基于耐电痕分析的防污闪涂料耐候性研究

Study on Weather Resistance of Theanti-pollution Flashover Coatings Based on Analysis of the Electrical Tracking and Erosion Test

PRTV防污闪涂料能够有效改善高压电器绝缘材料的表面状态,提高电力系统表面憎水性。而在运行中的防污闪涂料受到紫外光、盐腐、热、凝露等作用,会出现耐污性能的下降。文中以PRTV防污闪涂料为研究对象,通过FTIR测试对比了防污闪涂料在紫外老化、盐腐老化、冷热冲击老化和水煮老化过程中分子结构变化,耐电痕性能影响。研究表明,0.46 mm厚防污闪涂料能够满足1A2.5级要求,接触角提高10%以上,老化试验条件促进了防污闪涂料的交联固化,冷热冲击老化试样的耐电痕性能影响最差。

Permanentroom temperature vulcanized(PRTV)silicone rubber can be used to improve the hydrophobici-ty of the insulating material surface,and to improve the running state of the high voltage electrical appliances.Under the long-term use conditions,the anti-pollution flashover coatings effected by ultraviolet(UV)light,salt corrosion,heat,condensation,and others,will appear the degradation of anti-pulltion flashover ability.In this paper,PRTV was taken as the research object,and FTIR test was used to compare the changes of molecular structure and the influence of electric mark resistance of anti-pollution flashover coating in the process of UV aging,salt corrosion aging,cold and hot impact aging and water boiling aging.The result shows that 0.46 mm thick anti-pollution flashover coating can meet the requirements of grade 1A2.5 according to the electrical tracking and erosion test standard,the contact angle increased by more than 10%,the short-time aging promoted the cross-linking curing of anti-pollution flash coating,and the cold and hot impact aging sample had the worst effect on the electrical tracking and erosion resistance.