Abstract
Distribution of active and reactive power between consumers raises the problem of participation of each power station in supply of loads and determining flows of power from each generator trough branches of an electric power network. Interest of this problem mainly is chosen by the development of open access market in power systems. In this paper a method is reviewed of determination of settlement factors, which is based on finding the trace in oriented graph, and allows, with the number of cycles equal with the number of generator nodes, determine the part of active power, which flow from each generator through branches of electric network to load node.