To realize a compact power conversion device while insulating a storage battery and an electric circuit.SOLUTION: A power conversion device according to an embodiment includes: a chopper circuit 5 in which a step-down output terminal is electrically connected to a positive electrode terminal of a DC power supply 2 via a reactor 8; an inverter INV1 in which a first DC main circuit is electrically connected between the positive and negative electrode terminals of the DC power supply 1; an inverter INV2 in which a second DC main circuit is electrically connected to a high voltage circuit side of the chopper circuit 5; a transformer 15 electrically connected between an AC end of the inverter INV1 and an AC end of the inverter INV2; a capacitor 13 connected in parallel to the DC power supply 1; a capacitor 12 connected between the second DC main circuits between the inverter INV2 and the chopper circuit 5; and a control circuit CTR for controlling an output voltage phase of the inverter INV1 and inverter INV2 such that power can be interchanged in both directions.SELECTED DRAWING: Figure 1

    【課題】 蓄電池とき電回路との間を絶縁しつつ、小型な電力変換装置を実現する。【解決手段】 実施形態による電力変換装置は、直流電源2の正極端子に、リアクトル8を介して、降圧出力端子が電気的に接続されたチョッパ回路5と、直流電源1の正極端子と負極端子との間に第1直流主回路が電気的に接続されたインバータINV1と、チョッパ回路5の高圧回路側に第2直流主回路が電気的に接続されたインバータINV2と、インバータINV1の交流端とインバータINV2の交流端との間に電気的に接続された変圧器15と、直流電源1に対して並列に接続されたコンデンサ13と、インバータINV2とチョッパ回路5との間において第2直流主回路間に接続されたコンデンサ12と、双方向に電力融通するようにインバータINV1とインバータINV2との出力電圧位相を制御する制御回路CTRと、を備える。【選択図】図1


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    Title :

    POWER CONVERSION DEVICE, SUBSTATION POWER SUPPLY DEVICE, AND REGENERATIVE POWER STORAGE DEVICE


    Additional title:

    電力変換装置、変電所用電源装置および回生電力貯蔵装置


    Contributors:
    NOGI MASAYUKI (author) / MAKI KOJI (author)

    Publication date :

    2021-12-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H02M APPARATUS 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 , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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