JPH09224377A - Parallel operation system of different kinds of constant-voltage constant-frequency inverters - Google Patents
Parallel operation system of different kinds of constant-voltage constant-frequency invertersInfo
- Publication number
- JPH09224377A JPH09224377A JP8028941A JP2894196A JPH09224377A JP H09224377 A JPH09224377 A JP H09224377A JP 8028941 A JP8028941 A JP 8028941A JP 2894196 A JP2894196 A JP 2894196A JP H09224377 A JPH09224377 A JP H09224377A
- Authority
- JP
- Japan
- Prior art keywords
- value control
- instantaneous value
- parallel
- inverter device
- average value
- 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
Links
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、平均値制御の定電
圧定周波数インバータと瞬時値制御の定電圧定周波数イ
ンバータとの並列運転方式に関し、特に、それぞれ同一
制御方式同士での並列運転が可能なインバータの異機種
並列運転方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parallel operation method of a constant voltage constant frequency inverter for average value control and a constant voltage constant frequency inverter for instantaneous value control, and in particular, it is possible to perform parallel operation between the same control methods. Different type parallel operation method of various inverters.
【０００２】[0002]
【従来の技術】顧客設備の負荷容量の増大に伴い、既設
の定電圧定周波数インバータ装置に、新たにインバータ
装置を増設する必要が生じ、この際、既設の設備と現行
製造機種の関係から、制御方式の異なるインバータ装置
を増設し並列運転する場合がある。インバータ装置の並
列運転では、各インバータ装置間に流れる、出力電流の
横流を抑制する必要があり、従来、インバータの異機種
並列運転時の横流の抑制方法として、（１）各インバー
タの出力にリアクトル等を挿入する方法（特開平1−298
960 号公報）、（２）既設のインバータ装置出力を検出
し、既設のインバータ装置出力に新設インバータ装置の
出力を合わせる方法（特開昭60−20771 号公報）などが
ある。2. Description of the Related Art As the load capacity of customer equipment increases, it becomes necessary to newly install an inverter device on an existing constant voltage constant frequency inverter device. At this time, due to the relationship between the existing equipment and the currently manufactured model, Inverter devices with different control systems may be added and operated in parallel. In the parallel operation of the inverter devices, it is necessary to suppress the cross current of the output current flowing between the inverter devices. Conventionally, as a method of suppressing the cross current during the parallel operation of different models of inverters, (1) the reactor output to each inverter is used. Etc. (Japanese Patent Application Laid-Open No. 1-2981)
960) and (2) a method of detecting the output of an existing inverter device and matching the output of the new inverter device with the output of the existing inverter device (Japanese Patent Laid-Open No. 60-20771).
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記従来技術
（１）では、リアクトル等を挿入する方法は、この挿入
したリアクトル電圧降下の為に、インバータ装置出力の
電圧変動率が悪化する傾向があった。However, in the above-mentioned prior art (1), the method of inserting the reactor or the like tends to deteriorate the voltage fluctuation rate of the output of the inverter device due to the voltage drop of the inserted reactor. It was
【０００４】また、上記従来技術（２）の新設インバー
タ装置の出力を合わせる方法は、既設の設備に並列運転
を行う機能が全く無い場合にさえも、並列運転を可能と
するものであり、その分、新設の設備に多くの加工を必
要とした。Further, the method of adjusting the output of the newly installed inverter device of the above prior art (2) enables parallel operation even when the existing equipment has no function of performing parallel operation. Therefore, a lot of processing was required for the new equipment.
