The storage battery and the feed circuit are insulated, and a small-sized power conversion device is realized. A power conversion device according to an embodiment is provided with: a chopper circuit (5) in which a step-down output terminal is electrically connected to a positive electrode terminal of a DC power source (2) via a reactor (8); an inverter (INV1) electrically connected between the positive terminal and the negative terminal of the DC power supply (1); an inverter (INV2) having a second DC main circuit electrically connected to the high-voltage circuit side of the chopper circuit (5); a transformer (15) electrically connected between the AC end of the inverter (INV1) and the AC end of the inverter (INV2); a capacitor (13) connected in parallel with the DC power supply (1); a capacitor (12) connected between the inverter (INV2) and the chopper circuit (5) and between the second DC main circuits; and a control circuit (CTR) that controls the output voltage phases of the inverter (INV1) and the inverter (INV2) so as to exchange power in both directions.

    蓄电池与馈电电路之间绝缘的同时,实现小型的功率转换装置。根据实施方式的功率转换装置,具备:斩波器电路(5),降压输出端子经由电抗器(8)电连接于直流电源(2)的正极端子;逆变器(INV1),第一直流主电路电连接于直流电源(1)的正极端子和负极端子之间;逆变器(INV2),第二直流主电路电连接于斩波器电路(5)的高压电路侧;变压器(15),电连接于逆变器(INV1)的交流端和逆变器(INV2)的交流端之间;电容器(13),相对于直流电源(1)并联连接;电容器(12),在逆变器(INV2)和斩波器电路(5)之间连接于第二直流主电路间;以及控制电路(CTR),以双方向地进行电力交换的方式控制逆变器(INV1)和逆变器(INV2)的输出电压相位。


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    Title :

    Power conversion device, power supply device for substation, and regenerative power storage device


    Additional title:

    功率转换装置、变电所用电源装置以及再生电力储存装置


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

    Publication date :

    2023-03-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    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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