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JP3017867B2 - Control device of AC / DC converter - Google Patents

Control device of AC / DC converter

Info

Publication number
JP3017867B2
JP3017867B2 JP3316393A JP31639391A JP3017867B2 JP 3017867 B2 JP3017867 B2 JP 3017867B2 JP 3316393 A JP3316393 A JP 3316393A JP 31639391 A JP31639391 A JP 31639391A JP 3017867 B2 JP3017867 B2 JP 3017867B2
Authority
JP
Japan
Prior art keywords
converter
control
control device
voltage
current
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 - Lifetime
Application number
JP3316393A
Other languages
Japanese (ja)
Other versions
JPH05161360A (en
Inventor
康友 森浦
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
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP3316393A priority Critical patent/JP3017867B2/en
Publication of JPH05161360A publication Critical patent/JPH05161360A/en
Application granted granted Critical
Publication of JP3017867B2 publication Critical patent/JP3017867B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Power Conversion In General (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、直流送電あるいは周波
数変換装置に使用される交直変換器の制御装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an AC / DC converter used in a DC power transmission or frequency converter.

【0002】[0002]

【従来の技術】図3は制御系が2重系の制御装置を持っ
た交直変換装置の片端を示したものである。図3におい
て、1は変換器用変圧器、2はサイリスタ変換器、3は
直流リアクトル、4はサイリスタ変換器へのゲートパル
スを発生するゲートパルス発生器(以下、PGとす
る。)、5A,5Bは交直変換器の制御装置(以下、制
御装置とする)。また、6は直流電流検出用変流器(直
流CT)、7は直流電圧検出用変成器(直流PT)、8
は交流高圧検出器(交流VD)であり、各々直流電流信
号Idc、直流電圧信号Vdc、交流電圧信号Vacを
制御装置5A,5Bへ入力する。
2. Description of the Related Art FIG. 3 shows one end of an AC / DC converter having a dual control system. In FIG. 3, 1 is a converter transformer, 2 is a thyristor converter, 3 is a DC reactor, 4 is a gate pulse generator (hereinafter referred to as PG) for generating a gate pulse to the thyristor converter, 5A, 5B. Denotes a control device of the AC / DC converter (hereinafter, referred to as a control device). 6 is a DC current detection current transformer (DC CT), 7 is a DC voltage detection transformer (DC PT), 8
Is an AC high voltage detector (AC VD), which inputs a DC current signal Idc, a DC voltage signal Vdc, and an AC voltage signal Vac to the control devices 5A and 5B, respectively.

【0003】制御装置5A,5B内部は、9A,9Bは
定電流制御(以下ACR)、10A,10Bは定電圧制
御(以下AVR)、11A,11Bは定余裕角制御(以
下AγR)の各制御である。12A,12Bはα選択回
路であり、ACR9A,9B、AVR10A,10B、
AγR11A,11Bの出力のうちどれを選択するかを
決定する回路である。順変換器の場合は通常ACR9
A,9Bの出力が逆変換器の場合は、通常AVR10
A,10Bの出力が選択される。更に、13A,13B
はα選択回路であり、A系制御装置5AとB系制御装置
5Bの各制御角αのどちらかを選択する制御装置であ
る。通常は各制御装置の制御角の内順変換器の場合は最
大の方をまた、逆変換器の場合は制御角の内小さい方の
制御角が選択される。
In the control devices 5A and 5B, each of 9A and 9B is a constant current control (hereinafter ACR), 10A and 10B are constant voltage control (AVR), and 11A and 11B are constant margin angle control (AγR). It is. 12A and 12B are α selection circuits, and ACRs 9A and 9B, AVRs 10A and 10B,
This is a circuit for determining which of the outputs of the AγRs 11A and 11B is to be selected. Normally ACR9 for forward converter
When the outputs of A and 9B are inverse converters, the normal AVR10
Outputs A and 10B are selected. Further, 13A, 13B
Is an α selection circuit, which is a control device for selecting one of the control angles α of the A-system control device 5A and the B-system control device 5B. Usually, in the case of the forward converter, the control angle of each control device is the largest, and in the case of the inverse converter, the smaller one of the control angles is selected.

