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Quantitative assessment of protection system reliability incorporating human errors

Etemadi, A. H ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1243/1748006XJRR107
  3. Publisher: 2008
  4. Abstract:
  5. The protection system plays a vital role in maintaining a high degree of service reliability in present-day power systems. Considerable work has been done to examine different aspects of protection systems and their associated reliability. All of the reliability predictive methods are based solely on equipment failures, neglecting the human component of the protection system. In this paper, a modified Markov model is presented that incorporates human errors in reliability evaluation of protective devices. Two main types of relay failure (failure to operate and inadvertent operation) are taken into account in the proposed model. The model also considers routine test inspections, the self-checking facility of digital relays, and also common cause failures of protective devices and protected components. Numerical studies show the influence of human errors on protection system reliability. © 2008, Institution of Mechanical Engineers. All rights reserved
  6. Keywords:
  7. Self-checking ; Reliability ; Human errors ; Routine test ; Protection system
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part O: Journal of Risk and Reliability ; Volume 222, Issue 2 , 2008 , Pages 255-263 ; 1748006X (ISSN)
  9. URL: https://journals.sagepub.com/doi/abs/10.1243/1748006xjrr107