试验方式对瓷和玻璃绝缘子交流污闪特性的影响  

Effect of Test Methods on AC Pollution Flashover Performance of Porcelain and Glass Insulators

作　　者：张鑫[1] 蒋兴良[1] 张志劲[1] 胡建林[1] 肖代波[1] 

机构地区：[1]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》2009年第11期2674-2679,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724503)~~

摘　　要：人工污秽试验是研究污闪特性的重要手段,IEC及我国标准推荐了多种人工污秽试验方法以进行绝缘子闪络特性的试验研究,并提出了几种不同的试验方式,目前常用的有均匀升压法、50%耐受电压法和最大耐受法,但对于不同试验方式下绝缘子污闪特性的差异仍需进行系统研究和比较。为了研究不同试验方式下绝缘子污闪特性的差异,以两种典型的瓷(XP-160)和玻璃(LXY4-160)绝缘子为例,在人工雾室中对3种不同试验方式下绝缘子污闪特性进行了分析和比较。试验结果表明:不同试验方式下绝缘子的闪络特性有一定的差异。不同污秽程度下,均匀升压法得到的污闪电压Uav比50%耐受电压法得到的污闪电压U50%升高了4.27%～12.62%,U50%比最大耐受电压法得到的污闪电压Uws升高了3.94%～13.20%。随着污秽程度的增大,Uav相对U50%提高的百分比和U50%相对于Uws提高的百分比均逐渐增大。The artificial pollution test is an important method for studying pollution flashover performance. Some different artificial pollution methods are adopted to study the pollution flashover performance in IEC and correlative standards, and several different manners of test are compared. The methods of uniform increase voltage, 50 % with- stand voltage and maximum withstand voltage are commonly used, but the difference among them are not comparatively studied. Taking two types of typical porcelain（ XP-160 ） and glass （ LXY4-160） standard insulators as examples, in order to study differences of insulator flashover performance under different manners, the AC pollution flashover performance of insulators under three different manners of test in the climate chamber was analyzed and compared. The test results show that there are some differences in the pollution flashover performance under different manners. Under different pollution degrees, the pollution flashover voltage of uniform increase voltage （Uav） is 4.27% to 12.62% higher than 50% withstand voltage （U50% ）, U50% is 3.94% to 13.20% higher than maximum withstand voltage（Uws ）. Along with the increase of pollution degree, the increase percentage of Uav in comparison with U50% and U50.% in comparison with Uws are gradually enlarged.

关 键 词：污秽试验 人工污秽 污秽绝缘子 试验方式 污闪特性 闪络电压 污秽程度 

分 类 号：TM216[一般工业技术—材料科学与工程]