Multi-reliability index evaluation and maintenance period optimization method of wind turbine considering failure correlation

A multi-reliability index evaluation and maintenance period optimization method of wind turbine considering failure correlation is proposed to address the problems that the most existing reliability evaluation methods of wind turbine fail to consider the failure correlation among system components and often rely on a single reliability index to conduct reliability evaluation. Firstly, considering the failure correlation among system components, the reliability model of wind turbine and its comprehensive reliability model for component are established. Secondly, based on the sequential Monte Carlo simulation, a multi-reliability index evaluation method of wind turbine considering failure correlation and maintenance combination strategy is presented. Moreover, the maintenance period optimization method of wind turbine is proposed by using the unit time cost as the objective function. Finally, the effectiveness of the proposed method is verified through example analysis.