【０００５】本発明の目的は、平均値制御のインバータ
装置と瞬時値制御のインバータ装置との並列運転の際
に、簡単な構成で、インバータ装置間に流れる横流を抑
制し、装置出力の電圧変動率を良好に保つことにある。An object of the present invention is to suppress a cross current flowing between the inverter devices with a simple structure and to suppress a voltage fluctuation of the device output when the average value control inverter device and the instantaneous value control inverter device are operated in parallel. To keep the rate good.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
の本発明の特徴は、平均値制御で制御され、同一制御方
式同士では並列運転可能なインバータ装置と、瞬時値制
御で制御され、同一制御方式同士では並列運転可能なイ
ンバータ装置での並列運転において、電流分担の為の平
均値制御系の信号を並列運転する全てのインバータ装置
で共有し、電流分担の為の瞬時値制御系の信号を並列運
転する瞬時値制御のインバータ装置で共有し、瞬時値制
御のインバータ装置出力電圧をリアクトルを介して負荷
に出力し、さらに、平均値制御のインバータ装置出力電
圧を直接負荷に接続することにある。The features of the present invention for achieving the above-mentioned object are that an inverter device that is controlled by average value control and that can be operated in parallel by the same control method and that is controlled by instantaneous value control are the same. In parallel operation with inverter devices that can operate in parallel between control systems, the signal of the average value control system for current sharing is shared by all inverter devices that operate in parallel, and the signal of the instantaneous value control system for current sharing is shared. Are shared by the inverters for instantaneous value control that operate in parallel, the inverter output voltage for instantaneous value control is output to the load via the reactor, and the inverter output voltage for average value control is directly connected to the load. is there.
【０００７】一般に、平均値制御のインバータは、基本
波周波数の電流に対して出力インピーダンスが低く、高
調波電流に対して出力インピーダンスが高くなる傾向が
ある。これに対して、瞬時値制御のインバータは基本波
の電流に対して出力インピーダンスが低いだけでなく、
高調波の電流に対しても出力インピーダンスが低いとい
う傾向がある。Generally, an average value controlled inverter tends to have a low output impedance with respect to a current of a fundamental frequency and a high output impedance with respect to a harmonic current. On the other hand, the instantaneous value control inverter not only has a low output impedance with respect to the current of the fundamental wave,
The output impedance also tends to be low with respect to harmonic currents.
【０００８】このような性質の異なる電源を並列運転す
るために、まず、出力インピーダンスの低いインバータ
と負荷の間にリアクトルを挿入し、インバータの出力イ
ンピーダンスを一旦高くし、次に、各インバータとの間
で、基本波電流分担の平均値制御を行い、挿入したリア
クトルのために高くなった出力インピーダンスのうち、
基本波周波数でのインピーダンスの値を低くすることに
よって異機種並列運転を可能とする。In order to operate the power supplies having different characteristics in parallel, first, a reactor is inserted between the inverter having a low output impedance and the load to temporarily increase the output impedance of the inverter, and then the Among the output impedances that increased due to the inserted reactor, average value control of the fundamental wave current sharing was performed between
Different models can be operated in parallel by lowering the impedance value at the fundamental frequency.
【０００９】電流分担の為の、平均値制御系の信号を並
列運転する全ての制御方式のインバータ装置で共用し、
各インバータ装置の出力電圧の基本波の振幅と位相を制
御することによって、各装置の出力電流の基本波成分の
振幅と位相を一致させる。これにより、インバータ装置
間に流れる基本波成分の横流を抑制する。The signals of the average value control system for sharing the current are shared by the inverter devices of all control systems which are operated in parallel,
By controlling the amplitude and phase of the fundamental wave of the output voltage of each inverter device, the amplitude and phase of the fundamental wave component of the output current of each device are matched. This suppresses the lateral flow of the fundamental wave component flowing between the inverter devices.
【００１０】電流分担の為の、瞬時値制御系の信号を並
列運転する瞬時値制御のインバータ装置で共有すること
によって、各瞬時値制御方式のインバータ装置の出力電
圧の瞬時値を制御し、各瞬時値制御方式の装置間に流れ
る横流の高調波成分を抑制する。The signals of the instantaneous value control system for sharing the current are shared by the inverter devices of the instantaneous value control which are operated in parallel to control the instantaneous value of the output voltage of the inverter device of each instantaneous value control system, Suppresses the harmonic component of the cross current flowing between the devices of the instantaneous value control system.
【００１１】瞬時値制御のインバータ装置出力電圧をリ
アクトルを介して負荷に出力することによって、瞬時値
制御方式のインバータ装置の内部インピーダンスを増加
させ、並列に接続される平均値制御のインバータ装置か
ら流入する高調波成分の横流を抑制する。By outputting the output voltage of the inverter device of the instantaneous value control to the load through the reactor, the internal impedance of the inverter device of the instantaneous value control system is increased so that the inverter device of the average value control connected in parallel flows. It suppresses the cross current of the harmonic components.
