Research on Rainwater Cleaning Law of Suspension Porcelain Insulator

It is important to study the rainwater cleaning law of insulators for instructing outdoor insulation configuration and predicting the pollution degree in a region. The natural contaminated double-shed porcelain insulators were obtained from Hengde 2E22 Transmission Line in Yancheng, Jiangsu Province in this paper. First, simulated rainfall tests of natural contaminated insulators were carried out. The test results showed that the law of soluble contamination loss with time under constant rain intensity corresponds to the first-order kinetic model or the expended Gompertz model and the parameters of both models have certain physical meanings. Next, natural rainfall test was carried out in the spring and summer 2015. The empirical formula of contamination cleaning rate of upper surface of natural polluted double-shed porcelain insulator was proposed. This empirical formula can be used to predict the degree of contamination accumulation on double-shed porcelain insulator in a certain area and instruct outdoor insulation configuration of transmission line.