【0004】15A,15Bは位相制御回路であり、1
3A,13Bのα選択回路の出力である制御角αに従
い、同期検出回路14A,14Bからの位相信号に基づ
きサイリスタ変換器2へ位相制御パルスPHSを出力す
る。
[0004] Reference numerals 15A and 15B denote phase control circuits.
A phase control pulse PHS is output to the thyristor converter 2 based on the phase signals from the synchronization detection circuits 14A and 14B according to the control angle α output from the α selection circuits 3A and 13B.

【0005】図3に示すACR9A,9B、AVR10
A,10B、AγR11A,11B、α選択回路12
A,12B、α選択回路13A,13Bは図4に示すデ
ィジタル制御装置で構成されている。
ACR9A, 9B, AVR10 shown in FIG.
A, 10B, AγR11A, 11B, α selection circuit 12
A, 12B and α selection circuits 13A, 13B are constituted by digital control devices shown in FIG.

【0006】図4において、16はCPU、17はメモ
リ、18はA/Dコンバータ、19は割り込み制御回
路、20はタイマーである。図4の動作について、図5
のフローチャートを用いて説明する。タイマー20によ
り一定周期でパルスが発生すると割り込み制御回路19
からCPU16に信号が発せられ(S0)、メモリ17
に記憶されているプログラムにより、タイマー割り込み
プログラムが走り始める。まず、A/Dコンバータ18
からIdc,Vdc,Vacを読み込み(S1)、AC
R,AVR、AγRの計算を行い(S2,S3,S
4)、各々の計算結果を選択し(S5)、この出力と他
系の入力を選択して、制御角αを位相制御回路15に出
力する(S6)。この時各計算値の中間値等は、メモリ
17に記憶され次のタイマー割り込み時に使用される。
以上の様にして、制御装置5はPG4を介してサイリス
タ変換器2にゲートパルスを与え、所望の直流電圧、直
流電流を得る。
In FIG. 4, 16 is a CPU, 17 is a memory, 18 is an A / D converter, 19 is an interrupt control circuit, and 20 is a timer. The operation of FIG.
This will be described with reference to the flowchart of FIG. When a pulse is generated at a constant period by the timer 20, the interrupt control circuit 19
Sends a signal to the CPU 16 (S0), and the memory 17
, The timer interrupt program starts running. First, the A / D converter 18
Idc, Vdc, and Vac are read from (S1)
R, AVR and AγR are calculated (S2, S3, S
4), select each calculation result (S5), select this output and the input of the other system, and output the control angle α to the phase control circuit 15 (S6). At this time, the intermediate value of each calculated value is stored in the memory 17 and used at the time of the next timer interruption.
As described above, the control device 5 gives a gate pulse to the thyristor converter 2 via the PG 4 to obtain a desired DC voltage and DC current.

【0007】[0007]

【発明が解決しようとする課題】従来の制御装置では、
図5に示すプログラムを一定周期で動作することにより
サイリスタ変換器2を制御していた。従って、図3に示
すような制御装置5A,5Bが多重系の場合、各制御装
置のタイマーが同期していないため、図6に示すように
直流電流信号Idc、直流電圧信号Vdcの検出値が異
なり、平均値的には上記の検出信号が一定で安定した状
態にも関わらず、多重系制御装置の各々が選択する制御
角αの値が異なることとなり、多重系制御装置間の制御
角αの協調制御ができないという欠点があった。
In the conventional control device,
The thyristor converter 2 was controlled by operating the program shown in FIG. 5 at a constant cycle. Accordingly, when the control devices 5A and 5B are multiplexed as shown in FIG. 3, since the timers of the control devices are not synchronized, the detection values of the DC current signal Idc and the DC voltage signal Vdc are changed as shown in FIG. In contrast, in spite of the fact that the above-mentioned detection signal is constant and stable on average, the values of the control angles α selected by the respective multiplexing controllers are different, and the control angles α between the multiplexing controllers are different. There is a disadvantage that cooperative control cannot be performed.

