一种新的局部放电超声信号脉冲边缘提取算法  

A New Method for Pulse Edges Extraction from Partial Discharge Ultrasonic Signal

作　　者：朱太云[1] 杨道文[1] 叶剑涛[1] 程登峰[1] 王庆军[1] 李承斌[2] 

机构地区：[1]安徽省电力科学研究院,安徽合肥230022 [2]合肥供电公司,安徽合肥230022

出　　处：《安徽电气工程职业技术学院学报》2012年第3期1-4,共4页Journal of Anhui Electrical Engineering Professional Technique College

摘　　要：本文针对GIS局部放电检测常用的超声波法,构建了超声信号测量系统,提出了一种新的基于移动窗信号方差阀值的超声信号脉冲边缘提取算法,可以有效的从滤波后的数据中查找出单个脉冲波形起始和结束位置,从而提取脉冲波形,为进一步实现超声波形信号特征提取和缺陷模式识别提供了基础。Aiming at the usually used ultrasonic method for GIS partial discharge detection, an ultrasonic signal testing and measurement system is constructed. A new pulse edges extraction method based on the moving window variance threshold is proposed and used. The start and end position of the ultrasonic par- tial discharge pulse waveform can be found out from the de-noised data, the pulse waveform can be easily extracted using the method. This provides a foundation for the extraction of ultrasonic signal features and defect pattern recognition.

关 键 词：局部放电 超声信号 滤波 边缘提取 

分 类 号：TM643[电气工程—电力系统及自动化]