摘要
这里研究了一种将CLLLC谐振变换器作为子模块的输入串联输出并联(ISOP)结构的双向隔离DC/DC电力电子变压器系统,以实现高压直流母线到低压直流母线的隔离变换。首先分析了单模块CLLLC谐振变换器的工作原理和增益特性,然后针对基于多CLLLC变换器模块的ISOP系统功率分配不均的问题,分析了谐振参数差异对ISOP系统功率分配的影响,并给出了系统正、反向运行功率均衡分配的控制策略。最后进行了实验研究,分别从软开关实现、动态响应以及功率平衡效果3方面对此处理论分析与控制策略有效性进行实验验证。
A bidirectional isolated DC/DC power electronics transformer system with input series output parallel(ISOP)structure using a CLLLC resonant converter as a sub-module is studied to realize the isolated transformation from high voltage direct current bus to low-voltage direct current bus.Firstly,the working principle and gain characteristics of single-module CLLLC resonant converter are analyzed.Then,the influence of the difference of resonant parameters on the power distribution of ISOP system based on multi-CLLLC converter modules is analyzed,and the control strategy of the balanced power distribution for forward and backward operation of the system is given.Finally,an experimental study is carried out,and the effectiveness of the theoretical analysis and control strategy is experimentally verified from three aspects:soft switching implementation,dynamic response and power balance effect.
作者
刘兴华
LIU Xing-hua(State Grid Shandong Electric Power Company Zibo Power Supply Company,Zibo 255022,China)
出处
《电力电子技术》
CSCD
北大核心
2022年第12期32-36,共5页
Power Electronics
关键词
电力电子变压器
谐振变换器
输入串联输出并联
power electronic transformer
resonant converter
input series output parallel
