冰灾天气下架空线路倒塔断线风险评估  

Risk Assessment for Collapse and Breakage of Overhead Transmission Line in Ice Storm

作　　者：孙羽[1] 王秀丽[2] 

机构地区：[1]东北电网有限公司,辽宁沈阳110180 [2]西安交通大学,陕西西安710049

出　　处：《东北电力技术》2013年第11期1-6,共6页Northeast Electric Power Technology

基　　金：国家自然科学基金项目(51277140)

摘　　要：架空线路大规模倒塔断线故障是冰灾天气下电网基础设施受损的主要方面,对其进行可靠性建模与风险评估是制定电网除冰策略、布置电网安全防御系统的重要依据。针对冰灾天气下架空线路的群发性倒塔断线问题,建立了架空线路冰风荷载停运风险的可靠性模型。根据冰灾天气下外部气象信息的恶劣程度,评估电网运行可靠性,及时给出电网的运行风险测度与倒塔断线的经济损失。During ice storms, large-scale towers collapse and lines breakage are the main damage of transmission grid, and load relia- bility modeling and risk evaluation are the basis for making de-icing strategy and deploying security defense system. Aiming at the problem of large-scale towers collapse and lines breakage in ice storms, a wind and ice loading reliability model of transmission line is built. Reliability assessment of power grid is performed, according to the meteorological information during ice storms. Risk measure- ment and economic losses of towers collapse and lines breakage may be obtained timely. Thus engineering investment and the economic cost for the security defense measures all based on the reliability value of power grid.

关 键 词：冰灾天气 架空线路 大规模倒塔断线 可靠性建模 风险评估 经济损失分析 

分 类 号：TM726.3[电气工程—电力系统及自动化]