JP3255304B2 - Control circuit for bidirectional power converter - Google Patents
Control circuit for bidirectional power converterInfo
- Publication number
- JP3255304B2 JP3255304B2 JP30480992A JP30480992A JP3255304B2 JP 3255304 B2 JP3255304 B2 JP 3255304B2 JP 30480992 A JP30480992 A JP 30480992A JP 30480992 A JP30480992 A JP 30480992A JP 3255304 B2 JP3255304 B2 JP 3255304B2
- Authority
- JP
- Japan
- Prior art keywords
- power
- converter
- bidirectional
- control circuit
- bidirectional power
- 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
Links
Landscapes
- Inverter Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は双方向電力変換装置の制
御回路に関するもので、さらに詳しく言えば、商用電源
からの深夜電力によって蓄電池を充電し、昼間または商
用電源の停電時に前記蓄電池からの直流電力を交流電力
に変換して負荷に供給するように構成されてなる双方向
電力変換装置の切り替え制御を安定に行うことができる
制御回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit for a bidirectional power converter, and more particularly, to charging a storage battery with midnight power from a commercial power supply, and supplying power from the storage battery in the daytime or during a power outage of the commercial power supply. The present invention relates to a control circuit that can stably perform switching control of a bidirectional power converter configured to convert DC power into AC power and supply the converted power to a load.
【０００２】[0002]
【従来の技術】商用電源からの深夜電力が利用できるロ
ードレベリングシステムには、前記深夜電力によって蓄
電池を充電するコンバータ動作と、昼間または商用電源
の停電時に前記蓄電池からの直流電力を交流電力に変換
して負荷に供給するインバータ動作とを行う双方向電力
変換装置が用いられている。2. Description of the Related Art A load leveling system that can use late-night power from a commercial power supply has a converter operation for charging a storage battery with the late-night power, and converts DC power from the storage battery into AC power during the daytime or during a power failure of the commercial power supply. A bidirectional power converter that performs an inverter operation to supply the load to a load is used.
【０００３】上記したロードレベリングシステムは、図
３に示したように、商用電源１がシステム入力スイッチ
２、マグネットスイッチ３を介して負荷４と双方向電力
変換装置５の一端に接続されるとともに、前記双方向電
力変換装置５の他端が蓄電池６に接続されてなり、商用
電源１からの深夜電力の受電時には、この深夜電力を負
荷４に供給するとともに、前記双方向電力変換装置５を
コンバータ動作させて前記蓄電池６を充電し、昼間また
は商用電源１の停電時には、前記双方向電力変換装５を
インバータ動作させて前記蓄電池６からの直流電力を交
流電力に変換して前記負荷４に供給するとともに、余剰
電力を商用電源１に戻すように構成したものである。In the above-described load leveling system, as shown in FIG. 3, a commercial power supply 1 is connected to a load 4 and one end of a bidirectional power converter 5 via a system input switch 2 and a magnet switch 3. The other end of the bidirectional power converter 5 is connected to a storage battery 6, and when the midnight power is received from the commercial power supply 1, the midnight power is supplied to the load 4 and the bidirectional power converter 5 is connected to the converter 4. The storage battery 6 is operated to charge the battery, and in the daytime or during a power outage of the commercial power supply 1, the bidirectional power converter 5 is operated as an inverter to convert DC power from the storage battery 6 into AC power and supply the AC power to the load 4. In addition, surplus electric power is returned to the commercial power supply 1.
【０００４】前記双方向電力変換装置５は前記マグネッ
トスイッチ３と負荷４との接続点から変換装置入力スイ
ッチ７、絶縁トランス８を介して接続され、この絶縁ト
ランス８と図２に示した変換装置５内の主変換部５０と
の間にはチョークコイル５１が介挿され、このチョーク
コイル５１と前記絶縁トランス８との間にはコンデンサ
５２が接続され、前記主変換部５０と蓄電池６との間に
はコンデンサ５３が接続されてなる。The bidirectional power converter 5 is connected from a connection point between the magnet switch 3 and the load 4 via a converter input switch 7 and an insulating transformer 8, and the insulating transformer 8 is connected to the converter shown in FIG. 5, a choke coil 51 is interposed between the choke coil 51 and the insulating transformer 8, and a capacitor 52 is connected between the choke coil 51 and the insulating transformer 8. A capacitor 53 is connected between them.
