基于形态滤波的电压跌落检测  

Voltage sag detection based on morphological filter

作　　者：郭志成[1] 周德东[1] 吴记群[2] 边玉国[1] 

机构地区：[1]兰州工业学院电气工程学院,兰州730050 [2]兰州工业学院电子信息工程学院,兰州730050

出　　处：《工业仪表与自动化装置》2015年第6期37-40,共4页Industrial Instrumentation & Automation

基　　金：兰州工业学院青年科技创新项目(13K-011)

摘　　要：对动态电压恢复器中常用的单相电压跌落检测方法进行了研究,针对常用的低通滤波器对检测方法的检测精度和实时性的影响和制约问题,提出了基于数学形态滤波的单相电压跌落检测方法。通过选取适当的结构元素,结合形态学的基本运算,设计出适合单相电压跌落检测的低通滤波器,以此来提高检测方法的检测精度和实时性。理论分析和仿真实验都验证了其可行性,形态滤波器运算简单,速度快,能够很好地满足电压跌落检测要求。The single- phase voltage sag widely used in the dynamic voltage restorer is studied. To avoid the impact of the low- pass filter on the accuracy and real- time of voltage sag detection,a detection method based on mathematical morphology filter is presented,which selects the appropriate morphologic structure elements and combines with the proper morphologic operators to design a low- pass morphological filter for improving the accuracy and real- time of detection method. Theoretical analysis and experimental results prove that,the operation of morphological filter is simple and fast,meeting the requirements of voltage sag detection.

关 键 词：动态电压恢复器 αβ-dq变换 电压跌落 数学形态滤波器 

分 类 号：TM862[电气工程—高电压与绝缘技术]