NDLI: An optimal group maintenance policy for multi-unit offshore wind turbines located in remote areas

Content Provider	IEEE Xplore Digital Library
Author	Shafiee, M.
Copyright Year	2014
Description	Author affiliation: Centre for Offshore Renewable Energy Eng., Cranfield Univ., Cranfield, UK (Shafiee, M.)
Abstract	Many offshore wind farms are planned to be built in remote sea locations due to high wind resources. However, the difficulties in accessing and maintaining wind turbines lead to increased operation and maintenance (O&M) costs and subsequently, increased cost of energy (COE). In order to share the maintenance set-up costs and reduce the power production losses, the group maintenance policies are widely used in offshore wind energy industry. In this paper, we investigate an optimal group maintenance policy for a multi-unit wind turbine system located in cold, icy or remote offshore areas. Each individual unit is exposed to a gradual degradation phenomenon that takes place in different forms of wear, corrosion, erosion, fatigue and crack generation. The whole system undergoes an unplanned maintenance action when the degradation level of one of units reaches its critical size; otherwise a planned group maintenance task is conducted at the operational age T (>0). We propose an optimization model to determine the optimal time T* such that the average long-run maintenance cost per unit time is minimized. Finally, the proposed model is applied to a three-bladed rotor system and the results are compared with the individual maintenance of blades.
Starting Page	1
Ending Page	6
File Size	309113
Page Count	6
File Format	PDF
ISBN	9781479935611
DOI	10.1109/PMAPS.2014.6960615
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-07-07
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Degradation Average long-run maintenance cost Blades Rotors Maintenance engineering Wind farms Offshore wind turbine Wind turbines Optimization Preventive maintenance Remote location
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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