高压开关柜内部气隙放电模型及其电场分析

针对高压开关柜中典型的内部气隙放电,建立内部气隙放电有限元分析模型.通过气隙处电场分析,得到该模型的电晕起始电压和电晕层厚度,并研究气隙模型参数对内部气隙处电场分布变化的规律.在此基础上,研制出内部气隙放电模型实物,并搭建高压开关柜局部放电模拟试验平台,测量内部气隙放电模型的电晕起始电压.结果表明:实验结果与仿真结果相近,证明模型有限元分析及实物研制的一致性.

Air-Gap Discharge Model and Electric Field Analysis of High-Voltage Switchgear

Aiming at the typical air-gap discharge in high-voltage switchgear, the finite element analysis model of the air-gap discharge was established, the corona inception voltage and corona layer thickness of the model were obtained by the electric field analysis at the air-gap model, meanwhile, the impact and the variation of the electric field distribution at the air-gap was studied by the model parameter. On this foundation, air-gap discharge model is developed. Finally, simulation test platform of the high-voltage switcher partial discharge was built to measure the corona inception voltage of the air-gap discharge model. The results show that the experimental results are in good agreement with the simulation results, which proves the consistency of the model finite element analysis and the developed model.