State enumeration technique combined with a labeling bus set approach for reliability evaluation of substation configuration in power systems

The paper presents a network state enumeration technique combined with a labeling bus set approach for reliability evaluation of substation configuration in power systems. The presented method is easy to handle dependent failures, multiple failure modes and multiple states of components. Another merit is that network failure states enumerated are mutually exclusive and therefore avoid complex calculations associated with union and intersections which have to be conducted in the minimum cut set method. The basic procedure of the labeling bus set approach for identifying a network failure state is explained using a substation configuration with protection action and operational switching. An example of a substation layout is given to demonstrate effectiveness of the proposed method.