摘要
针对风力发电系统可靠性评估及运行维护存在的问题,对双馈风力发电系统运行原理、故障机制进行了研究,对部件主要故障类型进行了归纳,提出了一种基于可靠性理论的风力发电系统有向网络的马尔可夫维修模型,利用系统的状态转移关系建立了风力发电系统的状态转移图,进而运用马尔可夫过程方法对系统的可靠性进行分析,给出了系统各种瞬态和稳态指标的表达式并借助Matlab对其进行求解,在此基础上,深入探讨了部件的故障率、修复率变化对系统可用度的影响。研究结果表明,发电系统的稳态可用度由故障率、修复率因素共同决定,修复率对该系统达到平稳状态所需时间的贡献度较大,为风机制定可靠性最优的维护策略提供了理论支持。
Aiming at the problems of reliability evaluation and operational maintenance for the wind power generation system, the operation principle and fault mechanism of the doubly-fed induction wind turbines were studied, the main failure types of key components were summa- rized, the Markov repair model of directed-network based on reliability theory for wind power generation system was proposed, the state tran- sition diagram was establishedby using the relationship of the state transition, then the reliability of the system was analyzed by using Markov process method, the expressions of various transient and steady state index were given, with the help of matlab software to solve, on this ba- sis, the relationship between component failure rate and repair rate changes on the availability of the system was discussed deeply. The re- sults indicate that the stable availability of system can be decided by the failure rate and the repair rate, the repair rate contributes the most in the length of time the system needed to reaches a steady state the time, thus to provide the theory support for the establishment of the optimal maintenance strategy of wind turbine.
出处
《机电工程》
CAS
2015年第8期1136-1140,共5页
Journal of Mechanical & Electrical Engineering
关键词
风力发电系统
马尔可夫过程
故障机制
可靠性
维护策略
wind power generation system
Markov process
failure mechanism
reliability
maintenance strategy
