Research on the impact of soluble components in contaminations upon the pollution flashover characteristics of composite insulators

As service time of power grid transmission lines and steel frames increases, insulators are affected by contamination. Experiments on flashover characteristics under different salinities and salt types. Analyzes pollution layer conductivity, soluble salt conductivity and solubility. Under same equivalent salt density, pollution flashover voltage order is as stated. Under same concentration, conductivity order is as given. Soluble salt solubility and aqueous solution conductivity determine pollution layer conductivity. Significant for predicting composite insulator pollution flashover voltage and preventing power system pollution flashover.