基于模糊自适应形态滤波器和S变换的暂态电能质量扰动检测  

Transient power quality disturbances detection based on fuzzy adaptive mathematical morphology filter and S-transform

作　　者：郝晓弘[1] 郝守庆[2] 胡振邦[1] 郑伟[3] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]山推工程机械股份有限公司,山东济宁272000 [3]甘肃电力科学研究院,甘肃兰州730000

出　　处：《电力系统保护与控制》2011年第17期98-102,共5页Power System Protection and Control

基　　金：甘肃省自然科学基金(0809RJZA006);国家电网甘肃电力公司科研项目(2010406020)~~

摘　　要：提出一种基于模糊自适应形态学滤波器与S变换结合的暂态电能质量扰动检测方法。该方法根据数学形态学理论和模糊控制原理构造一种模糊自适应形态学滤波器,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,可较好地保留信号的基本特征,对于滤波后的信号波形,利用S变换幅值包络线对暂态电能质量扰动起止时间进行检测。最后通过对噪声背景下含电压骤升、电压中断和电压骤降电磁暂态现象的电压信号进行仿真验证,结果表明该方法具有计算简单、快速和准确的特性和优点。This paper proposes a novel detection approach for transient power quality （PQ） disturbance based on fuzzy adaptive mathematical morphology filter and S-transform. At first, a fuzzy adaptive morphological filter is designed to pretreat the disturbance wave to filter random/impulse noise in PQ disturbance signals. Thus the filter can hold the fundamental characteristics of original signals. Then, regarding the filtered signals, the amplitude envelope based on S-transform is applied to detect the start and end time that the disturbance occurs. Finally, voltage signals which contain noise and electromagnetic transient phenomena, such as voltage swell, interruption and voltage sag, are illustrated in simulation.Thesimulation results show that the proposed detection approach has the feature and advantages of being simple, rapid and accurate. This work is supported by Natural Science Founfialion of Gansu Province （No. 0809RJZA006）.

关 键 词：数学形态学 模糊控制 S变换 电能质量 扰动检测 

分 类 号：TN713[电子电信—电路与系统] TM711[电气工程—电力系统及自动化]