基于新能源发电改进型移相全桥变换器研究  

Analysis of Improved Phase-shift Full-bridge Converter for New Energy Generation

作　　者：曾志辉[1,2] 刘云鹏 张琳梅[1,2] 杨明 ZENG Zhihui;LIU Yunpeng;ZHANG Linmei;YANG Ming(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003;Henan Key Laboratory of Intelligent Detection and Control of Coal Mine Equipment(Henan Polytechnic University),Jiaozuo 454003)

机构地区：[1]河南理工大学电气工程与自动化学院,焦作454003 [2]河南省煤矿装备智能检测与控制重点实验室(河南理工大学),焦作454003

出　　处：《电气工程学报》2024年第2期65-73,共9页Journal of Electrical Engineering

基　　金：国家自然科学基金(U1804143);河南省教育厅一般(222102220034);国家教育部产学研协同育人(201802046019,201901124006)资助项目。

摘　　要：新能源发电中需要广泛使用移相全桥变换器,以实现软开关技术从而减小系统的开关损耗。而传统移相全桥直流变换器滞后臂在轻载时难以实现ZVS,导致系统大功率输出时效率降低以及系统换路时容易产生尖峰电压、电流等现象,针对这一问题,提出了一种改进的有源软开关移相全桥DC-DC变换器拓扑。系统首先提出了改进变换器的拓扑结构,在此基础上对其工作模态进行了研究分析,并合理优化相关器件的选型,最后通过系统仿真及试验平台进行了系统仿真和试验测试,结果表明,所设计的加入辅助电路改进型移相全桥直流变换器在轻载情况下,能够使变换器滞后臂达到软开关效果,同时,在大功率输出情况下,对器件发热、电压波形振荡均有较好的抑制作用,系统整体效率变高,同时可靠性、稳定性变强。Phase-shifting full-bridge converters are widely used in new energy generation to realize soft switching technology and reduce switching loss.However,the traditional phase-shifted full-bridge DC-DC converter is difficult to realize ZVS under light load,which leads to low efficiency in high-power output and easy to produce peak voltage and current during circuit switching.To solve this problem,an improved active soft-switched phase-shifted full-bridge DC-DC converter topology is proposed.Firstly,the topology structure of the improved converter is proposed,and on this basis,the working mode of the converter is studied and analyzed,and the selection of related devices is reasonably optimized.Finally,the system simulation and experimental test are carried out through the system simulation and experimental platform.The results show that the improved phase-shifted full-bridge DC converter with auxiliary circuit is designed under light load.It can make the converter lag arm achieve the soft switching effect,and at the same time,in the case of high-power output,the device heating and voltage waveform oscillation have a better inhibition effect,the overall efficiency of the system becomes higher,and the reliability and stability become stronger.

关 键 词：有源软开关 辅助电路 移相全桥 拓扑结构 

分 类 号：TM561[电气工程—电器]