A Comparative Study of Field Oriented and Backstepping Control Strategies for Wind turbine PM Synchronous Generator

Abstract

In this paper, a comparative study of Field Oriented Control and Backstepping Control methods has been conducted to control a Permanent Magnet Synchronous Generator for wind power application. These control strategies are described and designed, then implemented using the Matlab/Simulink environment. Finally, the two different strategies are compared in response to active power, current, voltage, electromagnetic torque, and rotor speed. FOC allows us to independently control the torque and the flux of our machine in the same way as a DC machine with separate excitation, where the inducing current controls the magnetic flux, and the induced current controls the electromagnetic torque. We transformed the stator instantaneous currents to two current components, one which controls the flux (along the d axis), and the other controls the torque (along the q axis). The adaptive Backstepping control relies on the nonlinear model of the controlled system. It harnesses the principles of the Lyapunov stability theory to regulate various parameters and uphold the overall system’s stability. The findings of this research showed that firstly, backstipping control method is faster, less ripple, and more stable than the FOC method. Secondly, the THD in FOC method is higher than in backstipping control method. Finally, both control techniques have sinusoidal current and voltage waveforms. So, they can satisfy the grid code.