电力电子变压器隔离级并联双有源变换器的控制与建模研究  

Research on control and modeling method of parallel dual active bridge converter in power electronic transformer

作　　者：马春艳[1] 段青[1] 刘君 刘海军 李玉凌[1] 施永[4] MA Chunyan;DUAN Qing;LIU Jun;LIU Haijun;LI Yuling;SHI Yong(Beijing Key Laboratory of Distribution Transformer Energy-saving Technology,China Electric Power Research Institute,Beijing 100192,China;Anshan Electric Power Supply Company,State Grid Liaoning Electric Power Supply Co.,Ltd.,Anshan 114001,China;Institute of Power Electronics,Global Energy Interconnection Research Institute,Beijing 102209,China;School of Electric Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]中国电力科学研究院配电变压器节能技术北京市重点实验室,北京100192 [2]国网辽宁省电力有限公司鞍山供电公司,辽宁鞍山114001 [3]全球能源互联网研究院电力电子研究院,北京102209 [4]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2018年第2期194-199,239,共7页Journal of Hefei University of Technology：Natural Science

基　　金：国家电网公司科技资助项目(PD71-15-046)

摘　　要：电力电子变压器中隔离级采用多双有源桥变换器模块并联结构时,隔离级需要同时实现低压直流母线电压控制以及模块电流均衡控制,对此,文章提出了采用低压直流母线电压外环和并联模块电流内环的双环控制结构。给出多双有源桥并联系统小信号建模方法,建立多双有源桥变换器并联的小信号模型,分析了电压调节器和电流调节器参数变化对系统特性的影响,为参数选取提供了理论依据。最后通过仿真分析验证了所提控制方法的有效性和建模方法的准确性。According to the requirement of low-voltage DC bus voltage control and module current sharing control under the multi dual active bridge converter parallel operation situation of power electronic transformer,a double loop control structure is proposed,in which the outer loop is used to implement the DC bus voltage control and the inner loop used to achieve module current sharing control.A multi dual active bridge parallel system modeling method based on small signal analysis is proposed,the small signal model of multi dual active bridge converter parallel is established,the effect of current parameters on the system performance is analyzed,and the control parameters are selected according to the analysis results.Simulation results are provided to validate the proposed control method and modeling method.

关 键 词：电力电子变压器 双有源桥变换器 控制方法 建模 小信号分析 

分 类 号：TM92[电气工程—电力电子与电力传动]