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B Connor – One of the best experts on this subject based on the ideXlab platform.

  • control of variable speed Wind Turbines design task
    International Journal of Control, 2000
    Co-Authors: W E Leithead, B Connor
    Abstract:

    Owing to concern over the environment, there is much interest in renewable sources of electrical powepower generation, of which one of the most promising is Wind power. There are essentially two types of Wind Turbines, namely constant speed and variable speed machines. In comparison to constant speed Wind Turbines, variable speed Wind Turbines are perceived to have several potential advantages which outweigh the considerable cost of the power electronics required to realize variable speed operation. The two frequently mentioned ones are: additional energy capture below rated Wind speed and additional power-train compliance and associated load alleviation above rated Wind speed. The purpose of this paper is to investigate the design of the control system (as opposed to the synthesis of the controller) for variable speed Wind Turbines. The choice of control strategy is investigated and appropriate realizations of the controller, to cater for the implementation issues of accommodation of variation in the plant d…

  • control of variable speed Wind Turbines dynamic models
    International Journal of Control, 2000
    Co-Authors: W E Leithead, B Connor
    Abstract:

    Owing to concern over the environment, there is much interest in renewable sources of electrical powepower generation, of which one of the most promising is Wind power. Wind Turbines exploit this energy source to directly generate electrical power. There are essentially two types of WindTurbines, namely constant speed and variable speed machines. The purpose of this paper is to investigate the dynamics of variable speed Wind Turbines and determine suitable models to support the control desidesign task. A basic but widely used dynamic representation of variable speed Wind Turbines and the corresponding models of the control plant dynamics are initially discussed. More detailed, yet still simple models, are derived separately for the rotor aerodynamics, the drive-train dynamics and the power genegeneration unit dynamics before being combined to form the complete model of the Wind turbine dynamics. The resulting combined model, in addition to supporting the control desidesign task, enables the extent, to which the basic mod…

W E Leithead – One of the best experts on this subject based on the ideXlab platform.

  • control of variable speed Wind Turbines design task
    International Journal of Control, 2000
    Co-Authors: W E Leithead, B Connor
    Abstract:

    Owing to concern over the environment, there is much interest in renewable sources of electrical power generation, of which one of the most promising is Wind power. There are essentially two types of Wind Turbines, namely constant speed and variable speed machines. In comparison to constant speed Wind Turbines, variable speed Wind Turbines are perceived to have several potential advantages which outweigh the considerable cost of the power electronics required to realize variable speed operation. The two frequently mentioned ones are: additional energy capture below rated Wind speed and additional power-train compliance and associated load alleviation above rated Wind speed. The purpose of this paper is to investigate the design of the control system (as opposed to the synthesis of the controller) for variable speed Wind Turbines. The choice of control strategy is investigated and appropriate realizations of the controller, to cater for the implementation issues of accommodation of variation in the plant d…

  • control of variable speed Wind Turbines dynamic models
    International Journal of Control, 2000
    Co-Authors: W E Leithead, B Connor
    Abstract:

    Owing to concern over the environment, there is much interest in renewable sources of electrical power generation, of which one of the most promising is Wind power. Wind Turbines exploit this energy source to directly generate electrical power. There are essentially two types of WindTurbines, namely constant speed and variable speed machines. The purpose of this paper is to investigate the dynamics of variable speed Wind Turbines and determine suitable models to support the control design task. A basic but widely used dynamic representation of variable speed Wind Turbines and the corresponding models of the control plant dynamics are initially discussed. More detailed, yet still simple models, are derived separately for the rotor aerodynamics, the drive-train dynamics and the power generation unit dynamics before being combined to form the complete model of the Wind turbine dynamics. The resulting combined model, in addition to supporting the control design task, enables the extent, to which the basic mod…

Weifei Hu – One of the best experts on this subject based on the ideXlab platform.

