油纸绝缘设备的回复电压曲线仿真分析  

Simulation Analysis on Return Voltage Curve of Oil-Paper Insulation Equipment

作　　者：张涛[1] 冉华军[1] 

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《电工电气》2012年第1期5-8,13,共5页Electrotechnics Electric

基　　金：福建省自然科学基金资助项目(2010J01283);三峡大学科研启动基金项目(0620100031)

摘　　要：回复电压方法能有效地测量绝缘介质的极化特征量,无损诊断电力设备的绝缘状态。基于油纸绝缘介质的极化特性,利用等值电路模型建立了回复电压特征量与绝缘状态之间的关系,仿真并分析了电路参数的改变引起特征量和回复电压曲线的变化规律。仿真结果表明,回复电压主时间常数特征量能诊断不同几何电容的电力设备的绝缘状态,是诊断绝缘状态的有效特征量。Return voltage measurement is a non-destructive electrical insulation diagnostic method, which can effectively diagnose condition of oil-paper insulation equipment. This paper established the relationship between return voltage characteristic quantities and insulation condition using equivalent circuit model based on dielectric polarization characteristics. The change laws of return voltage curve caused by variation of circuit parameters were simulated and analyzed. Simulation results show that dominant time constant is an effective characteristic quantity for diagnosing insulation condition of power equipment with different geometric capacitance.

关 键 词：回复电压 绝缘状态 无损诊断 主时间常数 

分 类 号：TM855[电气工程—高电压与绝缘技术]