JP2003180085A - Power conversion device - Google Patents
Power conversion deviceInfo
- Publication number
- JP2003180085A JP2003180085A JP2001375149A JP2001375149A JP2003180085A JP 2003180085 A JP2003180085 A JP 2003180085A JP 2001375149 A JP2001375149 A JP 2001375149A JP 2001375149 A JP2001375149 A JP 2001375149A JP 2003180085 A JP2003180085 A JP 2003180085A
- Authority
- JP
- Japan
- Prior art keywords
- power
- source
- control circuit
- generation source
- conversion device
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、自己消弧形半導体
素子を用いた電力変換装置に係り、燃料電池等の直流電
力発電源と交流系統のあいだに設けられる電力変換装置
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter using a self-arc-extinguishing type semiconductor device, and more particularly to a power converter provided between a DC power generating source such as a fuel cell and an AC system.
【０００２】[0002]
【従来の技術】燃料電池等の直流電力発電源と交流系統
のあいだに設けられる従来の電力変換装置は図５に示す
ような回路構成になっている。すなわち、電力変換装置
１は、ダイオード２と、コンデンサ３ａ，３ｂと、直流
電圧変換器４と、直交変換器５と、フィルタ６と、系統
遮断器７と、制御回路８とを備え、燃料電池に代表され
る直流電力発電源９と交流系統10の間に接続される。2. Description of the Related Art A conventional power conversion device provided between a DC power source such as a fuel cell and an AC system has a circuit configuration as shown in FIG. That is, the power converter 1 includes a diode 2, capacitors 3a and 3b, a DC voltage converter 4, a quadrature converter 5, a filter 6, a system breaker 7, and a control circuit 8, and a fuel cell Is connected between the DC power source 9 and the AC system 10.
【０００３】ダイオード２は直流電力発電源９に対し
て、逆充電を防止する役割を担う。コンデンサ３ａ，３
ｂは直流電圧を安定させる役割を担う。直流電圧変換器
４は自己消弧形素子、例えばＩＧＢＴ(Insulated Gate
Bipolar Transistor)と、リアクトルと、ダイオードに
より構成され、ＩＧＢＴをオン／オフ制御することで、
直流電力発電源９の電圧を直交変換器５に適した電圧に
昇圧させる役割を担う。The diode 2 plays a role of preventing reverse charging of the DC power source 9. Capacitors 3a, 3
b plays a role of stabilizing the DC voltage. The DC voltage converter 4 is a self-extinguishing element, for example, an IGBT (Insulated Gate).
Bipolar Transistor), a reactor, and a diode. By controlling the IGBT on / off,
It plays a role of boosting the voltage of the DC power source 9 to a voltage suitable for the orthogonal converter 5.
【０００４】直交変換器５は自己消弧形素子、例えばＩ
ＧＢＴにより構成され、ＩＧＢＴをオン／オフ制御する
ことで、直流電力を交流電力に変換する。フィルタ６は
直交変換器５の交流出力に含まれるリプルを低減するた
めに用いられている。一般にリアクトルと、コンデンサ
からなる２次のローパスフィルタで構成される。系統遮
断器７は電力変換装置１と交流系統10を切り離す役割を
担う。The orthogonal transformer 5 is a self-extinguishing element, such as I
It is composed of a GBT, and DC power is converted to AC power by controlling the ON / OFF of the IGBT. The filter 6 is used to reduce the ripple contained in the AC output of the orthogonal transformer 5. Generally, it is composed of a reactor and a second-order low-pass filter including a capacitor. The system breaker 7 plays a role of disconnecting the power conversion device 1 and the AC system 10.
