Reliability Evaluation Method of Offshore Wind Turbine Based on Degradation State Monitoring
As the foundation structure of offshore wind turbines is more similar to that of offshore oil and gas platforms,transforming decommissioned offshore oil and gas platforms into support structures for offshore wind power foundations is an important way to reuse offshore oil and gas platforms.Howev-er,offshore wind energy is unstable and uncontrollable.In order to guarantee the safe operation of off-shore wind turbines,it is crucial to evaluate the reliability of offshore wind turbines.Therefore,a reli-ability assessment method based on degradation condition monitoring is studied.Firstly,the offshore wind turbine system is divided into nine subsystems:wind turbine,pitch,generator,gearbox,hy-draulic,electrical,yaw,brake,and inverter,and the failure states are simulated by data to define the failure distribution types of each subsystem of the offshore wind turbine,and the reliability assessment indexes such as the failure probability density distribution curve and the average failure-free time of each subsystem are obtained by simulation.Considering the wind turbine as a whole,the failure probability density function and the average life value of the system are obtained.Then,an offshore wind turbine reliability model based on the Markov method is established,the degradation state of the wind turbine is analyzed,and the probability and average duration of the wind turbine in different states are obtained through simulation calculation for example analysis.Based on the reliability-related parameters obtained from the established offshore wind turbine reliability assessment model,the operational status of the wind turbine can be better evaluated,which helps to develop a more reasonable maintenance plan.
offshore wind turbinedegradation status monitoringMarkov modelreliability assess-ment
NETL
NSTL
万方数据
