This research project is part of the Belgian PhairywinD project, which aims to develop the current and the future offshore wind farms in a multi-disciplinary framework. The ability to participate in the frequency regulation and provide ancillary services to the TSO (Transmission System Operator) is one of the present offshore wind farm challenges. The goal of this research is to further investigate how wind farms can achieve this goal at best by taking into account wake effects, load mitigation and active power reserve in the dispatching of the active power set points to the turbines. The control strategy will be based on the following modules : a module estimating the total power available in the immediate future, a module deducing the plant wide power reserve needed to ensure proper frequency regulation, and a module performing the optimal power dispatching. The developed control strategy will be implemented and validated in simulation using software like and SOWFA.