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Fractional Nonlinear Synergetic Control of Wind Turbine for Maximum Power Point Tracking

The focus of this paper is on improving the efficiency of wind turbine systems to optimize the output power provided from the turbine. We present a new design of a Fractional Nonlinear Synergetic Controller (FNSC) used to achieve maximum power point tracking (MPPT) of a wind energy conversion system with variable speed. The fractional order is introduced by taking a macro variable with fractional integral. The principal objective of the new design of the FNSC is to improve the performance of the synergetic control law. Three kinds of macro-variables are proposed in order to compare and show the advantage of the new proposed macro-variable. These controllers are tested with a non-linear wind turbine using a Simulink/Matlab environment. Compared to the conventional synergetic controller, the simulation results show good performance.