Reliability Analysis and Maintenance Optimization of Protective Relays Using an Improved Markov Model

Routine tests in a preventive maintenance plan detect hidden failures and prevent mal-functions. The use of probabilistic models based on Markov chains is conventional in the reliability studies. The well-known models include both states of power system and protection system. This technique increase...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2024-10, Vol.39 (5), p.2997-3000
Main Authors: Zarei, Sajjad, Toulabi, Mohammadreza, Zarei, Mohammad, Kazemi, Mostafa
Format: Article
Language:English
Subjects:
Cost analysis
Costs
Maintenance costs
Markov chains
Markov model
Markov processes
Numerical models
numerical protective relays
Optimization
Power system reliability
Preventive maintenance
preventive maintenance (PM)
Probabilistic models
Protection
Protection systems
Protective relaying
Reliability analysis
routine test interval
State-of-the-art reviews
System reliability
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Description
Summary:Routine tests in a preventive maintenance plan detect hidden failures and prevent mal-functions. The use of probabilistic models based on Markov chains is conventional in the reliability studies. The well-known models include both states of power system and protection system. This technique increases the complexity of model and study. In this letter, a state-of-the-art Markov model for analysis of the protective relays' reliability is assessed and an improved model is proposed. The power system states are removed from the model and instead the interactions of two systems are considered in the transition rates and costs. The proposed probabilistic model of numerical relays is used to optimize the cost of maintenance considering the back-up protection and uncertainties.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2024.3424148