不同吸油率油浸纸板介电特性及电导特性研究  

Dielectric and conducive properties of oil-impregnated pressboard under different oil absorption

作　　者：徐征宇[1] 程涣超[1] 遇心如 李光范[1] 

机构地区：[1]中国电力科学研究院,北京100192

出　　处：《电机与控制学报》2015年第12期82-87,共6页Electric Machines and Control

基　　金：国家电网公司科技项目(GY71-13-035)

摘　　要：针对换流变压器主绝缘存在不同吸油率油浸纸板混用的问题,推导吸油率与油浸纸板介电常数εr的数学关系,试验测量不同吸油率条件下油浸纸板的介电常数,仿真分析吸油率对油纸绝缘电场分布的影响,最后试验研究电压、温度、吸油率对油浸纸板电导特性的影响,结果表明:介电常数试验结果与推导的数学关系吻合较好;吸油率的变化会使交流电场分布更加不均;直流电场作用下,电压、温度、吸油率的增加均导致油浸纸板电导电流增大。Aiming at the problem that the main insulation of convertor transformer was mixed with impreg- nated pressboard under different oil absorption, mathematic relation between the oil absorption and die- lectric constant er was deduced. Dielectric constant of impregnated pressboard under different oil absorp- tion condition was measured. Influence of absorption rate on the electric field distribution was simulated and analyzed. The experiments about conduction characteristics under different voltage, temperaturean- doll absorption were conducted. It turned out that the test results of dielectric constant fit well with the mathematic relation. The variation of oil absorption leads non-uniform degree of AC electric field worse. The eonduction current increases with the increase of voltage, temperatureand oil absorption.

关 键 词：油浸纸板 吸油率 介电常数 电导率 电压 温度 

分 类 号：TM854[电气工程—高电压与绝缘技术]