一种三相整流器的自然切换电流峰值控制策略  

A Natural Switching Current Peak Control Strategy for Three-phase Rectifier

作　　者：马伏军[1] 匡德兴 田雄 朱真 王逸超 王立娜 MA Fujun;KUANG Dexing;TIAN Xiong;ZHU Zhen;WANG Yichao;WANG Lina(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China;Economic and Technological Research Institute of State Grid Hunan Electric Power Co.Ltd,Changsha 410004,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082 [2]国网湖南省电力有限公司经济技术研究院,湖南长沙410004

出　　处：《湖南大学学报（自然科学版）》2022年第2期169-175,共7页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51977067)。

摘　　要：给出了T型三电平整流器的直流侧电压与交流侧电流的自然开关轨迹.基于该轨迹,将直接功率控制理论与自然开关轨迹理论结合,给出了自然切换控制方法.在该控制方法下,负载扰动时,输出电流超调严重,系统动态过程不平滑.针对该现象,依据直流变换器中电流峰值控制的思想,提出了适用于自然切换控制方法的电流峰值控制策略,即在原有自然开关轨迹上增加第三运行轨迹,对输出电流直接限幅控制,使得系统动态过程更为平滑.并在Matlab 2019a仿真环境中进行了验证.The natural switching trajectories of direct-current(DC)side voltage and AC side current of T-type three-level rectifier are presented in this paper.Based on this trajectory,the natural switching control method is developed by combining the direct power control theory with the natural switching trajectory theory.Under this control method,when the load is disturbed,the output current overshoot is serious and the dynamic process of the system is not smooth.In view of this phenomenon,according to the idea of current peak control in DC converter,a current peak control strategy suitable for natural switching control method is proposed,that is,adding a third running track to the original natural switching track and directly limiting the output current,so as to make the dynamic process of the system more smooth.It is verified in MATLAB 2019 a simulation environment.

关 键 词：T型三电平 瞬时功率理论 直接功率控制 自然开关轨迹 电流限幅 PWM整流器 

分 类 号：TM46[电气工程—电器]