摘要
同塔双回特高压1 000 kV杆塔上的雷电反击过电压幅值很大程度上受到杆塔模型的影响。为准确计算线路杆塔波阻抗,参阅了国内外学者对杆塔模型的研究,采用集中电感、单波阻抗、多波阻抗3种杆塔模型和波阻抗的9种计算方法,使用电磁暂态分析程序ATP-EMTP搭建雷电反击输电线路的模型,以一种实际运行中的1 000 kV特高压线路为例,计算并分析了杆塔的过电压幅值与不同杆塔模型的适用性。计算结果表明,使用不同杆塔模型计算结果会有所差异。
The tower modules have a great impact on the amplitude of lighting back-strike overvoltage on 1000kV double circuit transmission lines with high tower.In order to calculate the wave impedance on transmission line precisely,this paper refers to domestic and foreign research on tower modules and illustrates three kinds of tower models such as equivalent inductance,surge impendence,multistory transmission tower model & nine kinds of the calculating method for wave impedance.The amplitude of practical lighting back-strike overvoltage on 1000 kV double circuit transmission lines with high tower is calculated and analyzed through the simulation in ATE-EMTP.The result shows that the calculations of the tower models are different.
出处
《电力学报》
2013年第2期104-108,共5页
Journal of Electric Power
