【摘要】 为深入研究220 kV同塔四回线路绕击耐雷性能,基于充分考虑垂直排列导线间的相互屏蔽问题,建立了适合同塔多回线路的电气几何模型(EGM)计算方法。在考虑工作电压的影响和雷电先导方向的分散性基础上,对比分析了多种击距公式对计算结果的影响。基于暴露投影距离评估了实际杆塔绕击耐雷性能,并与运行经验进行了对比,验证了计算方法的合理性。计算结果表明,地面倾角、杆塔结构等对线路绕击耐雷性能有较大的影响。更多还原

【Abstract】 In order to study the lightning shielding failure performance for 220 kV quadruple circuit transmission lines more deeply and exactly,this paper proposed,considering mutual shielding between any two vertical conductors,the revised electro- geometric model( EGM) calculation method for multi- circuit transmission lines. Taking into account the operating voltage of the system and the dispersion of the lightning leader angle distribution,the paper compared the influence of some striking distance formulas on the calculation results,and evaluated the lightning performance of the actual quadruple circuit tower on the basis of the exposure distance concept,and then made a comparison with operation experience,which verified the rationality of calculation method. The calculation results show that the factors,such as the ground slope angle,tower structure and so on,have a major influence on the lightning performance.更多还原