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Study on Tower Models for EHV Transmission Line

机译：超高压输电线路铁塔模型研究

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Lightning outage accident is one of the main factors that threat seriously the safe and reliable operation of power system. So it is very important to establish reasonable transmission tower model and evaluate the impulse response characteristic of lightning wave traveling on the transmission tower properly for determining reliable lightning protection performance. With the help of Electromagnetic Transient Program (EMTP), six 500kV tower models are built. Aiming at one line to one transformer operating mode of 500kV substation, the intruding wave overvoltage under different tower models is calculated. The effect of tower model on intruding overvoltage has been studied. The results show that different tower models can result in great differences to the calculation results. Hence, reasonable selection of the tower model in the calculation of back- strike intruding wave is very important.
机译：雷电事故是严重威胁电力系统安全可靠运行的主要因素之一。因此，建立合理的输电塔模型，正确评估在输电塔上传播的雷电波的脉冲响应特性，对于确定可靠的防雷性能至关重要。借助电磁暂态程序（EMTP），构建了六个500kV塔式模型。针对500kV变电站一线一变的运行模式，计算了不同塔型下的侵入波过电压。研究了塔架模型对侵入式过电压的影响。结果表明，不同的塔架模型可能导致计算结果差异很大。因此，在反冲侵入波计算中合理选择塔架模型非常重要。

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