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首页> 外文会议>Electromagnetic Compatibility, 2002 3rd International Symposium on >Speedy calculation of frequency-dependent impedances of underground power cables
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Speedy calculation of frequency-dependent impedances of underground power cables

机译：快速计算地下电缆的频率相关阻抗

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This paper describes a speedy method for calculation of frequency-dependent series impedances of the underground power cable in a tunnel. These impedances are needed for the analysis of electromagnetic transients and EMC in power systems. A technique based on the fictitious medium concept is used to calculate the magnetic vector potential exactly at several single frequencies in the tunnel, which reduces the solution region inside the poorly conducting earth. The frequency characteristic of power cable is obtained by a very powerful extrapolating approach, i.e. Cauchy method. The extrapolating results are compared with those from the frequency point-by-point matching approach. The method is very time saving because only the low rank frequency derivative information of the power cable impedance is required.
机译：本文介绍了一种快速方法，用于计算隧道中地下电力电缆的频率相关串联阻抗。这些阻抗是分析电力系统中的电磁瞬变和EMC所必需的。使用基于虚拟介质概念的技术来精确计算隧道中几个单个频率处的磁矢量电势，从而减小了导电不良的地球内部的固溶区域。电力电缆的频率特性是通过非常强大的外推方法（即柯西方法）获得的。将外推结果与频率逐点匹配方法的结果进行比较。该方法非常节省时间，因为仅需要电力电缆阻抗的低阶频率导数信息。

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