| 架空线路良导体地线的选型和施工弧垂观测档的确定 |
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| 引用本文： | 张晓东.架空线路良导体地线的选型和施工弧垂观测档的确定[J].广东电力,2012(7):114-117. |
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| 作者姓名： | 张晓东 |
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| 作者单位： | 广东惠州电力勘察设计院有限公司,广东惠州,516001 |
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| 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。
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| 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 |
Selection of Ground Wire with Good Conductivity for Overhead Lines and Determination of Sag Observation Span in Construction |
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| ZHANG Xiaodong.Selection of Ground Wire with Good Conductivity for Overhead Lines and Determination of Sag Observation Span in Construction[J].Guangdong Electric Power,2012(7):114-117. |
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| Authors: | ZHANG Xiaodong |
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| Affiliation: | ZHANG Xiaodong (Guangdong Huizhou Electric Power Investigation ＆ Design Institute Co., Ltd, Huizhou, Guangdong 516001, China) |
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| Abstract: | 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. |
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| Keywords: | overhead line ground wire with good conductivity stress atmospheric overvoltage strain section span distance control |
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