State Maintenance Strategy of Wind Turbine Based on Stochastic Degradation Model

Abstract

At present, the maintenance of wind turbines is mainly based on regular maintenance and post-failure maintenance, which is prone to cause over maintenance and insufficient maintenance, and wind turbine failures are random events. Therefore, a state maintenance strategy of wind turbine based on stochastic degradation model is proposed. The degradation process of wind turbine is described by stochastic differential equation. The availability of wind turbines is analyzed based on the update process theory. Secondly, the optimal maintenance time combination of the wind turbine is calculated based on the availability constraint; finally, it is verified by Matlab simulation.The results show that compared with the periodic maintenance strategy and the Weibull model maintenance strategy, the strategy proposed in this paper has lower maintenance costs, effectively avoids over maintenance and insufficient maintenance, and ensures high reliability of the wind turbine.