大规模并网风电机组预防性维护动态控制策略研究

项目名称： 大规模并网风电机组预防性维护动态控制策略研究

项目编号： No.61263004

项目类型： 地区科学基金项目

立项/批准年度： 2013

项目学科： 自动化技术、计算机技术

项目作者： 苏宏升

作者单位： 兰州交通大学

项目金额： 44万元

中文摘要： 风电机组由于其地处偏远、气候和环境条件相对恶劣，且设备检修常须登高作业，一旦出现故障，修复往往非常困难。随着风电机组的并网和单机容量的不断增大，对风电机组进行早期故监测和预防性维护非常重要。传统的预防性维护检测间隔期采用静态控制策略，缺乏动态性和实时性，结果造成维护费用和备品库存偏高。近年来，一些检测间隔期不等的控制策略被报道，但由于模型抽象，控制不稳定，实践中很少采用。因此，本课题以风电场稳态运营时的安全生产为目标，结合可靠性数学、线性控制理论及随机过程等相关知识，对风电机组的运行状态进行建模，提出一种依据设备状态对风电机组预防性维护检测间隔期进行控制的动态控制策略。讨论控制系统的稳定性，证明控制策略的有效性，结合状态估计给出具体实施方案。建立费用评估模型并进行具体应用，比较说明该控制方案的有效性。这对确保风电场安全生产、提高预防性维护决策质量、促进风电产业的健康发展意义重大。

中文关键词： 预防性维护；线性系统；动态控制；状态估计；误差

英文摘要： In view of the fact that wind turbines locate in the remote region of relatively abominable climate and enviroment, and fireheight-ascending operation is often required for equipments maintenance. Hence, once failure occurs, the restoration of wind turbines is often quite difficult.With grid connected operation of wind turbines and continuous enlargement in capacity of single unit, it is quite important for wind turbines to implement incipient fault supervision and preventive maintenance. Traditionally,the inspection intervals determination of preventive maintenance adopts the static control strategies with the lack of dynamic nature and real-time performance, this consequently leads to a higher maintenance cost and larger inventory capacity. In recent years,several control strategies are reported with heterogenious inspection interval. But in practice, they are seldom applied due to the abstract models provided and unstable control.Hence,Focusing on the safety production-centred aim of wind farm at steady state, combing the related knowledge such as reliability mathematics, and linear control theory, and as well as stochastic process, the project establishes the state model for wind-power generators, and proposes a new dynamic control strategy to perform control on inspection interval of preventive maintenance

英文关键词： Preventive maintenance；linear system；dynamical control；state estimation；error