电容绝缘子的场路耦合特性分析

Analysis of field-circuit coupling characteristic of capacitive insulator

基于电容绝缘子的电气和结构特性,首先搭建了电路模型,建立了电容参数计算模型;其次采用有限元法建立了电场仿真模型,得到绝缘子两端电压,并将其作为电场仿真模型的输入,从而建立了场路耦合模型;最后以某电容绝缘子为例,仿真分析了其正常和异常情况下的电场特性。研究结论可为电容绝缘子的劣化检测提供依据。

Aiming at the electric property and structure characteristics of capacitive insulator,this paper firstly establishes the model of calculation for electrical parameters of capacitive insulator based on the finite element method(FEM),and sets up a circuit model for the circuit topology based on the insulator.Secondly,a simulation model of electric field of capacitor insulator is established by FEM to obtain the voltage between the ends of insulator,which is taken as an input voltage condition of electric field simulation model,so as to realize the establishment of field-circuit coupling model;Lastly,with one capacitive insulator for example,the electric field characteristics in normal and abnormal conditions are analyzed.The research conclusion can provide basis for the detection of partial discharge in capacitive insulator.