工厂复合化绝缘子电场分布特性及防污闪涂层参数优化计算

为研究工厂复合化直流绝缘子在不同涂层厚度及涂覆工艺下的电场分布特性,利用传导电流场进行有限元仿真,分别对无涂覆涂层绝缘子、全涂覆涂层绝缘子、局部涂覆涂层绝缘子、不同涂层厚度下的绝缘子电场分布情况进行计算。计算分析表明,工厂复合化瓷和玻璃绝缘子,在厚度不低于0.3 mm的RTV涂层全覆盖绝缘体表面时,钢脚边缘(涂层边缘)的最大电场强度不超过空气中的电晕起始场强;当RTV涂层在钢脚附近存在留空时,钢脚边缘的电场强度均较高。研究结果为工厂复合化绝缘子的防污闪涂层的参数优化设置提供了指导。

Distribution of Electric Field and Optimization of Anti-pollution Flash Coating Parameters for Factory-Composited Insulators

In this paper, the distribution of electric field of factory- composited DC insulators under different coating thicknesses and coating processes was simulated on the basis of finite element method for the constant electric field simulation. The distributions of electric field of the insulators including without RTV coating coated insulator, fully RTV coating coated insulator, partially RTV coating coated insulator and different RTV coating thickness insulator were obtained through simulation analysis. The calculated results show that the maximum electric field strength around the pin (coating edge) will not exceed the corona onset field strength in the air both for factory-composited porcelain and glass insulators when the RTV coating thickness is not less than 0.3 mm and the coat completely covers the surface of the insulator. While the electric field strength at the edge of the steel foot is very high when coating blank exists near the pin. The results in this paper provide guidance for optimizing the parameters of the anti-fouling flash coating of factory-composited insulators.