高频链矩阵变换器直接功率反步控制策略  

Direct power backstepping control strategy for high frequency chain matrix converter

作　　者：魏业文[1,2] 白文静 李明 WEI Yewen;BAI Wenjing;LI Ming(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Research Center of Intelligent Energy Technology,Yichang 443002,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002 [2]智慧能源技术湖北省工程研究中心,湖北宜昌443002

出　　处：《电机与控制学报》2024年第7期55-64,共10页Electric Machines and Control

基　　金：国家自然科学基金青年基金(52107108);智慧能源技术湖北省工程研究中心开放课题(2020ZHLY06)。

摘　　要：针对高频链矩阵变换器(HFLMC)电路前后级耦合导致系统动态性能和鲁棒性降低的问题,提出一种基于直接功率的非线性反步控制策略(BS-DPC)。首先,建立HFLMC非线性数学模型和有功、无功功率动态模型,分析双极性电流空间矢量调制策略;然后,在考虑系统不确定性情况下引入2个解耦控制分量,设计直流输出电流和无功功率反步控制器,实现电池不同工况下输出电流参考值的快速跟踪控制;最后,根据李雅普诺夫稳定性理论证明HFLMC闭环系统全局渐进稳定性,并对比传统PI直接功率控制和BS-DPC策略。仿真和实验结果表明,所提BS-DPC策略控制HFLMC提高了输出电流的动态性能和电网波动及直流滤波电感变化下的鲁棒性,响应时间减少了约78%,网侧THD降低了0.98%。A nonlinear backstepping control strategy based on direct power(BS-DPC)was proposed to solve the problem that the dynamic performance and robustness of the system are reduced due to the coupling of the high-frequency link matrix converter(HFLMC)circuit.The nonlinear mathematical model of HFLMC and the dynamic model of active and reactive power were established,and the bipolar current space vector modulation strategy was analyzed.At the same time,considering the uncertainty of the system,two decoupling control components were introduced,and the DC output current and reactive power backstepping controller were designed to realize the fast tracking control of the output current reference value under different working conditions of the battery.According to the Lyapunov stability theory,the global asymptotic stability of the HFLMC closed-loop system was proved.Compared with the traditional PI direct power control and BS-DPC strategy,the simulation and experimental results show that the proposed BS-DPC strategy control HFLMC improves the dynamic performance of the output current and the robustness under grid fluctuation and DC filter inductance change.The proposed control strategy reduces the dynamic response time of the system by approximately 78%.The THD reduction on the grid side is 0.98%with the proposed control strategy.

关 键 词：高频链矩阵变换器 双极性电流空间矢量调制 PI直接功率控制 直接功率反步控制 动态响应 鲁棒性 

分 类 号：TM461[电气工程—电器]