JPH05292679A - Power converter - Google Patents
Power converterInfo
- Publication number
- JPH05292679A JPH05292679A JP4090421A JP9042192A JPH05292679A JP H05292679 A JPH05292679 A JP H05292679A JP 4090421 A JP4090421 A JP 4090421A JP 9042192 A JP9042192 A JP 9042192A JP H05292679 A JPH05292679 A JP H05292679A
- Authority
- JP
- Japan
- Prior art keywords
- power
- power converter
- battery
- converter
- switch
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Hybrid Cells (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、完全放電形電力貯蔵用
電池による電力貯蔵システムにおける直流−交流電力変
換のための電力変換装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter for DC-AC power conversion in a power storage system using a fully discharged power storage battery.
【０００２】[0002]
【従来の技術】完全放電形電池を利用した電力貯蔵シス
テムを図２に示す。亜鉛−臭素電池や亜鉛−塩素電池等
の完全放電形電池１は、初期にはその電圧が零にあるた
め零電圧からの充電のための充電用電力変換器２が設け
られる。2. Description of the Related Art FIG. 2 shows a power storage system using a fully discharged battery. Since a completely discharged battery 1 such as a zinc-bromine battery or a zinc-chlorine battery has an initial voltage of zero, a charging power converter 2 for charging from zero voltage is provided.
【０００３】この電力変換器２は、電池１の初期充電の
ため比較的小容量のものにされ、サイリスタを交流−直
流変換スイッチ素子とする電流形他励式電力変換器にさ
れるが、無効電力も制御可能な自己消弧形素子を用いた
電流形自励式電力変換器の方式にすることもできる。This power converter 2 has a relatively small capacity for initial charging of the battery 1, and is a current type separately excited power converter using a thyristor as an AC-DC conversion switch element. It is also possible to adopt a current type self-excited power converter system using a self-extinguishing element that can be controlled.
【０００４】電池１の初期充電完了後、比較的大電流の
充放電のための電圧形自励式電力変換器３が設けられ
る。この電力変換器３は、電池１の充電と電力系統への
放電を行う双方向性を持ち、系統の有効電力のみでなく
無効電力も同時に制御し、また電流形電力変換器に較べ
て系統へ流出する高調波の量を低減できる構成にされ
る。After the initial charging of the battery 1 is completed, a voltage type self-excited power converter 3 for charging and discharging a relatively large current is provided. This power converter 3 has bidirectionality for charging the battery 1 and discharging it to the power system, and controls not only active power of the system but also reactive power at the same time. The configuration is such that the amount of harmonics flowing out can be reduced.
【０００５】次に、電力変換器３による電池１の放電運
転後、電池１の電圧が低下し、これ以上の電力供給が不
可能となる電圧まで電池１が放電されたとき、電力変換
器３の運転停止を行う。このとき、電池１の完全放電の
ための完全放電用電力変換器４が設けられており、電流
形にされる電力変換器４によって電池１を零電圧あるい
はマイナス電位まで放電を行う。Next, when the voltage of the battery 1 drops after the discharge operation of the battery 1 by the power converter 3 and the battery 1 is discharged to a voltage at which power cannot be supplied any more, the power converter 3 Stop the operation of. At this time, the complete-discharging power converter 4 for complete discharging of the battery 1 is provided, and the battery 1 is discharged to a zero voltage or a negative potential by the current-type power converter 4.
【０００６】図中、５，６は直流スイッチ、７，８は交
流スイッチ、９，１０はトランスである。In the figure, 5 and 6 are DC switches, 7 and 8 are AC switches, and 9 and 10 are transformers.
【０００７】[0007]
【発明が解決しようとする課題】従来の電力貯蔵システ
ムにおいては、電池１の完全放電と、初期充電のための
電力変換器２，４と電力融通のための電力変換器３とか
ら成る３つの電力変換器を必要とする。さらに、付属回
路要素としてトランス９，１０や直流，交流スイッチ５
〜８が電力変換器別に必要となる。In the conventional power storage system, the three types of power converters 2 and 4 for complete discharge and initial charging of the battery 1 and the power converter 3 for power interchange are provided. Requires a power converter. Furthermore, transformers 9 and 10 and DC and AC switches 5 are included as accessory circuit elements.
8 are required for each power converter.
【０００８】このため、電力変換装置としては、設備構
成を複雑，高価にし、また設置スペースを大きくし、さ
らには部品点数を多くして信頼性を低下させる問題があ
った。As a result, the power conversion device has a problem in that the equipment structure is complicated and expensive, the installation space is large, and the number of parts is large, resulting in a decrease in reliability.
【０００９】本発明の目的は、上述の課題を解決した電
力変換装置を提供することにある。An object of the present invention is to provide a power conversion device that solves the above problems.
