提高特高压直流瓷绝缘子污秽闪络电压的研究  

Study on Improving Pollution Flashover Voltage of UHVDC Porcelain Insulators

作　　者：金哲 程绳 尹洪 吴向东 万欣 张德赛[2,3] 胡伟 刘琴[4] JIN Zhe;CHENG Sheng;YIN Hong;WU Xiang-dong;WAN Xin;ZHANG De-sai;HU Wei;LIU Qin(Maintenance Company of State Grid Hubei Electric Power Company,Wuhan 430050,China;School of Electrical Engineering,Wuhan University,Wuhan 430072,China;Hubei Xin Desai Insulation Technology Co.,Ltd.,Wuhan 430072,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]国网湖北省电力公司检修公司,湖北武汉430050 [2]武汉大学电气工程学院,湖北武汉430072 [3]湖北鑫德赛绝缘技术有限公司,湖北武汉430072 [4]中国电力科学研究院,北京100192

出　　处：《水电能源科学》2018年第12期171-173,共3页Water Resources and Power

基　　金：国网湖北省电力公司科学技术资助项目(SGHBJX00JMJS1700213)

摘　　要：瓷绝缘子作为一种重要的输电线路设备,在我国特高压直流输电工程中应用广泛,但在直流电场作用下,其静电集尘效应使绝缘子表面积污严重,污闪概率比交流电场大为增加。为了减少直流瓷绝缘子的污闪概率,将原有绝缘子作为母体,根据电场分布理论、气体放电理论和沿面放电理论,通过设置附件系统来抑制污秽放电现象的发展,从而达到提高绝缘子污秽闪络电压的目的。试验结果表明,在未改变绝缘子的电气距离和结构参数的情况下,应用附件系统可大幅度提高污秽闪络电压。这对提高特高压直流瓷绝缘子的污秽闪络电压具有一定的指导意义。As an importanttransmission line equipment,porcelain insulators are widely used in China's HVDC transmission projects.However,under the action of DC electric field,the electrostatic precipitation effect makes the surface of insulators more serious,and the pollution flashover probability greatly increases than that under AC.In order to reduce flashover probability of DC porcelain insulators,the original insulator is taken as the parent body.According to electric field distribution theory,gas discharge theory and surface discharge theory,the attachment system is set up to suppress the development of contamination discharge so as to achieve the goal of improving contamination flashover voltage of insulators.The experimental results show that the application of the attachment system can greatly increase contamination flashover voltage without changing electrical distance and structural parameters of the insulator.The research results have certain guiding significance to improve contamination flashover voltage of UHVDC porcelain insulators.

关 键 词：特高压直流 瓷绝缘子 附件系统 污秽闪络特性 

分 类 号：TM216[一般工业技术—材料科学与工程]