A simple method combining Output‐Error (OE) model and Finite‐Difference Time‐Domain (FDTD) method is proposed to reconstruct lightning current in this paper. First, the FDTD method is adopted to calculate electromagnetic fields of any desired point, and the transfer function between the obtained fields and channel base current is built by using OE model. Then, the lightning current is reconstructed by putting the actual measured electromagnetic field into the corresponding transfer function. The validity of the proposed method is demonstrated through the measured data given in the literature. Moreover, three influence factors on the reconstruction performance of this method are analyzed as well, including the effect of distance from field observation point to lightning channel, ground conductivity and the velocity of return stroke.

中文翻译：

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基于输出误差模型和时域有限差分法的雷电电流波形重构

提出了一种将输出误差模型与有限差分时域方法相结合的简单方法来重建雷电流。首先，采用FDTD方法计算任意点的电磁场，并利用OE模型建立得到的场与通道基极电流之间的传递函数。然后，通过将实际测得的电磁场放入相应的传递函数中来重建雷电流。通过文献中给出的实测数据证明了该方法的有效性。此外，还分析了影响该方法重建性能的三个因素，包括从现场观察点到雷电通道的距离，地面电导率和回程速度的影响。