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Analysis and Countermeasures for Large Area Icing Accident on Power Grid in Northern China
Author(s): 
Pages: 1-4
Year: Issue:  6
Journal: ELECTRICAL EQUIPMENT

Keyword:  电网覆冰冰闪倒塔舞动融冰;
Abstract: 根据2008年初我国电网发生冰灾的事故统计及现场调研情况,文章从气象、地理及电网设施故障等方面总结了造成此次电网覆冰灾害的特点,并进行了原因分析.分析认为绝缘子严重覆冰后爬距大幅减小以及冰中存在的污秽导致了线路频繁冰闪,线路实际覆冰厚度显著超过设计值,荷栽过大引发了倒塔和断线,不均匀覆冰导致了导线舞动以及变电设备损坏.结合电网遭受破坏所反映出的问题,提出应从冰区划分、路径选择、线路设计及改造、冰闪防治、应急运行方式、防冰融冰技术等方面采取防治措施或开展相应研究,以提高电网在极端气候条件下的安全运行水平.
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