This project is initiated by a proposal from Vestas Wind Systems A/S. The main goal is to develop a fast method to evaluate the energy production of different wind turbines (WT) in an off-shore wind farm (WF) connected to a VSC-HVDC line transmission. The proposal also includes the evaluation of a new wind turbine concept based on a V/f controlled Rotor-Current-Controlled Induction Generator. The evaluation method is based on simplified models of the considered machines and controls, which are solved analytically – without derivative or integrative terms and feedbacks. The converter topology proposed by the manufacturer is a two-level three-phase Voltage Source Converter. A first approach of the evaluation method is implemented in MATLAB/Simulink and it is used to evaluate and compare the performance of several WFs configurations (full scale SPMSG, DFIG, RCC-IG and SCIG) in an off-shore VSC-HVDC WF made up of one hundred 2 MW turbines. Aggregated WT models are employed and different wind speed distributions across the WF are considered. Results from this simulation are presented and discussed. It should be emphasized that specific results and conclusions from simulations can vary if WTs with different characteristics are employed or if e.g. the wind speed distribution across the WF varies. So the most important aspect of this report is to develop a proper fast evaluation method.