基于无差拍控制的PWM整流器并联运行  

Based on Deadbeat Control in Parallel Operation of PWM Rectifiers

作　　者：皋艳[1] 王永生[1] 丁星星[1] 马炜程 

机构地区：[1]合肥工业大学宣城校区信息工程系,安徽宣城242000

出　　处：《电力电子技术》2016年第12期63-65,83,共4页Power Electronics

摘　　要：共享直流母线和交流母线的三相并联脉宽调制(PWM)整流器可提高系统容量,但可能引起环流问题,导致三相电流不平衡、增加器件损耗、降低系统效率。针对环流问题,建立了其在三相静止坐标系下的数学模型,分析了环流的产生机理及影响因素。因此,提出了一种电压外环采用比例积分(PI)调节,电流内环采用无差拍控制(DBC)的控制策略,并将其运用于整流器并联系统。该方法动态响应速度快,适用于采用通信配合的三相整流器并联系统。最后,搭建了并联系统实验平台并进行了实验,验证了所提控制策略的可行性。The parallel system of three-phase pulse width modulation（PWM） rectifiers which share DC bus and AC bus can improve the capacity of the system, but it can cause the circulating current problem.In view of circulating current problem, the mathematical model under the three-phase stationary frame is established, the mechanism and the influencing factors of the circulating current are analyzed.On this basis,a control strategy which outer voltage loop adopting proportional integral （P I） regulation and internal current loop adopting deadbeat control （DBC） is proposed. Due to its fast dynamic response, the method can be applied to parallel system of three-phase PWM rectifiers with communication.Finally,the feasibility of the proposed control method is verified by the experiments.

关 键 词：整流器 并联系统 环流 无差拍控制 

分 类 号：TM461[电气工程—电器]