【０００５】制御回路８は、直流電圧変換器４と直交変
換器５の自己消弧形素子のオン／オフを制御する。直流
電圧変換器４は直交変換器５の入力直流電圧が一定とな
るように、また、直交変換器５は交流系統10の位相に同
期した交流電流を出力するように制御される。このと
き、直流電力発電源９の発電した電力が、電力変換装置
１内で消費される電力と交流系統10へ出力される電力の
和に一致するように制御される。制御回路８の電源は直
流電力発電源９から得る。The control circuit 8 controls on / off of the self-turn-off elements of the DC voltage converter 4 and the quadrature converter 5. The DC voltage converter 4 is controlled so that the input DC voltage of the quadrature converter 5 is constant, and the quadrature converter 5 outputs an AC current synchronized with the phase of the AC system 10. At this time, the power generated by the DC power generator 9 is controlled to match the sum of the power consumed in the power conversion device 1 and the power output to the AC system 10. The power source of the control circuit 8 is obtained from the DC power source 9.
【０００６】[0006]
【発明が解決しようとする課題】燃料電池は化学反応を
起こす電解質セルに、燃料である水素と酸素が十分行き
渡っていない停止時や起動時に給電を行うと、電解質や
電極が破損する。したがって、図５に示した従来の電力
変換装置では、直流電力発電源９が停止または起動中で
ある場合は、直流電力発電源９の電解質セルおよび電極
を破損させるため、電解質セル内に十分な水素と酸素が
供給されるまで、制御回路８に給電することができな
い。制御回路８に電源が供給されない場合、自己消弧形
素子のゲート電位を固定することができないため、ノイ
ズなどによる誤動作により、直交変換器５の上下アーム
が短絡し、短絡電流により素子を破壊することがある。In a fuel cell, when electricity is supplied to an electrolyte cell which causes a chemical reaction at the time of stop or start when hydrogen and oxygen as fuels are not sufficiently distributed, the electrolyte and electrodes are damaged. Therefore, in the conventional power converter shown in FIG. 5, when the DC power generating power source 9 is stopped or starting, the electrolyte cell and the electrode of the DC power generating power source 9 are damaged, so that the inside of the electrolyte cell is sufficient. The control circuit 8 cannot be powered until hydrogen and oxygen are supplied. When the control circuit 8 is not supplied with power, the gate potential of the self-extinguishing element cannot be fixed, and the upper and lower arms of the orthogonal transformer 5 are short-circuited by a malfunction due to noise or the like, and the element is destroyed by the short-circuit current. Sometimes.
【０００７】よって、本発明は直流電力発電源が停止ま
たは起動中である場合でも、直流電力発電源を保護し、
かつ安全に起動して交流電力を得ることのできる電力変
換装置を提供することを目的とする。Therefore, the present invention protects the DC power generation source even when the DC power generation source is stopped or starting,
Moreover, it is an object of the present invention to provide a power conversion device that can safely start up and obtain AC power.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に請求項１に係る電力変換装置は、直流電力発電源と交
流系統のあいだに接続される電力変換装置において、自
己消弧形半導体素子を備え前記直流電力発電源の電力を
交流に変換する直交変換器と、前記直交変換器を制御す
る制御回路と、前記交流系統から受電する交流側受電手
段と、前記直流電力発電源から受電する直流側受電手段
と、前記交流側受電手段の出力電圧と前記直流側受電手
段の出力電圧のいずれか高い方を優先して前記制御回路
の電源として供給する高値優先給電手段とを備えた構成
とする。To achieve the above object, a power converter according to a first aspect of the present invention is a self-extinguishing semiconductor element in a power converter connected between a direct current power source and an alternating current system. A quadrature converter for converting the power of the DC power generation source to AC, a control circuit for controlling the quadrature converter, AC side power receiving means for receiving power from the AC system, and power reception from the DC power generation source. A configuration including a direct current side power receiving means, and a high value priority power feeding means for preferentially supplying the higher one of the output voltage of the alternating current side power receiving means and the output voltage of the direct current side power receiving means as a power source of the control circuit; To do.
