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Distance relay reliability enhancement using false trip root cause analysis

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International Journal of System Assurance Engineering and Management Aims and scope Submit manuscript

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.

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Abbreviations

CT:

Current transformer

D:

Dependability

PDT:

Probability of occurrence of disturbances leading to tripping

PF:

Post fault

Pft :

False trips causes’ probability

PS:

Power swing

PSB:

Power swing block

Pun:

Probability of occurrence of disturbances leading to unnecessary tripping

R:

Reliability

RS:

Relay system

S:

Security

Sn :

New security

Se :

Existing security

Nc :

Number of corrected trips

Nd :

Number of desired trips

Ne :

Total number of events of disturbances

Nf :

Number of failures to operate

Ni :

Number of incorrect trips (false trip)

Nt :

Total number of trips

UP:

Unknown Phenomenon

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Authors and Affiliations

  1. Laboratory of Signals and Systems (LSS), IGEE, University of M’hamed Bougara, Boumerdes, Algeria

    Abdelkader Zitouni, Abderrahmane Ouadi, Hamid Bentarzi & Mahfoud Chafai

Authors
  1. Abdelkader Zitouni
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  2. Abderrahmane Ouadi
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  3. Hamid Bentarzi
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  4. Mahfoud Chafai
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Corresponding author

Correspondence to Hamid Bentarzi.

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Zitouni, A., Ouadi, A., Bentarzi, H. et al. Distance relay reliability enhancement using false trip root cause analysis. Int J Syst Assur Eng Manag 10, 475–483 (2019). https://doi.org/10.1007/s13198-018-0712-2

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  • DOI: https://doi.org/10.1007/s13198-018-0712-2

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