移相控制的双有源桥DC-DC变换器统一相量分析法  

Unified Phasor Analytical Method for Bi-Directional Dual-Active-Bridge DC-DC Converter under Phase-Shift Control

作　　者：沙广林[1,2] 王聪 程红[1] 邓嘉卿[1] 王健宇[1] Sha Guanglin;Wang Cong;Cheng Hong;Deng Jiaqing;Wang Jianyu(School of Mechanical Electronic & Information Engineering China University of Mining & Technology (Beijing) Beijing 100083 China;Beijing Key Laboratory of Distribution Transformer Energy-Saving Technology China Electric Power Research Institute Beijing 100192 China)

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083 [2]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

出　　处：《电工技术学报》2017年第18期175-185,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金项目(51077125;51577187);国家电网公司基础前瞻性科技项目(PD71-17-024)资助

摘　　要：提出一种用于分析移相控制双有源桥直流变换器的控制特点、功率的传输与交换特性的交流相量分析方法。通过傅里叶级数分解将变换器的动态方程转化为稳态相量表达式,从而建立适用于单移相控制、扩展移相控制以及双重移相控制的统一复功率模型,得出功率分布区域。根据变换器稳态相量表达式得出不同控制方式所对应相量分析图,并提出不同移相控制策略的实际控制区域。仿真和实验结果与理论分析一致,验证所建立复功率模型的准确性。该分析方法避免了传统瞬时功率积分方法建立移相控制直流变换器功率模型过程中计算复杂、模型不统一以及物理意义不明确等问题,方便了多控制自由度情况下,变换器控制策略的选择与设计。A unified phasor analytical method is introduced in this paper to analyze the control and power characteristics of bi-directional dual-active-bridge dc-dc converter under all phase-shift control strategies.Fourier transform theory is utilized to translate time-domain differential equation of ac-ac stage in dc-dc converter into steady-state phasor expression.Hence,the phasor diagrams are plotted.The respective control regions for single-phase-shift control,extended-phase-shift control and dual-phase-shift control are proposed.A uniform complex power model is built which holds for all phase-shift controls.The simulations and experimental results show good coherence to the theoretical analysis,and also show the applicability and creditability of the proposed model and unified phasor analytical method.

关 键 词：双有源桥直流变换器 移相控制 功率模型 相量分析法 

分 类 号：TM46[电气工程—电器]