【０００９】請求項１の発明によれば、直流電力発電源
が停止中、または起動中の場合、直流電力発電源を給電
による破損を防ぐとともに、制御回路の電源は交流系統
より得ることができる。そして、直流電力発電源が電力
を安定供給できる状態になったときは制御回路の電源を
直流電力発電源より供給することができる。According to the first aspect of the present invention, when the DC power generation source is stopped or starting, damage to the DC power generation source due to power supply can be prevented, and the power source of the control circuit can be obtained from the AC system. . Then, when the DC power generation source is in a state where it can stably supply power, the power of the control circuit can be supplied from the DC power generation source.
【００１０】請求項２の発明は、請求項１の発明におい
て、高値優先給電手段と並列に補助直流源を設けた構成
とする。請求項２の発明によれば、請求項１の発明の効
果に加え、直流電力発電源が停止中または起動中で、か
つ交流電源がない場合でも、制御回路の電源を供給する
ことができる。According to a second aspect of the present invention, in the first aspect of the invention, an auxiliary DC source is provided in parallel with the high-value priority power feeding means. According to the invention of claim 2, in addition to the effect of the invention of claim 1, the power of the control circuit can be supplied even when the DC power generation source is stopped or started and there is no AC power source.
【００１１】請求項３の発明は、請求項２の発明におい
て、直流電力発電源からの入力をオンオフするスイッチ
を設けた構成とする。請求項３の発明によれば、直流電
力発電源が停止中または起動中で、かつ交流電源がない
場合でも、制御回路に制御回路の電源を供給することが
できる。According to a third aspect of the present invention, in the second aspect of the invention, a switch is provided to turn on / off the input from the DC power source. According to the invention of claim 3, the power of the control circuit can be supplied to the control circuit even when the DC power generation source is stopped or started and there is no AC power source.
【００１２】請求項４の発明は、請求項１の発明におい
て、直流電力発電源からの入力と並列に補助直流源をオ
ンオフ可能に設けた構成とする。請求項４の発明によれ
ば、直流電力発電源が停止中または起動中で、かつ交流
電源がない場合でも、制御回路に制御回路の電源を供給
することができる。さらに、補助直流源から直流電力を
供給することで、直流電力発電源が動作していないとき
でも、独立電源としてより安定した電源供給が可能とな
る。According to a fourth aspect of the present invention, in the first aspect of the present invention, an auxiliary DC source is provided so as to be turned on / off in parallel with the input from the DC power source. According to the invention of claim 4, the power of the control circuit can be supplied to the control circuit even when the DC power generation source is stopped or started and there is no AC power source. Furthermore, by supplying DC power from the auxiliary DC source, it is possible to supply more stable power as an independent power supply even when the DC power generation source is not operating.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態につい
て図面を参照して詳細に説明する。図１は本発明の第１
の実施の形態の電力変換装置の構成を示す回路図であ
る。図５と同一の要素については同一の符号を付してそ
の説明を省略し、ここでは異なる部分についてのみ述べ
る。すなわち、電力変換装置１ａは、直流電力発電源９
から給電する制御回路８の電源に継電器12とダイオード
13ａを設け、交流系統10より給電する制御回路８の電源
に変圧器15と整流ブリッジ14とダイオード13ｂを設け、
ダイオード13ａと13ｂのカソード側を突き合わせて、電
圧の高い方から電力が給電される高値優先電源とした構
成である。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the first of the present invention.
It is a circuit diagram which shows the structure of the power converter device of embodiment. Elements that are the same as in FIG. 5 are assigned the same reference numerals and explanations thereof are omitted, and only different portions will be described here. That is, the power conversion device 1a includes the DC power generation source 9
The relay 12 and the diode are used for the power supply of the control circuit 8 which is fed from the
13a is provided, and a transformer 15, a rectifying bridge 14, and a diode 13b are provided in the power source of the control circuit 8 which supplies power from the AC system 10.
This is a configuration in which the cathode sides of the diodes 13a and 13b are butted against each other, and a high value priority power source is supplied with power from the higher voltage side.
