THD CONTROL OF POWER CONVERSION DEVICE FOR DECREASING TOTAL HORMONIC DISTORTION

摘要

The present invention relates to frequency control of power conversion modules for reducing total harmonic distortion (THD) in a power conversion device in which the plurality of power conversion modules operate in parallel. According to one aspect of the present invention, the power conversion device comprises: a plurality of power conversion modules connected in parallel to receive input power and outputting output alternating current (AC) power; and a frequency controller controlling an operating frequency of each of the plurality of power conversion modules. The frequency controller includes a first step frequency adjustment function for adjusting the operating frequency of each of the plurality of power conversion modules so that the operating frequency of each of the plurality of power conversion modules has a predetermined relationship with each other.