风电机组典型故障维修决策

发布时间：2018-08-13 20:32

【摘要】：调整能源结构、发展清洁能源、促进节能减排是我国能源行业发展的长期目标。如今随着国家电力体制改革的推进,“一带一路”战略规划的实施,风电作为我国可再生能源行业中比较成熟的产业迎来新一轮机遇期。在风电装机容量逐年上升、机组运行时间增加的现状下,风电场业主对加强风电机组维修决策管理、控制运维成本、维护机组安全健康运行提出更高要求。在现行风电机组状态监测手段下,基于多元参数融合的以故障模式为诊断结果的风电机组故障诊断业务快速发展,鉴于风电机组维修工作的特殊性,相比于传统的从设备出发,从故障模式出发的维修决策流程更贴近工程应用。本文首先从故障率及故障时发电量损失等角度进行统计分析,确定风电机组主要系统的典型故障模式作为研究对象,逐一对故障模式进行属性分类和编码,并利用故障模式失效影响分析和故障树分析方法对所有故障模式进行详尽的定性定量分析,作为各类维修任务决策的基础和依据。然后针对华锐SL1500风电机组典型故障模式进行基于风险优先数和层次分析法的风险等级评价,同时结合RCM逻辑决断图分析方法,给出针对不同风险等级故障模式的维修方式决策流程；对于利用故障树分析法演绎推理出的故障模式所有底事件,本文依据其概率重要度和维修事件性质进行划分,制定出针对基本维修事件的维修方式决策方法。当单一故障发生时,如何在照常运行、加强监测、在线维修、现场维修和停机检修中选择合理的维修活动,本文采取决策树分析法描述维修方案路径,设定维修属性因素权重并进行评价打分,通过比较估算出的维修方案期望效用值来选择最优方案；对于多故障模式并发和多故障原因排查的情形,本文提出了基于FMEA和FTA定量分析的维修方案决策方法,提高了维修针对性和故障发生后快速定位故障原因的可能性,制定出维修方案决策报告；对于采取事后维修方式以及无法进行在线状态监测的故障及设备,制定系统层面的常规维护检修方案。最后本文提出了一套风电机组维修决策管理系统设计方案,通过维修方式和维修方案决策流程及内容的动态实现指导维修工作,以期实现风电机组典型故障维修决策研究的工程应用。
[Abstract]:Adjusting energy structure, developing clean energy and promoting energy saving and emission reduction are the long-term goals of energy industry in China. With the development of national electric power system reform and the implementation of "Belt and Road" strategic plan, wind power, as a relatively mature industry in renewable energy industry of our country, ushered in a new round of opportunity period. Under the situation that the installed capacity of wind power is increasing year by year and the operating time of the unit is increasing, the owners of wind farm put forward higher requirements to strengthen the maintenance decision management of wind power unit, control the operation cost and maintain the safe and healthy operation of the unit. Under the current wind turbine condition monitoring means, the fault diagnosis business of wind turbine based on multi-parameter fusion is developing rapidly. In view of the particularity of wind turbine maintenance work, compared with the traditional equipment, The maintenance decision process based on fault mode is closer to engineering application. In this paper, the typical fault mode of the main system of wind turbine is selected as the research object, and the fault mode is classified and coded one by one from the point of view of failure rate and power loss. The methods of fault mode failure impact analysis and fault tree analysis are used to analyze all failure modes qualitatively and quantitatively, which is the basis and basis of all kinds of maintenance task decision. Then the risk grade evaluation based on risk priority number and analytic hierarchy process (AHP) is carried out for typical fault mode of Sinovel SL1500 wind turbine unit. At the same time, combined with RCM logic decision diagram analysis method, The decision flow of maintenance mode for different risk level fault modes is given, and all the bottom events of fault mode deduced by fault tree analysis are divided according to their probability importance and the nature of maintenance events. The decision method of maintenance mode for basic maintenance events is developed. When a single fault occurs, how to select reasonable maintenance activities in routine operation, strengthening monitoring, on-line maintenance, on-site maintenance and downtime maintenance, this paper uses decision tree analysis method to describe the path of maintenance scheme. Setting the weight of maintenance attribute factors and evaluating and scoring, selecting the optimal scheme by comparing the estimated expected utility value of the maintenance scheme. In this paper, a maintenance scheme decision method based on quantitative analysis of FMEA and FTA is put forward, which improves the pertinence of maintenance and the possibility of quickly locating the cause of failure after the failure occurs, and draws up the decision report of maintenance scheme. The routine maintenance and repair scheme at the system level is established for the failure and equipment which can not be monitored on line by means of ex post maintenance. Finally, this paper puts forward a design scheme of maintenance decision management system for wind turbine, which can guide maintenance work dynamically by means of maintenance mode and decision process and content of maintenance scheme. The purpose of this paper is to realize the engineering application of the research on the maintenance decision of typical fault of wind turbine.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM315

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