【００１４】直流電力発電源９が停止中または起動中
は、継電器12をオフする。この場合、交流系統10から変
圧器15、整流ブリッジ14により、直流に変換された電力
が制御回路８の電源として供給される。この交流系統10
から作られる直流電圧は、直流電力発電源９が安定して
給電できる状態になったときの直流電圧より低くなるよ
うに、変圧器15を設定する。直流電力発電源９が安定し
て給電できる状態になったとき継電器12をオンすると、
制御回路８の電源は電圧の高い方が優先されるため、制
御回路８の電源は自動的に直流電力発電源９より給電さ
れるようになる。The relay 12 is turned off while the DC power source 9 is stopped or activated. In this case, the AC system 10 supplies the electric power converted to DC by the transformer 15 and the rectifying bridge 14 as the power source of the control circuit 8. This AC system 10
The transformer 15 is set so that the DC voltage generated from the DC voltage is lower than the DC voltage when the DC power generation source 9 is in a state where it can stably supply power. When the relay 12 is turned on when the DC power source 9 is in a state where stable power can be supplied,
Since the power source of the control circuit 8 is prioritized in the order of higher voltage, the power source of the control circuit 8 is automatically fed from the DC power source 9.
【００１５】この第１の実施の形態の電力変換装置によ
れば、直流電力発電源９が停止中、または起動中の場
合、直流電力発電源９からの給電をオフすることによ
り、制御回路８の電源は交流系統10より得ることができ
る。直流電力発電源９が電力を安定供給できる状態にな
ったときは直流電力発電源９からの給電をオンすること
で、制御回路８の電源は直流側より供給することができ
る。According to the power converter of the first embodiment, the control circuit 8 is turned off by turning off the power supply from the DC power generation source 9 when the DC power generation source 9 is stopped or activated. The power source can be obtained from the AC system 10. When the DC power generation source 9 is in a state where it can stably supply power, the power supply of the control circuit 8 can be supplied from the DC side by turning on the power supply from the DC power generation source 9.
【００１６】つぎに、図２は本発明の第２の実施の形態
の電力変換装置１ｂの構成を示す回路である。図１、図
５と同一の要素については同一の符号を付してその説明
を省略し、ここでは異なる部分についてのみ述べる。す
なわち、ダイオード13ａ，13ｂのカソード側を突き合わ
せた制御回路８の入力端に、蓄電池21を接続した構成で
ある。Next, FIG. 2 is a circuit showing a configuration of a power converter 1b according to a second embodiment of the present invention. The same elements as those in FIGS. 1 and 5 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different portions will be described. That is, the storage battery 21 is connected to the input end of the control circuit 8 in which the cathode sides of the diodes 13a and 13b are butted against each other.
【００１７】継電器12の動作は、前記第１の実施の形態
と同じである。直流電力発電源９が停止中または起動
中、かつ交流系統10がない場合、蓄電池21より制御回路
８の電源が供給される。これにより、同期する交流電源
がなくても、直流電力発電源９は独立電源として動作で
きる。The operation of the relay 12 is the same as that of the first embodiment. When the DC power generation source 9 is stopped or activated and the AC system 10 is not present, the storage battery 21 supplies the power to the control circuit 8. Accordingly, the DC power generation source 9 can operate as an independent power source even if there is no synchronized AC power source.
【００１８】この第２の実施の形態の電力変換装置によ
れば、直流電力発電源９が停止中または起動中の場合
で、さらに交流系統10がない場合でも、制御回路８を動
作させる電力はダイオード13ａ，13ｂの出力と並列に接
続された蓄電池21から得ることができる。そして、直流
電力発電源９が電力を安定供給できる状態になったとき
は、直流電力発電源９からの給電をオンすることで、制
御回路８の電源は直流電力発電源９より供給することが
できる。According to the power converter of the second embodiment, the electric power for operating the control circuit 8 is generated even when the DC power generating source 9 is stopped or starting and there is no AC system 10. It can be obtained from the storage battery 21 connected in parallel with the outputs of the diodes 13a and 13b. Then, when the DC power generation source 9 is in a state in which it can stably supply power, the power supply from the DC power generation source 9 is turned on so that the power supply of the control circuit 8 can be supplied from the DC power generation source 9. it can.