  • Emerging Technologies for Next-Generation Wind Turbines
    Advanced Wind Turbine Technology, 2018
    Co-Authors: Weifei Hu
    Abstract:

    To increase the performance and reliability of next-generation Wind Turbines, the technology must continue to evolve building on earlier successes in Wind energy and other fields. This chapter provides an introduction and in-depth survey of four emerging technologies: permanent magnetic direct drive, 3D printing, anti-icing and deicing, and data-mining techniques, particularly used for Wind energy. The merits of each technology are briefly described as follows. The Wind Turbines with permanent magnetic direct-drive generators could offer higher efficiency of energy conversion and lower maintenance cost than traditional Wind turbine designs with gearboxes. The 3D printing technology opens a new Window for rapid design and manufacturing of Wind turbine systems, e.g., use of 3D printing of Wind turbine blade molds for new blade design. The anti-icing and deicing technology could improve the performance and reliability of Wind Turbines and lower the safety risks for Wind Turbines installed in cold-climate areas. Various data-mining techniques take full advantage of the huge amounts of available data from Wind Turbines and/or Wind farms, acquire useful information within, and eventually lower the Wind energy cost. The fundamental concepts, main classifications, and key applications and contributions of these four types of emerging technologies are elaborated.

  • structural reliability analysis of Wind Turbines a review
    Energies, 2017
    Co-Authors: Zhiyu Jiang, Weifei Hu, Wenbin Dong
    Abstract:

    The paper presents a detailed review of the state-of-the-art research activities on structural reliability analysis of Wind Turbines between the 1990s and 2017. We describe the reliability methods including the first- and second-order reliability methods and the simulation reliability methods and show the procedure for and application areas of structural reliability analysis of Wind Turbines. Further, we critically review the various structural reliability studies on rotor blades, bottom-fixed support structures, floating systems and mechanical and electrical components. Finally, future applications of structural reliability methods to Wind turbine designs are discussed.

J A Ferreira – One of the best experts on this subject based on the ideXlab platform.

Andrew Kusiak – One of the best experts on this subject based on the ideXlab platform.

  • Performance Assessment of Wind Turbines: Data-Derived Quantitative Metrics
    IEEE Transactions on Sustainable Energy, 2017
    Co-Authors: Yusen He, Andrew Kusiak
    Abstract:

    Deteriorating performance of Wind Turbines results in power loses. A two-phase approach for performance evaluation of Wind Turbines is presented at past and future time intervals. Historical Wind turbine data is utilized to determine the past performance, while performance at future time horizons calls for power prediction. In phase I of the proposed approach, Wind power is predicted by an ensemble of extreme learning machines using parameters such as Wind speed, Wind temperature, and the rotor speed. In phase II, the predicted power is used to construct Copula models. It has been demonstrated that the parameters of the Copula models serve as usable metrics for expressing performance of Wind Turbines. The Frank Copula model performs best among the five parametric models tested.

  • Virtual Wind Speed Sensor for Wind Turbines
    Journal of Energy Engineering-asce, 2011
    Co-Authors: Andrew Kusiak, Haiyang Zheng, Zijun Zhang
    Abstract:

    A data-driven approach for development of a virtual Windspeed sensor for Wind Turbines is presented. The virtual Windspeed sensor is built from historical Wind-farm data by data-mining algorithms. Four different data-mining algorithms are used to develop models using Wind-speed data collected by anemometers of various Wind Turbines on a Wind farm. The computational results produced by different algorithms are discussed. The neural network (NN) with the multilayer perceptron (MLP) algorithm produced the most accurate Wind-speed prediction among all the algorithms tested. Wavelets are employed to denoise the high-frequency Wind-speed data measured by anemometers. The models built with data-mining algorithms on the basis of the wavelet-transformed data are to serve as virtual Wind-speed sensors for Wind Turbines. The Wind speed generated by a virtual sensor can be used for different purposes, including online monitoring and calibration of the Wind-speed sensors, as well as providing reliable Wind-speed input to a turbine controller. The approach presented in this paper is applicable to utility-scale Wind Turbines of any type. DOI: 10.1061/(ASCE)EY.1943-7897.0000035. © 2011 American Society of Civil Engineers. CE Database subject headings: Turbines; Wind speed; Data collection; Neural networks; Dynamic models; Wavelet; Probe instruments; Statistics. Author keywords: Wind turbine; Wind speed; Data mining; Neural network; Dynamic modeling; Wavelet transformation; Virtual sensor; Statistical control chart.