CAJ | 학술논문

利用2007—2010年河北省发生的9次输电线路舞动故障资料和代表气象站的观测资料,分析了输电线路舞动的时空分布特点;从降水、气温、平均相对湿度、风速等方面研究了影响输电线路舞动的气象条件;对导致输电线路舞动的天气过程、环流背景和冷空气路径进行了详细的分析.结果表明:河北省有2个输电线路舞动高发区,分别在蔚县和沽源;输电线路舞动出现在雨、雨夹雪或雨转雪的天气条件下,气温经历(或接近)0℃(最高气温≥0℃、最低气温≤0℃),平均相对湿度≥70%;在平原地区,平均风速≥4 m/s,最大风速≥7 m/s,在山区风速条件较平原低;输电线路舞动前后风速存在短周期的高频变化;输电线路舞动产生在地面等压线密集的区域,舞动区域与冷空气路径有关.
이용2007—2010년하북성발생적9차수전선로무동고장자료화대표기상참적관측자료,분석료수전선로무동적시공분포특점;종강수、기온、평균상대습도、풍속등방면연구료영향수전선로무동적기상조건;대도치수전선로무동적천기과정、배류배경화랭공기로경진행료상세적분석.결과표명:하북성유2개수전선로무동고발구,분별재위현화고원;수전선로무동출현재우、우협설혹우전설적천기조건하,기온경력(혹접근)0℃(최고기온≥0℃、최저기온≤0℃),평균상대습도≥70%;재평원지구,평균풍속≥4 m/s,최대풍속≥7 m/s,재산구풍속조건교평원저;수전선로무동전후풍속존재단주기적고빈변화;수전선로무동산생재지면등압선밀집적구역,무동구역여랭공기로경유관.
Using data of power transmission line galloping (which happened nine times from 2007 to 2010) in Hebei province and observations from representative stations, characteristics of spatial and temporal distribution for line galloping are analyzed. Based on the precipitation, temperature, average relative humidity and wind speed, the associated meteorological condition is studied. The synoptic processes, circulation patterns and cold air paths that lead to line galloping are analyzed in detail. The results are shown as follows. High incidence areas of line galloping are in Yuxian and Guyuan. Line galloping occurs when it is rainy or sleety and the temperature reaches or gets close to 0 ℃(the highest temperature≥0 ℃ and the lowest temperature≤0 ℃) and the average relative humidity≥70%; average wind speed≥4 m/s and maximum wind speed≥7 m/s in plain. Wind speed in mountains is lower than in plains before line galloping, changing at short cycles and high frequencies. Line galloping occurs in the areas of intensive isobars, and is related to the path of cold air.