무정전 전원 공급 장치의 전류제한을 통한 용량 절감에 관한 연구

This paper presents capacity reduction of UPS system by limiting the reference current of the inverter that has high crest factor load. Reference current is limited within satisfying the constraint of UPS output voltage. UPS controller consists of voltage controller and current controller. Limiter is inserted between these controllers. Also, it presents limit area in the stationary reference frame and limit methods