing device 40 via a contact 68 that is linked to a circuit breaker 66 provided in the main circuit of the generator 10.
Input together with the setting voltage signal of 2. As a result, the signal output from the analog computing unit 40 becomes a voltage setting signal to be supplied to the automatic voltage regulator 18 and the analog computing unit 26.

次に、前述した回路構成からなる本発明装置の動作につ
き説明する。Next, the operation of the apparatus of the present invention having the above-described circuit configuration will be explained.

まず、前記回路において、逆ドループ回路２４の比率を
、補償するための線路電圧降下比率と一致させる。この
結果、発電機１００発生する電流により見掛は上負荷端
の電圧降下と同等の電圧をアナログ＠算器２６の入力と
するととができる。この時、自動電圧調整装置１Ｂへ供
給される電圧設定信号と比較し、その偏差が正であｎば
ｊｌｌ／−１０が励磁され、ディジタル設定器６４の設
定値が増加し、この増加された設定値が電圧設定器４２
の設定値に付加され、見掛は上電圧設定器４２の設定値
が増加されることになる。すなわち、自動電圧調整装置
１Ｂに供給される電圧設定ｆｆ１号は、電圧設定器４２
の設定値に線路電圧降下比率分の設定値を加算した値と
なり、これにより自動電圧調整装置１８を介して発電機
１０の励磁が強められて線路電圧の降下が補償される。First, in the circuit, the ratio of the reverse droop circuit 24 is made to match the line voltage drop ratio for compensation. As a result, a voltage apparently equivalent to the voltage drop at the upper load end due to the current generated by the generator 100 can be input to the analog calculator 26. At this time, it is compared with the voltage setting signal supplied to the automatic voltage regulator 1B, and if the deviation is positive, jll/-10 is excited and the set value of the digital setting device 64 is increased. The set value is the voltage setting device 42
The set value of the upper voltage setter 42 is apparently increased. That is, the voltage setting ff1 supplied to the automatic voltage regulator 1B is the voltage setting device 42.
The value is obtained by adding the set value for the line voltage drop ratio to the set value of , and thereby the excitation of the generator 10 is strengthened via the automatic voltage regulator 18 to compensate for the line voltage drop.

７− また、前記実施例回路において、発電機１０の主回路に
おける電圧検出点に過電圧リレーを設置し、この過電圧
リレーの動作に際しアナログ演算器２６以降の補償回路
をロックするよう構成すれば、補償回路による過補償を
防止することができる。7- Furthermore, in the circuit of the above embodiment, if an overvoltage relay is installed at the voltage detection point in the main circuit of the generator 10, and the compensation circuit after the analog computing unit 26 is locked when the overvoltage relay operates, the compensation can be achieved. Overcompensation by the circuit can be prevented.

前述した実施例から明らかなように、本発明によれば、
電圧設定器によシ自動電圧調整装置の電圧値を直接増減
することなく、電圧設定器の設定信号に補償信号をバイ
アスする方式であり、また負荷遮断時に接点３８を開放
することにより前記バイアス補償信号を瞬時に除外して
いるため、負荷遮断後の電圧上昇を防止し、線路電圧降
下の補償を有効に達成することができる。As is clear from the embodiments described above, according to the present invention,
This method biases the compensation signal to the setting signal of the voltage setting device without directly increasing or decreasing the voltage value of the automatic voltage regulator using the voltage setting device, and the bias compensation is performed by opening the contact 38 when the load is cut off. Since the signal is removed instantly, voltage rise after load shedding can be prevented and line voltage drop compensation can be effectively achieved.

以上、本発明の好適な実施例について説明したが、本発
明の精神を逸脱しない範囲内において種々の設計変更を
なし得ることは勿論である。Although the preferred embodiments of the present invention have been described above, it goes without saying that various design changes can be made without departing from the spirit of the present invention.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明に係る線路電圧降下補償装置−９−１へ
へ ８− １０・・・発　電　機　　１２・・・励磁用変圧器１４
・・・ザイリスタ　１６・・・励磁コイル１８・・・自
動電圧！！＋４！Ｉ装置　２０・・・変　　流　　器２
２・・・計器用貸圧器　　２４・・・逆ドループ回路２
６・・・アナログ演算器　　２８・・・アナログ比較器
３０　・・・　　リ　　　　　　し　　　　　−　　　
　　　３２　・・・　　リ　　　　　　し　　　　　−
３４・・・ディジタル設定器　５６・・・逍　　断　　
器３８・・・接　　　　　点　　４０・・・アナログ演
算器４２・・・電圧設定器 １０−FIG. 1 shows the line voltage drop compensator according to the present invention-9-1 to 8-10...generator 12...excitation transformer 14
...Zyristor 16...Exciting coil 18...Automatic voltage! ! +4! I device 20...Current transformer 2
2... Instrument pressure lender 24... Reverse droop circuit 2
6... Analog computing unit 28... Analog comparator 30... Re -
32 ... ri -
34... Digital setting device 56... End
Device 38...Contact 40...Analog calculator 42...Voltage setting device 10-

