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输电线路杆塔模型研究现状及雷电反击过电压计算

, PP. 81-86

Keywords: 防雷保护,输电线路,杆塔,波阻抗模型,ATP/EMTP

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Abstract:

介绍了目前常用的集中电感模型、单一波阻抗模型、多波阻抗模型等输电线路杆塔模型。在理论分析的基础之上,结合500kV双回输电线路杆塔在ATP/EMTP程序中建立了集中电感、单一波阻抗、无损多波阻抗和有损多波阻抗等4种杆塔模型。通过雷电反击过电压波形及过电压幅值和时间关系给出了一般性结论,即电感模型过电压值比较大,达到最大过电压的时间较短;波阻抗模型在模拟雷电过电压计算中,更接近实际情况;无损多波阻抗模型由于有具体的计算公式,相对于需要测量波阻抗的有损多波阻抗模型来讲,在分析中具有可操作性强,方便计算等优势。

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