Modeling of Protective System Failures to Operate for Reliability Studies at the Power System Level Using Stochastic Point Processes.

This paper present a method for representing protective systems in reliability studies of the power system which condenses at the circuit breakers of the protection zone the effect of protective component failures, protective scheme configuration and preventive maintenance strategies. It combines the modeling of failure and repair processes using stochastic point process theory and a procedure of sequential Monte Carlo to artificially generate the operating sequence of the protective system and for computing the probabilities of failure to operate seen at the circuit breakers. Its main advantage is that it supports the use of time varying failure rates, a feature not offered by the other methods that have been traditionally applied for this task. On the other hand, its main disadvantage is the long computational time required by the simulation. [ABSTRACT FROM AUTHOR]