Power quality improvement of a wind farm without adding any type of storage system

The wind power is characterized by fluctuation due to intermittent primary source, which can damage the electrical network stability because of the imbalance between production and consumption. To solve this problem, this paper is focused on the dynamic of wind farm made by the association of N-aerogenerators with Permanent Magnetic Synchronous Generator (PMSG). The scope of this work is to investigate a new control strategy to ensure a balance, at each instant, between the wind farm generated power and the required one by the consumers without adding any type of storage systems. The proposed wind farm control is composed of two hierarchical structures. The first one is the global control applied to the manager wind turbine which has the responsibility to make, on the one hand, the wind farm generated power smooth and to ensure, on the other hand, the energy balance. The second one is the local control corresponding to the slaves wind turbines which are used only to produce the maximum of energy. The performance and the robustness of the proposed control strategy is evaluated and discussed by simulations.