Abstract:
Due to the intermittent nature of wind, the wind power output tends to be inconsistent, and hence maximum power point tracking
(MPPT) is usually employed to optimize the power extracted from the wind resource at a wide range of wind speeds. This paper
deals with the rotor speed control of a 2MWdirect-driven permanent magnet synchronous generator (PMSG) to achieve MPPT.
The proportional-integral (PI), proportional-derivative (PD), and proportional-integral-derivative (PID) controllers have widely
been employed in MPPT studies owing to their simple structure and simple design procedure. However, there are a number
of shortcomings associated with these controllers; the trial-and-error design procedure used to determine the P, I, and D gains
presents a possibility for poorly tuned controller gains, which reduces the accuracy and the dynamic performance of the entire
control system. Moreover, these controllers’ linear nature, constricted operating range, and their sensitivity to changes in machine
parameters make them ineffective when applied to nonlinear and uncertain systems. On the other hand, phase-lag compensators
are associated with a design procedure that is well defined from fundamental principles as opposed to the aforementioned trialand-
error design procedure.This makes the latter controller type more accurate, although it is not well developed yet, and hence it
is the focus of this paper.The simulation results demonstrated the effectiveness of the proposed MPPT controller.
