JPS642034B2 - - Google Patents
Info
- Publication number
- JPS642034B2 JPS642034B2 JP56037840A JP3784081A JPS642034B2 JP S642034 B2 JPS642034 B2 JP S642034B2 JP 56037840 A JP56037840 A JP 56037840A JP 3784081 A JP3784081 A JP 3784081A JP S642034 B2 JPS642034 B2 JP S642034B2
- Authority
- JP
- Japan
- Prior art keywords
- control
- constant
- current
- constant voltage
- 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
- 238000000034 method Methods 0.000 claims description 50
- 238000012545 processing Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 description 12
- 238000001514 detection method Methods 0.000 description 8
- 238000012546 transfer Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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】
本発明は、電力変換装置の制御装置に係り、特
に直流送電用電力変換装置の位相制御に好適な制
御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a power converter, and particularly to a control device suitable for phase control of a power converter for DC power transmission.
従来、直流送電用電力変換装置の制御において
は、直流送電系統の直流電流を一定に保つための
定電流制御と、直流電圧を一定に保つための定電
圧制御を基本とし、定電流制御運転する場合は、
定電圧制御系を飽和させることによつて、定電流
制御系を動作させ、定電圧制御運転する場合は、
定電流制御系を飽和させることによつて、定電圧
制御系を動作させる方式が採用されているが、定
電流制御系、及び定電圧制御系は時間遅れ要素を
含んでいるので、従来方式では、定電流制御状態
から定電圧制御状態への切り換え、及び定電圧制
御状態から定電流制御状態への切り換えを瞬時に
行うことができない。 Conventionally, the control of power converters for DC power transmission is based on constant current control to keep the DC current of the DC transmission system constant and constant voltage control to keep the DC voltage constant, and constant current control operation is performed. In case,
When operating the constant current control system by saturating the constant voltage control system and performing constant voltage control operation,
A method has been adopted in which the constant voltage control system is operated by saturating the constant current control system, but since the constant current control system and constant voltage control system include a time delay element, the conventional method , it is not possible to instantly switch from a constant current control state to a constant voltage control state, and from a constant voltage control state to a constant current control state.
本発明の目的は、定電流制御状態と定電圧制御
状態の間の切り換えを瞬時に行えるようにするこ
とにある。 An object of the present invention is to enable instantaneous switching between a constant current control state and a constant voltage control state.
本発明は、定電流制御状態から定電圧制御状態
への切り換え時点では、定電流制御系の出力を定
電圧制御系へ転送し、また、定電圧制御状態から
定電流制御状態への切り換え時点では、定電圧制
御系の出力を定電流制御系へ転送するようにした
ことにより、定電流制御状態と定電圧制御状態の
間の切り換えを瞬時に行えるようにしたものであ
る。 The present invention transfers the output of the constant current control system to the constant voltage control system when switching from the constant current control state to the constant voltage control state, and transfers the output of the constant current control system to the constant voltage control system when switching from the constant voltage control state to the constant current control state. By transferring the output of the constant voltage control system to the constant current control system, it is possible to instantly switch between the constant current control state and the constant voltage control state.
本発明を説明するため、二端子直流送電系統、
及びその制御装置の一例を第１図に示す。 To illustrate the invention, a two-terminal DC transmission system,
An example of the control device is shown in FIG.
主回路は、三相交流系統１，２、電力変換装置
３，４、直流リアクトル５，６、直流送電線７か
らなつており、制御装置１０は、直流電流検出回
路８、及び直流電圧検出回路９により直流電流及
び直流電圧を検出しその検出値に従つて電力変換
装置３を位相制御する。以下、制御装置の詳細を
説明する。パルス発生回路１１は周期的なパルス
を発生し、演算処理回路１２は、パルス発生回路
１１のパルスによつて起動され、記憶回路１３に
記憶されている演算処理手続きに従つて直流電流
検出値及び直流電圧検出値及び直流電流設定値１
４、及び直流電圧設定値１５を、入力回路１６を
介して取り込み記憶回路１３に記憶されている演
算処理手続きに従つて記憶回路１３に記憶されて
いるデータと、入力回路１６から取り込んだデー
タとの間で演算処理を行い電力変換装置３を位相
制御するための信号を作成し、出力回路１７を介
して位相制御回路１８に、その信号を出力する。
位相制御回路１８は、出力回路１７からの信号に
従つて、ゲートパルスを発生し、電力変換装置を
駆動する。また入力装置１９は記憶回路１３に記
憶されている演算処理手続き及びデータを外部か
ら変更するものである。 The main circuit consists of three-phase AC systems 1 and 2, power converters 3 and 4, DC reactors 5 and 6, and DC transmission line 7, and the control device 10 includes a DC current detection circuit 8 and a DC voltage detection circuit. 9 detects DC current and DC voltage, and controls the phase of the power converter 3 according to the detected values. The details of the control device will be explained below. The pulse generating circuit 11 generates periodic pulses, and the arithmetic processing circuit 12 is activated by the pulse of the pulse generating circuit 11 and calculates the detected DC current value and the arithmetic processing procedure stored in the memory circuit 13. DC voltage detection value and DC current setting value 1
4 and the DC voltage setting value 15 are taken in through the input circuit 16, and the data stored in the storage circuit 13 according to the arithmetic processing procedure stored in the storage circuit 13 and the data taken in from the input circuit 16 are Arithmetic processing is performed between them to create a signal for controlling the phase of the power conversion device 3, and the signal is output to the phase control circuit 18 via the output circuit 17.
