JPS6367411B2 - - Google Patents
Info
- Publication number
- JPS6367411B2 JPS6367411B2 JP59068995A JP6899584A JPS6367411B2 JP S6367411 B2 JPS6367411 B2 JP S6367411B2 JP 59068995 A JP59068995 A JP 59068995A JP 6899584 A JP6899584 A JP 6899584A JP S6367411 B2 JPS6367411 B2 JP S6367411B2
- Authority
- JP
- Japan
- Prior art keywords
- valve
- thyristor
- converter
- arrester
- bypass pair
- 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.)
- Expired
Links
- 238000000034 method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims 2
- 230000000903 blocking effect Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Rectifiers (AREA)
- Power Conversion In General (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、高圧サイリスタ変換器のバイパスペ
ア運転時におけるサイリスタバルブ１アームパル
ス欠相事故による過電圧からのサイリスタバルブ
を保護出来るサイリスタ変換器の保護方法に関す
る。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a method for protecting a thyristor converter that can protect a thyristor valve from overvoltage caused by a thyristor valve one-arm pulse open-phase accident during bypass pair operation of a high-pressure thyristor converter. Regarding.
高圧サイリスタ変換器において、バイパスペア
運転時に、サイリスタバルブ１アームパルス欠相
事故が発生すると、パルス欠相発生サイリスタバ
ルブには、ほぼ変換器の直流出力電圧程度の過電
圧が加わり、パルス欠相サイリスタバルブと120゜
位相の異なるサイリスタバルブには、ほぼ変換器
の直流出力電圧＋変換器トランス２次側線間電圧
程度の過電圧が加わり、これらの過電圧は、バル
ブ保護レベルを越えるので、バルブを破壊する可
能性があつた。
In a high-voltage thyristor converter, when a thyristor valve 1 arm pulse open-phase accident occurs during bypass pair operation, an overvoltage approximately equal to the DC output voltage of the converter is applied to the pulse-open thyristor valve, and the pulse open-phase thyristor valve An overvoltage approximately equal to the DC output voltage of the converter + the line voltage on the secondary side of the converter transformer is applied to the thyristor valve with a 120° phase difference between the thyristor valve and the thyristor valve.These overvoltages exceed the valve protection level and may destroy the valve. The sex was hot.
本発明の目的は、高圧変換器がバイパスペア運
転時にサイリスタバルブ１アームパルス欠相事故
を生じると、ただちにこれを検出し、変換器の運
転を停止することにより、サイリスタバルブを過
電圧から保護することが出来るサイリスタ変換器
の保護方法を提供することにある。
The purpose of the present invention is to protect the thyristor valve from overvoltage by immediately detecting a thyristor valve 1 arm pulse open phase accident in a high voltage converter during bypass pair operation and stopping the converter operation. The object of the present invention is to provide a method of protecting a thyristor converter that can protect the thyristor converter.
本発明は、この目的を達成するために、バイパ
スペア運転期間中に少なくとも１アーム以上のア
レスタに所定値以上の電流が流れたことを検出し
た際にサイリスタ変換器を停止させるようにした
ことを特徴とするものである。
In order to achieve this object, the present invention is configured to stop the thyristor converter when it is detected that a current exceeding a predetermined value flows through at least one arrester arm during the bypass pair operation period. This is a characteristic feature.
以下本発明について第１図を用いて説明する。
第１図は本発明を、６パルスサイリスタ変換器に
応用した例である。バルブのアレスタ電流の検出
は、サイリスタバルブ１に並列に接続されたバル
ブのアレスタ２に直列に接続された整流回路３に
より、アレスタ電流を整流し、発光素子５には通
電させることにより発光素子５を発光させて行
う。発光素子５から放射された光は、ライトガイ
ド６を通り、光電変換素子７に導びかれ、電気信
号に変換され、増幅回路８により増幅された後、
OR回路９へ伝送される。OR回路９は、６パル
スサイリスタ変換器のすべてのサイリスタバルブ
のアレスタ電流検出信号の論理和をとることによ
り、バルブのアレスタ電流あり信号ａを作る。
The present invention will be explained below with reference to FIG.
FIG. 1 shows an example in which the present invention is applied to a 6-pulse thyristor converter. The arrester current of the bulb is detected by rectifying the arrester current by a rectifier circuit 3 connected in series with the arrester 2 of the bulb connected in parallel to the thyristor bulb 1, and by supplying current to the light emitting element 5. This is done by emitting light. The light emitted from the light emitting element 5 passes through the light guide 6, is guided to the photoelectric conversion element 7, is converted into an electric signal, and is amplified by the amplifier circuit 8.
