摘要
提出山区大跨越段的220 kV定型双回直线塔塔头尺寸应优化设计,将V形串应用到双回直线塔(最大使用档距650 m)的上导线,塔头处避雷线对上导线的保护角可减少9.88,°档距中央避雷线对上导线的保护角可减少13.3,°从而有效降低绕击率。V形串单支复合绝缘子可比常规长300 mm,根据不平衡绝缘原理减少线路型氧化锌避雷器的安装数量。
Puts forward that 220 kV double circuit tangent tower must be optimum designed on big across of mountainous region, the ＂V＂ string being installed upper conductor on double circuit tangent tower （max span is 650 m）, the upper conductor protected angle may reduce 9.88°on tower, and reduce 13.3°between span center. The length of composite insulator on ＂V＂ string may be more 300 mm than common composite insulator, therefore reduce back strike probability of upper conductor; according to unbalanced insulation principle, may reduce the installed amount of line surge arrester,
出处
《中国电力》
CSCD
北大核心
2006年第4期29-33,共5页
Electric Power
