Electric Field Distribution of Soluble Salt Deposition on the Surface of Insulators in Railway Overhead Lines
作者机构：School of Automation&Electrical EngineeringLanzhou Jiaotong UniversityLanzhou 730070China Rail Transit Electrical Automation Engineering Laboratory of Gansu ProvinceLanzhou Jiaotong UniversityLanzhou 730070China
出 版 物：《Chinese Journal of Electrical Engineering》 (中国电气工程学报（英文）)
年 卷 期：2022年第8卷第3期
页 面：123-132页
核心收录：
学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：Supported by the National Natural Science Foundation of China(51767014) the Scientific and Technological Research and Development Program of the China Railway(2017J010-C/2017).
主 题：Catenary insulator soluble salt composition electric field intensity electrostatic field constant-current field
摘 要：Different constituents of soluble salts have different effects on the insulation performance of insulators.To study the electric field distribution of soluble salt deposition on the surface of high-speed railway insulators,a two-dimensional model of the cantilever insulator electrostatic field and constant-current field with soluble salt deposition is constructed.The simulation results indicate that the relative dielectric constant of dry pollution is the main factor that affects the electric field distribution on the surface of the insulator.The electric field intensity is arranged in the following order:CaSO_(4)KNO_(3)NaNO_(3)K_(2)SO_(4)NaClMgSO_(4),and the conductivity of each dirty liquid in the wet state becomes a key factor affecting the electric field distribution,which is specifically shown as sodium chloridenitratesulfate.The simulation results are compared with existing test results to verify that they were correct.It is also found that the electric field intensity of the insulator with good hydrophobicity is slightly greater than that of the insulator without hydrophobicity.The results provide a theoretical basis for the classification of regional pollution levels and the testing of insulator contamination in the laboratory.
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