【0008】ところで、Idc,Vdcは変換装置固有
の現象としてある周波数で脈動しており上記不具合を解
決する手段としては、第1に図3に示す直流リアクトル
3を無限大にすることが考えられるが、現実的ではな
い。また、第2のタイマー割り込み周期を短くすれば良
いが、図5のフローチャートに示すプログラムが実行で
きなくなり、ディジタル制御装置の能力を越えてしま
う。
By the way, Idc and Vdc pulsate at a certain frequency as a phenomenon peculiar to the converter, and as a means for solving the above problem, first, it is conceivable to make the DC reactor 3 shown in FIG. 3 infinite. But it is not realistic. Although the second timer interrupt cycle may be shortened, the program shown in the flowchart of FIG. 5 cannot be executed, which exceeds the capability of the digital control device.

【0009】本発明の目的は、前述のような問題点を解
決するためなされたもので、各制御装置間で制御角αの
協調制御可能で、従来のディジタル制御装置をほぼその
ままの形で用いることのできる交直変換装置の制御装置
を提供することにある。
SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and it is possible to cooperatively control the control angle α between control devices, and to use a conventional digital control device almost as it is. It is an object of the present invention to provide a control device for an AC / DC converter that can perform the control.

【0010】[0010]

【課題を解決するための手段】本発明は前記目的を達成
するため、交流を直流に変換する順変換器、直流を交流
に変換する逆変換器、直流リアクトル及び直流線路から
成る交直変換装置の直流電流、直流電圧及び交流電圧を
入力し、前記交直変換装置の定電流、定電圧、定余裕角
制御を行うディジタル制御装置を複数有する交直変換装
置の制御装置において、前記直流電流及び直流電圧を
記交流電圧と同期してサンプリングし、前記ディジタル
制御装置に入力する手段を備え、前記ディジタル制御装
置間の制御角の協調制御を行なうことを特徴とする交直
変換装置の制御装置である。
In order to achieve the above object, the present invention provides a forward converter for converting AC into DC, an inverse converter for converting DC to AC, an AC / DC converter comprising a DC reactor and a DC line. An AC / DC converter having a plurality of digital controllers for inputting DC current, DC voltage and AC voltage and performing constant current, constant voltage and constant margin angle control of the AC / DC converter.
The control device location, before the DC current and DC voltage
A control device for an AC / DC conversion device, comprising means for sampling in synchronization with the AC voltage and inputting the data to the digital control device, and performing cooperative control of a control angle between the digital control devices.

【0011】[0011]

【作用】本発明によれば、交直変換器に流れる直流電流
Idc、直流電圧Vdcの検出値を多重系制御装置で同
期して検出させるようにしたので、A/Dコンバータを
通して入力される直流電流Idc、直流電圧Vdcは一
致するため多重系制御装置の制御角αの協調制御を行う
ことができる。
According to the present invention, since the detected values of the DC current Idc and the DC voltage Vdc flowing through the AC / DC converter are synchronously detected by the multiplexing control device, the DC current input through the A / D converter is detected. Since Idc and DC voltage Vdc coincide, cooperative control of control angle α of the multiplex system control device can be performed.

【0012】[0012]

【実施例】本発明の構成の一実施例を図1、図2を用い
て説明する。図2中図4と同一の構成部分は説明を省略
する。本発明は図1に示すように直流電流Idc、直流
電圧Vdcの検出値を、多重系制御装置で一致させる手
段で構成したものである。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the configuration of the present invention will be described with reference to FIGS. The description of the same components as those in FIG. 4 in FIG. 2 will be omitted. According to the present invention, as shown in FIG. 1, the multiplex control device matches the detection values of the DC current Idc and the DC voltage Vdc.

