基于钢芯制热导线的实时在线融冰技术  

Real-time Online Melting Technology Based on Steel Core Heating Cable

作　　者：李仁杰 曾成碧[1] 莫思特[1] 苗虹[1] 王勇[1] 查云峰 LI Ren-jie;ZENG Cheng-bi;MO Si-te;MIAO Hong;WANG Yong;ZHA Yun-feng(School of Electrical Engineering,Sichuan University,Chengdu 610065.China)

机构地区：[1]四川大学电气工程学院,四川成都610065

出　　处：《水电能源科学》2021年第2期146-149,141,共5页Water Resources and Power

基　　金：国家电网公司总部科技项目(5200-201999363A);国网湖南防灾减灾中心国家重点实验室开放基金项目(SGHNFZ00FZCSJS1800092)。

摘　　要：为消除电网输电线路覆冰灾害,提出了一种基于钢芯制热导线的实时在线融冰技术,通过在钢芯与铝绞线之间加入一层绝缘层设计出了一种新型复合导线。为验证这一技术的可行性,先运用有限元分析软件ANSYS Workbench仿真了通过80A电流时复合导线铝绞线温度随时间的变化情况,仿真结果表明复合导线铝绞线温度快速达到0℃以上,能够满足融冰需求;最后制作了试验样品进行试验验证,在近似恒温条件下,研究了25mm覆冰的融化过程,获得了电流大小、环境温度及覆冰重量对融冰时间变化的影响,未考虑重力作用影响计算所得融冰时间与实际融冰时间存在一定差异,但总体时间变化趋势一致。该试验可为研究覆冰导线实时在线融冰提供参考依据。In order to eliminate the ice-covering hazard of power grid transmission lines,a real-time online ice-melting technology was proposed based on steel core heating wire.A new type of composite wire was designed by adding an insulating layer between the steel core and the aluminum strand wire.In order to verify the feasibility of this technology,the finite element analysis software ANSYS Workbench was used to simulate the change of the temperature of the aluminum strand of the composite conductor over time when the current of 80 A was passed through.The simulation results show that the temperature of the aluminum strand of the composite conductor reached more than 0℃ quickly and could meet the requirements of melting ice.The samples were made for experiment.Under the condition of approximate constant temperature,25 mm ice melting process was studied to determine the impact of the current size,environment temperature and ice weight on the change of ice melting time.Without consideration of the gravity effect,there exists a certain difference of the calculated value and the actual ice melting time,but the overall time change tendency is the same.This experiment can provide reference for the study of real-time online melting of ice-covered conductors.

关 键 词：实时在线融冰 新型复合导线 有限元分析 融冰时间 

分 类 号：TM752[电气工程—电力系统及自动化]