Journal ArticleDOI
Reliability of wind turbine subassemblies
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In this article, the authors investigated the reliability of more than 6000 modern onshore wind turbines and their subassemblies in Denmark and Germany over 11 years and particularly changes in reliability of generators, gearboxes and converters.Abstract:
We have investigated the reliability of more than 6000 modern onshore wind turbines and their subassemblies in Denmark and Germany over 11 years and particularly changes in reliability of generators, gearboxes and converters in a subset of 650 turbines in Schleswig Holstein, Germany. We first start by considering the average failure rate of turbine populations and then the average failure rates of wind turbine subassemblies. This analysis yields some surprising results about which subassemblies are the most unreliable. Then we proceed to consider the failure intensity function variation with time for wind turbines in one of these populations, using the Power Law Process, of three subassemblies; generator, gearbox and converter. This analysis shows that wind turbine gearboxes seem to be achieving reliabilities similar to gearboxes outside the wind industry. However, wind turbine generators and converters are both achieving reliabilities considerably below that of other industries but the reliability of these subassemblies improves with time. The paper also considers different wind turbine concepts. Then we conclude by proposing that offshore wind turbines should be subject to more rigorous reliability improvement measures, such as more thorough subassembly testing, to eliminate early failures. The early focus should be on converters and generators.read more
Citations
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Journal ArticleDOI
Through-life engineering services of wind turbines
TL;DR: In this article, a generic methodology to benchmark TES in industries is presented and used to assess TES for wind turbines in the wind industry by identifying the current state-of-the-art in methods and applications, requirements and needs, challenges, and opportunities.
Journal ArticleDOI
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Ping Xue,Yue Xiang,Jing Gou,Weiting Xu,Wei Sun,Zhuozhen Jiang,Shafqat Jawad,Huangjiang Zhao,Junyong Liu +8 more
TL;DR: In this article, a comprehensive reliability index system including two novel indexes quantifying EV charging service reliability is proposed, and considering traffic constraints and users' charging willingness, a spatial-temporal charging load model is introduced.
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Diagnostic monitoring of drivetrain in a 5 MW spar-type floating wind turbine using Hilbert spectral analysis
TL;DR: In this article, the authors investigated the frequency-based fault detection of a 5MW spar-type floating wind turbine (WT) gearbox using measurements of the global responses, which were utilized as inputs to a high-fidelity gearbox model developed using a multi-body simulation software (SIMPACK).
Proceedings ArticleDOI
Wind turbulence impacts to onshore and offshore wind turbines gearbox fatigue life
TL;DR: In this paper, the authors quantified gearbox load spectrum variation and cumulative fatigue damage to predict gearbox service life in wind turbines, which can be used for offshore wind turbine gearbox design optimization.
Journal ArticleDOI
A novel blind deconvolution based on sparse subspace recoding for condition monitoring of wind turbine gearbox
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References
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Journal ArticleDOI
Comparison of direct-drive and geared generator concepts for wind turbines
TL;DR: The DFIG1G seems the most attractive in terms of energy yield divided by cost, but the DDPMG has the highest energy yield, but although it is cheaper than the DDSG, it is more expensive than the generator systems with gearbox.
Journal ArticleDOI
Survey of Failures in Wind Power Systems With Focus on Swedish Wind Power Plants During 1997–2005
J. Ribrant,Lina Bertling +1 more
TL;DR: In this paper, the authors present results from an investigation of failure statistics from four sources, i.e. two separate sources from Sweden, one from Finland, and one from Germany, revealing reliability performance of the different components within the wind turbine.
Journal ArticleDOI
Reliability analysis for wind turbines
Peter Tavner,J. Xiang,F. Spinato +2 more
TL;DR: In this paper, the reliability of wind turbine components from historic German and Danish data has been analyzed using reliability analysis methods which are not only applicable to wind turbines but relate to any repairable system.
Book
Statistical Methods for the Reliability of Repairable Systems
Steven E. Rigdon,Asit P. Basu +1 more
TL;DR: Terminology and Notation for Repairable Systems and Probabilistic Models: The Poisson Process are reviewed.
Journal ArticleDOI
Condition monitoring and fault diagnosis of a wind turbine synchronous generator drive train
TL;DR: In this article, the application of wavelet transforms is investigated in the light of the disadvantages of spectral analysis in processing signals subject to the stochastic effects of the wind, and the technique can be used to monitor generator electrical and drive train mechanical faults.
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