JPS6026466A - Control system of power converter - Google Patents

Control system of power converter

Info

Publication number
JPS6026466A
JPS6026466A JP58130758A JP13075883A JPS6026466A JP S6026466 A JPS6026466 A JP S6026466A JP 58130758 A JP58130758 A JP 58130758A JP 13075883 A JP13075883 A JP 13075883A JP S6026466 A JPS6026466 A JP S6026466A
Authority
JP
Japan
Prior art keywords
voltage
output
source inverter
circuit
signal
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.)
Pending
Application number
JP58130758A
Other languages
Japanese (ja)
Inventor
Katsuji Iida
克二 飯田
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.)
Toyo Denki Seizo KK
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Denki Seizo KK
Toyo Electric Manufacturing 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 Toyo Denki Seizo KK, Toyo Electric Manufacturing Ltd filed Critical Toyo Denki Seizo KK
Priority to JP58130758A priority Critical patent/JPS6026466A/en
Publication of JPS6026466A publication Critical patent/JPS6026466A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To suppress the variation in the output voltage by detecting and differentiating a DC voltage of a voltage type inverter by an inverter in combination with current and voltage types, and synthesizing it with an output of an error amplifier. CONSTITUTION:An inverter of voltage and current types is driven at a voltage type inverter 3 by a signal of a reference signal generator 7, and driven at a current type inverter 2 by a signal from a phase controller 12 by the signal. The output is supplied through a transformer 4 to a load 5, and the output is compared by a voltage detector 9 as a feedback signal with a set signal of a voltage setter 10. This deviation is applied through an error amplifier 11 to the phase controller. In this case, the DC voltage E3 of the inverter 3 is detected, a differentiating circuit 14 is provided, the output and the output of the amplifier 11 is synthesized by a composite circuit 15, and applied as an input signal to the controller 12.

Description

【発明の詳細な説明】 本発明は直流入力電源電圧や負荷が急変した場合に極め
て迅速に電圧形インバータ回路の出力電圧を所定の値に
復帰せしめることができる電力変換装置の制御方式に関
する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control system for a power conversion device that can extremely quickly restore the output voltage of a voltage source inverter circuit to a predetermined value when the DC input power supply voltage or load suddenly changes.

電流形インバータと電圧形インバータの直流入力端子を
直列に接続し、さらに両イン/s”l−夕の交流出力端
子を変圧器を介して並列接続したものにおいて、固定の
点弧期間でスイッチング動作する電圧形インバータの発
生する方形波出力電圧を変圧器を介して電流形インバー
タの交流端子に加えるようにし、この方形波出力電圧を
基準として電流形インバータを位相制御することにより
、電圧インバータの出力電圧を制御することができる0
この方式による電力変換装置は本出願人によって既出願
の特願昭57−11684号を提案している。
The DC input terminals of a current-source inverter and a voltage-source inverter are connected in series, and the AC output terminals of both outputs are connected in parallel via a transformer, and switching operation is performed with a fixed firing period. By applying the square wave output voltage generated by the voltage source inverter to the AC terminal of the current source inverter via a transformer, and controlling the phase of the current source inverter based on this square wave output voltage, the output of the voltage inverter can be adjusted. Voltage can be controlled 0
A power converter using this system has been proposed by the present applicant in Japanese Patent Application No. 11684/1984.

かかる電流形インバータと電圧形インlく一夕を用いた
電力変換装置の1例の主回路要部構成を第1図に示す。
FIG. 1 shows the main circuit configuration of an example of a power conversion device using such a current source inverter and a voltage source inverter.

第1図において1は直流電源、2は電流形インバータで
単相ブリッジ回路の場合を示す。平滑リアクトル6およ
び制御整流素子21〜24からなる回路により単相の電
流形インノく一夕回路を構成している。3は電圧形イン
バータで、中間タップ付平滑コンデンサ31 、32を
電圧源として動作する単相の半ブリツジ回路の場合を示
している。
In FIG. 1, 1 is a DC power supply, 2 is a current source inverter, and shows the case of a single-phase bridge circuit. A circuit consisting of the smoothing reactor 6 and the controlled rectifying elements 21 to 24 constitutes a single-phase current type inverter circuit. 3 is a voltage source inverter, which is a single-phase half-bridge circuit that operates with intermediate tapped smoothing capacitors 31 and 32 as voltage sources.

