2010 International Symposium on Power Electronics Electrical Drives Automation and Motion (SPEEDAM) // 09 August 2010 This paper describes an innovative Medium Voltage Direct Current electrical grid system (MVDC) for wind farms, based on transformer-less wind turbines, equipped with modular, multilevel converter (M2LC). A comparison between this MVDC system and a traditional MVAC one has… Continua a leggere MVDC connection of offshore wind farms to the transmission system