An improved integrated maintenance/spare parts management for wind turbine systems with adopting switching concept

In this work, we address an optimized integrated maintenance strategy and spare parts management problem for wind turbine system, with an observable level of degradation. The purpose of the study consists in establishing an improved maintenance strategy integrating a spare parts policy, according random production of energy over a given period. The wind turbine system failure rate is being modeled as a function of the current operating mode. Therefore, an improved maintenance strategy, characterized by a switching between both perfect and imperfect preventive maintenance actions, is developed and optimized. Formally, our objective is realized by the optimization of a total cost integrating maintenance action and spare parts management over a finite planning horizon, with considering the impact of the production rate on wind turbine system failure rate. A numerical study is realized in order to proof the robustness of the analytical model developed. (C) 2022 Published by Elsevier Ltd.