Local wind speed estimation, with application to wake impingement detection

Bottasso, Carlo L.; Cacciola, Stefano; Schreiber, Johannes

doi:10.1016/j.renene.2017.09.044

Cited by 56 publications

(71 citation statements)

References 20 publications

(22 reference statements)

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“…Two of them are sensitive to shaft bending loads and one of them is sensitive to torsional loading. The bending loads can be used for balancing the rotor and for the detection of shear inflow on the rotor disk [17]. The torsion loads, which are caused by the aerodynamic torque, are used for the evaluation of the rotor performance.…”

Section: Blade Manufacturing and Pitch Mechanismmentioning

confidence: 99%

Design of a multipurpose scaled wind turbine model

Nanos

Kheirallah

Campagnolo

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. This paper describes the methodology that was followed for designing a scaled wind turbine model. This model is intended to be used in complex terrain studies as well as deep array wind farm control tests. Therefore, emphasis was given on making it as compact as possible while keeping a high level of instrumentation. The result is a three blade wind turbine with rotor diameter of 0.6 m equipped with active pitch, yaw and torque control. After a discussion on the design procedure, we present preliminary performance characteristics of the model obtained experimentally. IntroductionWind tunnel testing is an invaluable tool for improving wind turbine efficiency and eventually reducing the levelized cost of energy from wind. The wind turbine component that has benefited the most from wind tunnel testing is certainly the blade, since wind tunnel testing of wind turbine airfoils was used from the very beginning of the wind energy industry [1]. However, wind tunnel testing embraced over the years more aspects of wind turbine design, going one step further from airfoil performance experiments to testing of scaled wind turbine models. Indeed, wind tunnel testing of scaled wind turbines has been used for a plethora of applications such as wake studies [2,3], wind turbine control tests [4], wind farm control validation [5] and complex terrain studies [6]. Undoubtedly, scaled wind turbine model design evolved over the years following the demand for new research applications. For example, in the MEXICO project [2, 3] a 4.5 m diameter wind turbine model was developed with highly instrumented blades with the purpose of creating a database of wake and rotor load data. In other wake studies smaller scaled wind turbines were used, such as the 10 cm diameter model that Chamoro et al. used in [7] or the 15 cm model developed by Bastankhah in [8]. Models of similar size have been used for simulating wind farms in a wind tunnel, as for example the nine scaled models of 12 cm rotor diameter used for simulating a 3×3 array in [9]. In [4], an aeroelastically scaled model of a Vestas V90 wind turbine was developed, featuring a 2 m rotor diameter and active torque, yaw and individual pitch control. In [5], a model with similar control capabilities but a smaller rigid rotor (1.1 m diameter) and flexible tower was developed.The above list, although not exhaustive, reveals the great diversity of scaled wind turbine models that exist in the literature. Some of them are quite sophisticated in terms of design and instrumentation, yet their size requires large wind tunnels and/or limits the number of wind turbines that can be used to avoid blockage or other undesirable effects. Some others are quite small and, despite being very useful for wind farm aerodynamic studies, they have limited capabilities and/or aerodynamic performance. In this paper we introduce a multipurpose scaled

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Section: Blade Manufacturing and Pitch Mechanismmentioning

confidence: 99%

Design of a multipurpose scaled wind turbine model

Nanos

Kheirallah

Campagnolo

et al. 2018

J. Phys.: Conf. Ser.

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“…In order to model the effect of pitch misalignment on hub loads, it is possible to recall the definition of cone coefficient, already introduced in [12,13]. The cone coefficient C m is a dimensionless measure of the out-of-plane blade bending moment as…”

Section: Aerodynamic Imbalance Modelmentioning

confidence: 99%

Monitoring rotor aerodynamic and mass imbalances through a self-balancing control

Cacciola

Riboldi

Croce

2018

J. Phys.: Conf. Ser.

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Abstract.A typical concern in rotating systems is related to rotor imbalances, which result typically from pitch misalignment and unbalanced mass distribution. A novel control for simultaneously targeting mass and pitch imbalances on the rotor is presented. Additionally, a novel detection strategy is developed in order to detect the imbalance source out of the behavior of the control action. More in depth, since the control will generate an artificial aerodynamic imbalance which compensates the pre-existent aerodynamic and inertial ones, one can find and interpret the fingerprint of the imbalance source in the behavior of the balancing controller. A clear advantage of this approach is that the imbalance detection is performed while the control keeps the machine working within its operating limits reducing the down-time and unscheduled maintenance actions.

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“…Location with wind speed not less and more than the class limit of wind speed can be utilized as a powerful wind farm, which is equal to 1.6 -17.1 m/s. This speed will be used to determine the number of blades or windmill blades [44]- [48], [48]- [50]. Turbine blades can utilize the ratio of the turbine blade and turbine spinning at wind speed or tip speed ratio (λ) of the designed model as given in following Equation 2.…”

Section: Thermal and Wind Potentialsmentioning

confidence: 99%

Mitigation of the alternative energy for the wind farm center considering temperature and wind speed

2018

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Recently, electric usages are increasing every year by year in many sectors. In facts, fossil fuels have been fueled to produce electrical energy availability at many power plants which are very limited for the sustainable procurement. Developing and implementing renewable energy sources should be urgently promoted to reduce the dependence on fossil fuels that have been fueled to generate electricity for the long period throughout various power plant combinations. In expectation, the natural source of electrical energy which environmentally friendly and easy to obtain in nature is recommended to explore for the existing energy producers. The natural source of energy can be operated as an alternative power plant to reduce environmental effects and to decrease air contaminants. These works cover those opportunities. In these studies, the method used is a quantitative category with collected primary and secondary data for all evaluations and mitigations. In general, these works are also designed for identifying problems and looking for literature, data collection, processing stage, analysis phase, and final conclusion. The data used is defined in terms of temperature, air pressure, and wind speed. The collected data are supposed to the Purwoharjo City of Banyuwangi Regency, with 10 meters above ground level. Naturally, the wind speed is about 3.5 m/s to 4 m/s and the average temperature is 300˚ Kelvin. The potentially generated wind energy at a single point of coordinates is around 85.17 Wh.

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Local wind speed estimation, with application to wake impingement detection

Cited by 56 publications

References 20 publications

Design of a multipurpose scaled wind turbine model

Design of a multipurpose scaled wind turbine model

Monitoring rotor aerodynamic and mass imbalances through a self-balancing control

Mitigation of the alternative energy for the wind farm center considering temperature and wind speed

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