33 、34は制御整流素子である。4は変圧器で、電
圧形インバータ3の方形波出力電圧を絶縁および変圧し
て電流形インバータ2の交流端子に加え、電流形インバ
ータ2の転流および両インバータ間の電力の授受を行う
経路となる。5は負荷で、第1図においては変圧器4の
独立した巻線に接続しているが、電流形インバータ2あ
るいは電圧形インバータ3の交流端子に接続しても可能
なこさは言うまでもない。
33 and 34 are controlled rectifying elements. 4 is a transformer which insulates and transforms the square wave output voltage of the voltage source inverter 3 and applies it to the AC terminal of the current source inverter 2, and serves as a path for commutation of the current source inverter 2 and transfer of power between both inverters. Become. Reference numeral 5 denotes a load, which is connected to an independent winding of the transformer 4 in FIG. 1, but it goes without saying that it can also be connected to the AC terminals of the current source inverter 2 or the voltage source inverter 3.

第1図の主回路構成における従来の制御回路例を第2図
のブロック図に示す。第2図において第1図と同−符号
のものは同一機能のものを示し、7は電圧形インバータ
3の制御整流素子33 、34を固定した点弧期間でオ
ン・オフさせる信号の原信号を発生させる基準信号発生
回路である。その基準信号発生回路7の出力は、電圧形
インバータ3の制御整流素子33 、34のゲート信号
を送出するゲート増巾器8と、電流形インバータ2の制
御整流素子21〜24の点弧期間を位相制御信号に応じ
て決定する位相制御回路12に与えられる。9は変圧器
4の出力電圧を検出する出力電圧検出回路であり、その
出力は出力電圧帰還信号として、電圧設定器10の電圧
設定信号と比較され、その偏差が誤差増巾器11によっ
て増巾される。誤差増巾器11の出力は、位相制御信号
として位相制御回路12に印加される。位相制御回路1
2は基準信号発生回路7からの信号を基準として、位相
制御信号のレベルに応じて移相された信号を発生するも
ので、この位相制御回路12の出力は、電流形インバー
タ2の制御整流素子21〜24の点弧を行うゲート増巾
器13に与えられる。この電圧制御系は自動側、御系の
安定度を得るための遅れを持っており、この遅れは主と
して誤差増巾器11の比例積分回路によるものである。
An example of a conventional control circuit in the main circuit configuration of FIG. 1 is shown in the block diagram of FIG. 2. In FIG. 2, the same symbols as those in FIG. This is a reference signal generation circuit that generates a reference signal. The output of the reference signal generation circuit 7 controls the gate amplifier 8 which sends gate signals for the control rectifiers 33 and 34 of the voltage source inverter 3, and the firing period of the control rectifiers 21 to 24 of the current source inverter 2. The phase control circuit 12 determines the phase control signal according to the phase control signal. Reference numeral 9 denotes an output voltage detection circuit that detects the output voltage of the transformer 4. Its output is compared with the voltage setting signal of the voltage setting device 10 as an output voltage feedback signal, and the deviation is amplified by the error amplifier 11. be done. The output of the error amplifier 11 is applied to the phase control circuit 12 as a phase control signal. Phase control circuit 1
Reference numeral 2 generates a signal whose phase is shifted according to the level of the phase control signal using the signal from the reference signal generation circuit 7 as a reference. 21-24 to the gate amplifier 13 which performs the ignition. This voltage control system has a delay in order to obtain stability on the automatic side and in the control system, and this delay is mainly due to the proportional-integral circuit of the error amplifier 11.