【０００５】上記の如き双方向電力変換装置５の主変換
部５０は、ブリッジ接続された４個のスイッチング素子
５０１，５０２，５０３，５０４から構成され、図２に
示した制御回路５４によって、コンバータ動作時は昇圧
形の高力率コンバータとして動作するように、インバー
タ動作時はブリッジ形のインバータとして動作するよう
に制御される。The main converter 50 of the bidirectional power converter 5 as described above is composed of four switching elements 501, 502, 503 and 504 connected in a bridge, and is controlled by the control circuit 54 shown in FIG. At the time of operation, it is controlled to operate as a boost type high power factor converter, and at the time of inverter operation, it is controlled to operate as a bridge type inverter.
【０００６】上記した制御回路５４の従来例としては、
双方向電力変換装置５の交流電流波形が交流電流検出器
５５によって検出され、その対応電圧が比較増幅器５４
１によって商用電源１と同一周波数で、同位相の基準正
弦波と比較増幅され、得られた比較出力はパルス幅変調
器５４２で数十ｋＨｚの鋸歯状波によってパルス幅変調
された後ベースドライブ回路５４３によって増幅されて
前記スイッチング素子５０１，５０２，５０３，５０４
の駆動信号を得ている。なお、５６は直流電流検出器で
ある。As a conventional example of the control circuit 54 described above,
The AC current waveform of the bidirectional power converter 5 is detected by an AC current detector 55, and the corresponding voltage is
1 and a reference sine wave having the same frequency and the same phase as that of the commercial power supply 1. The obtained comparison output is pulse width modulated by a pulse width modulator 542 with a sawtooth wave of several tens of kHz, and then a base drive circuit. The switching elements 501, 502, 503, 504
Is obtained. Reference numeral 56 denotes a DC current detector.
【０００７】このようにスイッチング素子５０１，５０
２，５０３，５０４を制御することによって双方向電力
変換装置５の交流電流波形を基準正弦波に一致させるよ
うに制御することができる。As described above, the switching elements 501 and 50
By controlling 2, 503 and 504, it is possible to control the alternating current waveform of the bidirectional power converter 5 to match the reference sine wave.
【０００８】なお、前記双方向電力変換装置５をコンバ
ータ動作させる時は基準正弦波を商用電源１の電圧波形
と同位相にすることによって、インバータ動作させる時
は基準正弦波を商用電源１の電圧波形と逆位相にするこ
とによって行うことができる。そして、コンバータ動作
時に基準正弦波の振幅を大きくすると、コンバータ出力
電流が増加して蓄電池６の端子電圧を上昇率を大きくす
ることができ、基準正弦波の振幅を小さくすると、コン
バータ出力電流が減少して蓄電池６の端子電圧の上昇率
を小さくすることができる。また、同様にインバータ動
作時に基準正弦波の振幅を変化させると、インバータ出
力電流が変化して蓄電池６の放電を制御することができ
る。When the bidirectional power converter 5 is operated as a converter, the reference sine wave is made to have the same phase as the voltage waveform of the commercial power supply 1. This can be done by making the phase opposite to the waveform. When the amplitude of the reference sine wave is increased during the converter operation, the converter output current increases and the terminal voltage of the storage battery 6 can be increased at a higher rate. When the amplitude of the reference sine wave decreases, the converter output current decreases. As a result, the rate of increase in the terminal voltage of the storage battery 6 can be reduced. Similarly, when the amplitude of the reference sine wave is changed during the operation of the inverter, the output current of the inverter is changed to control the discharge of the storage battery 6.
