Short-circuit Failures Simulation for Evaluation of Structural Reliability of Power Supply Systems

Abstract

The work is dedicated to the application of the sequential reduction method use to evaluate structural reliability of the industrial enterprises power supply systems. The review of publications has shown the lack of attention to these issues. Most researchers are focused on the reliability of electric power systems; probabilistic-statistical approach and the approach from the standpoint of financial and credit policy dominate here. The algorithm of scheme reduction is considered in terms of the most common type of failure - the short-circuit failure. The algorithm includes the following main steps –the identification of scheme elements, which allow selecting a group of elements, the failure of which leads to the failure of the entire group; the grouping of selected elements for which the equivalent reliability indices will be calculated; the convolving of resulting calculation scheme to the selected user and the definition of equivalent values the failure intensity, restoration time, and other reliability indices of interest. The algorithm is illustrated by an example of calculation scheme of the power supply system fragment containing a branch line. The calculations are carried out for the existing industrial enterprise.