摘要
针对海拔3500 m以上的超高海拔地区,±800 kV特高压直流输电线路设计经验欠缺的问题,按照典型的±800 kV直流输电线路工程设计条件,通过电磁环境、绝缘子串长和V串夹角、空气间隙的边界条件,对直线塔极间距进行研究,计算不同海拔、V串夹角和冰区条件下直线塔的最小极间距取值。结果表明:电磁环境对超高海拔±800 kV特高压直流线路的极间距选择基本无影响;超高海拔轻中冰区直线塔的极间距受空气间隙、绝缘子串长及V串夹角影响较大;超高海拔重冰区直线塔的极间距主要由绝缘子串长控制。
Fof ultra-high altitude areas above 3500 m,the design experience of±800 kV ultra-high voltage direct current(UHVDC)transmission line is insufficient.According to the typical±800 kV UHVDC transmission line design conditions,the polarity distance of suspension tower is studied by considering electromagnetic environment,length of the insulator string,angle of the V style insulator string,air gap.The minimum polarity distance of suspension tower is calculated and analyzed under different altitude,angle of the V style insulator string and icing area conditions.The results show that the electromagnetic environment has little effect on the selection of pole spacing for ultra-high altitude±800 kV ultra-high voltage DC lines.The polarity distance of suspension tower in the light to medium ice area at ultra-high altitude is greatly affected by air gap,length of the insulator string,and angle of the V style insulator string.The polarity distance of suspension towers in ultra-high altitude and heavy ice areas is mainly controlled by the length of insulator strings.
作者
柏晓路
王艳君
崔戎舰
吴墨非
陈媛
吕健双
BAI Xiaolu;WANG Yanjun;CUI Rongjian;WU Mofei;CHEN Yuan;LYU Jianshuang(Central Southern China Electric Power Design Institute Co.,Ltd.of China Power Engineering Consulting Group,Wuhan 430071,China;China Three Gorges University,Yichang 443002,China)
出处
《吉林电力》
2023年第4期52-56,共5页
Jilin Electric Power
关键词
超高海拔
极间距
±800
kV直流输电线路
特高压
ultra high altitude
polarity distance
±800 kV DC transmission line
ultra-high voltage