【0013】すなわち、図1の様に、同期検出回路14
からの信号を位相制御回路15と割込制御回路19に入
力するようにしたものである。A/D同期検出回路14
には、交流電圧信号Vacが入力されコンバータ18は
動作するため制御装置5の割込制御回路19に取り込ま
れるように構成したものである。
That is, as shown in FIG.
Is input to the phase control circuit 15 and the interrupt control circuit 19. A / D synchronization detection circuit 14
, The AC voltage signal Vac is input, and the converter 18 operates and is taken into the interrupt control circuit 19 of the control device 5.

【0014】このようにすることにより、直流電流Id
c、直流電圧Vdcは多重系制御装置間で一致するた
め、その出力である制御角αの協調制御をとることが可
能となる。
By doing so, the DC current Id
c, since the DC voltage Vdc is the same between the multiplex system controllers, it is possible to perform cooperative control of the control angle α that is the output.

【0015】図2は図1の制御装置5の直流電流および
直流電圧の検出タイミングを示す図である。この図から
わかるとおり、本発明により、直流電流Idc、直流電
圧Vdcの検出値を一致させる事ができるため多重系制
御装置の制御角の協調制御を行うことが容易にできる。
また、本実施例では、系統電圧に対し、各系列の制御装
置が個々に同期をとるため、制御装置間の共通要素がな
く、系列の異常が他の系列へ波及することがない。
FIG. 2 is a diagram showing the detection timing of the DC current and DC voltage of the control device 5 of FIG. As can be seen from the figure, according to the present invention, the detected values of the DC current Idc and the DC voltage Vdc can be made to coincide with each other, so that the coordinated control of the control angles of the multiplex control device can be easily performed.
Further, in this embodiment, since the control devices of each system individually synchronize with the system voltage, there is no common element between the control devices, and the abnormality of the system does not spread to other systems.

【0016】図1の例では同期検出回路14の信号を用
いたが、多重系制御装置の制御周期を一致させるために
そのタイミングを各制御間でやり取りしても同様な効果
を得ることが可能なことは明らかである。また、制御装
置が2重系、PGがI重系のシステム構成を示したが、
制御装置またはPGが2重系以上の多重系の場合でも同
様である。
Although the signal of the synchronization detecting circuit 14 is used in the example of FIG. 1, the same effect can be obtained even if the timing is exchanged between the respective controls in order to make the control periods of the multiplex control device coincide. That is clear. In addition, the control device has a double system, and the PG has an I-system.
The same applies to the case where the control device or the PG is a multiplex system of two or more systems.

【0017】[0017]

【発明の効果】本発明の交直変換器の制御装置によれ
ば、直流電流Idc、直流電圧Vdcの検出を同期して
検出することが可能なため、多重系制御装置の制御角α
の協調制御が容易に行えることとなり交直変換器を安定
に運転することができる。
According to the control device for an AC / DC converter of the present invention, the detection of the DC current Idc and the DC voltage Vdc can be performed synchronously.
Can be easily performed, and the AC / DC converter can be operated stably.

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

【図1】本発明の交直変換器の制御装置の一実施例の一
部を示すブロック図。
FIG. 1 is a block diagram showing a part of an embodiment of a control device for an AC / DC converter according to the present invention.

【図2】図1の制御装置の直流電流、直流電圧の検出タ
イミングを示す図。
FIG. 2 is a diagram showing detection timings of DC current and DC voltage of the control device of FIG. 1;

【図3】本発明の対象である交直変換装置とこの制御装
置の一例を示すブロック図。
FIG. 3 is a block diagram showing an example of an AC / DC conversion device to which the present invention is applied and an example of the control device.

【図4】従来の交直変換装置の制御装置の一例を示す
図。
FIG. 4 is a diagram showing an example of a control device of a conventional AC / DC converter.

【図5】図4の制御装置の制御フローチャート。FIG. 5 is a control flowchart of the control device of FIG. 4;

【図6】従来の交直変換装置の制御装置の直流電流、直
流電圧の検出タイミングを示す図。
FIG. 6 is a diagram showing a detection timing of a DC current and a DC voltage of a control device of a conventional AC / DC converter.

