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This paper proposes a novel reliability modeling and analysis methodology for modern substation protection systems. A typical IEC 61850 based substation protection system is designed and analyzed using this methodology as an example. This system includes cyber components such as Merging Units (MUs), Intelligent Electronic Devices (IEDs), and process bus, as well as physical components such as transformers,...
Catastrophic failures of circuit breakers result in high cost associated with loss of load and component replacement. The probability of such failures can be reduced using maintenance procedures. Probabilistic models are needed to estimate failure rate, perform cost benefit analysis and arrive at an optimal maintenance strategy that balances the cost of maintenance with reduction in cost of failures...
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