ここで、出力電圧を一定に制御する場合の直流電源1の
直流電源電圧Elと、電圧形インバータ3の直流電圧E
3および電流形インバータ2の直流電圧(平均値)E2
の関係について述べる。出力電圧を一定にするためには
、電圧形インバータ3の直流電圧B3を一定にしなけれ
ばな、らない。また直流電圧E3と電流形インバータ2
の直流電圧E2の和が、直流電源電圧Elと等しく制御
する必要がある。このため直流電源電圧E1が増大する
と直流電圧E2も増大させ、直流電源電圧Blの低下に
つれて直流電圧E2を減少させるようζこ電流形インバ
ータ2の位E″I 相制御を行うと、直流電圧均を一定とすることができる
〇 第2図に示す従来の制御方式では負荷5が急増すると、
電流形インバータ2の動作上必要な平滑リアクトル6に
より、直流電源1からの電力供給に時間遅れを生じるが
、さらに誤差増巾器11の秋分作用によって遅れを生じ
るため、電圧形インバータ3の平滑コンデンサ31 、
32から電力が放出され、直流電圧E3が低下し、また
負荷5が急減した場合には直流電圧E3が上昇する。こ
れにより出力電圧も大きく変動する欠点があった。
Here, the DC power supply voltage El of the DC power supply 1 and the DC voltage E of the voltage source inverter 3 when controlling the output voltage to be constant.
3 and DC voltage (average value) of current source inverter 2 E2
I will explain the relationship between In order to keep the output voltage constant, the DC voltage B3 of the voltage source inverter 3 must be kept constant. Also, DC voltage E3 and current source inverter 2
It is necessary to control the sum of the DC voltages E2 to be equal to the DC power supply voltage El. Therefore, when the DC power supply voltage E1 increases, the DC voltage E2 also increases, and when the position E''I phase control of the current source inverter 2 is performed so that the DC voltage E2 decreases as the DC power supply voltage Bl decreases, the DC voltage is equalized. In the conventional control method shown in Fig. 2, when the load 5 suddenly increases,
The smoothing reactor 6 necessary for the operation of the current source inverter 2 causes a time delay in the power supply from the DC power source 1, but since the equinox effect of the error amplifier 11 causes a further delay, the smoothing capacitor of the voltage source inverter 3 31,
32, the DC voltage E3 decreases, and when the load 5 suddenly decreases, the DC voltage E3 increases. This has the disadvantage that the output voltage also fluctuates greatly.

本発明は上述の欠点を除去するためになされたもので、
電流形インバータと電圧形インバータを組合せた電力変
換装置において、負荷が急変した場合でも、出力電圧の
変動を極力抑え、交流出力電圧を所定の値に安定化する
ための電力変換装置の制御方式を提供せんきするもので
ある。
The present invention has been made to eliminate the above-mentioned drawbacks.
In a power converter that combines a current-source inverter and a voltage-source inverter, we developed a control method for the power converter that minimizes fluctuations in the output voltage and stabilizes the AC output voltage to a predetermined value even when the load changes suddenly. We are happy to provide this service.

以下、本発明を実施例図面にもとづいて説明する。第3
図は本発明による制御回路の一実施例を示すブロック図
である。第3図において第2図と同一符号のものは同一
機能のものを示し、14は電圧形インバータ3の直流電
圧E3を検出し微分する直流電圧微分回路、15はその
直流電圧微分回路14の出力と前記誤差増巾器11の出
力を合成する信号合成回路である。第3図で第2図と異
なる点は、第2図に示す誤差増巾器11と本発明によっ
て追加される直流電圧微分回路14の出力信号を合成す
る信号合成回路15を有し、この信号合成回路15の出
力信号を位相制御回路12の入力としている点である0 ここで直流電圧微分回路14は上述の如く電圧形インバ
ータ3の直流電圧E3の変化を微分でとらえることを目
的とし、第4図に該直流電圧微分回路14の入力信号と
なる電圧形インバータ3の直流電圧B3と、それに対す
る直流電圧微分回路14の出力の一例を示す。
Hereinafter, the present invention will be explained based on the drawings of the embodiments. Third
The figure is a block diagram showing one embodiment of a control circuit according to the present invention. In FIG. 3, the same symbols as in FIG. 2 indicate the same functions, 14 is a DC voltage differentiator circuit that detects and differentiates the DC voltage E3 of the voltage source inverter 3, and 15 is the output of the DC voltage differentiator circuit 14. This is a signal synthesis circuit that synthesizes the output of the error amplifier 11 and the output of the error amplifier 11. 3 differs from FIG. 2 in that it has a signal synthesis circuit 15 that synthesizes the output signals of the error amplifier 11 shown in FIG. 2 and the DC voltage differentiation circuit 14 added according to the present invention, and this signal The point is that the output signal of the synthesis circuit 15 is input to the phase control circuit 12. Here, the DC voltage differentiator circuit 14 has the purpose of differentiating the change in the DC voltage E3 of the voltage source inverter 3 as described above. FIG. 4 shows an example of the DC voltage B3 of the voltage source inverter 3, which is an input signal to the DC voltage differentiator 14, and the output of the DC voltage differentiator 14 corresponding thereto.

