铝管雨凇冰柱尖端电场分布模型研究  

Research on the Model of Glaze Icicle Apex Electrical Field Distribution on Surface of Aluminum Pipe

作　　者：范晓雨 蒋兴良[2] 陈吉[2] 赵世华[2] 张满[2] 

机构地区：[1]重庆市市区电力局,重庆400015 [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：《电瓷避雷器》2013年第4期44-48,共5页Insulators and Surge Arresters

基　　金：国家重点基础研究发展计划(973计划2009CB724502;2009CB724501);国家重点实验室项目(编号2007DA10512708101;2007DA10512708102)

摘　　要：雨凇是影响输电线路安全运行最严重的冰雪灾害，覆冰后的铝管表面产生并排的冰柱从而改变导线原有形态，冰柱尖端将使得铝管表面电场发生严重畸变，进而增大表面场强；为研究冰柱形态对铝管表面场强的影响规律．在低温低气压试验室内测量不同覆冰程度后的冰柱形态参数．并建立其相应的电场分布模型，再利用有限元法对其尖端场强进行计算，结果表明：雨凇冰柱尖端将严重增大铝管表面场强．随着覆冰程度的增加．覆冰15-30min内由于冰柱生长较快故导致表面场强增加较快．45～60min内由于冰柱增长速度变慢故表面场强增长速度也变慢：可为雨凇覆冰地区输电线路选型及设计提供理论参考。Glaze icing is the most serious disaster which can impact the security operation of transmission line. On the aluminum pipe the glaze will grow some icicles side by side which can change the original conductor shape and the icicle tips will distort the electrical field seriously around the aluminum pipe, thus increasing the field strength on the surface. For the study of the influence of aluminum pipes＇ surface field strength by glaze icicles form, the glaze icicle parameters with the different ice-coating extent are measured in the lower temperature and pressure artificial chamber so as to establish corresponding electric field distribution model and the finite element method is used to calculate the electric field on the icicle tip. The results show that the glaze icicle tip will increase the field strength on the tube significantly, with the increasing level of icing cover, field density increasing rapidly as a result of the glaze icicle grows faster in 15-30 minutes, but in 45-60 rain the icicle grow slower than before will make the field strength raise slower too. The conclusion of this paper can provide theoretical reference for transmission line design and selection in glaze icing region.

关 键 词：铝管 雨凇覆冰 电场分布 有限元法 

分 类 号：TM75[电气工程—电力系统及自动化]