【００１０】[0010]
【課題を解決するための手段】本発明は、完全放電形電
力貯蔵用電池によって電力系統との間で電力融通する電
力貯蔵システムにおいて、自己消弧形半導体スイッチの
ブリッジ回路とダイオードブリッジ回路を主回路として
直流−交流電力変換と交流−直流電力変換及び双方向電
力変換の各運転モードで運転される電力変換器と、前記
電力変換器の直流出力で電池を電流制御で初期充電及び
完全放電するときに該電力変換器と電池間に介装される
直流リアクトルと、前記電力変換器の運転モードに応じ
て該電力変換器と電池との間の極性切り換えを行うスイ
ッチと、を備えたことを特徴とする。SUMMARY OF THE INVENTION The present invention mainly provides a bridge circuit and a diode bridge circuit of a self-arc-extinguishing semiconductor switch in a power storage system in which electric power is exchanged with a power system by a battery for complete discharge type power storage. As a circuit, a power converter operated in each operation mode of DC-AC power conversion, AC-DC power conversion, and bidirectional power conversion, and a DC output of the power converter for initial charging and complete discharge of a battery by current control. A DC reactor that is sometimes interposed between the power converter and the battery, and a switch that switches the polarity between the power converter and the battery according to the operation mode of the power converter are provided. Characterize.
【００１１】[0011]
【作用】１台の電力変換器に直流−交流電力変換と交流
−直流電力変換及び双方向電力変換の各運転モードで運
転できるようにし、この電力変換器に直流リアクトルを
介装することで電流形のコンバータ又はインバータとし
て動作させて電池の初期充電と完全放電を行い、直流リ
アクトルを切り離すことで電圧形コンバータ又はインバ
ータとして動作させて電池と電力系統側との間で電力融
通を行う。Operation: A single power converter can be operated in each operation mode of DC-AC power conversion, AC-DC power conversion, and bidirectional power conversion, and a DC reactor is inserted in this power converter to supply current. Type converter or inverter to perform initial charging and complete discharge of the battery, and the DC reactor is disconnected to operate as a voltage type converter or inverter to exchange power between the battery and the power system side.
【００１２】[0012]
【実施例】図１は本発明の一実施例を示す回路図であ
る。本実施例は１台の電力変換器１１によって電池１の
初期充電と完全放電及び電力融通を行う構成にされる。FIG. 1 is a circuit diagram showing an embodiment of the present invention. In this embodiment, one power converter 11 is used to perform initial charging, complete discharging, and power interchange of the battery 1.
【００１３】電力変換器１１は、三相ブリッジ構成のＧ
ＴＯサイリスタＴＨU〜ＴＨZと三相ブリッジ構成のダイ
オードＤ1〜Ｄ6を主回路構成とし、制御回路ＣＮＴによ
って双方向電力変換制御がなされる。サイリスタブリッ
ジとダイオードブリッジは直流側でスイッチ１２を介し
て並列接続可能にされ、また、交流側は直接に並列接続
されトランス１３と開閉スイッチ１４を介して電力系統
側に接続される。The power converter 11 is a G having a three-phase bridge structure.
The TO thyristors TH U to TH Z and the diodes D 1 to D 6 having a three-phase bridge configuration are the main circuit configuration, and bidirectional power conversion control is performed by the control circuit CNT. The thyristor bridge and the diode bridge can be connected in parallel via the switch 12 on the DC side, and the AC side is directly connected in parallel and connected to the power system side via the transformer 13 and the opening / closing switch 14.
【００１４】電力変換器１１と電池１間には極性切り換
えのためのスイッチ１５，１６，１７，１８と、電圧形
と電流形切り換えのためのスイッチ１９と直流リアクト
ル２０が設けられ、各スイッチ１５〜１９はスイッチ１
２，１４と共に制御回路ＣＮＴの運転モードに応じて開
閉制御される。コンデンサ２１は主に電力変換器１１が
コンバータ運転されるときの平滑手段になる。Between the power converter 11 and the battery 1, switches 15, 16, 17, 18 for switching polarities, a switch 19 for switching between voltage type and current type, and a DC reactor 20 are provided. ~ 19 is switch 1
Opening / closing control is performed in accordance with the operation mode of the control circuit CNT together with 2 and 14. The capacitor 21 mainly serves as a smoothing means when the power converter 11 is operating as a converter.
【００１５】本実施例の動作を以下に説明する。The operation of this embodiment will be described below.
【００１６】（１）初期充電モード 電池１を完全放電状態から初期充電するため、スイッチ
１２，１５，１６，１９をオフ状態にし、他のスイッチ
をオン状態にし、電力変換器１１を電流形自励式コンバ
ータとして運転する。(1) Initial charging mode In order to initially charge the battery 1 from the completely discharged state, the switches 12, 15, 16, 19 are turned off, the other switches are turned on, and the power converter 11 is switched to the current source mode. Operates as an excitation converter.
