摘要
目前的设计规程没有对输电线路导线与良导体地线配合的地线选型作出规定,为此从理论上阐述了在大气过电压(无风、无冰、+15℃)条件下导线与地线的电气距离计算方法,同时提出按耐张方式挂线时良导体地线应力的求解方法和弧垂观测档的确定方法。实践证明所提计算方法使良导体地线既能满足工程防雷设计要求,又符合结构强度的选型要求。
Selection of ground wire combining transmission lines and ground wire with good conductivity is absent in current design specification. Therefore, the paper theoretically expounds calculation method for electrical distance between wire and ground wire in case of atmospheric overvoltage （free of wind and ice, temperature -＋ 15~C ） . In the meantime, solution to ground wire stringing under tension and determination method of sag observation span are proposed. It is practically proved that the method can enable ground wire with good conductivity to meet engineering design requirements on both lightning protection and selection of structural strength.
出处
《广东电力》
2012年第7期114-117,共4页
Guangdong Electric Power
关键词
架空线路
良导体地线
应力
大气过电压
耐张段
控制档距
overhead line
ground wire with good conductivity
stress
atmospheric overvoltage
strain section
span distance control
