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Modelling Guidelines for Overhead Transmission Lines in Lightning Studies

机译：雷电研究中架空输电线路的建模准则

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Several parts of an overhead transmission line have to be included in a model adequate for lightning overvoltage studies: wires (shield wires and phase conductors), towers, footing impedances and insulators. An additional component, the arrester, should be added if the study is aimed at selecting the arrester ratings needed to achieve a better performance of the line. This aspect can be very important since it can affect the model to be used for representing some parts of the line.rnLightning is a physical phenomenon of random nature, and the calculation of the lightning flashover rate must be performed taking into account this aspect, as well as the random behaviour of some line components. Flashover rate calculations can be useful to select the representation of those parts with a random behaviour; e.g. insulator strings. However, this task can be also performed by carrying out parametric studies that will show the effect and importance of some parameters.rnThis paper proposes a methodology for selecting the most adequate model of each part of an overhead transmission line in lightning overvoltage calculations, when using a time-domain simulation tool, e.g. an EMTP-like tool. The document includes a discussion on modelling guidelines proposed to date for representing overhead lines in lightning studies, shows how to use parametric studies to select the representation of each part of a line, and applies the proposed methodology to a test transmission line.
机译：足以进行雷电过电压研究的模型中必须包括高架输电线路的几个部分：电线（屏蔽线和相线），铁塔，地脚阻抗和绝缘子。如果研究旨在选择实现更好的线路性能所需的避雷器额定值，则应增加一个附加组件，即避雷器。这方面可能非常重要，因为它会影响用于表示线路某些部分的模型。闪电是一种随机性质的物理现象，必须考虑到该方面来执行闪电击穿率的计算，因为以及某些线路组件的随机行为。闪络速率计算对于选择具有随机行为的那些零件的表示很有用；例如绝缘子串。但是，也可以通过进行参数研究来完成此任务，该研究将显示某些参数的作用和重要性。rn本文提出了一种方法，用于在使用雷电过电压计算时选择架空输电线路各部分的最适当模型时域仿真工具，例如类似EMTP的工具。该文件包括有关迄今为止为在雷电研究中代表架空线而提出的建模准则的讨论，展示了如何使用参数研究来选择线的每个部分的表示，并将所提出的方法应用于测试传输线。

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