Optimization of transmission technology and routes for Pan-European electricity Highways considering spatial aspects

An algorithm to determine optimal transmission routes and to perform technology selection for transmission system expansion is developed and presented in this paper. The aim of the optimization is to minimize investment and installation costs of grid expansion, taking into account spatial properties. The optimization is performed by formulating possible expansion options around a weighted graph and using a modified A* shortest path algorithm to find the optimal solution. The algorithm delivers optimal locations routes and determines the best technology along the route. The algorithm is applied to possible future pan European electricity highways. The implications of different installation areas on transmission routes and total costs are discussed.