The phase control circuit 18 generates a gate pulse according to the signal from the output circuit 17 to drive the power converter. The input device 19 is used to externally change arithmetic processing procedures and data stored in the storage circuit 13.
第２図に本発明を適用した演算処理手続きの流
れ図の一例を示す。演算処理手続きはパルス発生
回路１１からのパルスにより開始し、まず、判断
２１によつて定電流制御を行うか定電圧制御を行
うか判断し、定電流制御を行う場合は、判断２２
に進む判断２２によつて前回の演算処理が定電圧
制御演算であつたかどうかを判断し、前回、定電
流制御演算であつた場合は、処理２４に進み、前
回、定電圧制御演算であつた場合は、処理２３に
進む。処理２３′では前回の定電圧制御演算処理
２９の演算結果VR0の内容を前回の定電流制御演
算処理２４の演算結果CR0として使用するため、
VR0の内容をCR0に転送する。すなわち、CR0＝
VR0とする。その後に処理２４に進む。処理２４
は、直流送電系統の直流電流検出値、及び直流電
流設定値等から、直流電流を一定に保つために電
力変換装置の位相を変化させるため、定電流制御
信号の変化分を算出し、その結果を前回の定電流
制御信号CR0に加算し、定電流制御信号CRとし、
処理２５に進む、処理２５は、CRの値を保持し
ておくために、CRの値をCR0に転送し、処理２
６に進む、処理２６は、CR0を位相制御装置１８
に、出力回路１７を介して出力し、位相制御装置
１８に定電流制御動作をさせ終了する。 FIG. 2 shows an example of a flowchart of an arithmetic processing procedure to which the present invention is applied. The arithmetic processing procedure starts with a pulse from the pulse generation circuit 11, and first, it is determined by judgment 21 whether to perform constant current control or constant voltage control, and if constant current control is to be performed, judgment 22 is made.
In judgment 22, it is determined whether the previous calculation process was a constant voltage control calculation, and if the previous calculation was a constant current control calculation, the process proceeds to process 24, where it is determined whether the previous calculation process was a constant voltage control calculation. If so, proceed to process 23. In process 23', the content of the calculation result VR 0 of the previous constant voltage control calculation process 29 is used as the calculation result CR 0 of the previous constant current control calculation process 24.
Transfer the contents of VR 0 to CR 0 . That is, CR 0 =
Set VR to 0 . Thereafter, the process proceeds to process 24. Processing 24
calculates the change in the constant current control signal in order to change the phase of the power converter to keep the DC current constant from the DC current detection value of the DC transmission system, the DC current setting value, etc., and calculates the change in the constant current control signal. is added to the previous constant current control signal CR 0 to obtain the constant current control signal CR,
Proceed to process 25. Process 25 transfers the value of CR to CR 0 in order to hold the value of CR, and then proceeds to process 2.
Proceed to step 6, process 26 converts CR 0 to phase controller 18
Then, the signal is outputted via the output circuit 17 to cause the phase control device 18 to perform a constant current control operation, and the process ends.
