Power Conversion Apparatus

A power conversion apparatus connected to a three-phase alternating-current (AC) power supply, the power conversion apparatus comprising:

• a power converter including a first arm, a second arm, and a third arm;
• and
• a switchgear connected to the first to third arms, wherein
• each of the first to third arms includes a plurality of unit converters connected in series,
• each of the plurality of unit converters includes
• a plurality of switching elements, and
• a power storage element connected to the plurality of switching elements, and
• the switchgear includes
• a first switch provided on a first end side of each of the first to third arms,
• a second switch provided on a second end side of each of the first to third arms,
• a bus connecting the first switch provided on the first end side of one arm of the first to third arms to the second switch provided on the second end side of another arm of the first to third arms, and
• a power terminal provided on each bus for transmitting and receiving electric power between the power converter and the three-phase AC power supply.