It is transmitted to the OR circuit 9. The OR circuit 9 generates a valve arrester current presence signal a by ORing the arrester current detection signals of all the thyristor valves of the 6-pulse thyristor converter.
バルブのアレスタ電流あり信号ａとバルブ制御
盤１１からのバイパスペア指令信号ｂの論理積を
AND回路１０で行うことにより、バルブ停止指
令信号ｃを作り、この信号をバルブ制御盤１１に
導いている。 The AND of the valve arrester current signal a and the bypass pair command signal b from the valve control panel 11 is calculated.
By performing this in the AND circuit 10, a valve stop command signal c is generated and this signal is guided to the valve control panel 11.
電流制限抵抗１２は、発光素子５に過電流が流
れることを防止するためのバイパス用低抵抗であ
る。 The current limiting resistor 12 is a low bypass resistor for preventing overcurrent from flowing into the light emitting element 5.
第１図において何らかの原因により、バイパス
ペア運転時に１アームパルブ欠相事故が例えがバ
ルブ１−Ｙに発生すると、最初にバルブ１−Ｚに
過電圧が発生し、バルブのアレスタ２−Ｚにアレ
スタ電流が流れる。このアレスタ電流は、整流回
路３−Ｚを通つて発光素子５−Ｚを流れることに
より、所定以上の電流ならば発光素子５−Ｚを発
光させる。発光素子５−Ｚより放射された光はラ
イトガイド６−Ｚを通り、光電変換素子７−Ｚに
導びかれ電気信号となり増幅回路８−Ｚを通り、
OR回路９に入力され、OR回路９の出力にアレ
スタ電流あり信号ａが発生する。バイパスペア運
転時なのでバルブ制御盤１１からのバイパスペア
指令信号ｂも出力される。従つて、AND回路１
０の出方であるバルブ停止指令信号ｃが真とな
り、バルブ制御盤１１に入力され、サイリスタ変
換器がすみやかに停止することにより、サイリス
タバルブ１−Ｚの過電圧は、保護レベル以上にな
ることなく、減少し、サイリスタバルブ１−Ｚは
保護される。 In Figure 1, if a 1-arm valve open-phase accident occurs in valve 1-Y for some reason during bypass pair operation, overvoltage will first occur in valve 1-Z, and arrester current will flow in valve arrester 2-Z. flows. This arrester current flows through the light emitting element 5-Z through the rectifier circuit 3-Z, and causes the light emitting element 5-Z to emit light if the current exceeds a predetermined value. The light emitted from the light emitting element 5-Z passes through the light guide 6-Z, is guided to the photoelectric conversion element 7-Z, becomes an electric signal, passes through the amplifier circuit 8-Z,
It is input to the OR circuit 9, and an arrester current presence signal a is generated at the output of the OR circuit 9. Since the bypass pair operation is being performed, the bypass pair command signal b from the valve control panel 11 is also output. Therefore, AND circuit 1
The valve stop command signal c, which is the output of 0, becomes true and is input to the valve control panel 11, and the thyristor converter immediately stops, so that the overvoltage of the thyristor valve 1-Z does not exceed the protection level. , decreases and the thyristor valve 1-Z is protected.
また、バイパスペア運転時に事故がなく過電圧
が発生しない場合は、アレスタ電流が流れないの
で、アレスタ電流あり信号ａは偽となり、バルブ
停止指令信号ｃも偽となるので、無用のバルブ停
止保護をかけることはない。さらに雷、開閉サー
ジ等による過電圧によりバルブアレスタ電流が流
れても、バイパスペア運転時でなければ、バイパ
スペア指令信号ｂが偽であるので、バルブ停止指
令信号ｃは偽であり、無用のバルブ停止は行なわ
ない。 In addition, if there is no accident and no overvoltage occurs during bypass pair operation, the arrester current will not flow, so the arrester current presence signal a will be false, and the valve stop command signal c will also be false, so unnecessary valve stop protection is applied. Never. Furthermore, even if the valve arrester current flows due to overvoltage caused by lightning, switching surge, etc., unless the bypass pair is in operation, the bypass pair command signal b is false, so the valve stop command signal c is false, and the valve is stopped unnecessarily. will not be carried out.