Claims (1)

【特許請求の範囲】 （１）発電機の励磁回路に自動電圧１１整装置を介して
電圧設定器を設け、この電圧設定器の設定電圧に基づい
て発電機の励磁制御を行うよう構成した線路電圧降下補
償装置において、発電機の電圧を検出する逆ドループ回
路を設け、この逆ドループ回路の出力電圧と電圧設定器
による設定電圧との偏差を演算すると共にこの偏差の正
負状態を判別しかつこの偏差の正負状態に応じて補償電
圧信号を発生してこれを前記電圧設定器の設定電圧信号
に加算する補償回路を設け、この補償回路によって補償
された電圧設定器の設定電圧を自動電圧調整装置に入力
するよう構成することを特徴とする線路電圧降下補償装
置。 （２、特許請求の範囲第１項記載の線路電圧降下補償装
置において、補償回路の一部に発電機の主回路に接続し
た逍断器と連動して回路の開放を行う接点を設けてなる
線路電圧降下補償装置。 （３）特許請求の範囲ｗＥ１項記載の線路電圧降下補償
装置において、発電機の電圧検出点に過電圧リレーを設
け、この過電圧リレーの作動により補償回路をロックす
るよう構成してなる線路電圧降下補償装置。 （４）特許請求の範囲第１項乃至第６項のいずれかに記
載の線路電圧降下補償装置において、補償回路は、逆ド
ループ回路の出力電圧と設定電圧との偏差を演算するア
ナログ演算器と。 このアナログ演算器の偏差出力の正負状態を判別してそ
れぞれ対応するリレーを励磁するアナログ比較器と、前
記各リレーの動作に基づいて増加ま九は減少すべき補償
電圧信号を発生するディジタル設定器と、とのディジタ
ル設定器の補償電圧信号と電圧設定器の設定電圧信号と
を加算するアナログ演算器とから構成してなる線路電圧
降下補償装置。[Claims] (1) A line configured to provide a voltage setting device in the excitation circuit of the generator via an automatic voltage adjustment device, and to perform excitation control of the generator based on the set voltage of the voltage setting device. A voltage drop compensator is provided with a reverse droop circuit that detects the voltage of the generator, and calculates the deviation between the output voltage of this reverse droop circuit and the voltage set by the voltage setting device, and also determines whether this deviation is positive or negative. The automatic voltage regulator includes a compensation circuit that generates a compensation voltage signal according to the positive or negative state of the deviation and adds it to the set voltage signal of the voltage setter, and the set voltage of the voltage setter compensated by the compensation circuit. A line voltage drop compensator characterized in that it is configured to input. (2. In the line voltage drop compensator according to claim 1, a contact point is provided in a part of the compensation circuit to open the circuit in conjunction with a disconnector connected to the main circuit of the generator. Line voltage drop compensation device. (3) In the line voltage drop compensation device according to claim wE1, an overvoltage relay is provided at the voltage detection point of the generator, and the compensation circuit is configured to be locked by the operation of the overvoltage relay. (4) In the line voltage drop compensator according to any one of claims 1 to 6, the compensation circuit is configured to compensate for the difference between the output voltage of the reverse droop circuit and the set voltage. An analog computing unit that calculates the deviation.An analog comparator that determines the positive/negative status of the deviation output of this analog computing unit and excites the corresponding relays.Based on the operation of each of the relays, the increase or decrease should be made. A line voltage drop compensation device comprising a digital setting device that generates a compensation voltage signal, and an analog computing unit that adds the compensation voltage signal of the digital setting device and the setting voltage signal of the voltage setting device.
JP57139844A 1982-08-13 1982-08-13 Compensator for voltage drop of line Pending JPS5932397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57139844A JPS5932397A (en) 1982-08-13 1982-08-13 Compensator for voltage drop of line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57139844A JPS5932397A (en) 1982-08-13 1982-08-13 Compensator for voltage drop of line

Publications (1)

Publication Number Publication Date
JPS5932397A true JPS5932397A (en) 1984-02-21

Family

ID=15254831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57139844A Pending JPS5932397A (en) 1982-08-13 1982-08-13 Compensator for voltage drop of line

Country Status (1)

Country Link
JP (1) JPS5932397A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108092271A (en) * 2017-12-15 2018-05-29 河南工业职业技术学院 Phase three-wire three series type dynamic voltage compensation device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108092271A (en) * 2017-12-15 2018-05-29 河南工业职业技术学院 Phase three-wire three series type dynamic voltage compensation device
CN108092271B (en) * 2017-12-15 2018-09-28 河南工业职业技术学院 Phase three-wire three series type dynamic voltage compensation device

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