Adaptive PI control and active tower damping compensation of a wind turbine

Abstract

This paper deals with the control problem of a wind turbine model working in the nominal zone. This process is a nonlinear system whose dynamics vary strongly depending on the operation point. In the nominal region, the wind turbine speed is controlled by means of the pitch angle to generate the nominal power. The wind fluctuations and its non-uniform special profile act as disturbances on the power generation and the tower deflections. These oscillations must be reduced to improve the wind turbine lifetime.In this work, an adaptive control structure operating on the pitch variable is proposed. It is composed of a gainscheduling PI control, an adaptive feedforward compensation of the wind speed and an adaptive gain compensation for the tower damping. The tuning of the controller parameters is formulated as an optimization problem that minimizes the tower fore-aft displacements and the deviation of the wind turbine speed from its nominal value. It is resolved using genetic algorithms for different linear models that are obtained from the nonlinear model.The proposed controller is compared with a classical baseline PI (Proportional-integral) controller and the simulation results show a significant improvement of the system performance when the proposed strategy is applied.

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

“…In order to assure a bumpless transfer between controllers without sudden changes in the control signal, all the PI controllers work in the integral tracking mode updating their integral action so that the output of the unselected controllers matches with that of the active controller. It is similar to the mechanism used to achieve anti-windup and bumpless transfer between automatic/manual modes in PID controllers [62,63]. The equation of a non-interactive PI controller is as follows:…”

Control descentralizado de un emulador de aerogenerador VS-VP con DFIG REAL

“…Debido al calentamiento global, actualmente existe un gran interés por las energías renovables. En este contexto, la energía eólica tiene un papel protagonista siendo una de las fuentes que ha experimentado un mayor crecimiento en las últimas décadas [4]. Ya que alrededor del 30% de las emisiones de gases de efecto invernadero se deben a la generación de electricidad, la energía eólica ha tenido un gran impulso como una de las principales renovables para reducir dichas emisiones [2].…”

Design of an Active Damping System for Vibration Control of Wind Turbine Towers

“…Coudurier et al [18] proposed a control strategy to improve the effectiveness of tuned liquid column dampers (TLCD) for offshore wind turbines. Some recent researches [19][20][21][22] proposed to reduce the vibrations on wind turbine towers by operating the pitch angles of the blades. Since the power production of wind turbines relies on the wind source captured by the blades, using the pitch control to damp the wind tower vibrations may lead to a loss in the power production.…”

“…To the best of our knowledge, an active damping system inside the wind turbine tower with such a device has not been discussed yet. In addition, most current research focuses on turbulent wind conditions [10][11][12]17,21,27]. In this paper, we study the feasibility of using the TRD for vibration control of wind turbine towers.…”