Angelo L’Abbate*, Gianluca Fulli**, Ana R. Ciupuliga***, Madeleine Gibescu***, Wil L. Kling*** 8th International Workshop on Large-Scale Integration of Wind Power into Power Systems as well as on Transmission Networks for Offshore Wind Farms Bremen, Germany, 14-15 Ottobre 2009 * ERSE SPA ** INSTITUTE FOR ENERGY, DG JRC– EC *** TU DELFT The increasing penetration of wind farms at transmission network level in Europe has led to the adoption of guidelines for the connection of wind power plants to the transmission grid in many European countries. Generally, these guidelines are included in the so-called Grid Codes, but they can also be found in national legislations. Grid connection procedures are accompanied by grid connection charges that may include all or a part of the necessary transmission expansion costs. This paper firstly compares the most common technical requirements for wind farm connection to the transmission networks in the European countries. Particular attention is paid to important features, such as: system voltage and frequency operating ranges, active power control, reactive power control, fault-ride-through capabilities and voltage support during grid faults. Then, the wind connection charging methods and policies adopted by the European Union countries are assessed and compared. Index Terms– active power control, grid code requirements, grid connection charges, low voltage ride through capability, reactive power control, transmission grid, wind power.