细网格气象特征对青藏高原地区电网安全的影响  

Effect of Meteorological Characteristics on Safety of Power Grid in Qinghai-Tibet Plateau Area

作　　者：王民昆 肖天贵[2] 王超[2] 刘孙俊[2] 高爽 袁宁乐 甘文风 雷学义 张洪 苏博 王赞 WANG Min-kun;XIAO Tian-gui;WANG Chao;LIU Sun-jun;GAO Shuang;YUAN Ning-le;GAN Wen-feng;LEI Xue-yi;ZHANG Hong;SU Bo;WANG Zan(Southwest Branch of National State Grid,Sichuan Chengdu 610095,China;Chengdu University of Information Technology,Sichuan Chengdu 610225,China;Information Communication Branch of National State Grid,Beijing 100761,China)

机构地区：[1]国家电网公司西南分部,四川成都610095 [2]成都信息工程大学,四川成都610225 [3]国家电网公司信息通信分公司,北京100761

出　　处：《西南农业学报》2020年第8期1835-1844,共10页Southwest China Journal of Agricultural Sciences

基　　金：国家电网公司科技项目(SGLNDK00KJJS1700200);国家自然科学基金(91337215,41575066);国家科技支撑计划(2015BAC03B05)。

摘　　要：【目的】本文研究了细网格气象特征对青藏高原地区电网安全的影响。【方法】利用欧洲中期天气预报中心(ECMWF)提供的再分析资料(0.125°×0.125°)对青藏高原地区10年影响电网安全的降水、温度、积雪深度气象要素进行了统计分析。【结果】高原夏季降水量明显高于其他几个季节,山南地区降水量较多,平均每年发生14次极端降水;冬季青藏高原温度急剧下降,拉萨最低温度低至-14℃,昌都地区的温度低于-6℃,这样的低温天气有可能会引起冰冻灾害,有可能出现输电线路的覆冰事故;青藏高原积雪深度的变化趋势呈单峰型,春、冬季节的积雪深度明显高于其他季节,春季,山南部分地区为降雪大值区。夏季、秋季积雪深度明显减小,冬季多雪区范围扩大,山南、林芝都处于降雪大值区,极端降雪事件的频发区。【结论】要重点关注西藏中东部地区春、冬季节的积雪深度特征,预防由于积雪给电网带来的威胁。【Objective】The present paper aimed to study the effect of meteorological characteristics on the safety of power grid in plateau area.【Method】In this paper,the reanalysis data(0.125°×0.125°)provided by ECMWF were analyzed in the plateau area,including precipitation,temperature and snow depth.【Result】The precipitation in summer was obviously higher than the other seasons.There were more precipitation in Shannan area,with an average annual occurrence of 14 extreme precipitation.The temperature of Qinghai-Tibet plateau dropped sharply in winter.The lowest temperature in Lhasa was-14℃,and the temperature in Changdu was below-6℃,such cold weather might cause freezing disasters,and there might be ice cover accidents on transmission lines.The variation trend of snow depth on the Tibetan plateau was single peak and it was obviously higher than other seasons in spring and winter.Shannan was a large snowfall area in spring,and its snow depth decreased obviously in summer and autumn.The snowy area in winter enlarged,both Shannan and Linzhi were in the high snowfall area,and the frequency of extreme snowfall events was high.【Conclusion】We should focus on the characteristics of snow depth in spring and winter in central and Eastern Tibet to prevent the threat to the power grid caused by snow.

关 键 词：青藏高原 降水 温度 积雪深度 电网安全 

分 类 号：S161[农业科学—农业气象学]