USE OF STATE-SPACE MODELING TO EVALUATE AND CONTROL THE MODE SHAPES OF A LARGE-SCALE WIND TURBINE

EDUARDO JOSÉ NOVAES MENEZES; PEDRO  MANUEL GONZÁLEZ DEL FOYO; ALEX  MAURÍCIO ARAÚJO

doi:10.20906/CBA2022/259

EDUARDO JOSÉ NOVAES MENEZES Universidade Federal de Pernambuco
PEDRO MANUEL GONZÁLEZ DEL FOYO Universidade Federal de Pernambuco
ALEX MAURÍCIO ARAÚJO Universidade Federal de Pernambuco

DOI: https://doi.org/10.20906/CBA2022/259

Keywords: Wind turbines, Structural dynamics, State-space control, Mode shapes

Abstract

In this paper, an application of control-structure interaction is presented. The wind turbines are
complex systems, subjected to random wind loads, and with large and exible components. One of the main
functions of pitch control system is to regulate rotor speed in rated operation conditions and mitigate the dynamic loads in the mode shapes of the turbine. However, as a exible structure, the characterization of the mode shapes in uences in the aerodynamic forces on the rotor blades, changing also the rotor speed characteristics. In this regard, the mode shapes behavior can provoke oscillations in rotor speed control, due to the coupled dynamics. In this work, a state-space modeling is proposed to identify which are the problematic mode shapes and to cope with the wind turbine fully coupled dynamics.