Determination of transient overvoltages during shunt reactor deenergization

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6 Scopus citations

Abstract

This paper presents an analytical solution and computer simulations of switching transient overvoltages during the disconnection of shunt reactors. The interruption of reactor current provokes excessive overvoltages particularly across the reactor and the circuit breaker grading capacitor. The magnitude of these overvoltages may exceed 2 p.u. which, consequently, may jeopardise the insulation of the reactor and accelerate the ageing of circuit breaker grading capacitors. In this work, the transient overvoltages were computed using ATP/EMTP simulations and analytical solution of the equivalent circuit during switching. For different switching times the distribution of overvoltages and the influence of switching angle is presented.

Original languageBritish English
Title of host publicationProceedings of the 44th International Universities Power Engineering Conference, UPEC2009
StatePublished - 2009
Event44th International Universities Power Engineering Conference, UPEC2009 - Glasgow, United Kingdom
Duration: 1 Sep 20094 Sep 2009

Publication series

NameProceedings of the Universities Power Engineering Conference

Conference

Conference44th International Universities Power Engineering Conference, UPEC2009
Country/TerritoryUnited Kingdom
CityGlasgow
Period1/09/094/09/09

Keywords

  • Analytical solution
  • ATP/EMTP
  • Chopping overvoltage
  • Grading capacitor
  • Recovery overvoltage
  • Shunt reactor
  • Switching operations

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