基于热老化的局部放电非线性动力学特征  

Nonlinear dynamic characteristics of heat ageing based partial discharge

作　　者：罗荣韬 

机构地区：[1]长沙市电业局,湖南长沙410015

出　　处：《电力科学与技术学报》2010年第3期82-86,共5页Journal of Electric Power Science And Technology

基　　金：湖南省自然科学基金(04JJ40034)

摘　　要：以广泛用于变压器等高压电气设备中的绝缘材料(环氧树脂板)为研究对象,对试品进行热老化处理,每隔一定时间做局部放电实验.分析所采集的局放信号的混沌特征参数,如李雅普诺夫指数(Lyapunov)、柯尔莫哥罗夫熵(Kolmogorov entropy)及关联维数(correlation dimension)等等.对比分析不同热老化阶段的混沌指数,表明:绝缘的局部放电检测信号是具有混沌特征的时间序列,并随绝缘材料的老化混沌程度加深.Epoxy resin is widely used in high voltage power equipments such as power transformer. The epoxy resin is treated with heat aging, and partial discharge （PD） experiments are carried out at fixed time intervals. The PD signals and their non-linear dynamic chaos characteristics （such as maximum Lyapunov exponent, fractal dimension and Kolmogorov entropy） are analyze in this paper. Their variation trend and orderliness are compared in different heat ageing stages. Results show that the PD signals are time series with chaos characteristics, the chaos degree will be high with ageing.

关 键 词：局部放电 非线性动力学 混沌特征 热老化 

分 类 号：TM835[电气工程—高电压与绝缘技术]