输电导线高频激励融冰的临界电流分析  

Analysis of Critical Current for High-frequency Excitation De-icing Transmission Line

作　　者：彭志勇 周羽生[1] 何洋 周可 曾诚 汤赐[1] PENG Zhiyong;ZHOU Yusheng;HE Yang;ZHOU Ke;ZENG Cheng;TANG Ci(College of Electrical Engineering and Information,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410114

出　　处：《高压电器》2021年第5期108-114,共7页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51307009)。

摘　　要：根据输电导线覆冰后高频激励融冰的物理过程,基于传热学理论分析了高频激励融冰的热平衡过程,建立高频激励临界融冰条件的物理数学模型,分析了影响高频激励临界电流的主要因素,应用有限元软件Ansys对临界融冰电流的影响因素进行了仿真分析与验证。分析结果表明:高频激励临界融冰电流与环境温度、风速和覆冰厚度有关,环境温度越低或风速越大高频激励临界融冰电流越大,覆冰厚度对高频激励临界融冰电流影响较小。因此选择适当融冰时机对有效提高高频融冰效率具有重要意义。According to the physical process of high-frequency excitation ice-melting of transmission line after icecoating and on the basis of heat transfer theory,the heat balance process of high frequency excitation is analyzed,the physical and mathematical model for high frequency excitation critical ice-melting condition is set up and the main factor affecting the high frequency excitation critical current is analyzed.The influence factor of the critical ice-melting condition is simulated and verified by the finite element analysis software Ansys.It is shown by the analysis result that the high frequency excitation critical ice-melting current is related to the ambient temperature,wind velocity and ice coating thickness.The lower the ambient temperature is or the higher the wind velocity is,the larger the high frequency excitation critical de-icing current is.The influence of ice coating thickness on the high frequency excitation critical ice-melting current is less.Therefore,choosing the appropriate time to melt the ice is of great significance in improving the efficiency of high-frequency ice-melting.

关 键 词：输电导线 高频激励融冰 有限元分析 临界融冰电流 影响因素 

分 类 号：TM75[电气工程—电力系统及自动化]