复合绝缘子雾凇覆冰特性与伞形结构优化研究  

The rime icing characteristics of composite insulator and the optimization of shed configuration

作　　者：潘杨 PAN Yang(Power China Henan Electric Power Survey&Design Institute Corporation Limited,Zhengzhou 450007 China)

机构地区：[1]中国电建集团河南省电力勘测设计院有限公司,河南郑州450007

出　　处：《电气应用》2022年第8期1-6,I0004,共7页Electrotechnical Application

摘　　要：复合绝缘子覆冰特性受伞形结构影响较大。为研究复合绝缘子自然雾凇覆冰特性,揭示伞形结构差异对覆冰的影响规律,选取8种220 kV复合绝缘子在湖南雪峰山自然覆冰试验站进行试验。试验结果显示:复合绝缘子迎风面两侧边缘冰厚明显大于中部,增速先快后慢;迎风侧冰棱长度在覆冰初期一段时间后增长速度有所减缓,之后再次加快,后期再次变慢并有饱和趋势;背风面冰厚小于迎风面,增速随时间减缓,在试验后期趋于饱和。通过试验和分析,针对雾凇覆冰地区复合绝缘子伞形结构优化给出以下建议:在允许的范围内适当增大伞裙的倾斜角度;相邻伞裙的间距应大于40 mm,同时大伞之间可分布若干中小伞径伞裙,个数宜在3个以上;大中小伞伞下不宜有棱,伞径可分别取250 mm、150 mm和90 mm,排列方式以“大-小-中-小-中-小-大”为宜。The sheds structure of composite insulators is the important factor that affect icing process and icing flashover voltage.In order to study the icing characteristics of rime and the influence of shed structure on the icing process,the icing tests of 8 composite insulators with different shed structures were carried out at Xuefengshan natural icing test station.The results are as follows:the ice on windward edge is thicker than the middle part;the length of ice ridges on the windward side grows more slowly soon after the icing starts,then begins to accelerate for a period of time,then slows down again at the later stage and has a tendency to saturation.The ice on the leeward side is obviously thinner than that on the windward side,its growth rate shows a trend of first fast and then slow,and the thickness tends to be saturated.The thickest icing area of composite insulator is the edge of windward surface.The structural optimization design suggestions of composite insulator umbrella skirt in rime icing area are given:appropriately increase the top surface inclination;shed distance should be more than 40mm,and there should be more than three middle or small sheds between the adjacent large sheds;there shouldn’t be any edge under large,middle or small sheds,their diameters prefer to be 250/150/90 mm,and the arrangement can be“largesmall-middle-small-middle-small-large”.

关 键 词：复合绝缘子 雾凇 覆冰特性 伞形结构 优化 

分 类 号：TM216[一般工业技术—材料科学与工程]