ZVS Parallel Active Power Decoupling Circuit for Applying Flyback Inverter

플라이백 인버터에 병렬로 적용되는 ZVS 방식의 전력 디커플링 회로에 관한 연구

In general, a power decoupling method using electrolytic capacitor is used to solve a problem that appears 120[Hz] ripple of grid at the PV module output. But electrolytic capacitor has a effect on the short lifetime and low reliability of PV system. Therefore, studies which replace the large electrolytic capacitor with small film capacitor have been researched in resent years. This paper proposes flyback inverter which can be replaced with film capacitor by connecting the circuit implementing zero voltage switching in PV side. The proposed system is validated by PSIM simulation.