动态电压恢复器的负载电流直接控制策略  

Load Current Direct Control Strategy of Dynamic Voltage Restorer

作　　者：张允[1] 胡晓磊 邹云屏[1] 童力[1] 

机构地区：[1]华中科技大学,湖北武汉430074 [2]台达能源技术有限公司,上海201209

出　　处：《电力电子技术》2009年第5期5-6,31,共3页Power Electronics

基　　金：湖北省自然科学基金资助项目(2007ABA051)~~

摘　　要：动态电压恢复器能有效抑制电力系统电压跌落和隔离电网谐波,改善电能质量,因而具有广阔的应用前景。传统的动态电压恢复器一般为电压源型逆变器,需要实时检测电网电压的状况以计算差值,对信号检测的实时性和控制的快速性提出了较高的要求。提出了一种以控制串联变压器工作电流来约束负载额定电流,从而间接控制负载额定电压的方法。实验结果验证了该方法准确性和可行性。Dynamic Voltage Restorer （DVR） can effectively suppresses the voltage sag and isolates voltage harmonic, so it is an excellent potentiality in power quality improvement.Traditional DVR is usually voltage inverter,the control strategy need to execute the real-time detection for the voltage value of network and count error.Therefore,the traditional DVR demands higher performance signal detecting and processing system.Based on the rated current, a method which restricts the load rated current by controlling the secondary current of series transformer is presented, thus, it is equivalent to meet the rated voltage indirectly.The experimental results show that the presented control strategy is effective and feasible in DVR.

关 键 词：逆变器 谐波 控制/有源电力滤波器 

分 类 号：TM46[电气工程—电器]