National conference on power electronics and power systems 2008: Simulation of transient for power transmission lines

Type :

Term papers

Pages :

6 pages

Format :

.pdf

Published date :

06/09/2009

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Table of Contents National conference on power electronics and power systems 2008: Simulation of transient for power transmission lines Table of Contents

 
  1. Abstract
  2. Introduction
  3. An overview of 'national conference on power electronics and power systems 2008'
  4. Origin of transient in power system
    1. Travellig waves phenomenon in analysis of transmission lines
    2. The effect of short lenght of cable transmission line
    3. Closing of reisistors for EHV lines
  5. Conclusion
  6. References

Abstract

Switching operations, faults, lightning surges, and other intended or unintended disturbances cause temporary high voltages and currents in power transmission lines. The system must withstand this high voltage with a certain probability or its effects must be reduced and limited with protective devices. The simulation of transient phenomena is therefore important for coordination of the insulation as well as the proper design of the protection schemes. Such simulation is also needed to analyze unexpected transient phenomena after their occurrence.. By nature these phenomena are combinations of traveling wave effects on overhead lines and cables, and of oscillations of lumped circuits of generators, transformers and other devices. It is practically impossible to study these electromagnetic transients using hand calculations except for very simple cases. This complexity led to the simulation of transients using computer. Keywords: Pspice simulation, Telegrapher's equation transient, Travelling Waves.

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