同走廊单避雷线的研究应用

Study on the Application of the Same Corridor Single Lightning Protection Line

以EGM计算模型为基础,通过考虑同走廊线路避雷线的相互屏蔽作用,修正线路绕击跳闸率,并据此提出同走廊下采用单避雷线的方案。通过分析平行间距对同走廊屏蔽效果的影响,提出保证屏蔽效果下最大平行间距。根据导线参数及最大弧垂,计算了满足电气间隙下的最小平行间距,以验证采用同走廊单避雷线方案的工程应用可行性。

Based on the EGM calculation model,the paper corrects transmission lines shielding failure trip ratio by considering shielding effect of the same corridor line wire,and puts forward the proposal of single ground wire at the same corridor.By analysising the distance between parallel wires to the influence of the shielding effect at the same corridor,the paper proposes the maximum distance between parallel wires which ensures the shielding effect.under meeting the electrical clearance,calculates the minimal distance between parallel wires,in order to verifying the engineering application feasibility of single ground wire at the same corridor.