基于LLC谐振变换器的双向DC-DC光伏储能回路设计  

Design of Bidirectional DC-DC Photovoltaic Energy Storage Circuit Based on LLC Resonant Converter

作　　者：薛家祥[1] 蔡典仑 金礼 XUE Jiaxiang;CAI Dianlun;JIN Li(School of Mechanical and Automobile Engineering,South China University of Technology,Guangzhou 510640,China;School of Physics and Mechatronics Engineering,Guizhou Minzu University,Guiyang 550000,China)

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640 [2]贵州民族大学物理与机电工程学院,贵阳550000

出　　处：《自动化与仪表》2024年第2期11-15,共5页Automation & Instrumentation

基　　金：国家自然科学基金资助项目(51875213);广东省自然科学基金项目(2214050007061);贵州省省级科技计划项目(ZK[2022]198);贵州省高等学校教学内容和课程体系改革项目(2021083)。

摘　　要：针对光储逆变器的储能回路效率较低,控制较为复杂等问题,该文设计了一款基于双向全桥LLC谐振变换器的双向储能电路。对双向全桥LLC谐振变换器的正向导通特性和反向导通特性进行介绍和分析,基于采用基波分析法得到的LLC谐振变换器等效电路,推导出变换器实现软开关的条件。通过推导得到的条件对LLC谐振变换器进行硬件参数设计,并成功搭建一台样机进行实验验证,实验结果表明,变换器可以在全负载领域实验软开关,并具有较高的效率,验证了理论分析的正确性。Aiming at the low efficiency and complex control of the energy storage inverter of photovoltaic storage inverter,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 converter are introduced and analyzed,and the conditions for soft switching of the converter are derived based on the equivalent 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.

关 键 词：LLC谐振变换器 逆变器 储能 DC-DC变换器 

分 类 号：TN86[电子电信—信息与通信工程]