【００１９】つぎに、図３は本発明の第３の実施の形態
の電力変換装置１ｃの構成を示す回路図である。図１、
図２、図５と同一の要素については同一の符号を付して
その説明を省略し、ここでは異なる部分についてのみ述
べる。すなわち、主回路を短絡／開放する継電器22と、
充電電流を抑制する充電抵抗23と、この充電抵抗23を短
絡する継電器24とを設け、直流電力発電源９から給電す
る制御回路８の電源にダイオード13ａを設ける。また、
交流系統10より給電する制御回路８の電源に変圧器15、
整流ブリッジ14、ダイオード13ｂを設ける。そして、ダ
イオード13ａ，13ｂのカソード側を突き合わせて、制御
回路８への入力端に、蓄電池21を接続し、電圧の高い方
から制御回路８へ電力が給電される高値優先電源とした
構成である。Next, FIG. 3 is a circuit diagram showing a configuration of a power conversion device 1c according to a third embodiment of the present invention. Figure 1,
The same elements as those in FIGS. 2 and 5 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different portions will be described. That is, a relay 22 that short-circuits / opens the main circuit,
A charging resistor 23 that suppresses the charging current and a relay 24 that short-circuits the charging resistor 23 are provided, and a diode 13a is provided at the power source of the control circuit 8 that is fed from the DC power source 9. Also,
The transformer 15 is used for the power supply of the control circuit 8 which supplies power from the AC system 10.
A rectifying bridge 14 and a diode 13b are provided. Then, the cathode sides of the diodes 13a and 13b are butted against each other, the storage battery 21 is connected to the input terminal to the control circuit 8, and the high value priority power source is supplied with power from the higher voltage side to the control circuit 8. .
【００２０】直流電力発電源９が停止中または起動中
は、継電器22，24をオフする。この場合、交流系統10か
ら変圧器15、整流ブリッジ14により、直流に変換された
電力が制御回路８の電源として供給される。この交流系
統10から作られる直流電圧は、直流電力発電源９が安定
して給電できる状態になったときの直流電圧より低くな
るように、変圧器15を設定する。The relays 22 and 24 are turned off while the DC power source 9 is stopped or activated. In this case, the AC system 10 supplies the electric power converted to DC by the transformer 15 and the rectifying bridge 14 as the power source of the control circuit 8. The transformer 15 is set so that the DC voltage generated from the AC system 10 is lower than the DC voltage when the DC power generation source 9 is in a state where it can stably supply power.
【００２１】直流電力発電源９が安定して給電できる状
態になったとき継電器22をオンすると、充電抵抗23で抑
制された電流が主回路に流れ、直流電圧変換器４の直流
電圧は上昇し、交流系統10から作られる直流電圧より高
くなったとき、自動的に直流電力発電源９から給電され
る。充電抵抗23はコンデンサ３ａへの充電電流を抑制
し、コンデンサ充電時の直流電力発電源９の電圧降下を
抑える。そのため、ダイオード２の順電流定格値を下げ
ることができる。When the relay 22 is turned on when the DC power generator 9 is in a state where stable power supply is possible, the current suppressed by the charging resistor 23 flows into the main circuit, and the DC voltage of the DC voltage converter 4 rises. When the voltage becomes higher than the DC voltage generated from the AC system 10, the DC power source 9 automatically supplies power. The charging resistor 23 suppresses the charging current to the capacitor 3a and suppresses the voltage drop of the DC power generation source 9 when the capacitor is charged. Therefore, the forward current rated value of the diode 2 can be lowered.
