应用有限元法分析覆冰输电线路高频电源除冰方法

Analysis on Transmission Line Icing Elimination Method by High Frequency Source

输电线路在冬季风雪的影响下,覆冰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。目前世界上虽然有许多融冰方法,但效果均不佳。本文所介绍的高频高压激励融冰法是近年来涌现出的一种新的融冰方法。在高频激励下,覆冰会转变为一种有损电介质,从而引起自身发热,而且高频下导体中电流所具有的集肤效应将使焦耳热在导体与覆冰的交界面集中产生。通过调节频率,可以调节上述两种效应的综合发热效果并最终达到稳定发热与均匀脱冰的良好效果。最后,通过仿真计算得出,与传统的短路融冰法相比,高频高压激励融冰法具有更高的融冰效率。

Icing of the transmission line in the winter is an ongoing problem; it could result in widespread power outages and a large number of losses in repairing.While there are many methods of melting ice in the world,but the results were poor.Using the high-frequency and high-voltage excitation to melt ice is a new method which emerged in recent years.Under the high-frequency excitation,ice will be transformed into a loss dielectric so that it could cause self-heating.The skin-effect will occurred in the conductor,which will cause the Joule heat emerged in the interface of conductor and ice.Through adjusting the integrated heat of these two effects by adjusting the frequency,only a stable integrated heat can achieve a good de-icing result.Finally,By the ANSYS simulation,It concludes that melt ice with the high frequency and high voltage excitation is not only a feasible method but only a more efficient method.