【００１２】平均値制御のインバータ装置出力電圧を直
接負荷に接続することによって、平均値制御のインバー
タ装置による負荷端の出力電圧の制御を可能にし、イン
バータ装置全体の出力電圧の基本波成分の電圧変動率を
良好に保つ。By connecting the output voltage of the average value controlled inverter device directly to the load, the output voltage at the load end can be controlled by the average value controlled inverter device, and the voltage of the fundamental wave component of the output voltage of the entire inverter device can be controlled. Keep good volatility.
【００１３】[0013]
【発明の実施の形態】図１に本発明の一実施例の回路ブ
ロック図を示す。図１において、１，２は平均値制御の
定電圧定周波数インバータ装置、３，４は瞬時値制御の
定電圧定周波数インバータ装置、５は負荷、６，７は高
調波横流抑制の為のリアクトル、８〜１１は出力電圧の
振幅と周波数を調節し、横流の基本波成分を抑制する平
均値分担電流制御器、１２，１３は出力電圧の瞬時値を
調節し、横流の高調波成分を抑制する瞬時値分担電流制
御器、１４は基本波電流分担の為の平均値制御系の信号
線、１５は電流分担の為の瞬時値制御系の信号線、をそ
れぞれ表す。FIG. 1 shows a circuit block diagram of an embodiment of the present invention. In FIG. 1, 1 and 2 are constant voltage constant frequency inverter devices for average value control, 3 and 4 are constant voltage constant frequency inverter devices for instantaneous value control, 5 is a load, and 6 and 7 are reactors for suppressing harmonic cross current. , 8-11 adjust the amplitude and frequency of the output voltage and suppress the cross-current fundamental wave component, the average value sharing current controller, 12, 13 adjust the instantaneous value of the output voltage, suppress the cross-current harmonic component. The reference numeral 14 represents an instantaneous value sharing current controller, 14 represents a signal line of an average value control system for sharing a fundamental wave current, and 15 represents a signal line of an instantaneous value control system for sharing a current.
【００１４】ここで、平均値制御のインバータ装置１，
２は、出力電圧の振幅と周波数を制御することによっ
て、出力電圧の調整と基本波成分の横流の抑制を行う機
能を有している。また、瞬時値制御のインバータ装置
３，４は出力電圧の振幅と周波数を制御することによっ
て、出力電圧の調整と基本波成分の横流の抑制を行うと
同時に、出力電圧の瞬時値を制御することによって、出
力電圧の瞬時値の調整と高調波成分の横流の抑制を行う
機能を有している。Here, the average value control inverter device 1,
2 has a function of adjusting the output voltage and suppressing the cross current of the fundamental wave component by controlling the amplitude and frequency of the output voltage. The instantaneous value control inverter devices 3 and 4 control the output voltage amplitude and frequency to adjust the output voltage and suppress the cross current of the fundamental wave component, and at the same time control the instantaneous value of the output voltage. Has a function of adjusting the instantaneous value of the output voltage and suppressing the cross current of the harmonic component.
【００１５】平均値制御のインバータ１，２は負荷５に
直接接続されている為、負荷５の電圧は、インバータ
１，２によって直接制御が可能であり、電圧変動率が良
好な出力を得る。Since the average value controlled inverters 1 and 2 are directly connected to the load 5, the voltage of the load 5 can be directly controlled by the inverters 1 and 2, and an output having a good voltage fluctuation rate can be obtained.
【００１６】瞬時値制御のインバータ３，４はリアクト
ル６，７を介して、負荷５と平均値制御のインバータ
１，２に接続され、このリアクトル６，７は瞬時値制御
のインバータ３，４に流れ込む高調は成分の横流を抑制
する。The instantaneous value control inverters 3 and 4 are connected to the load 5 and the average value control inverters 1 and 2 via the reactors 6 and 7, and the reactors 6 and 7 are connected to the instantaneous value control inverters 3 and 4. The harmonics flowing in suppress the cross flow of the component.
