분산형 N+X 리던던트 UPS 시스템의 개발

This paper presents a non-electrical isolated prototype of N+X redundant UPS with two-quadrant converter. Proposed topology has multl-functions of battery charge and discharge regulation, operates with a near unity input power factor, compensates unbalanced voltage on DC bus capacitors, and regenerates the circulating active power among the inverters into battery or grid And furthermore, this system adopts a novel wireless parallel operation algorithm of N+X redundant UPS system with no control interconnections Simulation and experiment results are provided in this paper to prove the validity of proposed topology and wireless control algorithm