基于有限元方法的覆冰输电线路高频高压除冰法分析  

Finite Element Analysis on De-Icing Power Transmission Line with 100 kHz High-Voltage Excitation

作　　者：李宁[1] 周羽生[1] 

机构地区：[1]长沙理工大学电气信息工程学院,湖南长沙410114

出　　处：《电网与清洁能源》2011年第2期28-31,共4页Power System and Clean Energy

基　　金：湖南省自然科学基金项目(07JJ3101);湖南省科技计划项目(2007FJ3008)

摘　　要：输电线路在冬季风雪的影响下覆冰是一个一直存在的问题,它可能引发大范围的停电事故以及耗费数目庞大的修复或重建费用。通过施以大约33kV,100kHz的激励引发的覆冰自身的介质损耗,能够对覆冰输电线路进行融冰。如果仅考虑覆冰介质损耗,则由于发热不均匀将引起驻波效应,但如果同时考虑覆冰介质损耗与电流通过导线时集肤效应造成的电阻损耗,就能够通过调节两者的综合效应达到均匀发热的目的。Icing on the transmission line in winter is a persistent problem which can cause widespread power outages and result in a great amount of cost in repairs or rebuilding. De-icing of the affected transmission line can be achieved by applying the 33 kV, 100 kHz excitation to the ice, causing self- heating of the dielectric ice. Meanwhile, the skin-effect occurs in the conductor, causing the Joule heat to emerge in the interface of conductor and ice. We can adjust the integrated heat of these two effects by adjusting the frequency to achieve a good de-icing result.

关 键 词：覆冰线路 集肤效应 介质损耗 高频高压 

分 类 号：F407.61[经济管理—产业经济]