CAJ | 학술논문

绝缘子污闪事故严重威胁电力系统的安全可靠运行。为完善污秽绝缘子闪络特性、机制及闪络过程的认识，为输电线路外绝缘的选择和设计提供参考依据，基于人工气候室的试验对瓷、玻璃及复合绝缘子闪络特性及泄漏电流特性进行了研究。研究结果表明：绝缘子闪络电压随着盐密、灰密及雾水电导率的增加而减小；瓷、玻璃绝缘子闪络电压不随污秽迁移时间的变化而变化，复合绝缘子闪络电压随着迁移时间的延长而增大；闪络过程中，复合绝缘子泄漏电流有效值及脉冲数远低于瓷和玻璃绝缘子；相同试验条件下，复合绝缘子的表面电阻远大于瓷与玻璃绝缘子的表面电阻。
절연자오섬사고엄중위협전력계통적안전가고운행。위완선오예절연자섬락특성、궤제급섬락과정적인식，위수전선로외절연적선택화설계제공삼고의거，기우인공기후실적시험대자、파리급복합절연자섬락특성급설루전류특성진행료연구。연구결과표명：절연자섬락전압수착염밀、회밀급무수전도솔적증가이감소；자、파리절연자섬락전압불수오예천이시간적변화이변화，복합절연자섬락전압수착천이시간적연장이증대；섬락과정중，복합절연자설루전류유효치급맥충수원저우자화파리절연자；상동시험조건하，복합절연자적표면전조원대우자여파리절연자적표면전조。
The pollution flashover accidents of insulators on transmission lines do serious harm to the safe operation of power grid. In order to improve the understanding of flashover performance, mechanism and flashover process of polluted insulators, and provide a reference basis for the selection and design of the external insulation of transmission line. This paper deals with the flashover performance and leakage current performance of polluted insulators by analyzing the results of laboratory experiments. The results show that the flashover voltage decreases with the increasing of salt deposit density (SDD), non-soluble deposit density(NSDD) and fog conductivity; the flashover voltage of porcelain and glass insulators isn’t related to transition time, and the flashover voltage of composite insulators increased with the increasing of transition time. In the process of flashover, the leakage current and the pulse number of composite insulator are far less than that of porcelain and glass insulators. Under the same test conditions, the surface resistance of composite insulator is far greater than that of porcelain and glass insulators.