【０００９】[0009]
【発明が解決しようとする課題】上記した従来の双方向
電力変換装置の制御回路は、商用電源１の停電時に、双
方向電力変換装置５を商用電源１から切り離すためにマ
グネットスイッチ３をオフさせてから前記双方向電力変
換装置５をインバータ動作させて負荷４に交流電力を供
給するように動作するが、交流電流検出器５５によって
検出される交流電流の波形、すなわちインバータ出力電
流波形が基準正弦波と一致するように制御されるため、
負荷４がコンデンサインプット形のような非線形負荷で
ある場合は、該負荷４に負荷電流を供給することができ
なくなるという問題があった。The control circuit of the conventional bidirectional power converter described above turns off the magnet switch 3 to disconnect the bidirectional power converter 5 from the commercial power supply 1 when the commercial power supply 1 fails. After that, the bidirectional power converter 5 is operated as an inverter so as to supply AC power to the load 4. Controlled to match the waves,
When the load 4 is a non-linear load such as a capacitor input type, there is a problem that a load current cannot be supplied to the load 4.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、商用電源からの深夜電力の受電時はコン
バータ動作をして蓄電池を充電し、昼間または商用電源
の停電時は前記蓄電池からの直流電力を交流電力に変換
するインバータ動作をする双方向電力変換装置の制御回
路であって、前記双方向電力変換装置に停電検出器を設
け、双方向電力変換装置がコンバータ動作している時は
コンバータ入力電流を基準正弦波に一致させる電流モー
ド制御を行い、前記双方向電力変換装置が商用電源の受
電時にインバータ動作している時はインバータ出力電流
を前記基準正弦波に一致させる電流モード制御を行い、
前記停電検出器によって停電が検出された時に、停電信
号によってインバータ出力電圧を前記基準正弦波に一致
させる電圧モード制御に切り替えるようにしたことを特
徴とするものである。SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method for receiving power from a commercial power source at night.
Battery operation is performed by charging the battery during daytime or commercial power.
During a power outage, DC power from the storage battery is converted to AC power
A control circuit for a bidirectional power converter that performs an inverter operation that performs a power failure detector in the bidirectional power converter.
When the bidirectional power converter is operating as a converter, current mode control is performed to match the converter input current to the reference sine wave.When the bidirectional power converter is operating as an inverter when receiving commercial power, Perform current mode control to match the inverter output current with the reference sine wave ,
When a power failure is detected by the power failure detector,
Signal matches the inverter output voltage with the reference sine wave
This is characterized in that the mode is switched to voltage mode control to be performed .
【００１１】[0011]
【作 用】従って、本発明は、商用電源１の停電時にイ
ンバータ出力電圧が基準正弦波に一致するように制御さ
れるので、負荷４が非線形負荷であっても正常に負荷電
流を供給することができる。Therefore, according to the present invention, since the inverter output voltage is controlled to coincide with the reference sine wave when the commercial power supply 1 fails, the load current can be supplied normally even if the load 4 is a non-linear load. Can be.
【００１２】[0012]
【実施例】図１は、本発明の双方向電力変換装置の制御
回路のブロック図で、図２と同じ機能を有する部分には
同じ符号を付して以下の説明を省略する。FIG. 1 is a block diagram of a control circuit of a bidirectional power conversion device according to the present invention. Parts having the same functions as those in FIG.
【００１３】本発明の特徴は、絶縁トランス８と主変換
部５０との間に停電検出器５７を設け、この停電検出器
５７から停電信号が送出されると、切替回路５４４から
はコンデンサ５２の端子間電圧の対応電圧が出力される
とともに、基準正弦波が比較増幅器５４１に送出されて
双方向電力変換装置５をインバータ動作させ、インバー
タ出力電圧が基準正弦波に一致するように制御するもの
である。A feature of the present invention is that a power failure detector 57 is provided between the insulating transformer 8 and the main converter 50, and when a power failure signal is transmitted from the power failure detector 57, the switching circuit 544 outputs the power of the capacitor 52. A voltage corresponding to the inter-terminal voltage is output, and a reference sine wave is sent to the comparison amplifier 541 to operate the bidirectional power converter 5 as an inverter so that the inverter output voltage matches the reference sine wave. is there.
【００１４】なお、前記停電検出器５７は、商用電源１
の停電を検出して基準正弦波の位相を反転させるための
もので、商用電源１の停電時以外に双方向電力変換装置
５をインバータ動作させる場合は従来と同じ制御手段に
よって行い、通常は上記した切替回路５４４とともにマ
イクロコンピュータによって行うように構成されてい
る。The power failure detector 57 is connected to the commercial power source 1.