【００１７】平均値分担電流制御器８〜１１は、平均値
制御のインバータ１，２及び瞬時値制御のインバータ
３，４のそれぞれに設けられ、基本波電流分担の為の平
均値制御系の信号線１４で相互に接続される。そして、
平均値分担電流制御器は各インバータ装置１〜４の出力
電圧の基本波の振幅と位相を制御し、各インバータ装置
１〜４の出力電流の位相と振幅を合わせると同時に、リ
アクトル６，７で生じる基本波周波数成分の電圧降下を
補償する。The average value sharing current controllers 8 to 11 are provided in each of the average value controlling inverters 1 and 2 and the instantaneous value controlling inverters 3 and 4, and are signals of the average value controlling system for sharing the fundamental wave current. Connected to each other by line 14. And
The average value sharing current controller controls the amplitude and phase of the fundamental wave of the output voltage of each of the inverter devices 1 to 4, and adjusts the phase and amplitude of the output current of each of the inverter devices 1 to 4 at the same time as the reactors 6 and 7. Compensate the resulting voltage drop of the fundamental frequency component.
【００１８】瞬時値分担電流制御器１２，１３は、瞬時
値制御のインバータ３，４のそれぞれに設けられ、瞬時
電流分担の為の瞬時値制御系の信号線１５，１６で相互
に接続される。そして、瞬時値分担電流制御器は瞬時値
制御のインバータ３，４の瞬時出力電圧を制御し、瞬時
値制御のインバータ３，４間の横流を抑制する。The instantaneous value sharing current controllers 12 and 13 are respectively provided in the inverters 3 and 4 for controlling the instantaneous value, and are connected to each other by the signal lines 15 and 16 of the instantaneous value control system for sharing the instantaneous current. . Then, the instantaneous value sharing current controller controls the instantaneous output voltage of the instantaneous value controlled inverters 3 and 4 to suppress the cross current between the instantaneous value controlled inverters 3 and 4.
【００１９】上記実施例の他にも、本発明は出力インピ
ーダンスの特性が異なる電源の並列運転に適用可能であ
る。In addition to the above embodiments, the present invention can be applied to parallel operation of power sources having different output impedance characteristics.
【００２０】[0020]
【発明の効果】本発明によれば、平均値制御の定電圧定
周波数インバータと瞬時値制御の定電圧定周波数インバ
ータとの並列運転の際、各インバータ間の横流を抑制
し、かつ出力の電圧変動率を良好に保つことが出来る。According to the present invention, in parallel operation of a constant voltage constant frequency inverter for average value control and a constant voltage constant frequency inverter for instantaneous value control, cross current between the inverters is suppressed and the output voltage is reduced. The fluctuation rate can be kept good.
【図１】本発明の一実施例の回路ブロック図である。FIG. 1 is a circuit block diagram of one embodiment of the present invention.
１，２…平均値制御の定電圧定周波数インバータ装置、
３，４…瞬時値制御の定電圧定周波数インバータ装置、
５…負荷、６，７…高調波横流抑制の為のリアクトル、
８〜１１…出力電圧の振幅と周波数を調節し、横流の基
本波成分を抑制する平均値分担電流制御器、１２，１３
…出力電圧の瞬時値を調節し、横流の高調波成分を抑制
する瞬時値分担電流制御器、１４…基本波電流分担の為
の、平均値制御系の信号線、１５，１６…電流分担の為
の、瞬時値制御系の信号線。1, 2 ... Average value controlled constant voltage constant frequency inverter device,
3, 4 ... Constant voltage constant frequency inverter device for instantaneous value control,
5 ... Load, 6, 7 ... Reactor for suppressing harmonic cross current,
8 to 11 ... Average value sharing current controller for adjusting amplitude and frequency of output voltage and suppressing fundamental wave component of cross current, 12, 13
… Instantaneous value sharing current controller that adjusts the instantaneous value of output voltage and suppresses cross current harmonic components, 14… Signal line of average value control system for sharing fundamental wave current, 15, 16… Signal line for the instantaneous value control system.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 黒坂 良一 茨城県日立市幸町三丁目１番１号 株式会 社日立製作所日立工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoichi Kurosaka 3-1-1 1-1 Saiwaicho, Hitachi-shi, Ibaraki Hitachi Ltd. Hitachi factory
Claims (3)
では並列運転可能な定電圧定周波数インバータ装置と、
瞬時値制御で制御され、同一制御方式同士では並列運転
可能な定電圧定周波数インバータ装置との並列運転方式
において、 前記瞬時値制御のインバータ装置の出力をリアクトルを
介して負荷に接続し、前記平均値制御のインバータ装置
の出力を直接前記負荷に接続し、電流分担の為の平均値
制御系の信号を並列運転する全てのインバータ装置で共
有し、電流分担の為の瞬時値制御系の信号を並列運転す
る瞬時値制御のインバータ装置で共有することを特徴と
する定電圧定周波数インバータの異機種並列運転方式。1. A constant voltage constant frequency inverter device which is controlled by average value control and can be operated in parallel by the same control method,
In the parallel operation method with the constant voltage constant frequency inverter device which is controlled by the instantaneous value control and can be operated in parallel between the same control methods, the output of the inverter device of the instantaneous value control is connected to the load through the reactor, and the average The output of the value control inverter device is directly connected to the load, and the signal of the average value control system for current sharing is shared by all the inverter devices operating in parallel, and the signal of the instantaneous value control system for current sharing is shared. A parallel operation method for different models of constant voltage constant frequency inverters, which is shared by the inverters for instantaneous value control that operate in parallel.
