Evaluation of Power Systems Availability using Simplified Methods based on Markov Chains

Methods used to evaluate reliability and availability performance of telecom power systems are described. The models are based on Markov chains in steady-state conditions assuming expotential distributions. The models and methods normally used have been developed further in order to obtain more numerical information on the effects of monitoring systems and operating practices of maintenance staff on power system reliability and availability performance. In addition, a telecom power system is analyzed, and results together with their dependence on various system parameters are discussed.