Electric Connectivity Analyzing for 10kV Distribution Network Based on GIS

Power distribution network connectivity analysis is the foundation of various distribution network analyses. As an application of information technology, Geographic Information System (GIS) may support distribution network resource management effectively. In order to analyze intuitively and quickly for power grid based on GIS, a network topology model based on unique identifier code which can be applied to picture linking relation of electrical equipment of distribution network is proposed in this study, and it can be implemented to database easily. Certainly, a technique that a virtual power source point is placed at every outlet of feeder lines of substation is taken to simply the complexity of distribution network in this paper. Switches, bifurcations of lines and junction points of power source points and lines are seen as sides; moreover the line sections divided by switches are regarded as nodes. This treatment method can convert distribution network to graph, meanwhile can reduce the count of graph nodes. The adjacency matrix of nodes is used to support connectivity analysis in this essay. An algorithm which extracts graph data that can be applied to construct adjacency matrix from topology database of GIS is presented clearly in this study. This paper also describes the method that transforms adjacency matrix to connectivity matrix through calculating, as well as to determine the scope of power interruption. Calculation example shows that the network topology model and methods of adjacency matrix formulation and calculation can be used to analyze the network connectivity and the scope of power interruption.