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Wind and Structures
  Volume 15, Number 4, July 2012 , pages 285-299
DOI: https://doi.org/10.12989/was.2012.15.4.285
 


Structural monitoring of a wind turbine steel tower – Part I: system description and calibration
C. Rebelo, M. Veljkovic, L. Simoes da Silva, R. Simoes and J. Henriques

 
Abstract
    This paper describes the development and calibration of a structural monitoring system installed in a 80 meters high steel wind tower supporting a 2.1 MW turbine Wind Class III IEC2a erected in the central part of Portugal. The several signals are measured at four different levels and include accelerations, strains on the tower wall and inside the connection bolts, inclinations and temperature. In order to correlate measurements with the wind velocity and direction and with the turbine operational parameters the corresponding signals are obtained directly from the turbine own monitoring system and are incorporated in the developed system. Results from the system calibration, the structural identification and the initial period of data acquisition are presented in this paper.
 
Key Words
    Wind tower; steel; monitoring; wind loading; modal identification; stresses; dynamic response
 
Address
C. Rebelo, L. Simoes da Silva, R. Simoes and J. Henriques :
ISISE, Civil Engineering Department, University of Coimbra, Rua Luis Reis Santos, Coimbra, Portugal
M. Veljkovic :Lulea University of Technology, SE-97187 Lulea, Sweden
 

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