中国电机工程学报2023，Vol.43Issue(23)：9273-9284,12.DOI:10.13334/j.0258-8013.pcsee.221772
基于模式切换的双有源桥型微逆变器优化调制策略
Optimal Modulation Strategy of Dual-active-bridge Microinverter Based on Mode Switching
摘要
Abstract
Due to its low component count,wide soft-switching range,and high efficiency,the dual-active-bridge(DAB)microinverter has advantages over other topologies.In this paper,the transfer power range,RMS value of transformer current as well as the zero-voltage switching(ZVS)range of the three modulation modes are analyzed and compared detailly.Based on the analysis,the mode-switching modulation strategy is proposed.By designing the trajectory of the inner phase-shift angle in the power frequency cycle,and using feedforward control to calculate the value of the outer phase-shift angle,the modulation mode switches between mode 2 and mode 3,which can not only reduce the RMS value of transformer current,but also achieve soft-switching of all switches in the whole line cycle,which enhance the efficiency.A 600W microinverter prototype is constructed using the optimum transformer parameters,and the proposed modulation strategy is verified via simulation and experiments.关键词
微逆变器/模式切换/优化调制/零电压软开关/前馈控制Key words
microinverter/mode switching/optimum modulation/zero voltage switching/feed forward control分类
信息技术与安全科学引用本文复制引用
杨骐箐,李睿,徐君..基于模式切换的双有源桥型微逆变器优化调制策略[J].中国电机工程学报,2023,43(23):9273-9284,12.基金项目
国家自然科学基金项目(52177187).Project Supported by National Natural Science Foundation of China(52177187). （52177187）
