Print Email Facebook Twitter An opportunistic maintenance strategy for offshore wind turbine system considering optimal maintenance intervals of subsystems Title An opportunistic maintenance strategy for offshore wind turbine system considering optimal maintenance intervals of subsystems Author Li, M. (TU Delft Transport Engineering and Logistics; Harbin Engineering University) Wang, Mian (CSSC Cruise Technology Development) Kang, Jichuan (Harbin Engineering University; Naval Architecture and Offshore Technology) Sun, Liping (Harbin Engineering University) Jin, Peng (Harbin Engineering University) Date 2020 Abstract Operation and maintenance (O&M) costs account for a large proportion of the total costs for offshore wind energy. Performing a reasonable maintenance strategy is an effective approach to reduce O&M costs and gain more profits. In this paper, an opportunistic maintenance strategy for offshore wind turbine systems considering maintenance intervals of each subsystem is proposed to minimize the total maintenance cost. First, a Non-homogeneous Continuous-Time Markov Process based state transition model is established to study degradation process of subsystems. The influence of maintenance time schedule on the maintenance cost is studied to obtain the optimal maintenance intervals of each subsystems. Then, an opportunistic maintenance model considering economic dependencies between multiple subsystems is proposed to optimize the maintenance strategy by combining maintenance activities of individual subsystems to a grouping maintenance activity. A numerical example is used to indicate the significant effectiveness of the maintenance model. The result shows that the total maintenance cost of an offshore wind turbine system will be reduced by adopting the opportunistic maintenance strategy when compared with conventional preventive maintenance strategy. Subject Cost-effective maintenanceMaintenance optimizationOffshore wind energyOperation and maintenance To reference this document use: http://resolver.tudelft.nl/uuid:881588cf-b872-4c6d-8735-8083fa1478ff DOI https://doi.org/10.1016/j.oceaneng.2020.108067 Embargo date 2022-09-21 ISSN 0029-8018 Source Ocean Engineering, 216 Bibliographical note Accepted Author Manuscript Part of collection Institutional Repository Document type journal article Rights © 2020 M. Li, Mian Wang, Jichuan Kang, Liping Sun, Peng Jin Files PDF ocean_engineering.pdf 828.63 KB Close viewer /islandora/object/uuid:881588cf-b872-4c6d-8735-8083fa1478ff/datastream/OBJ/view