Abstract: In standard reliability theory, this probabilistic perspective has been generally used to model and analyse the reliability of a product/service. Reliability related measures such as availability, mean time to failure, importance measures, etc. are also based on such probabilistic perspective. When considering electric power system reliability, researchers and analysts are interested in how component outages and repair rates affect the associated overall system rates. Primary interest is devoted to the quantification of system failures; this quantification is then translated to expected system outage rates, mean outage duration and overall downtime. Protective relaying suffers from two types of failures: failure to operate, and unwanted operation. Protection system failures can have significant effect on the continuity of electricity supply to customers, making its reliability evaluation a priceless task. When protection system does not perform its intended operation, catastrophic failures can occur which leads to significant amount of customer interruptions and in some cases isolation of the power system. A well-designed protection system responds to the predefined abnormal conditions in an expected time delay without causing other backup systems to react and probably disconnect healthy neighbour components from the circuit. In the work presented, nine state Markov Model is used for the analysis unavailability probability.
Keywords: Reliability, Catastrophic Failure, Repaired rates, Mean time to failure, Markov model.
Title: COMPONENT AND PROTECTION FAILURE EFFECTS ON RELIABILITY ANALYSIS
Author: Rajeev Kumar, Neha Verma
International Journal of Electrical and Electronics Research
ISSN 2348-6988 (online)
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