Local and Central Control of a Wind Farm for Active Power Adjustment

The work presented in this paper deals with the active power control in a wind faun based on both central and local control levels. A central supervision unit (CSU) ensures the power coordination between the local supervision units (LSU) of each wind turbine. In the local supervision unit, a power management has been developed in order to adjust the distribution of the faun's production. The main contribution of the developed work is the adjustment of the delivered power by each wind turbine using an additional control of the pitch angle. Consequently, power control flexibility for the wind faun system was established by considering either maximum power point tracking (MPPT) mode or limited power point tracking (LPPT) mode. Therefore, the LSU inside each wind turbine control effectively coordinates with the power distribution received from the CSU according to the wind faun available power. Simulation results presented in this paper have shown the good performance and the high stability of the proposed supervision strategy for the considered wind faun.