架空地线直流临界融冰电流影响因素分析  

作　　者：熊继开 程龙 王沐东[1] 楚江平 李嗣 王爽 文中[2,3] 

机构地区：[1]国网湖北超高压公司荆门运维分部,湖北荆门448000 [2]三峡大学电气与新能源学院,湖北宜昌443002 [3]湖北省输电线路工程技术研究中心(三峡大学),湖北宜昌443002

出　　处：《科技创新与应用》2024年第22期62-64,69,共4页Technology Innovation and Application

基　　金：国网湖北超高压公司科技资助项目(B71520230043)。

摘　　要：冰灾是电力系统最为严重的灾害之一,线路覆冰会破坏降低杆塔、金具、导线等部件的机械强度,使输电铁塔加大负重,导致断线、倒塔等事故频繁发生,影响输电线路运行安全稳定性。融冰效率与电流大小有关,电流越大,效率越高。但对于不同的导线,融冰电流也必然受到导线最大允许温度、直流融冰装置容量、线路融冰距离的限制。因此,对于临界融冰电流的计算是进行融冰工程的重要凭据。该文从风速、覆冰厚度、环境温度3个方向通过融冰物理过程及有限元仿真软件分析其与架空地线临界融冰电流的影响关系。从计算结果来看,其中风速与环境温度有着显著影响,而覆冰厚度与临界融冰电流呈近似线性的对应关系。Ice disaster is one of the most serious disasters in power system,line icing will destroy and reduce the mechanical strength of towers,fittings and conductors,increase the load on transmission towers,and lead to frequent accidents such as line breakage and tower collapse,thus affecting the safety and stability of transmission line operation.The ice melting efficiency is related to the current.The higher the current is,the higher the efficiency is.However,for different wires,the ice-melting current must be limited by the maximum allowable temperature of the wire,the capacity of DC ice-melting device and the ice-melting distance of the line.Therefore,the calculation of critical ice-melting current is an important credential for ice-melting engineering.In this paper,the influence of wind speed,ice thickness and ambient temperature on the critical ice melting current of overhead ground wire is analyzed through the physical process of ice melting and finite element simulation software.There is a significant influence between wind speed and ambient temperature,and there is an approximate linear relationship between ice thickness and critical ice melting current.

关 键 词：架空地线 直流融冰 有限元分析 热平衡过程 临界融冰电流 

分 类 号：V445[航空宇航科学与技术—飞行器设计]