JPH0159834B2 - - Google Patents
Info
- Publication number
- JPH0159834B2 JPH0159834B2 JP57120848A JP12084882A JPH0159834B2 JP H0159834 B2 JPH0159834 B2 JP H0159834B2 JP 57120848 A JP57120848 A JP 57120848A JP 12084882 A JP12084882 A JP 12084882A JP H0159834 B2 JPH0159834 B2 JP H0159834B2
- Authority
- JP
- Japan
- Prior art keywords
- control
- converter
- control circuit
- constant current
- circuit
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/12—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Direct Current Feeding And Distribution (AREA)
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
Description
【発明の詳細な説明】
この発明は、直流送電システムにおいて使用さ
れる交直変換器の制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for an AC/DC converter used in a DC power transmission system.
サイリスタバルブにより構成されるこの種の交
直変換器は、第１図に示す如く、定電流制御回路
１、定電圧制御回路２及び定余裕角制御回路３の
各制御回路と、これらの制御回路の出力を自動的
に選択して、上記サイリスタバルブ６の点弧パル
スを発生する点弧パルス発生回路５に制御信号を
入力する最大値選択回路４を具え、交直変換器の
運転制御を確実にするために、各制御回路１〜３
の出力部には上限リミツタと下限リミツタが設け
られている。 As shown in FIG. 1, this type of AC/DC converter composed of a thyristor valve has a constant current control circuit 1, a constant voltage control circuit 2, a constant margin angle control circuit 3, and a control circuit for each of these control circuits. A maximum value selection circuit 4 is provided which automatically selects the output and inputs a control signal to the ignition pulse generation circuit 5 which generates the ignition pulse of the thyristor valve 6, thereby ensuring reliable operation control of the AC/DC converter. Therefore, each control circuit 1 to 3
The output section is provided with an upper limiter and a lower limiter.
このような制御装置を持つ交直変換器を送受電
端に具える直流送電系統では、通常時は、順変換
器運転側が定電流制御され、逆変換器運転側が定
電圧制御もしくは定余裕角制御されるが、起動時
や潮流反転時には、順変換器側と同じく逆変換器
側も定電流制御される為に、起動完了、潮流反転
完了まで時間がかかるという問題があつた。 In a DC power transmission system that has an AC/DC converter with such a control device at the power transmitting/receiving end, normally the forward converter operating side is under constant current control, and the inverse converter operating side is under constant voltage control or constant margin angle control. However, when starting up or reversing the power flow, the reverse converter side is subject to constant current control as well as the forward converter side, so there is a problem that it takes time to complete the start-up and power flow reversal.
この発明は、上記した従来の問題点に鑑みてな
されたもので、定電流制御回路の伝達関数を、起
動もしくは潮流反転時に、そのステツプ応答が平
常時のそれより大きくなるように制御することに
よつて起動及び潮流反転時に、逆変換器動作する
交直変換器の応答性を高めることができ、系統の
起動、潮流反転に要する時間を従来に比して短縮
することができる交直変換器の制御装置を提供す
ることを目的とする。 This invention was made in view of the above-mentioned conventional problems, and it is an object of the present invention to control the transfer function of a constant current control circuit so that its step response is larger than that in normal times at the time of startup or power flow reversal. Therefore, at the time of startup and power flow reversal, the response of the AC/DC converter that operates as an inverse converter can be improved, and the time required for system startup and power flow reversal can be reduced compared to the conventional control. The purpose is to provide equipment.
以下、この発明の一実施例を図について説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
第２図において、７は前記定電流制御回路１の
制御要素であつて、一次遅れ要素８と、該一次遅
れ要素８に制御スイツチ１１により切換附加され
る補償要素（一次進み要素）９と比例要素１０で
構成されている。１２は逆変換器指令INVによ
り投入されるスイツチであつて、該スイツチ１２
を介して電流マージン△Ｉが減算点P1に加えら
れ、電流設定値Irefとの偏差が減算点P2で系統の
直流電流測定値Idcと突合わされる。制御スイツ
チ１１は、信号STの論理値“１”（起動指令）も
しくは信号HANの論理値“１”（潮流反転指令）
により接点ａ−ｃ間が導通し、信号STの論理値
“０”もしくは信号HANの論理値“０”により
接点ｂ−ｃ間が導通する。 In FIG. 2, 7 is a control element of the constant current control circuit 1, which is proportional to a first-order lag element 8 and a compensation element (first-order advance element) 9 which is switched and added to the first-order lag element 8 by a control switch 11. It is composed of 10 elements. 12 is a switch that is turned on by the inverse converter command INV, and the switch 12
The current margin ΔI is added to the subtraction point P 1 via the subtraction point P 1 , and the deviation from the current set value Iref is compared with the DC current measurement value Idc of the system at the subtraction point P 2 . The control switch 11 outputs the logical value “1” of the signal ST (start-up command) or the logical value “1” of the signal HAN (power flow reversal command).
