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## Field-to-transmission line coupling models

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Lightning Interaction with Power Systems - Volume 1: Fundamentals and Modelling — Recommend this title to your library

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This chapter presents the coupling of lightning electromagnetic fields to overhead and underground lines based on the transmission line approximation. The chapter starts with an introductory section in which the advantages and the drawbacks of three approaches, namely the quasi-static approach, the transmission line approach, and the antenna approach, are presented and discussed. The conditions of validity of the application of the transmission line approximation and its suitability for the case of lightning generated fields are also presented in that section.

Chapter Contents:

• 6.1 Introduction (TL approximation, QS approximation, and full-wave approach)
• 6.2 Field-to-transmission line coupling models for overhead lines
• 6.2.1 Derivation of the generalized Telegrapher's equations for the model of Taylor et al.
• 6.2.1.1 Derivation of the first generalized Telegrapher's equation
• 6.2.1.2 Derivation of the second generalized Telegrapher's equation
• 6.2.2 Equivalent circuit
• 6.2.3 The model of Agrawal, Price, and Gurbaxani
• 6.2.4 The Rachidi model
• 6.2.5 Rusck/modified Rusck model
• 6.2.6 Finite ground and medium conductivity
• 6.2.7 Multiconductor lines
• 6.2.8 Equivalence of the coupling models
• 6.2.9 Source terms in field-to-transmission line coupling models
• 6.3 Field-to-transmission coupling models for buried cables
• 6.3.1 Preliminary remarks
• 6.3.2 Calculation of the lightning electric field under the ground
• 6.3.3 Coupling to buried cables
• 6.4 Coupling equations in time domain
• 6.5 Experimental validation
• References

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