摘要
采用华山气象站1980—2007年的电线积冰观测资料和陕西省95个气象观测站资料,分析了电线积冰厚度与常规气象资料的相关性,并据此推算出各地距地面10m高度上历年标准的电线积冰厚度,用极值Ⅰ型推断30和50年一遇的最大积冰厚度。结合陕西省电力设计院设计经验、陕西省电网运行现状及历史电网冰灾事故调查情况,对陕西省电网冰区进行了初步划分。结果表明:最大积冰厚度与年雾凇日数、年雨凇日数有较好相关性;将全省分为6个积冰区,并分别绘制出全省不同区域30和50年一遇的1:500000积冰分布图。该结果已作为陕西省电力建设中电线积冰厚度设计的重要依据。
Based on wire icing observations at Huashan Meteorological Station from 1980 to 2007 and con- vention observational data at 95 meteorological stations in Shaanxi Province, the correlations of wire icing thickness with convention meteorological data were analyzed. On this basis, we calculated the standard wire icing thickness at 10 m height above the ground level over the years, estimated the extreme wire icing thickness with a recurrence period of 30 years and of 50 years by means of the method of extreme value type I distribution. According to the design experience of the Shaanxi Electric Power Design Institution, the present situation in Shaanxi Province Electric Power System and historical electrical network icing acci- dent investigations, an elementary grid icing division is made. The results are presented as follows, the biggest icing thickness has positive relationships with annual rime days and annual glaze days. Six different regions of wire icing were separated across the province, and wire icing maps of 1 to 500000 scales with a recurrence period of 30 years and of 50 years were drawn. This result has been used as important basis for wire icing thickness design in the Shaanxi Province electric power construction.
出处
《气象》
CSCD
北大核心
2012年第6期733-739,共7页
Meteorological Monthly
基金
陕西省电力公司2009年重点科研项目"陕西省冰区划分研究"资助
关键词
电线积冰
相关分析
电网冰区划分
陕西省
wire icing, correlation analysis, division of grid icing, Shaanxi Province
