단상 임피던스-소스 동적 전압 보상기

This paper deals with a single-phase impedance-source dynamic voltage restorer (Impedance-DVR) to mitigate voltage sag/swell for the critical loads. The proposed system is composed of passive filter and impedance-source topology inverter. As an ESS(Energy Storage System) of the proposed system is employed the Proton Exchange Membrane Fuel Cells (PEMFC). To calculate and control the compensation voltage, single-phase i d -i q theory in dq rotating reference frame and PI controller are used. Simulation results under voltage sag and swell are presented to show the performance.