| 直流输电线短路电流的瞬态电磁场的分析 |
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| 引用本文： | 邵钟浩,程林强.直流输电线短路电流的瞬态电磁场的分析[J].南京邮电大学学报(自然科学版),1987(3). |
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| 作者姓名： | 邵钟浩 程林强 |
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| 摘 要： | 本文从Maxwell方程出发,导出了大地上方的输电线电磁场在频域中的精确解,并通过简化得到了考虑大地介电系数(即地中位移电流)影响的大地上方电场计算公式。在此基础上,利用积分变换导出了直流输电线对地短路电流在大地上方所建立的瞬态电场表达式,从而得出了通信导线上的瞬时感应纵电动势计算式。最后借助计算机对一些典型条件进行数值计算,得出了相关的曲线和结论。
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| 关 键 词： | 电磁场 输电线路 通信线路 短路电流 |
Analysis of Transient Electromagnetic Fields Porduced by Short-Circuit Current on D.C.Power line |
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| Shao Zhonghao Cheng Linqiang.Analysis of Transient Electromagnetic Fields Porduced by Short-Circuit Current on D.C.Power line[J].Journal of Nanjing University of Posts and Telecommunications,1987(3). |
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| Authors: | Shao Zhonghao Cheng Linqiang |
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| Institution: | Shao Zhonghao Cheng Linqiang |
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| Abstract: | Starting from the Maxwell equations, the exact solutions for electromagnetic field caused by a power line over the earth in frequency domain are derived, and their simplified formulas allowing for the effect of the permittivity of the earth (i.e., the displacement current in the earth) are obtained. On the basis of these formulas, we get the formula for the transient electric field caused by short-circuit current on the power line by using integral transformation. And then we obtain the formula of the transient-induced longitudinal e.m.f on telecommunication line. Finally, with the help of a computer, we carry out numerical calculation under some typical conditions and obtain some related curves and conclusions. |
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| Keywords: | Electromagnetic field Transmission line Telecommunication line Short-circuit current |
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