Therefore, the contacts a and c are brought into conduction, and the logic value of the signal ST and the signal HAN is "0", and the contacts b and c are brought into conduction.
この定電流制御回路の平常時の伝達関数は、制
御スイツチ１１が接点ｂ側にあることにより、
H1（Ｓ）＝K1・ｋ１／１＋T1S ……(1)
で、そのステツプ応答は
h1（ｔ）＝１−e-t/T1 ……(2)
であるが、逆変換運転における起動時もしくは潮
流反転時には、制御スイツチ１１が接点ａ側へ制
御されることにより、
H2（Ｓ）＝K1・K2１＋T2S／１＋T1S ……(3)
となり、そのステツプ応答は、
h2（ｔ）＝１−e-t/T1＋T2／T1e-t/T2 ……(4)
となる。(2)式と(4)式を比較した場合、ステツプ応
答は、(4)式の第３項に相当する量だけ、H2（Ｓ）
の方が応答が速い。従つて、起動時及び潮流反転
時の系統の直流電圧は速やかに変化する。しか
し、起動、潮流反転の完了後は、制御系の安定の
ために伝達関数をH2（Ｓ）→H1（Ｓ）へ切換制御
する。この切換制御の為の制御解除指令SEは、
下記条件が夫々満足されたことを条件として発生
させる。 Since the control switch 11 is on the contact b side, the normal transfer function of this constant current control circuit is H 1 (S) = K 1 · k1/1 + T 1 S (1), and its step response is h 1 (t)=1−e -t/T1 (2) However, at the time of start-up or power flow reversal in reverse conversion operation, the control switch 11 is controlled to the contact a side, so that H 2 ( S)= K1・K21 + T2S /1+ T1S ...(3), and the step response is h2 (t)=1-e -t/T1 + T2 / T1e -t/T2 ...(4) becomes. When comparing equations (2) and (4), the step response is H 2 (S) by an amount corresponding to the third term of equation (4).
has a faster response. Therefore, the DC voltage of the system changes rapidly at startup and during power flow reversal. However, after completion of startup and power flow reversal, the transfer function is switched from H 2 (S) to H 1 (S) to stabilize the control system. The control release command SE for this switching control is
It is generated on the condition that each of the following conditions is satisfied.
最大値選択回路において、定電流制御回路１
の出力が選択されなくなつた場合、
系統の直流電流が異常に小さくなつた場合、
異常時における保護動作の作動を知らせる信号
の発生、
第３図に、上記制御終了信号SEを発生させる
為の回路の実施例を示す。図において、１３は系
統の直流電流Idcを設定値（正）εIと比較して、
Idc＞εIの時に論理値“１”を出力する比較回路、
１４は比較回路であつて、定電流制御回路１の出
力cos αcを、定電圧制御回路２の出力cos αv、
定余裕角制御回路３の出力cos αrと比較し、
cos αc≦cos αv、またはcos αccos αvであ
る時に論理値“１”を出力する。１５及び１６は
OR回路１７はAND回路である。spは異常現象に
対する保護動作の作動の結果に発生する保護動
作々動信号であつて、ゲートブロツク指令信号
G.B、ゲートシフト指令信号、バイパスペア指令
信号、転流失敗予防指令信号C.F等が含まれる。
INVは逆変換器指令である。 In the maximum value selection circuit, constant current control circuit 1
When the output of the system is no longer selected, when the direct current of the system becomes abnormally small, a signal is generated to notify the activation of the protective operation in the event of an abnormality. An example of a circuit is shown. In the figure, 13 compares the DC current Idc of the system with the set value (positive) εI,
A comparison circuit that outputs a logical value “1” when Idc>εI,
14 is a comparison circuit which compares the output cos αc of the constant current control circuit 1, the output cos αv of the constant voltage control circuit 2,
It is compared with the output cos αr of the constant margin angle control circuit 3, and outputs a logical value of “1” when cos αc≦cos αv or cos αccos αv. 15 and 16 are
The OR circuit 17 is an AND circuit. sp is a protective operation movement signal generated as a result of the activation of a protective operation against an abnormal phenomenon, and is a gate block command signal.
Includes GB, gate shift command signal, bypass pair command signal, commutation failure prevention command signal CF, etc.
