表面改性对绝缘子真空沿面闪络特性的影响

在不同温度下对交联聚苯乙烯绝缘子进行了表面氟化处理,在脉宽0.5μs的脉冲电压下对绝缘子的真空沿面闪络性能进行测试。结果表明:在50~60℃下对交联聚苯乙烯进行表面氟化能将绝缘子沿面闪络电压提高40%~60%。通过在绝缘子表面层规律地嵌入多个薄膜导电层,制备了新型结构的高梯度绝缘子,新型高梯度绝缘子沿面闪络电压较相同材料的普通绝缘子提高40%~50%,并保持了较好的力学及加工性能。

Influence of surface modification on vacuum flashover performance of insulators

Cross-link polystyrene insulators was fluoridized at different temperature，and the vacuum flashover properties was tested by impulse voltage with width of 0.5 s. The flashover voltage of cross-link polystyrene insulators was enhanced by 40%-60% after surface fluoridization at 50-60℃. Multilayer high gradient insulator with new structure was processed by incorporating conducting layers into the surface of insulator orderly, and the flashover voltage was enhanced by 40%-50%, compared with general insulator with the same material, while maintaining good mechanical and machining properties.