【００１７】これにより、電力系統側からの交流入力を
サイリスタブリッジの順変換動作によって直流電力に変
換し、スイッチ１７→電池１→スイッチ１８→直流リア
クトル２０の経路で電流制御した充電を行い、電池１を
完全放電状態から所期の電圧まで充電する。As a result, the AC input from the power system side is converted into DC power by the forward conversion operation of the thyristor bridge, and charging is performed by controlling the current through the route of switch 17 → battery 1 → switch 18 → DC reactor 20, 1 is charged from a completely discharged state to a desired voltage.
【００１８】（２）電力融通モード 電池１の初期充電によってその電圧が電力融通可能な電
圧まで上昇すると、充電運転を一旦停止し、スイッチ１
２，１５，１６，１９をオン状態にし、他のスイッチ１
７，１８をオフ状態にし、電力変換器１１を双方向電圧
形自励式インバータとして運転する。(2) Electric power interchange mode When the voltage of the battery 1 rises to a voltage at which electric power can be accommodated by the initial charging, the charging operation is temporarily stopped and the switch 1
2, 15, 16 and 19 are turned on and other switches 1
7 and 18 are turned off, and the power converter 11 is operated as a bidirectional voltage type self-exciting inverter.
【００１９】これにより、電池１から電力系統側への電
力放電と、逆に電力系統側から電池１への電力充電との
双方向運転を行い、電力系統の負荷平準化等を実現す
る。As a result, the bidirectional operation of discharging the electric power from the battery 1 to the electric power system side and conversely charging the electric power from the electric power system side to the battery 1 is carried out to realize load leveling of the electric power system.
【００２０】（３）完全放電モード 電池１の放電が電圧形インバータ運転では対応できない
電圧まで低下したとき、放電動作を停止し、スイッチ１
２，１７，１８，１９をオフ状態にし、スイッチ１５，
１６をオン状態にし、電力変換器１１を電流形自励式コ
ンバータとして運転する。(3) Complete discharge mode When the discharge of the battery 1 drops to a voltage that cannot be handled by the voltage source inverter operation, the discharge operation is stopped and the switch 1
2, 17, 18, 19 are turned off, and the switch 15,
16 is turned on, and the power converter 11 is operated as a current type self-exciting converter.
【００２１】これにより、電池１の直流電力を直流リア
クトル２０とサイリスタブリッジを介して電力系統側に
電流放電し、この放電によって電池１を電圧零あるいは
負電圧まで完全放電する。As a result, the DC power of the battery 1 is discharged to the electric power system side via the DC reactor 20 and the thyristor bridge, and this discharge completely discharges the battery 1 to zero voltage or a negative voltage.
【００２２】従って、本実施例では１つの電力変換器と
直流リアクトル２０及び運転モード切り換えのためのス
イッチによって電池１の初期充電と電力融通と完全放電
の各モードによる電力変換を行うことができる。Therefore, in this embodiment, one power converter, the DC reactor 20, and the switch for switching the operation mode can perform the power conversion in each mode of the initial charging, the power interchange and the complete discharge of the battery 1.
【００２３】これにより、従来装置で必要とした３台の
電力変換器が１台で済み、またトランス及び制御回路も
１つになる。As a result, the three power converters required in the conventional apparatus are only one, and the transformer and the control circuit are also one.
【００２４】なお、本実施例において、ＧＴＯサイリス
タブリッジはトランジスタ、ＩＧＢＴやＭＯＳＦＥＴな
ど自己消弧形半導体スイッチであれば良く、また電力変
換容量によって半導体スイッチの並列接続又は半導体素
子のブリッジ回路の並列構成にされる。In this embodiment, the GTO thyristor bridge may be a self-extinguishing type semiconductor switch such as a transistor, an IGBT or a MOSFET, and the semiconductor switch may be connected in parallel or the semiconductor element bridge circuit may be connected in parallel depending on the power conversion capacity. To be
【００２５】また、スイッチ１２は電力変換器１１の運
転モードに応じてＧＴＯサイリスタブリッジとダイオー
ドブリッジを並列接続とその切り離しを行う機能素子で
あれば良く、その回路位置は両ブリッジの交流入出力側
に設けるなど適宜設計変更して同様の作用効果を得るこ
とができる。Further, the switch 12 may be any functional element for connecting and disconnecting the GTO thyristor bridge and the diode bridge in parallel according to the operation mode of the power converter 11, and the circuit position thereof is the AC input / output side of both bridges. It is possible to obtain the same operation and effect by appropriately changing the design such as providing the same.
