Design of Bidirectional DC-DC Photovoltaic Energy Storage Circuit Based on LLC Resonant Converter
Aiming at the low efficiency and complex control of the energy storage inverter of photovoltaic storage in-verter,a bidirectional energy storage circuit based on bidirectional full-bridge LLC resonant converter is designed.The forward conduction characteristics and reverse conduction characteristics of bidirectional full-bridge LLC resonant con-verter are introduced and analyzed,and the conditions for soft switching of the converter are derived based on the e-quivalent circuit of LLC resonant converter obtained by fundamental analysis.The hardware parameters of the LLC resonant converter are designed under the derivated conditions,and a prototype is successfully built for experimental verification,and the experimental results show that the converter can experiment with soft switching in the full-load field and has high efficiency,which verifies the correctness of the theoretical analysis.
万方数据
维普