バータ装置及び前記平均値制御のインバータ装置のそれ
ぞれには、前記瞬時値制御のインバータ装置及び前記平
均値制御のインバータ装置の出力電圧の基本波の振幅と
位相を制御し、各インバータ装置の出力電流の位相と振
幅を合わせ、前記リアクトルで生じる基本波周波数成分
の電圧降下を補償する平均値分担電流制御器が設けら
れ、前記平均値分担電流制御器同士は平均値制御系の信
号線で相互に接続されることを特徴とする定電圧定周波
数インバータの異機種並列運転方式。2. The basic output voltage of the instantaneous value control inverter device and the average value control inverter device in each of the instantaneous value control inverter device and the average value control inverter device according to claim 1. Control the amplitude and phase of the wave, match the phase and amplitude of the output current of each inverter device, an average value sharing current controller that compensates the voltage drop of the fundamental wave frequency component generated in the reactor is provided, the average value sharing Current controller is connected to each other by the signal line of average value control system. Different type parallel operation method of constant voltage constant frequency inverter.
バータ装置は複数個設けられ、瞬時値制御のインバータ
装置のそれぞれには、その瞬時出力電圧を制御し、複数
の瞬時値制御のインバータ間の横流を抑制する瞬時値分
担電流制御器が設けられ、前記瞬時値分担電流制御器同
士は瞬時値制御系の信号線で相互に接続されることを特
徴とする定電圧定周波数インバータの異機種並列運転方
式。3. The instantaneous value control inverter device according to claim 1, wherein a plurality of instantaneous value control inverter devices are provided, and each of the instantaneous value control inverter devices controls an instantaneous output voltage thereof. Is provided with an instantaneous value sharing current controller that suppresses the cross current, and the instantaneous value sharing current controllers are connected to each other by a signal line of an instantaneous value control system. Parallel operation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8028941A JPH09224377A (en) | 1996-02-16 | 1996-02-16 | Parallel operation system of different kinds of constant-voltage constant-frequency inverters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8028941A JPH09224377A (en) | 1996-02-16 | 1996-02-16 | Parallel operation system of different kinds of constant-voltage constant-frequency inverters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09224377A true JPH09224377A (en) | 1997-08-26 |
Family
ID=12262441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8028941A Pending JPH09224377A (en) | 1996-02-16 | 1996-02-16 | Parallel operation system of different kinds of constant-voltage constant-frequency inverters |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09224377A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006311734A (en) * | 2005-04-28 | 2006-11-09 | Origin Electric Co Ltd | Operating method of power supply device and power supply device |
| JP2018061394A (en) * | 2016-10-07 | 2018-04-12 | 富士電機株式会社 | Power conversion device and power conversion system |
| CN113990625A (en) * | 2021-11-03 | 2022-01-28 | 浙江飞旋科技有限公司 | High-frequency large-capacity power electronic unit parallel device and carrier multiplexing method |
-
1996
- 1996-02-16 JP JP8028941A patent/JPH09224377A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006311734A (en) * | 2005-04-28 | 2006-11-09 | Origin Electric Co Ltd | Operating method of power supply device and power supply device |
| JP2018061394A (en) * | 2016-10-07 | 2018-04-12 | 富士電機株式会社 | Power conversion device and power conversion system |
| CN113990625A (en) * | 2021-11-03 | 2022-01-28 | 浙江飞旋科技有限公司 | High-frequency large-capacity power electronic unit parallel device and carrier multiplexing method |
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