励磁电流补偿方法的电流控制型单相动态电压恢复器的仿真研究  

Simulation Research of Single Phase Dynamic Voltage Restorer Based on Magnetizing Current Compensation and Current Control

作　　者：张允[1] 邹云屏[1] 吴振兴[1] 张杰[1] 王成智[1] 林磊[1] 

机构地区：[1]华中科技大学电气与电子工程学院,湖北省武汉市430074

出　　处：《中国电机工程学报》2008年第22期152-158,共7页Proceedings of the CSEE

摘　　要：在负载正常工作时所需的额定电压的基础上,该文讨论通过控制串联变压器二次侧工作电流来约束负载电流,从而使负载电压恒定。该文采用负载电流周期平均模型(perioda verage model,PAM)提高了负载电流跟踪额定电流的速度和精度,加快了动态电压恢复器(dynamic voltage restorer,DVR)系统的动态响应速度。考虑到负载电流中有小部分励磁电流分量,该文提出串联变压器励磁电流补偿(magnetizing current compensation,MCC)的方法。对比仿真结果显示MCC可提高负载电压的精度,并且验证了控制方法的有效性和实验的可行性。Based on the rated voltage that the normally working load needs, this paper discusses that the load current is restricted by controlling the secondary current of series transformer so as to meet the invariableness of the rated voltage. It also adopts that period average model （PAM） of load current to improve the speed and accuracy of the load current tracking the rated current and accelerate the dynamic response of dynamic voltage restorer （DVR）. Considering that the load current contains a little portion of the magnetizing current, this paper presents the approach of magnetizing current compensation （MCC）. The contrasted simulation results show that MCC can enhance the precision of load voltage and verify that the control method is effective and feasible in experimentation.

关 键 词：单相动态电压恢复器 电流直接控制 周期平均模型 励磁电流补偿 

分 类 号：TM761[电气工程—电力系统及自动化]