Research On Condition-based Opportunistic Maintenance Strategy Management System Of Wind Turbines

Wind turbines components have complex structure,with poor working conditions and present a higher failure rate.The traditional maintenance strategy base on time,which is excessive maintenance or insufficient maintenance,can’t satisfy the low maintenance cost of wind turbines and high availability requirements.Therefore,it is urgent to study scientific and reasonable maintenance strategy.In this paper,a new dynamic maintenance strategy for wind turbine is proposed,which is condition opportunistic maintenance strategy.The strategy based on Weibull proportional intensity model to describe the components of imperfect maintenance,using parts real-time condition monitoring information defined the condition indicator reflected the comprehensive parts running status,whether parts are given the need for maintenance and repairs what maintenance threshold function.The maximum maintenance and minimum maintenance are the most widely used maintenance model in building condition maintenance model.For wind power turbine,it is more meaningful to consider the incomplete maintenance.In the case of incomplete maintenance,the extension of the working age and the increase of the maintenance times make the components appear higher failure rate and shorter normal working time.The maintenance factor is used to describe the degree of incomplete maintenance of wind turbine components,and the different values of maintenance factors represent different maintenance degree of components.In the traditional maintenance strategy,maintenance threshold is set to a fixed value,without considering running time,maintenance degree and condition variables.In condition based opportunistic maintenance,the threshold was expanded into a dynamic threshold function which was more reasonable.It also introduces the basic principle of whether the components implement the condition maintenance strategy,which is based on the relationship between the condition indicator and the maintenance threshold function.Based on the condition evaluation of the wind turbine components,this paper puts forward the condition based opportunistic maintenance.The strategy adopts the condition maintenance,opportunity maintenance and free maintenance to describe maintenance activities,define the condition maintenance threshold function and opportunity maintenance threshold function,and according to the condition indicator and two threshold function to reflect the maintenance requirement and maintenance methods.This paper designs condition-based opportunistic maintenance strategy management system of wind turbines,embedded condition-based opportunistic maintenance strategy.Through real-time monitoring and condition assessment,we establish model of key components of the wind turbine to get the evaluation of it.Meanwhile,we can make the maintenance plan.