JPS592530A - Control system for converter - Google Patents

Control system for converter

Info

Publication number
JPS592530A
JPS592530A JP57109531A JP10953182A JPS592530A JP S592530 A JPS592530 A JP S592530A JP 57109531 A JP57109531 A JP 57109531A JP 10953182 A JP10953182 A JP 10953182A JP S592530 A JPS592530 A JP S592530A
Authority
JP
Japan
Prior art keywords
current
control
converter
circuit
transmission line
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.)
Granted
Application number
JP57109531A
Other languages
Japanese (ja)
Other versions
JPH0368620B2 (en
Inventor
堺 高見
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP57109531A priority Critical patent/JPS592530A/en
Publication of JPS592530A publication Critical patent/JPS592530A/en
Publication of JPH0368620B2 publication Critical patent/JPH0368620B2/ja
Granted legal-status Critical Current

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  • Direct Current Feeding And Distribution (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、周波数変換装置や直流送電設備の逆変換装置
において、その制御遅れ角の下限リミッタ値を各種事故
に応じて切替える為の変換装置の制御方式に関する。
[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a frequency conversion device or an inverse conversion device for DC power transmission equipment, which is used for switching the lower limit value of the control delay angle in response to various accidents. Regarding control method.

〔発明の技術的背景〕[Technical background of the invention]

第1図は、直流送電設備の概略図を示し1交流母、l1
li11,1′は変換用変圧器2,2′を介して、例え
ば多数個のサイリスタの直並列接続から成る変換器3.
3′に接続され、各サイリスタの点弧・位相を制御する
ことにより交流を直流に又は直流を交流に変換する。4
.4′は平滑リアクトル、5は直流送電線路、6,6′
は計器用変圧器(P−T)、7,7′は計器用変流器(
C−T)を示す。このような主回路構成における制御装
置は、定電流制御回路(ACR) s 、 s’及び定
電圧制御回路(AVR) 9 、9’等で構成されてい
る。
Figure 1 shows a schematic diagram of DC power transmission equipment.
The converter 3.li11,1' is connected to a converter 3.1, which is composed of a series-parallel connection of a large number of thyristors, for example, via the converting transformers 2,2'.
3', and converts alternating current into direct current or vice versa by controlling the firing and phase of each thyristor. 4
.. 4' is a smoothing reactor, 5 is a DC transmission line, 6, 6'
is a potential transformer (PT), 7, 7' is a potential current transformer (
CT). The control device in such a main circuit configuration includes constant current control circuits (ACR) s, s', constant voltage control circuits (AVR) 9, 9', and the like.

定電流制御回路、定電圧制御回路はそれぞれ基準値Id
p 、 Edpと検出値Id 、 Edとの偏差を制御
電圧Ecに変換し、この制御電圧Eeは制御電圧選択回
路10.10’に入力される@前記制御電圧選択回路1
 o 、 J 6’は各種制御のうちで制御角を一番進
める制御系を自動的に選択するものであり、ここで選択
された制御電圧Ecは、制御電圧リミッタ11 、11
’で上限、下限のリミッタをかけられた点弧位相制御回
路12゜12’に入力される。前記点弧位相制御回路1
2゜12′は制御電圧Ecに比例した点弧位相を決定し
てサイリスタに点弧指令を出力する・このようにして構
成され九交直変換装置では、周知のごとく、電流マージ
ン(ΔI)の切替により一方が順変換装置として定電流
制御により運転され、他方が逆変換装置として定電圧制
御によシ運転される。
The constant current control circuit and constant voltage control circuit each have a reference value Id.
The deviation between p, Edp and the detected values Id, Ed is converted into a control voltage Ec, and this control voltage Ee is input to the control voltage selection circuit 10.10'@the control voltage selection circuit 1
o, J6' is for automatically selecting the control system that advances the control angle the most among various controls, and the control voltage Ec selected here is the control voltage limiter 11, 11
The signal is input to the ignition phase control circuit 12°12' which is provided with upper and lower limiters at '. The ignition phase control circuit 1
2゜12' determines the firing phase proportional to the control voltage Ec and outputs the firing command to the thyristor.In the nine AC/DC converters configured in this way, as is well known, the current margin (ΔI) is switched. Accordingly, one is operated as a forward converter under constant current control, and the other is operated as an inverse converter under constant voltage control.

さて、このような構成において、いま変換器3を順変換
器、変換器3′を逆変換器とすれば、正規な運転中にお
いては、順変換器3は、前記定電流制御回路(以下、A
CRと略す。)8によって運転され、逆変換器3′は、
前記定電圧制御回路(以下、AVRと略す。)9′によ
って運転されている。
Now, in such a configuration, if the converter 3 is a forward converter and the converter 3' is an inverse converter, during normal operation, the forward converter 3 is connected to the constant current control circuit (hereinafter referred to as A
It is abbreviated as CR. ) 8 and the inverter 3' is
It is operated by the constant voltage control circuit (hereinafter abbreviated as AVR) 9'.

