基于小波去噪的暂态电压扰动检测方法研究  

Transient Voltage Disturbance Detecting Method based on Wavelet De-noising

作　　者：曹英丽[1] 陈春玲[1] 许童羽[1] 郑伟[1] 

机构地区：[1]沈阳农业大学信息与电气工程学院,沈阳110866

出　　处：《沈阳农业大学学报》2010年第1期116-118,共3页Journal of Shenyang Agricultural University

基　　金：辽宁省教育厅高校科研A类项目(2008635)

摘　　要：采用小波软阈值去噪方法对信号噪声进行预处理,很大程度地减小了噪声对扰动检测的干扰。利用小波多分辨率分析方法对去噪后的扰动信号进行检测,更精确地提取出了暂态电压扰动信号的特征值。在仿真环境中对去噪前后的电压骤降信号进行检测和比较。结果表明:去噪后的检测结果更接近于原始信号,小波软阈值去噪方法能够提高暂态电压扰动检测的准确性。Wavelet soft-threshold de-noising method was applied to preprocess the noisy signal,and the noise interference in disturbance detection was reduced to a great extent.Wavelet multi-resolution analysis method was used to detect de-noising disturbance signal,character values of the transient voltage disturbance signal were extracted more precisely.Comparing the detecting results between the de-noising voltage sag signal and the noisy one in the simulation environment,it showed that Wavelet soft-threshold de-noising method could improve transient voltage disturbance detecting accuracy.

关 键 词：暂态电压扰动 小波软阈值去噪 多分辨率分析 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置]