【００２２】充電電流が安定したところで継電器24をオ
ンすると、直流電力発電源９の運転中は充電抵抗23によ
る損失はゼロになる。直流電力発電源９が停止中または
起動中、かつ交流系統10がない場合は蓄電池21より制御
回路８の電源が供給される。これにより、同期する交流
電源がなくても、直流電力発電源９は独立電源として動
作することができる。When the relay 24 is turned on when the charging current is stable, the loss due to the charging resistor 23 becomes zero during the operation of the DC power generator 9. When the DC power generation source 9 is stopped or activated and the AC system 10 is not present, the storage battery 21 supplies power to the control circuit 8. As a result, the DC power generation source 9 can operate as an independent power source even if there is no synchronized AC power source.
【００２３】この第３の実施の形態の電力変換装置によ
れば、直流電力発電源９が停止中または起動中の場合、
主回路の短絡／開放を行う継電器22をオフすることによ
り、制御回路８の電源は交流側より得ることができる。
さらに交流電源がない場合でも、制御回路８を動作させ
る電力は直流電力発電源９の出力と並列に接続された蓄
電池21から得ることができる。直流電力発電源９が電力
を安定供給できる状態になったときは、主回路の短絡／
開放を行う継電器22をオンし、充電電流が安定したとこ
ろで、継電器24をオンして充電抵抗23を短絡すること
で、制御回路８の電源を直流電力発電源９より供給する
ことができる。According to the power converter of the third embodiment, when the DC power generating source 9 is stopped or starting,
By turning off the relay 22 that shorts / opens the main circuit, the power source of the control circuit 8 can be obtained from the AC side.
Further, even when there is no AC power source, the power for operating the control circuit 8 can be obtained from the storage battery 21 connected in parallel with the output of the DC power source 9. When the DC power generator 9 is in a state where it can stably supply power, the main circuit is short-circuited /
When the relay 22 for opening is turned on and the charging current is stable, the relay 24 is turned on and the charging resistor 23 is short-circuited, so that the power source of the control circuit 8 can be supplied from the DC power source 9.
【００２４】つぎに、図４は本発明の第４の実施の形態
の電力変換装置１ｄの構成を示す回路図である。図１、
図２、図３、図５と同一の要素については同一の符号を
付してその説明を省略し、ここでは異なる部分について
のみ述べる。すなわち、直流電力発電源９からの入力と
並列に、蓄電池25と直流電圧変換器26を接続し、主回路
を短絡／開放する継電器22を設け、直流電力発電源９か
ら給電する制御回路８の電源にダイオード13ａを設け、
交流系統10より給電する制御回路８の電源に変圧器15、
整流ブリッジ14、ダイオード13ｂを設ける。そして、ダ
イオード13ａ，13ｂのカソード側を突き合わせて、電圧
の高い方から電力が給電される高値優先電源とした構成
である。Next, FIG. 4 is a circuit diagram showing a configuration of a power conversion device 1d according to a fourth embodiment of the present invention. Figure 1,
The same elements as those in FIGS. 2, 3 and 5 are designated by the same reference numerals, and the description thereof will be omitted. Here, only different portions will be described. That is, in parallel with the input from the DC power generation source 9, the storage battery 25 and the DC voltage converter 26 are connected, the relay 22 for short-circuiting / opening the main circuit is provided, and the control circuit 8 for supplying power from the DC power generation source 9 is provided. The diode 13a is provided in the power source,
The transformer 15 is used for the power supply of the control circuit 8 which supplies power from the AC system 10.
A rectifying bridge 14 and a diode 13b are provided. Then, the cathode sides of the diodes 13a and 13b are abutted against each other to form a high value priority power source in which power is supplied from the higher voltage side.
