Power conversion apparatus

A power conversion apparatus comprising:

• a three-phase transformer interconnected to a three-phase power system;
• said three-phase transformer including:
• a primary winding group that receives three-phase electric power of said three-phase electric power system;
• a first secondary winding group and a second secondary winding group that receive electric power transferred from said primary winding group;
• and
• a first converter group and a second converter group connected to said first and second secondary winding groups, respectively,
• said primary winding group having first to third primary windings,
• said first secondary winding group having first to third secondary windings having respective one ends star-connected at a neutral point, said second secondary winding group having fourth to sixth secondary windings having respective one ends star-connected at a neutral point,
• the respective neutral points of said first and second secondary winding groups being connected to each other,
• said first converter group having first to third converter arms having respective one ends connected to other ends of said first to third secondary windings, and
• said second converter group having fourth to sixth converter arms having respective one ends connected to other ends of said fourth to sixth secondary windings,
• said power conversion apparatus further comprising a DC output terminal group connected to at least one of other ends of said first to third converter arms, and connected to at least one of other ends of said fourth to sixth converter arms.