従来の逆変換器側の制御装置では、制御遅れ角(以下、
αと略す。)が、電気角で90°と1600の範囲に制
限されている。即ち、前記制御電圧リミッタ11′によ
って90’≦α≦1600に制限されている。尚、順変
換器側では、前記制御電圧リミッタ11によって、10
0≦α≦120゜に制限されている・逆変換器側におい
てα≧906と制限している理由は、ACR−?AVR
等の回路故障によって、逆変換器3′が順変換器運転す
ることを防止する為である。
In conventional inverter-side control devices, the control delay angle (hereinafter referred to as
It is abbreviated as α. ) is limited to a range of 90 degrees and 1600 degrees in electrical angle. That is, it is limited to 90'≦α≦1600 by the control voltage limiter 11'. Incidentally, on the forward converter side, the control voltage limiter 11
It is limited to 0≦α≦120°・The reason why it is limited to α≧906 on the inverse converter side is ACR-? AVR
This is to prevent the reverse converter 3' from operating as a forward converter due to a circuit failure such as the above.

〔背景技術の問題点〕[Problems with background technology]

さて、この状態で、前記直流送電線5に地絡が発生する
と、順変換器3.及び逆変換器3′側の直流電圧はほぼ
零となるが、直流電流に関しては、順変換器3側は電流
設定値相当分の電流が流れるが、逆変換器3′側の電流
はほぼ零となる。従って、このような状態では、 (1)逆変換器3′の電流が断続してサイリスタ素子の
劣化を招く恐れがある。
Now, in this state, if a ground fault occurs in the DC transmission line 5, the forward converter 3. And the DC voltage on the reverse converter 3' side becomes almost zero, but regarding the DC current, a current equivalent to the current setting value flows on the forward converter 3 side, but the current on the reverse converter 3' side is almost zero. becomes. Therefore, in such a state, (1) the current of the inverter 3' may be intermittent, leading to deterioration of the thyristor element.

(2)地絡点に電流設定値相当分、例えば定格電流が流
れるので、地絡時のアークが消滅しにくい。
(2) Since an amount equivalent to the current setting value, for example, the rated current, flows through the ground fault point, the arc at the time of a ground fault is difficult to extinguish.

等の問題点がある。この原因は、制御電圧リミッタ11
′がα≧90’となっている為である。即ち、地絡が発
生すると、逆変換器3′側では、ACR8’の出力が選
択されて、電流設定値から電流マー2771分を差し引
いた値に相当する直流電流を流そうとするが、制御電圧
リミッタ11′によって、αが9便以下にならないよう
にリミッタがかけられているからである0 以上の説明は、直流送電線路で地絡が発生した場合の説
明であるが、順変換器3の交流母線1で地絡等が発生し
た場合にも同様な不具合が発生する。
There are other problems. The cause of this is the control voltage limiter 11
This is because ' is α≧90'. That is, when a ground fault occurs, the inverter 3' side selects the output of ACR8' and tries to flow a DC current corresponding to the value obtained by subtracting the current mark 2771 from the current setting value, but the control This is because the voltage limiter 11' limits α so that it does not become less than 9.0 The above explanation is for the case where a ground fault occurs in the DC transmission line, but A similar problem will occur if a ground fault or the like occurs on the AC bus 1.

従ってへ上記不具合を解決する為の容易に考え得る方法
は、上記制御電圧リミッタの下限リミッタ値をなくすこ
とであるが、このようにすると前述したごとく回路故障
等により両変換器とも順変換器運転となシ、大電流が流
れる。又、前記順変換器3の交流母線1で地絡等が発生
した場合について考えると、近年高速に再起動させる為
に、交流母線1で地絡が発生した場合には、交流不足電
圧リレー等でその事故を検出して、順変換器3をバイノ
4スペアに入れて、事故クリヤーと共に高速に再起動さ
せる方式が考えられているが、このような再起動方式を
採用した場合には、再起動時、交流系統に大きなしよう
乱を発生させる恐れがある。何故ならば、事故継続中、
即ち、順変換器3がノぐイノ母スペア期間中の直流電流
は、電流設定値から電流マージン分を差し引いた値、即
ち定格電流に近い値となっている為である。
Therefore, an easily conceivable way to solve the above problem is to eliminate the lower limiter value of the control voltage limiter, but if this is done, as mentioned above, both converters will be in forward converter operation due to circuit failure etc. Suddenly, a large current flows. Also, considering the case where a ground fault or the like occurs on the AC bus 1 of the forward converter 3, in recent years, in order to restart at high speed, when a ground fault occurs on the AC bus 1, an AC undervoltage relay, etc. A method is being considered in which the accident is detected, the forward converter 3 is placed in the bino 4 spare, and the accident is cleared and the system is restarted at high speed. When starting up, there is a risk of large disturbances occurring in the AC system. Because the accident continues,
That is, this is because the DC current during the spare period when the forward converter 3 is running is a value obtained by subtracting the current margin from the current setting value, that is, a value close to the rated current.

