Distribution feeder one-line diagrams automatic generation from geographic diagrams based on GIS

Abstract

Geographic information systems (GIS) are computer-based systems designed to support the capture, management, manipulation, analysis, and modeling of spatially referenced data. At present, GIS has been extensively used in the energy management system and provides visualized platform to electrical distribution system analysis, design and operation, that is, AM/FM/GIS. One-line diagrams are widely used to represent the electrical distribution system current state and its facilities connectivity relationship. Once AM/FM/GIS integrate with SCADA, the real time operational data obtained, one-line diagrams could represent electrical distribution system dynamic topological relationship. In the past, one-line diagrams was produced by means of manual working using CAD or more original analogy circuit board, it is inefficient and easily error. Therefore it's significant to implement automatic generation one- line diagram, it can reduce the human errors and the huge effort in a manual generation technique. This paper presents a methodology to automatically build these diagrams based on the usage of geospatial data from AM/FM/GIS. All electrical distribution system facilities including the network buses, branches, switches and transformers were abstracted into edges and nodes. With the aid of the routing methodology in the large scale integration, an intelligent routing algorithm for the power system graph is presented. The intelligent routing algorithm permits the elimination of intersection and overlap of buses and other facilities. The approach was successfully demonstrated with some city district electrical distribution system.