基于耦合混沌的局部放电信号检测  

Detection on Partial Discharge Signal Based on Coupling Chaos

作　　者：徐艳春[1] 陈国训 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌433002

出　　处：《广东电力》2015年第3期66-69,共4页Guangdong Electric Power

基　　金：三峡大学人才科研启动基金资助项目(KJ2013B079)

摘　　要：为了有效地检测局部放电脉冲信号,利用双耦合Duffing混沌振子瞬态同步突变现象对脉冲信号的敏感性和对白噪声的免疫能力,将双耦合Duffing振子应用于电机局部放电脉冲信号的检测中。根据局部放电脉冲信号的时频特性,构建适于局部放电检测的双耦合Duffing振子系统,设置双耦合Duffing振子的初始值、耦合因数、外部策动力的周期和幅值,以振子间的同步误差来检测微弱的局部放电信号。仿真测试结果表明,利用该方法检测局部放电脉冲信号,在低信噪比的条件下能取得良好的检测效果。In order to effectively detect partial discharge（PD）pulse signals,double coupling Duffing oscillators were applied in detecting PD pulse signals of the electrical machine on the basis of sensitivity of transient synchronous mutations of the double coupling Duffing chaotic oscillators on pulse signals and immunocompetence to white noise.According to time-domain characteristics of PD pulse signals,double coupling Duffing oscillator system for PD detection was constructed.Meanwhile,initial values,coupling factors,periods and amplitudes of external driving force of the double coupling Duffing oscillators were set and synchronous errors of oscillators were used for detecting PD signals.Simulation testing results indicate that this method could get good detection effects under low signal to noise ratio（SNR）condition.

关 键 词：局部放电 脉冲检测 双耦合Duffing振子 瞬态同步突变 白噪声 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]