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Reliability analysis for wind turbines with incomplete failure data collected from after the date of initial installation (2009)
Journal Article
Guo, H., Watson, S., Tavner, P., & Xiang, J. (2009). Reliability analysis for wind turbines with incomplete failure data collected from after the date of initial installation. Reliability Engineering & System Safety, 94(6), 1057-1063. https://doi.org/10.1016/j.ress.2008.12.004

Reliability has an impact on wind energy project costs and benefits. Both life test data and field failure data can be used for reliability analysis. In wind energy industry, wind farm operators have greater interest in recording wind turbine operati... Read More about Reliability analysis for wind turbines with incomplete failure data collected from after the date of initial installation.

An Intelligent Approach to the Condition Monitoring of Large Scale Wind Turbines (2009)
Presentation / Conference Contribution
Large Scale Wind Turbines.

In view of the limitations of the condition monitoring (CM) techniques nowadays available for wind turbines (WTs), a fully intelligent condition monitoring technique has been developed in this paper using Empirical Mode Decomposition (EMD). The EMD m... Read More about An Intelligent Approach to the Condition Monitoring of Large Scale Wind Turbines.

Empirical mode decomposition, an adaptive approach for interpreting shaft vibratory signals of large rotating machinery (2009)
Journal Article
Yang, W., & Tavner, P. (2009). Empirical mode decomposition, an adaptive approach for interpreting shaft vibratory signals of large rotating machinery. Journal of Sound and Vibration, 321(3-5), 1144-1170. https://doi.org/10.1016/j.jsv.2008.10.012

The Fourier transform (FT) has been the most popular method for analyzing large rotating machine shaft vibration problems, but it assumes that these vibration signals are linear and stationary. However, in reality this is not always true. Nonlinear a... Read More about Empirical mode decomposition, an adaptive approach for interpreting shaft vibratory signals of large rotating machinery.

Condition monitoring and fault diagnosis of a wind turbine synchronous generator drive train (2009)
Journal Article
Yang, W., Tavner, P., & Wilkinson, M. (2009). Condition monitoring and fault diagnosis of a wind turbine synchronous generator drive train. IET Renewable Power Generation, 3(1), 1-11. https://doi.org/10.1049/iet-rpg%3A20080006

Some large grid connected wind turbines use a low-speed synchronous generator, directly coupled to the turbine, and a fully rated converter to transform power from the turbine to mains electricity. The condition monitoring and diagnosis of mechanical... Read More about Condition monitoring and fault diagnosis of a wind turbine synchronous generator drive train.

Review of condition monitoring of rotating electrical machines (2008)
Journal Article
Tavner, P. (2008). Review of condition monitoring of rotating electrical machines. IET Electric Power Applications, 2(4), 215-247. https://doi.org/10.1049/iet-epa%3A20070280

Condition monitoring of rotating electrical machinery has received intense research interest for more than 30 years. However, electrical machinery has been considered reliable and the application of fast-acting digital electrical protection has rathe... Read More about Review of condition monitoring of rotating electrical machines.

A multilevel modular converter for a large, lightweight wind turbine generator (2008)
Journal Article
Ng, C., Parker, M., Ran, L., Tavner, P., Bumby, J., & Spooner, E. (2008). A multilevel modular converter for a large, lightweight wind turbine generator. IEEE Transactions on Power Electronics, 23(3), 1062-1074. https://doi.org/10.1109/tpel.2008.921191

In an onshore horizontal axis wind turbine, generator and converter are usually in the nacelle on the top of the tower, while the grid step-up transformer is placed at the bottom. Electric power is transmitted down through flexible cables of high cur... Read More about A multilevel modular converter for a large, lightweight wind turbine generator.

Improved energy conversion for doubly fed wind generators (2006)
Journal Article
Smith, A., Todd, R., Barnes, M., & Tavner, P. (2006). Improved energy conversion for doubly fed wind generators. IEEE Transactions on Industry Applications, 42(6), 1421-1428. https://doi.org/10.1109/tia.2006.882640

There is currently significant interest in offshore wind turbines up to 5 MW. One of the preferred options is doubly fed slip-ring generators. Turbine manufacturers have proposed an operating scheme for low speeds that is claimed to improve the overa... Read More about Improved energy conversion for doubly fed wind generators.

Control of a Doubly Fed Induction Generator in a Wind Turbine During Grid Fault Ride-Through (2006)
Journal Article
Xiang, D., Ran, L., Tavner, P., & Yang, S. (2006). Control of a Doubly Fed Induction Generator in a Wind Turbine During Grid Fault Ride-Through. IEEE Transactions on Energy Conversion, 21(3), 652-662. https://doi.org/10.1109/tec.2006.875783

This paper analyzes the ability of a doubly fed induction generator (DFIG) in a wind turbine to ride through a grid fault and the limitations to its performance. The fundamental difficulty for the DFIG in ride-through is the electromotive force (EMF)... Read More about Control of a Doubly Fed Induction Generator in a Wind Turbine During Grid Fault Ride-Through.

Comparison of Direct-Drive and Geared Generator Concepts for Wind Turbines (2006)
Journal Article
Polinder, H., van der Pijl, F., de Vilder, G., & Tavner, P. (2006). Comparison of Direct-Drive and Geared Generator Concepts for Wind Turbines. IEEE Transactions on Energy Conversion, 21(3), 725-733. https://doi.org/10.1109/tec.2006.875476

The objective of this paper is to compare five different generator systems for wind turbines, namely the doubly-fed induction generator with three-stage gearbox (DFIG3G), the direct-drive synchronous generator with electrical excitation (DDSG), the d... Read More about Comparison of Direct-Drive and Geared Generator Concepts for Wind Turbines.

Reliability Analysis for Wind Turbines (2006)
Journal Article
Tavner, P., Xiang, J., & Spinato, F. (2006). Reliability Analysis for Wind Turbines. Wind Energy, 10(1), 1-18. https://doi.org/10.1002/we.204

Modern wind turbines are complex aerodynamic, mechanical and electrical machines incorporating sophisticated control systems. Wind turbines have been erected in increasing numbers in Europe, the USA and elsewhere. In Europe, Germany and Denmark have... Read More about Reliability Analysis for Wind Turbines.

Performance of BDFM as generator and motor (2006)
Journal Article
McMahon, R., Roberts, P., Wang, X., & Tavner, P. (2006). Performance of BDFM as generator and motor. IEE proceedings. Electric power applications, 153(2), 289-299. https://doi.org/10.1049/ip-epa%3A20050289

The performance of the brushless doubly-fed machine (BDFM) is analysed using a per-phase equivalent circuit. An expression for the rating of the machine as a function of magnetic and electric loadings is developed, and the rating is compared to those... Read More about Performance of BDFM as generator and motor.

Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm (2006)
Journal Article
Xiang, D., Ran, L., Bumby, J., Tavner, P., & Yang, S. (2006). Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm. IEEE Transactions on Power Delivery, 21(1), 463-471. https://doi.org/10.1109/tpwrd.2005.858785

Doubly fed induction generators (DFIGs) are an economic variable-speed solution for large wind turbines while high-voltage dc (HVdc) transmission is being considered for the grid connection of some offshore wind farms. This paper analyzes the need fo... Read More about Coordinated control of an HVDC link and doubly fed induction generators in a large offshore wind farm.