不同试验方式对绝缘子污闪特性的影响研究  

Study on the Influence of Different Testing Method on Polluted Flashover Performance of Insulators

作　　者：陈吉 蒋兴良[2] 陈成瑞 李新梁 CHEN Ji;JIANG Xingliang;CHEN Chengrui;LI Xinliang(Engineering Department,Chongqing 400065,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Chongqing 400044,China)

机构地区：[1]重庆工程学院,重庆400065 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044

出　　处：《电瓷避雷器》2020年第6期241-248,共8页Insulators and Surge Arresters

基　　金：重庆市教委科学技术研究项目(编号:KJZD-K201901901);重庆工程学院科研基金项目(编号:2019gcky03)。

摘　　要：绝缘子污闪严重威胁电力系统安全运行,虽然国内外学者积累了大量关于绝缘子污秽试验的经验,但尚未对比研究均匀升压法和恒压升降法的人工试验差异,故笔者利用人工气候室内及交直流试验电源对XZP-300、XWP-300和FXBW-300 3种绝缘子进行污闪试验,以探求这两种试验方式的内部联系。结果表明:交直流污闪试验中,均匀升压法测得的结果较恒压升降法高;用污秽特征指数a的相似度来判定是否可以对两种试验方法的结果进行修正,并建议试验差异η小于10%时可以进行修正;修正后的均匀升压法和恒压升降法获得的电压值基本吻合,且修正系数δm与绝缘子的材料和试验电压类型有关;当η的绝对值大于10%,则不宜进行修正。结论可为研究不同试验方式对绝缘子污闪特性的影响提供参考。Polluted flashover of insulator threats to the safety operation of power system. Although the domestic and foreign scholars accumulated some experience of pollution tests,there is no comparison between the even-raising method and the up and down method. The artificial climate chamber and AC&DC power system are used to complete the contamination flashover tests of XZP-300,XWP-300 and FXBW-300 insulators,the internal connections are investigated too. Results show that voltages tested by the even-raising method are higher than another. The similarity of pollution index a can be used to determine whether we need to correct the results. When the absolute value of η is less than 10%,the results obtained by even-raising method can be revised and the modified values are agree well with the test results obtained by up and down method. As well as the correction factor( δ_m) is related to materials of the insulator and the type of voltage. However,when the value of η is greater than 10%,test result could not be revised. The conclusion can provide reference to explore the polluted flashover characteristics of insulator under different tests method.

关 键 词：绝缘子污闪 恒压升降法 均匀升压法 污秽特征指数 

分 类 号：TM216[一般工业技术—材料科学与工程]