【００２５】直流電力発電源９が停止中または起動中
で、交流系統10からの電源がある場合は、継電器22の動
作は、前記第３の実施の形態と同じである。直流電力発
電源９が停止中または起動中かつ交流系統10からの電源
がない場合は、直流電圧変換器26を制御して、蓄電池25
から制御回路８の電源を供給する。これにより、同期す
る交流電源がなくても、直流電力発電源９は独立電源と
して動作することができる。When the DC power source 9 is stopped or started and there is a power source from the AC system 10, the operation of the relay 22 is the same as that of the third embodiment. When the DC power generation source 9 is stopped or activated and there is no power from the AC system 10, the DC voltage converter 26 is controlled and the storage battery 25
Supplies power to the control circuit 8. As a result, the DC power generation source 9 can operate as an independent power source even if there is no synchronized AC power source.
【００２６】この第４の実施の形態の電力変換装置によ
れば、直流電力発電源９が停止中または起動中の場合
で、さらに交流系統10からの電源がない場合は、制御回
路８を動作させる電力は、直流電力発電源９からの入力
と並列に接続された蓄電池25から得ることができる。直
流電力発電源９が電力を安定供給できる状態になったと
きは、直流電力発電源９からの給電をオンすることで、
制御回路８の電源を直流電力発電源９より供給すること
ができる。According to the power converter of the fourth embodiment, the control circuit 8 is operated when the DC power generating source 9 is stopped or starting and there is no power from the AC system 10. The electric power to be generated can be obtained from the storage battery 25 connected in parallel with the input from the DC power generation source 9. When the DC power generation source 9 is in a state where it can stably supply power, by turning on the power supply from the DC power generation source 9,
The power supply of the control circuit 8 can be supplied from the DC power generation power supply 9.
【００２７】なお、上記４つの実施の形態は、直流電力
発電源９と電力変換装置１ａ〜１ｄ一組ずつの構成例に
ついて述べたが、本発明は、これらの組み合わせに限定
することはなく、直流電力発電源９の直並列、電力変換
装置の多直列接続、多並列接続の場合でも、同様な効果
を得ることができる。また、交流系統10の相数によらず
適用が可能である。Although the above four embodiments have been described with respect to the configuration examples of the DC power generation source 9 and the power conversion devices 1a to 1d, the present invention is not limited to these combinations. Similar effects can be obtained even in the case where the DC power generating source 9 is connected in series or parallel, and the power converters are connected in multiple series or in multiple parallel. Further, the present invention can be applied regardless of the number of phases of the AC system 10.
【００２８】[0028]
【発明の効果】本発明によれば、直流電力発電源が停止
または起動中である場合でも、直流電源発電源を保護
し、かつ安全に起動して交流電力を得ることのできる電
力変換装置を提供することができる。According to the present invention, there is provided a power conversion device capable of protecting a DC power supply source even when the DC power supply source is stopped or being activated, and safely starting the AC power source to obtain AC power. Can be provided.
【図１】本発明の第１の実施の形態の電力変換装置を示
す回路図。FIG. 1 is a circuit diagram showing a power conversion device according to a first embodiment of the present invention.
【図２】本発明の第２の実施の形態の電力変換装置を示
す回路図。FIG. 2 is a circuit diagram showing a power conversion device according to a second embodiment of the present invention.
【図３】本発明の第３の実施の形態の電力変換装置を示
す回路図。FIG. 3 is a circuit diagram showing a power conversion device according to a third embodiment of the present invention.
【図４】本発明の第４の実施の形態の電力変換装置を示
す回路図。FIG. 4 is a circuit diagram showing a power conversion device according to a fourth embodiment of the present invention.
【図５】従来の電力変換装置を示す回路図。FIG. 5 is a circuit diagram showing a conventional power conversion device.