定電圧制御を行う場合は、判断２１から判断２
７に進み、判断２７によつて前回の演算処理が定
電流制御演算であつたかどうかを判断し、前回、
定電圧制御演算であつた場合は、処理２９に進
み、前回、定電流制御演算であつた場合は、処理
２８に進む。処理２８では、前回の定電流制御演
算処理２４の演算結果CR0の内容を前回の定電圧
制御演算処理２９の演算結果VR0として使用する
ため、CR0の内容をVR0に転送する。すなわち
VR0＝CR0とする。その後に処理２９に進む。処
理２９は、直流送電系統の直流電圧を一定に保つ
ために電力変換装置の位相を変化させるため、定
電圧制御信号の変化分を算出し、その結果を、前
回の定電圧制御信号VR0に加算し、定電圧制御信
号VRとし、処理３０に進む、処理３０は、VR
の値を保持しておくために、VRの値をVR0に転
送し、処理３１に進む、処理３１はVR0を位相制
御装置１８に出力回路１７を介して出力し、位相
制御装置１８を定電圧制御動作をさせ終了する。 When performing constant voltage control, judgment 21 to judgment 2
Proceeding to step 7, it is determined in judgment 27 whether the previous calculation process was a constant current control calculation, and
If it was a constant voltage control calculation, the process advances to process 29, and if the previous constant current control calculation was performed, the process advances to process 28. In process 28, in order to use the contents of the calculation result CR 0 of the previous constant current control calculation process 24 as the calculation result VR 0 of the previous constant voltage control calculation process 29, the contents of CR 0 are transferred to VR 0 . i.e.
Let VR 0 = CR 0 . After that, the process proceeds to process 29. In process 29, in order to change the phase of the power converter in order to keep the DC voltage of the DC transmission system constant, the amount of change in the constant voltage control signal is calculated, and the result is applied to the previous constant voltage control signal VR 0 . The signal is added to the constant voltage control signal VR, and the process proceeds to step 30.
In order to hold the value of VR, the value of VR is transferred to VR 0 , and the process proceeds to process 31. Process 31 outputs VR 0 to the phase control device 18 via the output circuit 17, and Perform constant voltage control operation and end.
この制御方式を適用した場合、定電流制御状態
と定電圧制御状態の間の切り換えにおいては、切
り換え前の動作点を初期状態として切り換え後の
制御を行うから、切り換えを瞬時に行つても、滑
らかな制御が行える。 When this control method is applied, when switching between the constant current control state and the constant voltage control state, the operating point before switching is used as the initial state and the post-switching control is performed, so even if the switching is instantaneous, the switching will be smooth. control can be performed.
また、本発明の具体的効果を第３図、及び第４
図によつて説明する。 In addition, the specific effects of the present invention are shown in Figures 3 and 4.
This will be explained using figures.
第３図は、二端子直流送電系統の一例であり、
電力変換装置４１，４２、直流リアクトル４３，
４４、及び直流送電線４５からなつており、い
ま、電力変換装置４１が順変換器運転で定電流制
御状態であり、電力変換装置４２が逆変換器運転
で定電圧制御状態であるものとし、このとき直流
送電線４５のアーク地絡事故が発生したとする
と、各部の電流は、第４図の１のようになる。 Figure 3 is an example of a two-terminal DC transmission system,
Power converters 41, 42, DC reactor 43,
It is assumed that the power converter 41 is in a forward converter operation and is in a constant current control state, and the power converter 42 is in a reverse converter operation and in a constant voltage control state, If an arc ground fault occurs in the DC power transmission line 45 at this time, the current in each part will be as shown in 1 in FIG. 4.
第４図１のi1は第３図のループ４７の電流であ
り、i2は、第３図のループ４８の電流であり、電
流i1と電流i2の和がアーク４６の電流i3となる。
したがつて時点t1でアーク地絡事故が発生したと
すると電流i2はしだいにゼロになるので、アーク
電流i3は増加し、i1と同じ値となる。その後は電
力変換装置４１の定電流制御系の働きにより、ア
ーク電流が継続し、系統は回復しない。もし、時
点t1で電力変換装置４２の動作を定電圧制御状態
から定電圧制御状態に瞬時に切り換えることがで
きれば、第４図２のように第３図のループ４８の
電流i2も、電流i1と同様に回復するもので、アー
ク電流i3は、ゼロに押えられる。したがつて、電
流i3がゼロになつた時点t2において、アークは消
え、系統は回復する。したがつて、時点t2におい
て電力変換装置４２の動作を定電圧制御状態に再
び切り換えれば、アーク地絡事故が発生する前の
状態に復旧する。以上のような事故の場合、本発
明による制御方式が有効である。 i 1 in FIG. 4 1 is the current in the loop 47 in FIG. 3, i 2 is the current in the loop 48 in FIG. 3, and the sum of the current i 1 and the current i 2 is the current i 3 in the arc 46. becomes.
