【摘要】 为准确评价同塔多回线路高度较高杆塔的雷电性能以计算各横担上的电位,给出了同塔多回线路杆塔分段传输线模型,杆塔不同部位用不同波阻抗和不同视在波速模拟。EMTP实例仿真结果表明雷击杆塔后各横担上电位差值小于系统电压峰值,系统电压的相角将会决定闪络的相别,较精确地反映了同塔多回线路杆塔中雷电波传播的暂态过程。这是集中电感或单一波阻抗模型无法模拟的。更多还原

【Abstract】 A distributed line tower model of multi-circuit transmission line is constructed;different part of towers are modeled by different surge impedance and different wave velocity.EMTP simulation results by the distributed line tower model show that the voltage between adjacent cross arms is lower than the peak value of system voltage,and the phase angle of system voltage can determine the phase of flashover,which can not be simulated by the lumped inductance model or single surge impedance model.The distributed line tower model is precisely applied to the multi-circuit transmission line tower.更多还原