Distance relay reliability enhancement using false trip root cause analysis

Abdelkader Zitouni, Abderrahmane Ouadi, Hamid Bentarzi () and Mahfoud Chafai
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Abdelkader Zitouni: University of M’hamed Bougara
Abderrahmane Ouadi: University of M’hamed Bougara
Hamid Bentarzi: University of M’hamed Bougara
Mahfoud Chafai: University of M’hamed Bougara

International Journal of System Assurance Engineering and Management, 2019, vol. 10, issue 4, No 2, 475-483

Abstract: Abstract A distance relay, which is widely used for protecting a power transmission line as the primary as well as remote backup device, may be affected by the power disturbances such as power swings and post-faults. Consequently, false trips of protection system may be resulted. Root cause analysis based on fault tree analysis has been used to identify disturbances which may lead to false trips. Once the critical root causes have been identified, conventional mitigation measures are used and then, new blocking function and digital filters are proposed to enhance the security of the system. The quantitative analysis of the improved model shows a significant increase in the security which implies an appreciable enhancement of the reliability of the considered protection system.

Keywords: Distance protection; False trip; Dependability; Security; Reliability; Blocking function; Digital filters; RCA; FTA (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s13198-018-0712-2

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