交流输电导线覆冰增长及临界防冰电流的试验研究  

Experimental Research on the Icing Accretion and Its Critical Anti-icing Current for Conductors Under AC Condition

作　　者：张志劲[1] 黄海舟[1] 蒋兴良[1] 孙才新[1] 胡建林[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2012年第2期469-475,共7页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501);国家自然科学基金项目(50807056;5021005)~~

摘　　要：输电线路导线覆冰荷载和导线覆冰后舞动产生的荷载均可能引起倒塔或导线断线事故,从而严重威胁电力系统的安全运行。为此在大型多功能人工气候室开展不同型号导线在不同气象条件下覆冰增长和临界防冰电流试验研究,得到不同条件下导线覆冰增长随时间变化的关系曲线,分析影响其覆冰增长和临界防冰电流的因素。研究结果表明运行电流可延缓导线的覆冰增长;同等覆冰条件下,直径小的导线覆冰增长较快;环境温度和风速对导线覆冰增长均有明显影响,且环境温度将决定导线表面的覆冰类型;导线运行电流达到一定值可使其不覆冰且临界防冰电流值与气象参数有关。研究结果可为进一步揭示导线覆冰机理提供参考。The ice load on transmission lines and the load caused by iced conductor galloping can cause tower collapse and conductor breakage accidents,seriously threatening the safe operation of power system.In a large multi-function artificial climate chamber,we experimentally researched the icing growth and critical anti-icing current of different type conductors under different meteorological conditions,and obtained a curve of relationship between icing growth and time under different conditions.Moreover,we analyzed the factors affecting the growth of ice and anti-icing current on transmission lines.The research results show that the running current can reduce the growth rate of ice on conductors.And under the same icing condition,there is a rapid growth of ice on conductor with small diameter.The environmental temperature and wind velocity have a significant effect on ice accretion on transmission lines.And the ambient temperature will determine the type of ice on transmission lines.The conductor may anti-ice when the value of running current is large enough,which depends on the circumstance parameters.The research results can be used to reveal the mechanism of ice accretion on transmission lines.

关 键 词：导线 交流 覆冰 增长过程 温度 风速 防冰 

分 类 号：TM721.2[电气工程—电力系统及自动化] TM755