〔発明の目的〕[Purpose of the invention]

従って、本発明の目的は、このような欠点を除去する為
になされたものであって、直流送電線路事故発生時に、
地絡点に流れる電流を抑制するとともに逆変換器の電流
断続を防止し、交流送電線路事故発生時には、直流電流
を小さくして再起動時の交流系統に与えるしよう乱を抑
制し、更に回路故障等に伴う直流電流の増加を極力防止
する為の変換装置の制御方式を提供することにある。
Therefore, it is an object of the present invention to eliminate such drawbacks, and to solve the problem in the event of a DC transmission line accident.
It suppresses the current flowing to the ground fault point and prevents current interruption in the inverter, and in the event of an AC transmission line fault, it reduces the DC current to suppress disturbances to the AC system when restarting, and further prevents circuit failure. It is an object of the present invention to provide a control method for a converter device to prevent an increase in direct current caused by such factors as much as possible.

〔発明の概要〕[Summary of the invention]

この目的を達成する為に1本発明は、直流送電線路事故
、交流送電線路事故等によフ制御遅れ角下限リミッタを
切替えることを特徴とするものである。
In order to achieve this object, the present invention is characterized in that the control delay angle lower limiter is switched in response to a DC power transmission line fault, an AC power transmission line fault, or the like.

〔発明の実施例〕[Embodiments of the invention]

第2図は本発明の一実施例を示す制御電圧リミッタ回路
で、13e14g15は上下限リミッタ回路で、上限リ
ミ、り値はすべて同じ値であるが、下限リミッタ値につ
いては、例えば13は制御遅れ角α90’相当値、14
は制御遅れ角α85’相当値、15は制御遅れ角α70
”相当値である。又、16*17+18はスイッチで、
例えば16は通常運転中はオン、直流送電線路や交流送
電線路事故時オフするスイッチで、17は交流送電線路
事故時にのみオンするスイッチ、18は直流送電線路事
故時にのみオンするスイッチである@ さて、第2図において、通常運転中はスイッチ16がオ
ンしているので、制御電圧は、上下限リミッタ回路13
でリミッタがかけられるO即ち、定電圧制御回路等の故
障で例えばα=θ。
Fig. 2 shows a control voltage limiter circuit showing an embodiment of the present invention, 13e14g15 is an upper and lower limiter circuit, and the upper limit and limit value are all the same value, but for the lower limiter value, for example, 13 is a control delay limiter circuit. Angle α90' equivalent value, 14
is the control delay angle α85' equivalent value, 15 is the control delay angle α70
"This is the equivalent value. Also, 16*17+18 is a switch,
For example, 16 is a switch that is turned on during normal operation and turned off in the event of a DC or AC transmission line accident, 17 is a switch that is turned on only in the event of an AC transmission line accident, and 18 is a switch that is turned on only in the case of a DC transmission line accident. In FIG. 2, the switch 16 is on during normal operation, so the control voltage is controlled by the upper and lower limiter circuit 13.
A limiter is applied at O, that is, due to a failure in the constant voltage control circuit, etc., for example, α=θ.

相当の制御電圧となっても、上下限リミッタ回路13で
α=900相当の制御電圧となるので大きな電流が流れ
ることはない。又、交流送電線路事故等が発生した場合
には、その事故検出信号によりスイッチ17がオンする
ので、α=850相当の制御電圧となり、最小負荷電流
で運転されることになる。更に、直流送電線路故障が発
生した場合には、その事故検出信号によりスイッチ18
がオンするので、α=700相轟の制御電圧とな9定格
直流電流値に近い直流電流を流すことができる。
Even if the control voltage reaches a considerable level, the upper and lower limiter circuit 13 sets the control voltage to α=900, so that no large current flows. Further, when an AC power transmission line accident or the like occurs, the switch 17 is turned on by the accident detection signal, so that the control voltage becomes equivalent to α=850, and the system is operated at the minimum load current. Furthermore, when a DC transmission line fault occurs, the fault detection signal causes switch 18 to be activated.
is turned on, it is possible to flow a DC current close to the rated DC current value with a control voltage of α=700 phase.

