Variable Speed Control of Wind Turbines: A Robust Backstepping Approach

Robust backstepping control of variable speed wind turbines with permanent magnet synchronous generators

“…Especially in practical applications, uncertainties limit the efficient energy capture of a wind turbine. In the literature, different control strategies have been proposed for variable speed wind turbines [1], [2], [3], [4], [5], [6], [7]. In [1], Muldaji et al evaluated a variable speed, stall-regulated strategy which eliminates the need for ancillary aerodynamic control systems.…”

“…However the proposed adaptive controller scheme could only compensate for the uncertainties in the mechanical sub-system and required the exact knowledge of electrical sub-system parameters. In [5] and [6], the results in [4] was extended to compensate for the uncertainties of both electrical and mechanical sub-systems. In [6], the issues of external disturbances and modelling errors were also addressed.…”

Non-linear control of variable-speed wind turbines with permanent magnet synchronous generators: a robust backstepping approach

“…In this paper, 1 we have extended the previous results given in Ozbay et al (2008) and Sivrioglu et al (2008) to a more sophisticated variable-speed wind turbine model, and present a novel robust backstepping approach for the control problem of the variable-speed wind turbine with a permanent magnet synchronous generator (PMSG). Specifically, to compensate for the undesirable effects of parametric uncertainties, of both mechanical and electrical subsystems, a differentiable robust controller is proposed.…”

“…In Ozbay, Zergeroglu, and Sivrioglu (2008) and Sivrioglu, Ozbay, and Zergeroglu (2008), the control design in Song et al (2000) was extended to compensate for the uncertainties in both electrical and mechanical subsystems. In Sivrioglu et al (2008), the issues of external disturbances and modeling errors were also addressed. Recently high-order sliding-mode controllers have also been applied to variable-speed wind turbines (Beltran, Ahmed-Ali, and Hachemi Benbouzid 2009; Morfin, Loukianov, Canedo, and Castellanos 2010).…”

Adaptive passivity based individual pitch control for wind turbines in the full load region

“…The design of variable speed nonlinear controllers has received particular attention, also due to the fact that the nonlinear effects of the aerodynamic torque significantly simplify when the wind turbine operates in the partial load region. Interesting examples can be found in [3], [4], [5], [8], [20], [22], and [24]. However in the full load region the aerodynamic torque lacks of an explicit representation as a function of the tip speed ratio and the pitch angle; this has represented a major challenge for the application of nonlinear control methods such as e.g.…”