Optimal planning of substation for distribution system based on geographical property analysis

This paper presents a new approach for substation planning. As more influences of substation on people, society and environment have been concerned, substation planning must be carried out according to the corresponding factors, besides economic cost. Geographical property of substation site is introduced in the consideration, which is denoted to the relationship of the site and its social, economic and environmental benefits, and evaluation system of the geographical property is constructed to form geographical cost factor. By integrating geographical cost factor into cost function, the new model has the selectivity when deciding the optimal sites. In other words, the sites must be located in feasible area. It is proved by engineering cases that the model could not only consider social and environmental factor, but also ensure economy of the planning scheme.