Study On Building Topologic Map Of Power System Based On GIS

Power system is a complicated network system that covers a wide range of areas. The objects within the system have complicated electric connections to each other. In recent years, with the development of the information technology, it has become an important research topic to describe the various topologic relations in computer system. This paper brings up a new idea to build the topologic map of logic circuit and geographic joint of power network based on general Geographic Information System (GIS), as well as the studies on the related data structures, modeling facilities and key techniques.Geographic information system (GIS) is a new interdisciplinary technology, which combines computer technology, database management system and computer graphic science. With the support of computer software and hardware, GIS can collect, manage, operate, analyze, simulate and display the spatial data and accomplish graphic data processing and analysis. Based on the analysis of spatial data structure of GIS, a series of facility models on the formation of the topologic map specialized in electric power network were proposed in this paper. With the advanced Object Oriented Technology, all electric facilities in the network can be abstracted to the meta-graphic-objects in drawing space and the electric joint points can be defined too. The meta-graphic-object is event driven which facilitate its analysis and application in the future. To ensure the accuracy of drawing, thesolution for tiny deviation in drawing was also given in this paper. Moreover, the constructive process of logistic topological map and the flow of edit are also described in detail. As a result of the introducing of GIS data structure, graphic data and attribute data can be integrated in this logistic topological map of power network.The objects of power network are point, line and area in a certain area, which include both graphic data and attribute data. All the data above construct a geographic information system that has special spatial meaning. The data of power network can be built and updated conveniently by using advanced Global Position System (GPS). The data collected by GPS can not be introduced to GIS directly, they have to undergo some special treatments such as difference correction and reference transformation before they can be input into the GIS database, which will be discussed in detail in this paper.At last, a summary of the study was given and the application and future development of GIS in power system were predicted.