AC/DC整流器并联均流新型下垂控制策略  

Current sharing strategy of AC/DC rectifiers based on new droop control

作　　者：李文善 温旭辉[1,2,3,4] 张剑[2,3,4] LI Wen-shan;WEN Xu-hui;ZHANG Jian(School of Electronic,Electrical and Commutation Engineering,University of Chinese Academy of Science,Beijing 100049,China;Institute of Electrical Engineering,Chinese Academy of Science,China;Key Laboratory of Power Electronics and Electric Drive,Institute of Electrical Engineering,Chinese Academy of Sciences,100190,China;Collaborative Innovation Center of Electric Vehicles in Beijing,Beijing 100190,China)

机构地区：[1]中国科学院大学电子电气与通讯工程学院,北京100049 [2]中国科学院电工研究所,北京100190 [3]中国科学院电力电子和电气驱动重点实验室,北京100190 [4]北京电动汽车协同创新中心,北京100190

出　　处：《电机与控制学报》2020年第7期62-72,共11页Electric Machines and Control

基　　金：国家重大研发计划项目(2016YFB0100600);北京市自然科学基金(3192041)。

摘　　要：为降低传统下垂控制造成的母线电压衰减,提出一种基于AC/DC整流器等效阻抗差的改进型下垂控制策略,并应用于解决中小型运载器的发供电系统均流问题。分析了AC/DC整流器的dq轴模型及其等效电路,并据此给出等效阻抗计算式。在确定并联整流器的等效阻抗相对关系的前提下,建立AC/DC整流器输出电流差和电压差之间的数学模型,并以此为基础,针对等效阻抗较大的整流器设计下垂控制器。为验证所提策略的有效性,建立了永磁同步发电机—整流器并联系统的仿真模型和实验平台。仿真分析了等效阻抗和控制参数对均流性能的影响。仿真和实验结果表明,基于整流器等效阻抗差的下垂控制能够在降低母线电压衰减的基础上实现均流,该方法尤其适合高压小电流的AC/DC整流系统。Due to the voltage deviation of conventional droop control method,a new droop control strategy was proposed based on equivalent impedance difference for current sharing between AC/DC rectifiers.Then,it was applied to solve the current sharing problems against the source system of small and medium vehicle.Expression of the equivalent impedance was deduced according to d-q axis model and equivalent circuit of the AC/DC rectifier.The model between dc current difference and voltage deviation was developed in this paper.Droop control strategy was designed based on the model of equivalent impedance difference,and then applied to the AC/DC rectifier which has greater equivalent impedance.As verification to the proof-of-concept,a hardware prototype of permanent magnet synchronous generators and AC/DC rectifiers is developed.The effects of the equivalence resistance and the control factors were analyzed by simulation.The simulation and experimental results exhibit a good current sharing with low DC bus voltage reduction,and the method proposed is applicable to high voltage AC/DC system with low operating current.

关 键 词：AC/DC整流器 均流 下垂控制 母线电压衰减 等效阻抗差 

分 类 号：TM46[电气工程—电器]