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Reliability analysis of 11kV distribution feeder: A case study

In a modern society reliable power supply is a basic requirement. The loads in a power system are in an increasing fashion, and the chances of overloading the important feeders remains a challenge to the power system sector. For the reliability of the feeders, analysis has to be frequently done, and suitable measures have to be implemented for the prevention of overloading. This paper discusses the reliability analysis of a critical 11kV feeder with Markov analysis by considering three parameters of the feeder namely the voltage, frequency and the power flow in the feeder. From the analysis of the eight state Markov Model, the availability, unavailability, mean time to failure, mean time to repair and the down time are obtained.