Robust Control Examples Applied to a Wind Turbine Simulated Model

Abstract

Wind turbine plants are complex dynamic and uncertain processes driven by stochastic inputs and disturbances, as well as different loads represented by gyroscopic, centrifugal and gravitational forces. Moreover, as their aerodynamic models are nonlinear, both modeling and control become challenging problems. On the one hand, high-fidelity simulators should contain different parameters and variables in order to accurately describe the main dynamic system behavior. Therefore, the development of modeling and control for wind turbine systems should consider these complexity aspects. On the other hand, these control solutions have to include the main wind turbine dynamic characteristics without becoming too complicated. The main point of this paper is thus to provide two practical examples of the development of robust control strategies when applied to a simulated wind turbine plant. Extended simulations with the wind turbine benchmark model and the Monte Carlo tool represent the instruments for assessing the robustness and reliability aspects of the developed control methodologies when the model-reality mismatch and measurement errors are also considered. Advantages and drawbacks of these regulation methods are also highlighted with respect to different control strategies via proper performance metrics.

Adaptive signal processing strategy for a wind farm system fault accommodation

“…This represents another important contribution of the work. Note that this paper extends the methods addressed in (Simani and Castaldi (2017)) and compares the results already presented in ).…”

“…An important issue not considered in Castaldi (2018, 2017)) and possibly limiting the achievable performances of the FTC design, is represented by the interactions and internal feedback among the wind turbines, which can mask the effects of the faults affecting the wind turbines themselves, as described in the following. The wind farm model consists of three parts depicted in Fig.…”

Adaptive Pitch Controller of a Large-Scale Wind Turbine Using Multi-Objective Optimization

“…In this case, it is necessary to maintain the generator power and, consequently, the generator speed, at their nominal values. This is performed by means of controllers that act on the blade pitch angle to modify the wind turbine aerodynamics limiting the energy extracted from the wind [10]. In this region, the generated power (P g ) depends exclusively on the generator speed (ω g ) according to Equation (1), since the generator torque is kept constant at its rated value.…”

Value-Set-Based Approach to Robust Stability Analysis for Ellipsoidal Families of Fractional-Order Polynomials with Complicated Uncertainty Structure

“…Robustness plays a fundamental role in automatic control theory and practice [1][2][3][4]. Parametric uncertainty represents a natural, effective, but also a relatively simple tool for the mathematical description of real-life systems with potentially complex behavior (including nonlinearities, fast dynamics or changes in physical parameters) by means of linear time-invariant (LTI) models.…”