关键词: 非完美预防性维修, 风电机组, 维修决策, 虚龄因子, 故障率加速因子, 遗传算法

Abstract: To make the maintenance decision based on reliability consistent with the actual operational and maintenance process,and to improve the comprehensive economic benefit of wind farm,the failure rate function update model of wind turbine was provided based on the existing imperfect maintenance models considering the principle of generalized renewal process.Furthermore,the multi-objective periodic dynamic imperfect preventive maintenance model of wind turbine was developed on the premise of considering set-up cost and ensuring the basic availability of wind farm.The optimal solution was achieved with genetic algorithm,which compared with two traditional maintenance strategies that were perfect preventive maintenance strategy and maintenance strategy without the influence of number of minimal maintenance on set-up cost.The sensitivity analysis was made,and the economic benefit,effectiveness and feasibility of the proposed model were validated.

Key words: imperfect preventive maintenance, wind turbines, maintenance decision, virtual age factor, failure rate accelerated factor, genetic algorithms