Reliability assessment and improvement of digital protective relays

Abdelkader Abdelmoumene (), Hamid Bentarzi, Mahfoud Chafai and Abderrahmane Ouadi
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Abdelkader Abdelmoumene: UMBB University
Hamid Bentarzi: UMBB University
Mahfoud Chafai: UMBB University
Abderrahmane Ouadi: UMBB University

International Journal of System Assurance Engineering and Management, 2016, vol. 7, issue 1, No 8, 62-69

Abstract: Abstract The development of digital protective relays is considered as a real revolution in the field of power system protection. This is due to their wonderful features not available with older relay generations such as: multifunction, compactness, communication…etc. However, many experts have expressed their anxieties about the reliability of this kind of relays. In this paper, an analytical approach allowing the reliability assessment of digital protective relay has been presented. First, the different failure modes (common cause failures) have been discussed. Then, reliability modeling and evaluation has been developed in order to identify the points of weakness in digital relays. Subsequently, the measures that may be taken to prevent CCFs and enhance the reliability has been proposed and analyzed.

Keywords: Digital; Reliability; Protective relay; Power system (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1007/s13198-014-0300-z

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