Adaptive control of a wind turbine based on a DFIG using a grid-independent rotor supply

Abstract

The main objective of this article is to adapt an independent power supply system to optimize the energy production of a wind turbine and thus eliminate power outages on the electrical grid when supplying power to the rotor of a doubly-fed induction generator (DFIG). This system uses a permanent magnet synchronous generator (PMSG) to supply power to the DFIG rotor and offers robust control, comparing PI and sliding mode control methods as a function of varying reference parameters. We begin by presenting the dynamic model of the wind turbine connected to the various generators, followed by the electrical model of the PMSG and DFIG with the control strategy. Next, we explain the theory and mathematical equation of the AC/DC rectifier and the DC/AC inverter. Then, we present the PI controller and the sliding mode control method. Finally, simulation results comparing the PI and sliding mode control methods illustrate and demonstrate the performance and feasibility of this system.