【符号の説明】[Explanation of symbols]

1…変換器用変圧器、2…サイリスタ変換器、3…直流
リアクトル、4…ゲートパルス発生装置(PG)、5…
制御装置、6…直流CT、7…直流PT、8…交流V
D、9…定電流制御(ACR)、10…定電圧制御(A
VR)、11…定余裕角制御(AγR)、12α選択回
路、13…αAαB選択回路、14…同期検出回路、1
5…位相制御回路、16…CPU、17…メモリ、18
…A/Dコンバータ、19…割り込み制御回路、Idc
…直流電流信号、Vdc…直流電圧信号、Vac…交流
電圧信号、α…制御角、PHS…位相制御パルス。
DESCRIPTION OF SYMBOLS 1 ... Transformer transformer, 2 ... Thyristor converter, 3 ... DC reactor, 4 ... Gate pulse generator (PG), 5 ...
Control device, 6: DC CT, 7: DC PT, 8: AC V
D, 9: constant current control (ACR), 10: constant voltage control (A
VR), 11: constant margin angle control (AγR), 12α selection circuit, 13: αAαB selection circuit, 14: synchronization detection circuit, 1
5: phase control circuit, 16: CPU, 17: memory, 18
... A / D converter, 19 ... Interrupt control circuit, Idc
... DC current signal, Vdc ... DC voltage signal, Vac ... AC voltage signal, α ... control angle, PHS ... phase control pulse.

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 交流を直流に変換する順変換器、直流を
交流に変換する逆変換器、直流リアクトル及び直流線路
から成る交直変換装置の直流電流、直流電圧及び交流電
圧を入力し、前記交直変換装置の定電流、定電圧、定余
裕角制御を行うディジタル制御装置を複数有する交直変
換装置の制御装置において、 前記直流電流及び直流電圧を前記交流電圧と同期してサ
ンプリングし、前記ディジタル制御装置に入力する手段
を備え、 前記ディジタル制御装置間の制御角の協調制御を行なう
ことを特徴とする交直変換装置の制御装置。
1. A forward converter for converting alternating current into direct current, the inverse converter for converting direct current into alternating current, direct current of AC-DC converter comprising a DC reactor and a DC line, inputs a DC voltage and an AC voltage, the AC to DC AC / DC converter with multiple digital controllers for constant current, constant voltage and constant margin control of the converter
The control device of the conversion device , further comprising: means for sampling the DC current and the DC voltage in synchronization with the AC voltage and inputting the sampled data to the digital control device, and performing cooperative control of a control angle between the digital control devices. Characteristic control device for AC / DC converter.
JP3316393A 1991-11-29 1991-11-29 Control device of AC / DC converter Expired - Lifetime JP3017867B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3316393A JP3017867B2 (en) 1991-11-29 1991-11-29 Control device of AC / DC converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3316393A JP3017867B2 (en) 1991-11-29 1991-11-29 Control device of AC / DC converter

Publications (2)

Publication Number Publication Date
JPH05161360A JPH05161360A (en) 1993-06-25
JP3017867B2 true JP3017867B2 (en) 2000-03-13

Family

ID=18076584

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3316393A Expired - Lifetime JP3017867B2 (en) 1991-11-29 1991-11-29 Control device of AC / DC converter

Country Status (1)

Country Link
JP (1) JP3017867B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103473393A (en) * 2013-08-20 2013-12-25 国家电网公司 Method for modeling power transmission margin control model considering random probability

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103473393A (en) * 2013-08-20 2013-12-25 国家电网公司 Method for modeling power transmission margin control model considering random probability
CN103473393B (en) * 2013-08-20 2016-04-20 国家电网公司 A kind of transmission of electricity nargin Controlling model modeling method considering random chance

Also Published As

Publication number Publication date
JPH05161360A (en) 1993-06-25

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