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On the Lightning Electromagnetic Fields due to Channel with Variable Return Stroke Velocity

机译:关于具有可变回程速度的通道引起的雷电电磁场

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摘要

Numerical field expressions are proposed to evaluate the electromagnetic fields due to the lightning channel with variable values of return stroke velocity. Previous calculation methods generally use an average value for the return stroke velocity along a lightning channel. The proposed method can support different velocity profiles along a lightning channel in addition to the widely used channel-base current functions and also the general form of the engineering current models directly in the time domain without the need to apply any extra conversions. Moreover, a sample of the measured lightning current is used to validate the proposed method while the velocity profile is simulated by the general velocity function. The simulated fields based on constant and variable values of velocity are compared to the corresponding measured fields. The results show that the simulated fields based on the proposed method are in good agreement with the corresponding measured fields.
机译:提出了数值场表达式来评估雷电通道产生的电磁场的返回行程速度值可变。先前的计算方法通常使用沿雷电通道的回程速度的平均值。除了广泛使用的基于通道的电流函数之外,所提出的方法还可以支持沿着雷电通道的不同速度剖面,并且还可以直接在时域中采用工程电流模型的一般形式,而无需进行任何额外的转换。此外,使用测得的雷电流样本来验证所提出的方法,而通过通用速度函数模拟速度分布。将基于速度常数和变量值的模拟场与相应的测量场进行比较。结果表明,基于该方法的模拟场与相应的实测场吻合良好。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第4期|150756.1-150756.9|共9页
  • 作者单位

    Islamic Azad Univ, Firoozkooh Branch, Dept Elect Engn, Firoozkooh 3981838381, Iran.;

    Univ Putra Malaysia, Fac Engn, Ctr Electromagnet & Lightning Protect Res CELP, Serdang 43400, Selangor, Malaysia.;

    Univ Putra Malaysia, Fac Engn, Ctr Electromagnet & Lightning Protect Res CELP, Serdang 43400, Selangor, Malaysia.;

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