Resonance Device Design of Bidirectional DC-DC Converter for Active Power Decoupling of Photovoltaic AC Module

태양광 AC 모듈의 능동 디커플링을 위한 양방향 DC-DC 컨버터의 공진 소자 설계

In the AC module system, mismatch problem between AC power and constant input power is occurred. To solve this problem, electrolytic capacitor is utilized for diminishing power pulsation in PV side. However, it has disadvantages of low life span and weak in temperature. Decoupling method has been studied to reduce the capacitance and replaces electrolytic capacitor to film capacitor. This paper proposes design method for decoupling circuit which bidirectional DC-DC converter using soft switching. Proposed system is verified by design optimization and simulation results.