Modelling of power transmission line components

Modelling of power transmission line components

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The aim of this chapter is to present and discuss models of power transmission line components for the calculation of lightning overvoltages on transmission lines due to direct lightning strikes. The models presented in this chapter are based on lumped- and distributed-circuit theory.

Chapter Contents:

  • 9.1 Transmission lines
  • 9.1.1 Transmission line equations
  • 9.1.2 Calculation of per-unit-length parameters
  • General formulation
  • Reducing conductor bundles to a single equivalent conductor
  • 9.1.3 Frequency-domain solution of the transmission line equations
  • 9.1.4 Time-domain solution of the transmission line equations
  • 9.2 Transmission towers
  • 9.2.1 Overview
  • 9.2.2 Travelling wave analysis of a lightning strike to a tower
  • 9.2.3 Tower models
  • Geometric tower models
  • Non-uniform transmission line models
  • Propagation speed
  • 9.2.4 Example
  • 9.2.5 Discussion
  • 9.3 Grounding
  • 9.3.1 Overview
  • 9.3.2 Lumped-circuit representation
  • 9.3.3 Distributed-circuit representation
  • Cascade of lumped-circuit elements
  • Transmission line model
  • 9.3.4 N-port linear circuit model based on rational approximations
  • 9.4 Insulator strings
  • 9.4.1 Introduction
  • 9.4.2 Flashover models
  • Voltage-dependent switch
  • Voltage–time curve
  • DE model
  • Leader progression model
  • 9.4.3 Final remarks
  • 9.5 Surge arresters
  • 9.5.1 Introduction
  • 9.5.2 Conventional model
  • 9.5.3 IEEE model
  • 9.5.4 Pinceti–Giannettoni model
  • 9.6 Summary
  • References

Inspec keywords: lightning protection; power transmission lines; overvoltage

Other keywords: distributed-circuit theory; transmission lines; direct lightning strikes; lumped-circuit theory; lightning overvoltages; power transmission line components

Subjects: Power transmission lines and cables

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