A Master and Slave Control Algorithm for Parallel Operation of Modular 3-Phase UPS System

모듈형 3상 무정전 전원장치의 병렬 운전을 위한 주종 제어 알고리즘

This paper introduces a master and slave control algorithm for parallel operation of UPS system. If each module of UPS system control the output voltage and filter inductor current in parallel operation, it occur unbalanced output power each module. To operate UPS system parallel, it need a algorithm that control output power of modules. A master and slave control algorithm is helpful to balance output power of modules by controlling output current. The effect of a master and slave control algorithm is proved by simulations.