Therefore, if an arc ground fault occurs at time t1 , the current i2 gradually becomes zero, so the arc current i3 increases to the same value as i1 . After that, the arc current continues due to the constant current control system of the power converter 41, and the system does not recover. If the operation of the power converter 42 can be instantaneously switched from the constant voltage control state to the constant voltage control state at time t 1 , the current i 2 in the loop 48 in FIG. 3 as shown in FIG. It recovers in the same way as i 1 , and the arc current i 3 is suppressed to zero. Therefore, at time t 2 when the current i 3 becomes zero, the arc is extinguished and the system is restored. Therefore, if the operation of the power conversion device 42 is switched back to the constant voltage control state at time t2 , the state before the arc ground fault occurs will be restored. In the case of the above-mentioned accidents, the control method according to the present invention is effective.
実際の直流送電系統の制御においては、定電流
制御及び、定電圧制御だけでなく、定余裕角制御
及び、位相角リミツタ等を含む場合が多いので、
その場合の本発明の変形例を第５図に示す。 In actual DC power transmission system control, it often includes not only constant current control and constant voltage control, but also constant margin angle control, phase angle limiter, etc.
A modification of the present invention in that case is shown in FIG.
定電流制御演算処理は、前回の位相制御信号出
力であるCSを処理５０で定電流制御演算のため
の初期値CR0に転送し、CR0を用いて処理５１に
おいて定電流制御のための信号CRを作成する。 In the constant current control calculation process, the previous phase control signal output CS is transferred to the initial value CR 0 for constant current control calculation in process 50, and using CR 0 , the signal for constant current control is transferred in process 51. Create a CR.
定電圧制御演算処理は、CSを処理５２で定電
圧制御演算のための初期値VR0に転送し、VR0を
用いて処理５３において定電圧制御のための信号
VRを作成する。 In the constant voltage control calculation process, CS is transferred to the initial value VR 0 for constant voltage control calculation in process 52, and using VR 0 , a signal for constant voltage control is transferred in process 53.
Create VR.
定余裕角制御演算処理５４は、電力変換装置が
転流失敗を起こさないようにするため交流電圧検
出値、及び直流電流検出値から、位相遅れ角の大
きさを制限する信号ARを作成する。 The constant margin angle control calculation process 54 creates a signal AR that limits the size of the phase delay angle from the AC voltage detection value and the DC current detection value in order to prevent the power converter from commutation failure.
また、処理５５は、位相遅れ角の動作範囲を制
限するための信号を作成する。 Further, the process 55 creates a signal for limiting the operating range of the phase delay angle.
処理５６は、処理５１，５３，５４，５５で作
成した信号の中から出力すべき信号を選択し位相
制御信号CSとする。 A process 56 selects a signal to be output from among the signals created in processes 51, 53, 54, and 55 and sets it as a phase control signal CS.
処理５７は、位相制御信号CSを位相制御装置
に出力する。以上の処理を含んだ演算をくり返し
行い、直流送電用電力変換装置の位相制御を行
う。 Processing 57 outputs the phase control signal CS to the phase control device. The calculations including the above processing are repeated to perform phase control of the DC power transmission power converter.
この変形例においては、定余裕角制御状態及び
リミツタ動作から瞬時に、定電圧制御状態または
定電流制御状態に切り換えることも可能である。 In this modification, it is also possible to instantly switch from the constant margin angle control state and limiter operation to the constant voltage control state or constant current control state.
以上のように、本発明によれば、電力変換装置
の制御状態を瞬時に切り換えるようにすることが
できる。 As described above, according to the present invention, the control state of the power conversion device can be switched instantaneously.
