Grid Faults and Component Failures

  • Liisa Haarla
  • Mikko Koskinen
  • Ritva Hirvonen
  • Pierre-Etienne Labeau
Part of the Power Systems book series (POWSYS)


The Chapter describes grid faults; mainly short circuits and trips of big generators. These common faults or credible events affect system stability and security. The Chapter also discusses component failures, their causes and the calculation of failure rate estimates and unavailabilities. Fault and failure statistics are briefly described, too. The focus in all these subjects is in the grid security and in the substation reliability model: circuit breakers and protection systems.

The chapter describes component failures focusing on the most important components needed in the PSA substation model: circuit breakers, protection relays, and telecommunication channels. The chapter gives some failure and fault statistics. It presents an example of component failure data for the substation model, derived from the Finnish 400 kV component failure statistics.


Circuit Breaker Fault Duration Earth Fault Generator Trip Lightning Stroke 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag London Limited  2011

Authors and Affiliations

  • Liisa Haarla
    • 1
  • Mikko Koskinen
    • 2
  • Ritva Hirvonen
    • 2
  • Pierre-Etienne Labeau
    • 3
  1. 1.Department of Electrical EngineeringAalto University School of Electrical EngineeringAaltoFinland
  2. 2.Fingrid OyjHelsinkiFinland
  3. 3.Université Libre de Bruxelles Service de Métrologie Nucléaire BruxellesBelgium

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