Abstract
The reliability analysis of offshore wind turbines is increasingly significant due to the system complexity and negative impacts in harsh operating conditions. Maintenance processes are required to ensure the system safety and performance. In this paper, an opportunistic maintenance strategy for an offshore wind turbine electrical and electronic system is proposed, considering imperfect maintenance and preventive maintenance durations. When one component reaches its reliability threshold, opportunistic preventive maintenance can be implemented for others. Based on the rolling horizon approach, the maintenance planning can be updated to take short-term information into account, which could be changed with time. By selecting the best combination, the maintenance schedule during the mission time is finally determined. Failure information is collected from previous literature studies to accomplish the calculations. The results show that the maintenance cost is significantly reduced by applying opportunistic maintenance and the control is the largest contributor to overall cost savings, followed by sensors.
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