定常運転中は電圧形インバータ3の直流電圧B3は変動
がないので、直流電圧微分回路14の出力は零となって
いるため、電力変換装置の出力電圧は誤差増巾器11の
出力により一定に保たれる。
During steady operation, the DC voltage B3 of the voltage source inverter 3 does not fluctuate, so the output of the DC voltage differentiator 14 is zero, so the output voltage of the power converter is kept constant by the output of the error amplifier 11. It is maintained.

負荷5が急変すると、直流電圧E3も急変しようとする
が、直流電圧微分回路14が直ちに急変を検出して、信
号合成回路15の出力を変化せしめ、電流形インバータ
2の直流電圧B2を直ちに変化させる。すなわち負荷5
が急増すると、直流電圧E3が減少しようとするが、直
流電圧微分回路14の出力も減少し、時間遅れなく信号
合成回路15に作用し電流形インバータ2の直流電圧E
2を急速に小さくし、直流電源1からの電力供給を急増
させることにより直流電圧B3の低下ひいては出力電圧
の低下を抑制することができる。また負荷5が急減した
場合には、電流形インバータ2の直流電圧B2を急増さ
せ直流電源lからの電力供給を減少させるように動作す
る。直流電圧E3が安定すれば、前述の如く電力変換装
置の出力電圧は誤差増巾器11の出力により一定に制御
される。
When the load 5 suddenly changes, the DC voltage E3 also tries to change suddenly, but the DC voltage differentiation circuit 14 immediately detects the sudden change, changes the output of the signal synthesis circuit 15, and immediately changes the DC voltage B2 of the current source inverter 2. let i.e. load 5
When the voltage suddenly increases, the DC voltage E3 tries to decrease, but the output of the DC voltage differentiator 14 also decreases, and it acts on the signal synthesis circuit 15 without time delay, causing the DC voltage E of the current source inverter 2 to decrease.
2 and rapidly increase the power supply from the DC power supply 1, it is possible to suppress a decrease in the DC voltage B3 and, in turn, a decrease in the output voltage. Further, when the load 5 suddenly decreases, the DC voltage B2 of the current source inverter 2 is rapidly increased to reduce the power supply from the DC power source 1. Once the DC voltage E3 is stabilized, the output voltage of the power converter is controlled to be constant by the output of the error amplifier 11 as described above.

以上述べたように本発明によれば、負荷急変時における
出力電圧制御系の動作遅れによる電力変換装置の出力電
圧の変動を最小限化抑えることができ、しかも安定な電
圧を負荷5に供給することができる。
As described above, according to the present invention, it is possible to minimize fluctuations in the output voltage of the power conversion device due to the delay in operation of the output voltage control system when the load suddenly changes, and moreover, supply a stable voltage to the load 5. be able to.

