基于数学形态学和网格分形的电能质量扰动检测及定位  

Power Quality Disturbance Detection and Location Based on Mathematical Morphology and Grille Fractal

作　　者：李庚银[1] 罗艳[2] 周明[1] 王宇宾[2] 

机构地区：[1]电力系统保护与动态安全监控教育部重点实验室(华北电力大学),河北省保定市071003 [2]石家庄供电公司,河北省石家庄市050051

出　　处：《中国电机工程学报》2006年第3期25-30,共6页Proceedings of the CSEE

基　　金：高等学校博士学科点专项科研基金(20040079002)~~

摘　　要：提出一种基于数学形态学和网格分形的电能质量扰动检测及定位方法。首先利用数学形态学理论构造一种多结构并行复合形态滤波器对扰动波形进行预处理,以滤除信号中的随机、脉冲等多种噪声;然后对滤波后的波形,根据网格的变化规律进行分析,提出一种简单快捷的奇异性检测判据,以准确快速地检测出扰动并进行时间定位。分别用电压骤降、电压骤升、谐波及其组合扰动对所提方法进行验证。数字仿真结果证实了其正确性和有效性。Based on mathematical morphology and grille fractal, a novel approach on power quality （PQ） disturbance detection and location is presented in this paper. At first a parallel-composed morphological filter with multiple structure elements is designed to filter random noise and impulse noise in PQ disturbance signals. Then, to the filtered results, an easy-implementation criterion for detecting singularity based on the grille change regularity is applied to locate the start and end time that the disturbance occurs. The voltage sag, swell, harmonic and their combined disturbances are used to verify the validity of the filter-location approach. Numerical results show that the proposed approach is valid and effective.

关 键 词：动态电能质量分析 扰动检测 数学形态学 形态滤波器 网格分形 

分 类 号：TM731[电气工程—电力系统及自动化]