Calculating lightning-induced overvoltages in power lines. A comparison of two coupling models
Calculating lightning-induced overvoltages in power lines. A comparison of two coupling models
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DOI：
10.1109/15.305462
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发表时间：
1994-08
影响因子：
2.1
通讯作者：
V. Cooray
中科院分区：
文献类型：
--
作者：
V. Cooray
对电力线雷击过电压估计常用的两种耦合模型进行了比较。第一个模型由Rusck（1957）提出，第二个模型由Agrawal， Price和Gurbaxani（1980）提出。在本文采用的命名法中，第一个模型称为“Rusck模型”，第二个模型称为“波天线模型”。Rusck模型的传输线方程可以写成强迫项为水平电场的形式。结果表明，Rusck模型是不完全的。它考虑了标量势梯度产生的水平电场的部分，而忽略了矢量势的贡献。Rusck模型中的这个缺陷使得它依赖于源。也就是说，只有当产生电磁场的源的空间位置使得矢量势对水平场的贡献为零或可以忽略时，Rusck模型才能给出准确的结果。在这种情况下，拉斯克模型和波天线模型用相同的传输线方程来描述，两种模型的预测结果是一致的。>
A comparison is made between two coupling models frequently used to estimate the lightning-induced overvoltages in power lines. The first model was introduced by Rusck (1957) and the second model by Agrawal, Price, and Gurbaxani (1980). In the nomenclature adopted in this paper, the first model is referred to as the "Rusck model" and the second as the "Wave Antenna Model." The transmission line equations of the Rusck model can be written in such away that the forcing term in the equations is the horizontal electric field. The results show that the Rusck model is incomplete. It takes into account the portion of the horizontal electric field generated by the gradient of the scalar potential but neglects the contribution from the vector potential. This defect in the Rusck model makes it source-dependent. That is, the Rusck model can give accurate results only when the spatial location of the source that generates the electromagnetic field is such that the contribution of the vector potential to the horizontal field is either zero or can be neglected. Under such circumstances the Rusck model and the Wave Antenna Model are described by the same transmission line equations, and the results predicted by the two models are identical. >