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

第1図は電流形インバータと電圧形インバータを用いた
電力変換装置の主回路を示す図、第2図は第1図におけ
る従来の制御回路を示すブロック図、第3図は本発明の
一実施例を示す制御回路ブロック図である。 1・・・・・・直流電源、2・・・・・・電流形インバ
ータ、3・・・・・電圧形インバータ、4・・・・・変
圧器、5・・・・負荷、6・・・・・平滑リアクトル、
7・・・・基準信号発生回路、8.13・・・・・・ゲ
ート増巾器、9・・・・出力電圧検出回路、10・・・
・・・電圧設定器、11・・・・・・誤差増巾器、12
−・・・位相制御回路、14・・・・・・直流電圧微分
回路、15・・・・・・信号合成回路。 特許出願人 東洋電機製造株式会社 代表者 土 井 厚 第 t +ffi 手続補正書(方式) 昭和58年11月Iq日 特許庁長官 殿 1、事件の表示 昭和58年特詐願第130758号 2、発明の名称 電力変換装置の制御方式 3、補正をする者 事件との関係 特許出願人 郵便番号 104 東京都中央区八重洲二丁目7番2号 昭和58年10月25日 5、補正の対象 ツi ++111査弔6貝弗14イ丁目の10ツク7図
、である。−1を[ロック−jΣ −)“
Fig. 1 is a diagram showing the main circuit of a power conversion device using a current source inverter and a voltage source inverter, Fig. 2 is a block diagram showing a conventional control circuit in Fig. 1, and Fig. 3 is an embodiment of the present invention. FIG. 2 is a control circuit block diagram showing an example. 1...DC power supply, 2...Current source inverter, 3...Voltage source inverter, 4...Transformer, 5...Load, 6... ...smooth reactor,
7... Reference signal generation circuit, 8.13... Gate amplifier, 9... Output voltage detection circuit, 10...
... Voltage setting device, 11 ... Error amplifier, 12
-... Phase control circuit, 14... DC voltage differentiator circuit, 15... Signal synthesis circuit. Patent Applicant Toyo Denki Manufacturing Co., Ltd. Representative Atsushi Doi No. t +ffi Procedural Amendment (Method) November 1980 Iq Director General of the Patent Office 1, Indication of Case 1981 Special Fraud Application No. 130758 2, Invention Name of Control System for Power Converter Equipment 3, Relationship with the case of the person making the amendment Patent Applicant Zip Code 104 2-7-2 Yaesu, Chuo-ku, Tokyo October 25, 1982 5, Target of Amendment i ++111 This is Figure 7 of 10 Tsukku, 14th I-chome, 14th I-chome. −1 [lock −jΣ −)“

Claims (1)

【特許請求の範囲】[Claims] 電流形インバータ回路と電圧形インバータ回路より構成
され、該電圧形インバータの出力電圧を検出する出力電
圧検出器の出力と電圧設定との偏差を誤差増巾器に印加
し、該誤差増巾器の出力に応じて前記電流形インバータ
の動作位相を制御することにより前記電圧形インバータ
の直流電圧を制御して該電圧形インバータの出力電圧を
設定値に保持するようにした電力変換装置において、前
記電圧形インバータの直流電圧を検出し微分する微分回
路の出力と前記誤差増巾器の出力を合成する信号合成回
路を有し、該信号合成回路の出力に応じて前記電流形イ
ンバータの位相制御を行うことを特徴とする電力変換装
置の制御方式。
It consists of a current source inverter circuit and a voltage source inverter circuit, and the deviation between the output of the output voltage detector that detects the output voltage of the voltage source inverter and the voltage setting is applied to an error amplifier, In a power conversion device, the output voltage of the voltage source inverter is maintained at a set value by controlling the DC voltage of the voltage source inverter by controlling the operating phase of the current source inverter according to the output. The current source inverter has a signal synthesis circuit that synthesizes the output of a differentiation circuit that detects and differentiates the DC voltage of the current source inverter and the output of the error amplifier, and controls the phase of the current source inverter in accordance with the output of the signal synthesis circuit. A control method for a power conversion device characterized by the following.
JP58130758A 1983-07-20 1983-07-20 Control system of power converter Pending JPS6026466A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58130758A JPS6026466A (en) 1983-07-20 1983-07-20 Control system of power converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58130758A JPS6026466A (en) 1983-07-20 1983-07-20 Control system of power converter

Publications (1)

Publication Number Publication Date
JPS6026466A true JPS6026466A (en) 1985-02-09

Family

ID=15041943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58130758A Pending JPS6026466A (en) 1983-07-20 1983-07-20 Control system of power converter

Country Status (1)

Country Link
JP (1) JPS6026466A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592574A (en) * 1978-12-28 1980-07-14 Fuji Electric Co Ltd Control system for lead angle of inverter device
JPS57156681A (en) * 1981-03-24 1982-09-28 Toyo Electric Mfg Co Ltd Inverter device and controlling method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5592574A (en) * 1978-12-28 1980-07-14 Fuji Electric Co Ltd Control system for lead angle of inverter device
JPS57156681A (en) * 1981-03-24 1982-09-28 Toyo Electric Mfg Co Ltd Inverter device and controlling method thereof

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