绝缘子迎/背风侧污秽不均匀分布特性及其对直流污闪电压的影响规律  

Pollution Distribution Performance of Windward/Leeward Sides of Insulators and Influential Rule on DC Pollution Flashover Voltage

作　　者：张东东 倪喜军[1] 程桂林[1] 李军[1] 郝思鹏[1] 张志劲[2] ZHANG Dongdong;NI Xijun;CHENG Guilin;LI Jun;HAO Sipeng;ZHANG Zhijin(Jiangsu Collaborative Innovation Center for Smart Distribution Network,Nanjing Institute of Technology,Nanjing 211167;State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China)

机构地区：[1]南京工程学院江苏省配电网智能技术与装备协同创新中心,南京211167 [2]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《高电压技术》2020年第4期1353-1360,共8页High Voltage Engineering

基　　金：江苏省自然科学基金(BK20181021);南京工程学院高层次引进人才科研启动基金(YKJ201819);国家重点研发计划(2016YFB0900904);江苏省配电网智能技术与装备协同创新中心开放基金(XTCX201902)。

摘　　要：局部地区污闪事故仍时有发生,深入对污秽外绝缘问题进行研究仍有具有现实意义。现场观测表明,绝缘子表面会呈现出明显的迎/背风侧不均匀积污现象,目前针对该现象仍缺乏系统性的研究,使得现有的积污测试手段及污秽外绝缘设计并不能完全反映实际情况。论文通过开展流体力学仿真及人工模拟试验,研究了绝缘子迎/背风侧污秽不均匀分布特性及其对直流污闪电压的影响规律。研究结果表明:绝缘子迎/背风侧污秽呈扇状不均匀分布,其污秽不均匀度J可达1/10;风速的增大、污秽粒径的增加及直流电场的作用均会使迎/背风侧污秽不均匀程度加重;迎/背风侧污秽不均匀分布下,绝缘子直流污闪电压降低幅度可达30%。研究结果可为输配电污秽外绝缘的选择及防污闪措施的开展提供指导。Accidents of pollution flashover still exists in certain areas. It is still of practical significance to further study external insulation pollution issues. The field observations have already shown that insulator surface is coated with obvious non-uniform pollution on windward and leeward sides. Lack of systematical research on this phenomenon makes the existing contamination tests and outdoor pollution insulation designs not to fully reflect the actual situations. Consequently, by carrying out fluid dynamic simulation and artificial tests, we studied the pollution distribution performance of the windward/leeward sides of insulator and their influential rule on DC pollution flashover voltage. Research results indicate that the contamination on insulator windward/leeward side is in fan-shape non-uniform distribution, and the non-uniformity may reach 1/10. The function of DC electric field, the increment of wind velocity, and particle diameters will enhance the pollution non-uniformity. Under windward/leeward side non-uniform pollution, insulator flashover voltage will subject to a considerable reduction of about 30%. The research results are of certain reference value for the external insulation design of high voltage transmission lines.

关 键 词：绝缘子 积污 直流污闪 不均匀污秽 风洞 流体力学 剩余污层电阻 

分 类 号：TM216[一般工业技术—材料科学与工程]