Title :
A Heuristic Algorithm for System Failure Frequency
Author :
Gadani, J.P. ; Misra, K.B.
Author_Institution :
Researcher; Department of Electrical Engineering; University of Roorkee; Roorkee 24672 INDIA.
Abstract :
For reliability analysis, the choice between tie-sets and cut-sets is not a matter of convenience but depends on assessment of computational effort. The system configuration alone determines the preference of the approach. The present paper offers a faster algorithm for evaluating system failure frequency using both approaches. An expression for system failure frequency between two specified nodes is derived using either tie-sets or cut-sets. The expression is in terms of failure frequency, availability, and unavailability of the system elements. A heuristic algorithm to obtain the expression can be programmed for a computer. The algorithm is illustrated through an example. The manner in which Abraham´s algorithm can be used to determine system probability of failure using cut-sets is suggested. The algorithms are also useful for evaluating sensitivity coefficients.
Keywords :
Availability; Boolean algebra; Bridges; Frequency; Heuristic algorithms; Maintenance; Power system reliability; Redundancy; Steady-state; Disjoint product terms; Failure-frequency algorithm; Probability-of-failure algorithm; Sensitivity coefficients; System failure frequency;
Journal_Title :
Reliability, IEEE Transactions on
DOI :
10.1109/TR.1981.5221113