高压输电线路热力融冰影响因素的分析  

Analysis of influencing factors of thermal de-icing of high-voltage transmission line

作　　者：张暕 何青[1] 蓝澜[1] 赵晓彤[2] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]中国电力科学研究院电力系统研究所,北京100192

出　　处：《中南大学学报（自然科学版）》2013年第S1期449-455,共7页Journal of Central South University:Science and Technology

摘　　要：运用传热学理论分析高压输电线路直流融冰的传热过程,包括导线与覆冰的热传递,覆冰与空气接触面间的热交换以及影响临界融冰电流和融冰时间的因素主要等。研究表明:覆冰厚度的增大、风速的增加、环境温度的降低以及融冰电流的减小都会导致融冰时间的增加,同时风速的增加、环境温度的降低也会使融冰的临界电流增大。Icing of high-voltage transmission line is one of the most serious problems to power grid.The heat transfer process of DC de-icing of transmission line including the heat transfer between the wire and the ice,and the heat exchange of the ice surface and the air,as well as the influencing factors of critical de-icing current and de-icing time based on heat transfer theory,was analyzed.The analysis results show that the de-icing time becomes long as the icing thickness and the wind speed increase,and the air temperature and the de-icing current decrease.On the other hand,the critical de-icing current increases as the wind speed increasing,the air temperature and the wire diameter decreasing.

关 键 词：输电线路 覆冰 电热融冰 临界的融冰电流 融冰时间 

分 类 号：TM75[电气工程—电力系统及自动化]