UPS시스템의 병렬운전 제어기법

The parallel operation system of multiple UPS(Uninterruptible Power Supply) is used to increase power capacity of the system or to secure higher reliability at critical loads In the parallel operation of the two UPSs, the load sharing control to maintain the current balance between them is a matter of consequence. In this paper, a highly precise load sharing controller is proposed and implemented for the parallel operation system of two UPSs. After that, a good performance of the proposed method IS verified by simulation in the parallel operation system with two UPSs