New strategies for optimized structural monitoring of wind farms: experimental campaign

Pacheco, João; Guimarães, Silvina; Moutinho, Carlos; Marques, Miguel; Matos, José Carlos; Magalhães, Filipe

doi:10.5194/wes-5-983-2020

Cited by 12 publications

(3 citation statements)

References 9 publications

(7 reference statements)

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“…A detailed description of the monitoring system is presented in Oliveira et al 11 In this application, the instrumentation is limited to the tower; still, it will be demonstrated that some modes dominated by the rotor can be followed. However, for a full characterization of the dynamic behavior of the wind turbine measurements at the blades are recommended, which can be done using the sensors described in Pacheco et al 19 …”

Section: Resultsmentioning

confidence: 99%

Modal decomposition of the dynamic response of wind turbine during one year of continuous monitoring

Oliveira

Magalhães

Cunha

et al. 2021

Struct Control Health Monit

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Summary The analysis of the dynamic behavior of wind turbines is a complex task. These structures present diverse configurations, dependent on the wind conditions. Consequently, the dynamic behavior is highly dependent on their operating conditions. This paper analyzes the dynamic behavior of a 2.0 MW wind turbine during 1 year of operation. In that sense, post‐processing tools aiming to decompose the measured vibration response of structures into modal responses, originally developed to be applied with the SSI‐DATA algorithm, are implemented and applied. Initially, an original data processing that permits the application of these tools to two additional output‐only modal identification algorithms is introduced. Then, these tools are applied for the first time to data collected in a wind turbine during a period of 1 year. The obtained results evidenced the effectiveness of the proposed post‐processing procedure and the distinct dynamic response of the wind turbine according to its operating conditions.

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Section: Resultsmentioning

confidence: 99%

Modal decomposition of the dynamic response of wind turbine during one year of continuous monitoring

Oliveira

Magalhães

Cunha

et al. 2021

Struct Control Health Monit

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“…This windfarm included 5 VESTAS V100 wind turbines, labelled from WT1 to WT5, with a rated power of 1.8 MW. The experimental campaign, described in detail in [20] for which 10-min averaged SCADA data was also available, includes accelerometers and strain gauges installed in both the tower and the blades of WT1 and WT5 (WT1 with the 3 blades instrumented and WT5 with two blades instrumented), namely a set of fibre optic strain gauges at each blade's root and the MEMS accelerometers described above placed at roughly 10m from the root, as represented in Figure 5. The methodology that will be presented in the following section will rely only on the latter.…”

Section: Experimental Campaign Overviewmentioning

confidence: 99%

Wind Turbine Geometrical and Operation Variables Reconstruction from Blade Acceleration Measurements

Pimenta,

Moutinho,

Magalhães

2023

Energies

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To develop reliable numerical models and better interpret monitoring campaigns experimental data of wind turbines, knowing the structure operation conditions, in particular the rotor angular velocity and blades’ pitch angle, is of paramount importance, but often not known due to confidentiality restrictions, or known with low time resolution (typically 10 min average values). In this work, it is shown analytically that blades accelerations measurements contain valuable information that allow for a better characterisation of the effective rotor shaft tilt and blades cone angle for different operating conditions. It is also shown that these measurements can be used to reconstruct the time history of the rotor angular velocity and blades’ pitch angle. After presented in an analytical framework, the methodology is validated with experimental data of two full scale wind turbines. The successful reconstruction of the rotor operating conditions shows that the method presented can be used to provide further insight into the dynamics of the structure that aids monitoring data analysis and provides an alternative method to monitor the SCADA systems themselves. The paper combines quite unique experimental data collected at two operating rotors with original data processing strategies that provide very valuable information to researchers and wind turbine operators.

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“…However, only the dynamic monitoring system of the tower accelerations and strains installed in wind turbine 1 are briefly described in this paper. A detailed description of the Tocha Wind Farm experimental campaign, as well as some preliminary results, can be found in [65].…”

Section: Tower Monitoring Systemmentioning

confidence: 99%

Fatigue Assessment of Wind Turbine Towers: Review of Processing Strategies with Illustrative Case Study

et al. 2022

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Wind turbines are structures predominantly subjected to dynamic loads throughout their period of life. In that sense, fatigue design plays a central role. Particularly, support structure design might be conservative with respect to fatigue, which may lead to a real fatigue life of considerably more than 20 years. For these reasons, the implementation of a fatigue monitoring system can be an important advantage for the management of wind farms, providing the following outputs: (i) estimation of the evolution of real fatigue condition; (ii) since the real condition of fatigue damage is known, these results could be an essential element for a decision about extending the lifespan of the structure and the possibility of repowering or overpowering; and (iii) the results of the instrumented wind turbines can be extrapolated to other wind turbines of the same wind farm. This paper reviews the procedures for calculating the fatigue damage of wind turbine towers using strain measurements. The applicability of the described procedures is demonstrated with experimental data acquired in an extensive experimental campaign developed at Tocha Wind Farm, an onshore wind farm located in Portugal, exploring the impact of several user-defined parameters on the fatigue results. The paper also includes the description of the data processing needed to convert raw measurements into bending moments and several validation and calibration steps.

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New strategies for optimized structural monitoring of wind farms: experimental campaign

Cited by 12 publications

References 9 publications

Modal decomposition of the dynamic response of wind turbine during one year of continuous monitoring

Modal decomposition of the dynamic response of wind turbine during one year of continuous monitoring

Wind Turbine Geometrical and Operation Variables Reconstruction from Blade Acceleration Measurements

Fatigue Assessment of Wind Turbine Towers: Review of Processing Strategies with Illustrative Case Study

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