FFT频域分析算法抑制窄带干扰的研究  

Research of Spectrum Analysis based on FFT for Suppressing Narrow band Interference in PD Signal

作　　者：谢良聘[1] 朱德恒[1] 

机构地区：[1]清华大学,北京100084

出　　处：《高电压技术》2000年第4期6-8,共3页High Voltage Engineering

基　　金：国家自然科学基金;东北电力集团公司联合资助项目! (批准号 :5 96 372 0 0 )

摘　　要：抑制干扰是信息处理的关键技术 ,滤除窄带干扰则是其中的重要内容。针对窄带干扰改进了基于 FFT滤波的频域分析算法 ,研究其滤除干扰的能力、对局放波形的畸变及所需计算时间等 ,并据此设计了有效的滤波器。In on line monitoring system of partial discharge (PD), the suppression of interference is one of the key techniques of signal processing, and the elimination of narrow band interference is an important component. In order to eliminate narrow band interference effectively, based on FFT, the method of spectrum analysis, the elimination ability of narrow band interference, deformation of PD signal, calculating time, and design of effective filters are discussed. This method gets well results in computer simulation test and processing of field sampling data.

关 键 词：局部放电 窄带干扰 频域分析法 FFT 电力设备 

分 类 号：TN911.4[电子电信—通信与信息系统]