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首页> 外文期刊>Electric power systems research >An efficient analytical based technique to numerical calculation of extended earth return impedance and admittance of overhead lines
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An efficient analytical based technique to numerical calculation of extended earth return impedance and admittance of overhead lines

机译：一种高效的基于分析的延伸接地返回阻抗数值计算的技术和架空线路的进入

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摘要

This paper describes an efficient numerical integration technique for the extended overhead line earth return impedance and admittance formula. In-appropriate handling of the infinite integral in the formula can lead to erroneous calculated earth-return parameters at extreme frequencies, and a significant increase in computational effort. In this paper, an efficient technique based on an analytical approach is introduced to enforce proper discretization of the extended transmission line equations. Firstly, the line equations are analyzed, and a common cause of improper discretization is identified. Then the equations are further broken down numerically, based on which a procedure to suitably select a discretization interval and step is developed. Validation was conducted by calculating the earth return parameters of overhead-line cases using the proposed method and equal distance discretization. The proposed technique shows accurate results while using fewer discretization points than equal distance discretization.
机译：本文介绍了扩展架空线接地返回阻抗和导纳配方的有效数值积分技术。在公式中的无限整体的适当处理可以导致极端频率的错误计算的接地返回参数，并且计算工作的显着增加。在本文中，引入了基于分析方法的有效技术，以强制扩展传输线方程的适当离散化。首先，分析了线条方程，识别了不正确离散化的常见原因。然后，基于该过程，在数值上进一步分解，基于该过程，该过程适当地选择离散间隔和步骤。通过使用所提出的方法和等于距离离散化计算架空线箱的地球返回参数进行验证。所提出的技术显示了比相同的离散点小于相等的离散化的准确结果。

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