Reliability Evaluation of Systems with after Fault Switching

A new method is presented for reliability evaluation of power systems where components may be switched-out after faults. The method utilizes the concept of boundary conditions for the computation of the probability and frequency of system failure. The truncated state enumeration method applied traditionally to the analysis of such systems is now replaced by a network approach which does not, in principle, require truncation rules and can be applied to the components having arbitrary continuous probability distribution of time to failure or repair time. Examples are described in the text to demonstrate the application of the proposed method and to compare the results with the approximate calculations.