以上の様に本発明によれば、バイパスペア運転
時に、サイリスタバルブ１アームパルス欠相事故
がいずれのアームに発生した場合でも、これをた
だちに検出し、バルブを停止することにより、バ
ルブ過電圧を保護レベル以下におさえ、バルブを
保護することができる。
As described above, according to the present invention, even if a thyristor valve 1 arm pulse open phase accident occurs in either arm during bypass pair operation, this is immediately detected and the valve is stopped, thereby protecting the valve overvoltage. It is possible to protect the valve by keeping it below this level.
第１図は本発明の一実施例を示す構成図であ
る。
１……サイリスタバルブ、２……バルブアレス
タ、３……整流回路、４……抵抗、５……発光素
子、６……ライトガイド、７……光電変換素子、
８……増幅回路、９……OR回路、１０……AND
回路、１１……バルブ制御盤、１２……電流制限
抵抗、ａ……バイパスペア指令信号、ｂ……アレ
スタ電流あり信号、ｃ……バルブ停止指令信号。
FIG. 1 is a block diagram showing an embodiment of the present invention. 1... Thyristor valve, 2... Valve arrester, 3... Rectifier circuit, 4... Resistor, 5... Light emitting element, 6... Light guide, 7... Photoelectric conversion element,
8...Amplification circuit, 9...OR circuit, 10...AND
Circuit, 11... Valve control panel, 12... Current limiting resistor, a... Bypass pair command signal, b... Signal with arrester current, c... Valve stop command signal.
Claims (1)
れてなるサイリスタ変換器において、前記アレス
タに直列に全波整流回路を接続し、この全整流回
路の直流端子間に抵抗器及び発光ダイオードを設
け、該発光ダイオードの光信号をライトガイドを
介して大地側に導入し、前記光信号が有ること及
び前記サイリスタ変換器をバイパスペア運転する
ためのバイパスペア指令信号が出されていること
の条件で前記サイリスタ変換器へのゲート信号を
ブロツクするようにしたこことこを特徴とするサ
イリスタ変換器の保護方法。1. In a thyristor converter in which each arm is provided with an arrester in parallel, a full-wave rectifier circuit is connected in series with the arrester, a resistor and a light-emitting diode are provided between the DC terminals of this full-wave rectifier circuit, and the light-emitting The optical signal of the diode is introduced to the ground side via a light guide, and the thyristor converter is converted under the conditions that the optical signal is present and a bypass pair command signal for operating the thyristor converter as a bypass pair is issued. A method for protecting a thyristor converter, which is characterized by blocking the gate signal to the converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6899584A JPS60213219A (en) | 1984-04-09 | 1984-04-09 | Method of protecting thyristor converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6899584A JPS60213219A (en) | 1984-04-09 | 1984-04-09 | Method of protecting thyristor converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60213219A JPS60213219A (en) | 1985-10-25 |
| JPS6367411B2 true JPS6367411B2 (en) | 1988-12-26 |
Family
ID=13389747
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6899584A Granted JPS60213219A (en) | 1984-04-09 | 1984-04-09 | Method of protecting thyristor converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60213219A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01116112U (en) * | 1988-01-29 | 1989-08-04 | ||
| JPH043910U (en) * | 1990-04-23 | 1992-01-14 | ||
| JPH0659207U (en) * | 1993-01-26 | 1994-08-16 | 北海製罐株式会社 | Biaxially stretched polyethylene terephthalate bottle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115371A (en) * | 1974-07-02 | 1976-02-06 | Gosudarusutoennui N Isuredowaa | |
| JPS5851771A (en) * | 1981-09-22 | 1983-03-26 | Kansai Electric Power Co Inc:The | Thyristor protecting system |
-
1984
- 1984-04-09 JP JP6899584A patent/JPS60213219A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5115371A (en) * | 1974-07-02 | 1976-02-06 | Gosudarusutoennui N Isuredowaa | |
| JPS5851771A (en) * | 1981-09-22 | 1983-03-26 | Kansai Electric Power Co Inc:The | Thyristor protecting system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01116112U (en) * | 1988-01-29 | 1989-08-04 | ||
| JPH043910U (en) * | 1990-04-23 | 1992-01-14 | ||
| JPH0659207U (en) * | 1993-01-26 | 1994-08-16 | 北海製罐株式会社 | Biaxially stretched polyethylene terephthalate bottle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60213219A (en) | 1985-10-25 |
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