第１図、及び第２図は本発明の説明図であり、
第３図、及び第４図は本発明の効果を説明するた
めの図であり、第５図は、本発明の変形例であ
る。
１，２……三相交流系統、３，４，４１，４２
……電力変換装置、５，６，４３，４４……直流
リアクトル、７，４５……直流送電線、８……直
流電流検出回路、９……直流電圧検出回路、１０
……制御装置、１１……パルス発生回路、１２…
…演算処理回路、１３……記憶回路、１４……直
流電流設定値、１５……直流電圧設定値、１６…
…入力回路、１７……出力回路、１８……位相制
御回路、１９……入力装置、４６……アーク、４
７，４８……ループ。
FIG. 1 and FIG. 2 are explanatory diagrams of the present invention,
3 and 4 are diagrams for explaining the effects of the present invention, and FIG. 5 is a modification of the present invention. 1, 2...Three-phase AC system, 3, 4, 41, 42
... Power conversion device, 5, 6, 43, 44 ... DC reactor, 7, 45 ... DC power transmission line, 8 ... DC current detection circuit, 9 ... DC voltage detection circuit, 10
...Control device, 11...Pulse generation circuit, 12...
... Arithmetic processing circuit, 13 ... Memory circuit, 14 ... DC current setting value, 15 ... DC voltage setting value, 16 ...
...Input circuit, 17...Output circuit, 18...Phase control circuit, 19...Input device, 46...Arc, 4
7,48...Loop.
Claims (1)
するための制御信号を切換えていずれか１つの制
御信号に応じて電力変換装置を制御する制御装置
において、前記電力変換装置を含む系統から検出
した電流および電圧を入力する入力回路と、演算
処理手順および前記検出電流と電圧のデータを記
憶する記憶回路と、前記入力回路から検出電流と
電圧のデータを取込み、前記記憶回路内の演算処
理手順に従つて演算処理を行ない、前記電力変換
装置を定電流制御するための第１の信号および定
電圧制御するための第２の信号をつくるものであ
つて、上記第１および第２の信号をつくる際に過
去の第２および第１の信号をそれぞれ用いる演算
処理回路とを備えることを特徴とする電力変換装
置の制御装置。1. In a control device that switches a control signal for constant current and a control signal for constant voltage and controls a power conversion device according to either one of the control signals, a control signal detected from a system including the power conversion device an input circuit for inputting current and voltage; a memory circuit for storing arithmetic processing procedures and data of the detected current and voltage; and an input circuit for taking in data of the detected current and voltage from the input circuit and applying the data to the arithmetic processing procedure in the memory circuit. Therefore, it performs arithmetic processing to generate a first signal for constant current control and a second signal for constant voltage control of the power conversion device, and generates the first and second signals. 1. A control device for a power conversion device, comprising: an arithmetic processing circuit that uses past second and first signals, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56037840A JPS57153565A (en) | 1981-03-18 | 1981-03-18 | Controller for ac/dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56037840A JPS57153565A (en) | 1981-03-18 | 1981-03-18 | Controller for ac/dc converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57153565A JPS57153565A (en) | 1982-09-22 |
| JPS642034B2 true JPS642034B2 (en) | 1989-01-13 |
Family
ID=12508722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56037840A Granted JPS57153565A (en) | 1981-03-18 | 1981-03-18 | Controller for ac/dc converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57153565A (en) |
-
1981
- 1981-03-18 JP JP56037840A patent/JPS57153565A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57153565A (en) | 1982-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4262241A (en) | Control system for commutatorless motor driven through frequency converter | |
| JPS64899B2 (en) | ||
| JPS6142512B2 (en) | ||
| JPS58105315A (en) | Controlling method of pwm converter | |
| JP3040077B2 (en) | Power converter | |
| JP2797937B2 (en) | Inverter control device | |
| JPH08308233A (en) | Controller of AC / DC converter | |
| JPS61227672A (en) | Overvoltage suppressing control circuit of ac/dc converter | |
| JP2533848B2 (en) | Ignition pulse generation method at power converter startup | |
| JPH0377524B2 (en) | ||
| JP2781145B2 (en) | Power transmission control device | |
| JPS6152113A (en) | Method of controlling ac/dc converter | |
| JPH0510910B2 (en) | ||
| JPH1023763A (en) | Control device for separately-excited inverter | |
| JPH09191566A (en) | Power converter controller | |
| JP3162546B2 (en) | Control device of AC / DC converter | |
| JPS6112478B2 (en) | ||
| JPH0216658B2 (en) | ||
| JPS6336212B2 (en) | ||
| JPH04205608A (en) | Controlling method for static type reactive power compensator | |
| JPH08308234A (en) | Controller of AC / DC converter | |
| JPS5980184A (en) | Speed control system for induction motor | |
| JPS58136270A (en) | Optimum switching method for anti-parallel thyristor converter | |
| JPH05316644A (en) | Power converter control method | |
| JPS592530A (en) | Control system for converter |