INV is the inverter command.
以上の如く、この発明によれば、定電流制御回
路の平常時伝達関数を補償する補償要素を制御可
能に設け、起動指令もしくは潮流反転指令の有無
により総合伝達関数を制御可能な構成としたこと
によつて、系統起動もしくは潮流反転時、逆変換
器運転される交流直変換器における定電流制御か
ら定電圧制御へ移行を従来に比して速やかに行わ
せることができるので、系統の起動、潮流反転を
従来に比し短時間で完了させることができる。 As described above, according to the present invention, the compensation element for compensating the normal transfer function of the constant current control circuit is controllably provided, and the overall transfer function is configured to be controllable depending on the presence or absence of a startup command or a power flow reversal command. With this, when the system starts up or the power flow is reversed, the transition from constant current control to constant voltage control in the AC/DC converter operated by the inverse converter can be performed more quickly than before, so the system start-up, Power flow reversal can be completed in a shorter time than in the past.
第１図は交直変換器の制御装置の基本構成を示
す回路図、第２図はこの発明による交直変換器の
制御装置における定電流制御回路の実施例のブロ
ツク図、第３図は上記実施例における制御解除指
令発生回路のブロツク図である。
図において、８…一次遅れ要素、９…一次進み
要素、１０…比例要素、１１…制御スイツチ、１
２…スイツチ、１３，１４…比較回路、１５，１
６…OR回路、１７…AND回路。なお、図中、同
一符号は、同一又は相当部分を示す。
FIG. 1 is a circuit diagram showing the basic configuration of a control device for an AC/DC converter, FIG. 2 is a block diagram of an embodiment of a constant current control circuit in the control device for an AC/DC converter according to the present invention, and FIG. 3 is a block diagram of the above embodiment. FIG. 2 is a block diagram of a control release command generation circuit in FIG. In the figure, 8...first-order lag element, 9...first-order advance element, 10...proportional element, 11...control switch, 1
2...Switch, 13, 14...Comparison circuit, 15, 1
6...OR circuit, 17...AND circuit. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
換器であつて、定電流制御回路、定電圧制御回路
および定余裕角制御回路を有し、これらの制御回
路の出力を最大値比較回路で選択して交直変換器
の制御信号とするものにおいて、定電流制御回路
の伝達関数がステツプ応答制御可能に補償要素を
含み、逆変換器運転される交直変換器の定電流制
御回路が、起動指令もしくは潮流反転指令を受け
て、上記ステツプ応答制御を選択することを特徴
とする交直変換器の制御装置。 ２ 系統の直流電流の所定値よりの低下、定電流
制御の喪失、系統保護動作の作動終了のいずれか
１の発生によりステツプ応答制御が解除されるこ
とを特徴とする特許請求の範囲第１項記載の交直
変換器の制御装置。[Scope of Claims] 1. An AC/DC converter installed at the power transmitting/receiving end of a DC power transmission system, which has a constant current control circuit, a constant voltage control circuit, and a constant margin angle control circuit, and has a constant current control circuit, a constant voltage control circuit, and a constant margin angle control circuit. In the case where the maximum value comparison circuit selects the control signal for the AC/DC converter, the transfer function of the constant current control circuit includes a compensation element to enable step response control, and the constant current control of the AC/DC converter operated by the inverse converter is performed. A control device for an AC/DC converter, wherein the circuit selects the step response control in response to a start command or a power flow reversal command. 2. The step response control is canceled upon occurrence of any one of a decrease in the DC current of the system below a predetermined value, loss of constant current control, and termination of system protection operation. A control device for the AC/DC converter described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57120848A JPS5911780A (en) | 1982-07-12 | 1982-07-12 | Control device for ac/dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57120848A JPS5911780A (en) | 1982-07-12 | 1982-07-12 | Control device for ac/dc converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5911780A JPS5911780A (en) | 1984-01-21 |
| JPH0159834B2 true JPH0159834B2 (en) | 1989-12-19 |
Family
ID=14796441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57120848A Granted JPS5911780A (en) | 1982-07-12 | 1982-07-12 | Control device for ac/dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5911780A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05340809A (en) * | 1992-06-05 | 1993-12-24 | Shibuya Kogyo Co Ltd | Device for detecting output of laser beam |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0329540Y2 (en) * | 1987-03-04 | 1991-06-24 |
-
1982
- 1982-07-12 JP JP57120848A patent/JPS5911780A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05340809A (en) * | 1992-06-05 | 1993-12-24 | Shibuya Kogyo Co Ltd | Device for detecting output of laser beam |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5911780A (en) | 1984-01-21 |
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