The issues of construction and analysis of the topological model in reliability analysis of main electric schemes connections in power plants and substations are considered in this article. The multi-matrix method for reliability analysis is proposed in this article for different electric schemes: two operating systems of built-up wires and one bypass system of built-up wires; two operating systems of built-up wires; one operating system of built-up wires and one bypass system of built-up wires by the obtaining multi-states. The main conclusions were made on the further direction of research.

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