【００２６】[0026]
【発明の効果】以上のとおり、本発明によれば、１台の
電力変換器と直流リアクトル及びスイッチ類により電池
の初期充電と完全放電及び電力系統側との電力融通を行
うようにしたため、電力変換器は主回路及び制御回路を
１台分用意することで済み、電力変換装置としてはその
構成を簡単化すると共にコストダウンを図ることがで
き、さらに設置スペースを小さくするコンパクト化を可
能とし、また部品点数の削減によって信頼性も向上する
効果がある。As described above, according to the present invention, one power converter, a DC reactor, and switches are used to perform initial charging and complete discharge of a battery and power interchange with the power system side. The converter only needs to prepare one main circuit and one control circuit. As a power converter, the structure can be simplified and the cost can be reduced, and further, the installation space can be reduced and the size can be reduced. In addition, reducing the number of parts has the effect of improving reliability.
【図１】本発明の一実施例を示す回路図。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】従来の回路図。FIG. 2 is a conventional circuit diagram.
１…完全放電形電力貯蔵用電池、１１…電力変換器、１
２，１４，１５，１６，１７，１８，１９…スイッチ、
１３…トランス、２０…直流リアクトル、２１…コンデ
ンサ。1 ... Battery for complete discharge type power storage, 11 ... Power converter, 1
2, 14, 15, 16, 17, 18, 19, ... Switch,
13 ... Transformer, 20 ... DC reactor, 21 ... Capacitor.
Claims (1)
系統との間で電力融通する電力貯蔵システムにおいて、 自己消弧形半導体スイッチのブリッジ回路とダイオード
ブリッジ回路を主回路として直流−交流電力変換と交流
−直流電力変換及び双方向電力変換の各運転モードで運
転される電力変換器と、 前記電力変換器の直流出力で電池を電流制御で初期充電
及び完全放電するときに該電力変換器と電池間に介装さ
れる直流リアクトルと、 前記電力変換器の運転モードに応じて該電力変換器と電
池との間の極性切り換えを行うスイッチと、 を備えたことを特徴とする電力変換装置。1. A power storage system in which electric power is exchanged with a power system by a battery for full-discharge power storage, in which DC-AC power conversion is performed by using a bridge circuit and a diode bridge circuit of a self-extinguishing semiconductor switch as main circuits. A power converter operated in each operation mode of AC-DC power conversion and bidirectional power conversion, and the power converter and the battery when the battery is initially charged and completely discharged by current control with the DC output of the power converter. A power converter comprising: a DC reactor interposed between the power converter and a switch for switching a polarity between the power converter and a battery according to an operation mode of the power converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4090421A JPH05292679A (en) | 1992-04-10 | 1992-04-10 | Power converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4090421A JPH05292679A (en) | 1992-04-10 | 1992-04-10 | Power converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05292679A true JPH05292679A (en) | 1993-11-05 |
Family
ID=13998141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4090421A Pending JPH05292679A (en) | 1992-04-10 | 1992-04-10 | Power converter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05292679A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007159234A (en) * | 2005-12-02 | 2007-06-21 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
| JP2010093868A (en) * | 2008-10-03 | 2010-04-22 | Yanmar Co Ltd | Bidirectional power converter |
| WO2010151170A1 (en) * | 2009-06-24 | 2010-12-29 | Kartelev Anatoly Yakovlevich | Device for producing an electrohydraulic effect on a well bottom-hole zone |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50132896A (en) * | 1974-04-05 | 1975-10-21 | ||
| JPS61112390U (en) * | 1984-12-26 | 1986-07-16 | ||
| JPS63256984A (en) * | 1987-04-15 | 1988-10-24 | サカエ理研工業株式会社 | Light transmission display body and molding thereof |
| JPH02207291A (en) * | 1989-02-07 | 1990-08-16 | Teijin Ltd | Display method |
-
1992
- 1992-04-10 JP JP4090421A patent/JPH05292679A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50132896A (en) * | 1974-04-05 | 1975-10-21 | ||
| JPS61112390U (en) * | 1984-12-26 | 1986-07-16 | ||
| JPS63256984A (en) * | 1987-04-15 | 1988-10-24 | サカエ理研工業株式会社 | Light transmission display body and molding thereof |
| JPH02207291A (en) * | 1989-02-07 | 1990-08-16 | Teijin Ltd | Display method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007159234A (en) * | 2005-12-02 | 2007-06-21 | Toshiba Mitsubishi-Electric Industrial System Corp | Uninterruptible power supply device |
| JP2010093868A (en) * | 2008-10-03 | 2010-04-22 | Yanmar Co Ltd | Bidirectional power converter |
| WO2010151170A1 (en) * | 2009-06-24 | 2010-12-29 | Kartelev Anatoly Yakovlevich | Device for producing an electrohydraulic effect on a well bottom-hole zone |
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