A Study of Distribution Load Transfer Operation Based on GIS

In this paper, geographic information system (GIS) is applied to perform distribution load transfer operation. It´s important and significant to perform load transfer for improving the service reliability of distribution network and decreasing outage loss. However, distribution load transfer operation was mostly completed by manual work and experience in the past. Several analysis program modules, such as network analysis and connectivity analysis, are adopt to deal with outage of distribution network on the basis of distribution GIS. The power flow is stored in the database as the attributes of line switches for load transfer analysis. When a system outage such as fault and overload occurs, the load transfer is then executed to find the switches to be operated by the reactive Tabu Search (RTS) method while subjected to the system operation rules. By the proposed method, using the program modules, the network topology can be updated according to switches status. Since all the system facilities are stored in the GIS database according to the actual spatial coordinates, it provides practical information for the system operators and crews to allocate and operate switches easily. Finally load transfer scheme will be given including switches operation and theirs sequence. To demonstrate the effectiveness of the integrated GIS system with application programs using reactive Tabu search for distribution operation, an urban distribution system is selected for a case study.