Fractional-Order Synergetic Control of the Asynchronous Generator-Based Variable-Speed Multi-Rotor Wind Power Systems

This work provides regulation of active and reactive power for asynchronous generator-based multi-rotor wind power (MRWP) systems using a synergetic control based on fractional order control theory. The traditional synergetic control theory achieves an undesirable chattering effect, which can damage the system. For this, it is relevant to combine the traditional synergetic control theory with fractional order control to avoid these drawbacks. Two control schemes are proposed, analyzed, and compared: traditional direct power control (DPC) and DPC based on fractional-order synergetic controllers, the latter needs only the information of the sliding surface. Their characteristics are compared in terms of current quality, active and reactive power reference tracking, robustness against generator parameter variations, and power ripple. Simulation results using Matlab software have demonstrated the characteristics and robustness of the suggested DPC based on fractional-order synergetic controllers compared to the DPC because of its efficacy in improving the quality of power/current.