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    Wind turbine reliability data review and impacts on levelised cost of energy

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    dao_et_al_2019 (2.836Mb)
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    Publication date
    2019-12
    Author
    Dao, Cuong
    Kazemtabrizi, B.
    Crabtree, C.
    Keyword
    Downtime
    Failure rate
    Levelised cost of energy
    Reliability
    Uncertainty
    Wind turbine
    Rights
    (c) 2019 The Authors. This is an Open Access article distributed under the Creative Commons CC-BY license (http://creativecommons.org/licenses/by/4.0/)
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Reliability is critical to the design, operation, maintenance, and performance assessment and improvement of wind turbines (WTs). This paper systematically reviews publicly available reliability data for both onshore and offshore WTs and investigates the impacts of reliability on the cost of energy. WT failure rates and downtimes, broken down by subassembly, are collated from 18 publicly available databases including over 18 000 WTs, corresponding to over 90 000 turbine‐years. The data are classified based on the types of data collected (failure rate and stop rate) and by onshore and offshore populations. A comprehensive analysis is performed to investigate WT subassembly reliability data variations, identify critical subassemblies, compare onshore and offshore WT reliability, and understand possible sources of uncertainty. Large variations in both failure rates and downtimes are observed, and the skew in failure rate distribution implies that large databases with low failure rates, despite their diverse populations, are less uncertain than more targeted surveys, which are easily skewed by WT type failures. A model is presented to evaluate the levelised cost of energy as a function of WT failure rates and downtimes. A numerical study proves a strong and nonlinear relationship between WT reliability and operation and maintenance expenditure as well as annual energy production. Together with the cost analysis model, the findings can help WT operators identify the optimal degree of reliability improvement to minimise the levelised cost of energy.
    URI
    http://hdl.handle.net/10454/17974
    Version
    Published version
    Citation
    Dao C, Kazemtabrizi B and Crabtree C (2019) Wind turbine reliability data review and impacts on levelised cost of energy. Wind Energy. 22(12): 1848-1871.
    Link to publisher’s version
    https://doi.org/10.1002/we.2404
    Type
    Article
    Collections
    Engineering and Informatics Publications

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