上記の説明では、上下限リミ、り回路14゜15の下限
リミッタ値はそれぞれα=850相当値、α=700相
当値としたが、この値は直流送電線路抵抗値や最小負荷
電流或いは断続限界電流値等を考慮して決定されること
は云うまでもない@又、実際にはスイッチ17.18は
事故検出信号に連動させるのではなく、スイッチをオフ
させるときには、事故回復後多少の時間遅れをもって復
帰させる方が好ましい。
In the above explanation, the upper and lower limit limits and the lower limit value of the circuit 14 and 15 were set to values equivalent to α = 850 and α = 700, respectively, but these values are based on the DC transmission line resistance value, minimum load current, or intermittent limit. It goes without saying that the decision is made taking into consideration the current value, etc.@Also, in reality, switches 17 and 18 are not linked to the accident detection signal, but when turning off the switches, there is a slight delay after the accident has been recovered. It is preferable to return it with.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば、通常運転時、交
流送電線路事故時、直流送電線路事故時の各々の運転モ
ードに応じて、制御遅れ角リミッタの下限リミッタ値を
切替ることにより■ 回路故障等に伴なう拡大事故を防
止できる。
As explained above, according to the present invention, by switching the lower limit value of the control delay angle limiter according to each operation mode during normal operation, during an AC power transmission line fault, and during a DC power transmission line fault, Expanded accidents due to circuit failures, etc. can be prevented.

■ 直流送電線路地絡時に地絡点を流れる電流を゛・抑
制することができる。
■ It is possible to suppress the current flowing through the ground fault point in the event of a ground fault in the DC transmission line.

■ 交流系統事故時に、交流系統に与えるじょう乱を抑
制して高速再起動ができる。
■ In the event of an AC system accident, disturbances to the AC system can be suppressed and a rapid restart can be achieved.

と云う著しい効果を有する。It has a remarkable effect.

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

第1図は本発明を適用できる直流送電設備の概略構成図
、第2図は本発明の要部のみを示すブロック図である。 1.1′・・・交流母線、2,2′・・・変換用変圧器
、3.3′・・・変換器、4−4’・・・平滑リアクト
ル15・・・直流送電線路、6 e 6’・・・計器用
変圧器、7゜7′・・・計器用変流器、8 m B’・
・・定電流制御回路、9.9′・・・定電圧制御回路、
10910’・・・制御電圧選択回路、1lall’・
・・制御電圧リミッタ回路、12.12’・・・点弧位
相制御回路、J s *14*15・・・上下限リミッ
タ回路、16*17*1B・・・スイッチ0
FIG. 1 is a schematic configuration diagram of a DC power transmission facility to which the present invention can be applied, and FIG. 2 is a block diagram showing only the main parts of the present invention. 1.1'... AC bus, 2,2'... Conversion transformer, 3.3'... Converter, 4-4'... Smoothing reactor 15... DC transmission line, 6 e 6'...Instrument transformer, 7゜7'...Instrument current transformer, 8 m B'・
...constant current control circuit, 9.9'...constant voltage control circuit,
10910'...Control voltage selection circuit, 1lall'.
...Control voltage limiter circuit, 12.12'...Ignition phase control circuit, J s *14*15...Upper/lower limit limiter circuit, 16*17*1B...Switch 0

Claims (1)

【特許請求の範囲】[Claims] 交流を直流に、直流を交流に変換する交直変換装置を具
備した直流送電設備等において、逆変換運転される変換
装置の制御遅れ角リミッタの下限リミッタ値を、直流回
路事故時及び交流回路事故時にそれぞれ変えることを特
徴とする変換装置の制御方式。
In DC power transmission equipment equipped with an AC/DC converter that converts AC to DC and DC to AC, the lower limit value of the control delay angle limiter of the converter that is operated in reverse conversion mode should be set in the event of a DC circuit fault or AC circuit fault. A control method for a conversion device characterized by changing each.
JP57109531A 1982-06-25 1982-06-25 Control system for converter Granted JPS592530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57109531A JPS592530A (en) 1982-06-25 1982-06-25 Control system for converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57109531A JPS592530A (en) 1982-06-25 1982-06-25 Control system for converter

Publications (2)

Publication Number Publication Date
JPS592530A true JPS592530A (en) 1984-01-09
JPH0368620B2 JPH0368620B2 (en) 1991-10-29

Family

ID=14512609

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57109531A Granted JPS592530A (en) 1982-06-25 1982-06-25 Control system for converter

Country Status (1)

Country Link
JP (1) JPS592530A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178568U (en) * 1985-04-25 1986-11-07

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61178568U (en) * 1985-04-25 1986-11-07
JPH0516705Y2 (en) * 1985-04-25 1993-05-06

Also Published As

Publication number Publication date
JPH0368620B2 (en) 1991-10-29

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