１，１ａ，１ｂ，１ｃ，１ｄ…電力変換装置、２…ダイ
オード、３ａ，３ｂ…コンデンサ、４…直流電圧変換
器、５…直交変換器、６…フィルタ、７…系統遮断器、
８…制御回路、９…直流電力発電源、10…交流系統、12
…継電器、13ａ，13ｂ…整流器、14…整流ブリッジ、15
…変圧器、21…蓄電池、22…継電器、23…充電抵抗、24
…継電器、25…蓄電池、26…直流電圧変換器。1, 1a, 1b, 1c, 1d ... Power converter, 2 ... Diode, 3a, 3b ... Capacitor, 4 ... DC voltage converter, 5 ... Quadrature converter, 6 ... Filter, 7 ... System breaker,
8 ... Control circuit, 9 ... DC power source, 10 ... AC system, 12
… Relays, 13a, 13b… Rectifiers, 14… Rectifier bridges, 15
… Transformer, 21… Storage battery, 22… Relay, 23… Charging resistance, 24
… Relay, 25… Battery, 26… DC voltage converter.
Claims (4)
続される電力変換装置において、自己消弧形半導体素子
を備え前記直流電力発電源の電力を交流に変換する直交
変換器と、前記直交変換器を制御する制御回路と、前記
交流系統から受電する交流側受電手段と、前記直流電力
発電源から受電する直流側受電手段と、前記交流側受電
手段の出力電圧と前記直流側受電手段の出力電圧のいず
れか高い方を優先して前記制御回路の電源として供給す
る高値優先給電手段とを備えたことを特徴とする電力変
換装置。1. A power converter connected between a direct current power source and an alternating current system, comprising a quadrature converter including a self-extinguishing semiconductor element and converting the power of the direct current source into alternating current. A control circuit for controlling the converter, an AC side power receiving means for receiving power from the AC system, a DC side power receiving means for receiving power from the DC power generation source, an output voltage of the AC side power receiving means and the DC side power receiving means. A power conversion device, comprising: a high-value priority power supply unit that preferentially supplies the higher one of the output voltages as a power source of the control circuit.
設けたことを特徴とする請求項１記載の電力変換装置。2. The power conversion device according to claim 1, wherein an auxiliary DC source is provided in parallel with the high-value priority power supply means.
るスイッチを設けたことを特徴とする請求項２記載の電
力変換装置。3. The power conversion device according to claim 2, further comprising a switch for turning on / off an input from the DC power generation source.
直流源をオンオフ可能に設けたことを特徴とする請求項
１記載の電力変換装置。4. The power conversion device according to claim 1, wherein an auxiliary DC source is provided in parallel with an input from the DC power generation source so that the auxiliary DC source can be turned on and off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001375149A JP2003180085A (en) | 2001-12-10 | 2001-12-10 | Power conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001375149A JP2003180085A (en) | 2001-12-10 | 2001-12-10 | Power conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003180085A true JP2003180085A (en) | 2003-06-27 |
Family
ID=19183571
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001375149A Pending JP2003180085A (en) | 2001-12-10 | 2001-12-10 | Power conversion device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003180085A (en) |
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| WO2013178546A1 (en) * | 2012-06-01 | 2013-12-05 | Fronius International Gmbh | Voltage supply for an inverter |
| WO2014083788A1 (en) * | 2012-11-30 | 2014-06-05 | パナソニック株式会社 | Bidirectional converter |
| JP2021040458A (en) * | 2019-09-05 | 2021-03-11 | オムロン株式会社 | Power conversion device and system interconnection system |
| US11183917B1 (en) * | 2020-06-23 | 2021-11-23 | Contemporary Amperex Technology Co., Limited | Power converter, power conversion system, and power conversion method |
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| JP2021040458A (en) * | 2019-09-05 | 2021-03-11 | オムロン株式会社 | Power conversion device and system interconnection system |
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| JP7272190B2 (en) | 2019-09-05 | 2023-05-12 | オムロン株式会社 | Power conversion equipment, grid connection system |
| US11183917B1 (en) * | 2020-06-23 | 2021-11-23 | Contemporary Amperex Technology Co., Limited | Power converter, power conversion system, and power conversion method |
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