POWER CONVERSION DEVICE

摘要

The present invention relates to a power conversion device which suppresses circulating currents and thereby improves efficiency and provides the convenience of increased capacity, in the context of parallel connection of power conversion devices. The circulating current that occurs in the parallel operation of power conversion devices can be broadly divided into low-frequency circulating current and high-frequency circulating current. Low-frequency circulating current occurs due to imbalance occurring between converters, while high-frequency circulating current occurs when the PWM method is used. The present invention aims to resolve the problem of the circulating current which occurs in the parallel operation of power conversion devices, and provides a power conversion device using a reverse-current-preventing unit or multi-inductor.