In order to invert the phase of the reference sine wave by detecting the power failure of the bidirectional power converter 5 when the commercial power supply 1 is not powered, the same control means as in the related art is used. It is configured to be performed by a microcomputer together with the changed switching circuit 544.
【００１５】[0015]
【発明の効果】上記した如く、本発明は、ロードレベリ
ングシステムなどに使用される双方向電力変換装置を、
商用電源の停電時にも安定に動作させることができる。As described above, the present invention provides a bidirectional power converter used for a load leveling system and the like.
It can be operated stably even in the event of a commercial power failure.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の双方向電力変換装置の制御回路のブロ
ック図である。FIG. 1 is a block diagram of a control circuit of a bidirectional power converter according to the present invention.
【図２】従来の双方向電力変換装置の制御回路のブロッ
ク図である。FIG. 2 is a block diagram of a control circuit of a conventional bidirectional power converter.
【図３】ロードレベリングシステムのブロック図であ
る。FIG. 3 is a block diagram of a load leveling system.
５ 双方向電力変換装置 ５４ 制御回路 ５７ 停電検出器 ５４４ 切替回路 5 bidirectional power converter 54 control circuit 57 power failure detector 544 switching circuit
Claims (1)
バータ動作をして蓄電池を充電し、昼間または商用電源
の停電時は前記蓄電池からの直流電力を交流電力に変換
するインバータ動作をする双方向電力変換装置の制御回
路であって、前記双方向電力変換装置に停電検出器を設
け、双方向電力変換装置がコンバータ動作している時は
コンバータ入力電流を基準正弦波に一致させる電流モー
ド制御を行い、前記双方向電力変換装置が商用電源の受
電時にインバータ動作している時はインバータ出力電流
を前記基準正弦波に一致させる電流モード制御を行い、
前記停電検出器によって停電が検出された時に、停電信
号によってインバータ出力電圧を前記基準正弦波に一致
させる電圧モード制御に切り替えるようにしたことを特
徴とする双方向電力変換装置の制御回路。1. When receiving midnight power from a commercial power supply,
Battery operation is performed by charging the battery during daytime or commercial power.
During a power outage, DC power from the storage battery is converted to AC power
A control circuit for a bidirectional power converter that performs an inverter operation that performs a power failure detector in the bidirectional power converter.
When the bidirectional power converter is operating as a converter, current mode control is performed to match the converter input current to the reference sine wave.When the bidirectional power converter is operating as an inverter when receiving commercial power, Perform current mode control to match the inverter output current with the reference sine wave ,
When a power failure is detected by the power failure detector,
Signal matches the inverter output voltage with the reference sine wave
A control circuit for a bidirectional power conversion device, wherein the control circuit switches to voltage mode control .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30480992A JP3255304B2 (en) | 1992-10-15 | 1992-10-15 | Control circuit for bidirectional power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30480992A JP3255304B2 (en) | 1992-10-15 | 1992-10-15 | Control circuit for bidirectional power converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06133565A JPH06133565A (en) | 1994-05-13 |
| JP3255304B2 true JP3255304B2 (en) | 2002-02-12 |
Family
ID=17937516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30480992A Expired - Lifetime JP3255304B2 (en) | 1992-10-15 | 1992-10-15 | Control circuit for bidirectional power converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3255304B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012043745A1 (en) * | 2010-09-29 | 2012-04-05 | 三洋電機株式会社 | Charging control unit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100322763B1 (en) * | 1999-11-11 | 2002-02-07 | 장명언 | charger contained inverting function |
| JPWO2012043138A1 (en) * | 2010-09-29 | 2014-02-06 | 三洋電機株式会社 | Power system |
| CN103051242A (en) * | 2012-12-27 | 2013-04-17 | 青岛盛嘉信息科技有限公司 | Bidirectional rectifying and boosting circuit |
| CN107677894B (en) * | 2017-10-16 | 2024-02-06 | 广东东方电讯科技有限公司 | Nonlinear load power output device |
-
1992
- 1992-10-15 JP JP30480992A patent/JP3255304B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012043745A1 (en) * | 2010-09-29 | 2012-04-05 | 三洋電機株式会社 | Charging control unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06133565A (en) | 1994-05-13 |
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