Smart transmission networks in Europe: the view of REALISEGRID project

Abstract The paper introduces first the key drivers of the present evolution of the electric system and shows how the network is the key element to integrate an increasing amount of renewable generation. Then, the smart grids philosophy is introduced: this concept, initially specifically associated to distribution systems, is more and more related to the transmission grid too. Depending on different factors, transmission grid investments may also address distribution grid issues and be more generally beneficial for the system. The transmission system itself has also to evolve to handle new challenges in a situation in which authorization for new lines is becoming increasingly difficult. Hence, important opportunities are offered by the new transmission technologies. The paper presents a review of the most important of them, showing their degree of maturity. The results shown here are based on some activities of the European FP7 project REALISEGRID ( http://realisegrid.rse-web.itrealisegrid.rse-web.it ).