Wind power generation and transmission system planning: the Italian case

This paper analyzes the impact of a large amount of wind generation on the Italian transmission network. The analysis takes into account the fact that the most suitable sites for installation of wind farms are located mainly in Southern Italy and that the power flows from wind turbines will arise in addition to the existing ones, mainly directed to Central Italy, thus increasing the possibility of network congestions. By means of a procedure of Optimal Power Flow the analysis determines any limitations to the full exploitation of wind generation capacity because of the constraints imposed by the transmission system, especially if not properly reinforced. Moreover, a sensitivity analysis, based on the nodal index Weighted Transmission Loading Relief (WTLR), assesses the impact of wind farms' generation on power system security. In any case the analysis aims at highlighting the need to complete the development plan of the Italian transmission system.