基于数学形态学的微网电压补偿量检测方法  

A New Detection Method for Microgrid Voltage Compensation Based on Mathematical Morphology

作　　者：崔红芬[1] 李鹏[1] 王畅[1] 

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),河北省保定市071003

出　　处：《中国电机工程学报》2013年第16期122-128,10,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50977029)~~

摘　　要：针对动态电压恢复器对电压跌落检测精度和实时性的要求,提出基于数学形态学的电压补偿量直接检测方法。电压跌落信号经dq0变换和形态滤波后,通过电压补偿量直接检测方法可直接得到电压跌落补偿量,且该方法可以弥补经形态学滤波运算和dq0反变换后得到的基波正序电压分量可能与标准电压存在的偏差,不需要将电压扰动分量一一检测出来,并且不必检测电压相位,方法简单,计算量小。同时针对形态滤波问题,提出形态学滤波器结构元素宽度选择的一般公式。For the requirements of dynamic voltage restorer （DVR） on voltage detection accuracy and real-time, the direct detection method of voltage compensation based on mathematical morphology was proposed. Voltage sag can be detected through dq0 transformation, morphological filtering and the direct detection method of voltage compensation. The method can make up for the possible deviation between the standard voltage and the fundamental positive sequence voltage component by morphological filtering computing and dq0-inverse transformation. Meanwhile, the voltage disturbance components do not need to be detected respectively, without detecting the voltage phase. The method is simple and with small amount of calculation. As to the filter problem, a general formula which is about choosing the width of the morphological filter structure element was also proposed.

关 键 词：微网 电能质量 动态电压恢复器 DQ0变换 数学形态学 

分 类 号：TM71[电气工程—电力系统及自动化]