发电设备状态监测及故障诊断系统

【作者】 王利平；

【导师】 曹一家；

【作者基本信息】 浙江大学 ， 电气工程， 2006， 硕士

【摘要】 随着以微处理器为基础的分散控制系统(DCS)在国内电厂中的广泛应用，热工自动化技术水平大大提高，实现了对汽轮机、锅炉的统一监控和管理，电厂电气部分自动化水平相对落后一些，但经过近几年的发展，许多电气设备也已纳入到DCS控制的范畴，实现了厂用电的顺控、切换等功能。电力系统竞争日益激烈，如何减少电力生产成本也显得越来越重要，而实行状态检修就是一种十分有力的手段。通过对发电设备的故障分析及几种常用检修模式的比较，指出实施状态检修的先进性。对发电设备进行在线实时远程监控，对其运行状态进行在线监测、诊断和管理，可以大大提高绝缘试验的真实性与灵敏度，及时发现绝缘缺陷，为提高设备投运率和降低检修成本提供科学的量化依据与专家决策建议，为实现以状态检修取代计划检修提供了可靠的依据。本文提出一个基于集散控制系统和FIX组态软件的分级实时状态监测系统方案，利用现场实时数据对厂内主要设备进行故障预测与初步诊断。在此基础上，利用Web技术，终端用户可以根据不同的权限身份，通过网络随时查询各种数据信息，及时掌握设备的实时状态，为实现状态检修打下良好的基础。更多还原

【Abstract】 With the spread of microprocessor-based distributed control system (DCS) in power plants, the automated control level of thermal process is greatly enhanced, enabling unified supervisory control of steam turbines and boilers. After recent development, many electric types of equipment are controlled by DCS. For example, sequential control and automated switcher control are applied in station-service power.With the growing competition in power industry, it is more important to decrease the cost of power production. Condition-based Maintenance is a very useful way to make it. The paper is going to find out the merit of Condition-based Maintenance through fault analysis of electric equipment and comparison between several common inspection ways. The remote real time supervisory system is made up of online monitoring, diagnoses and management. The system can find malfunction more quickly and improve validity and precision of insulate test widely. It also supplies data for reasonable quantification and professional decision, which will improve operation rate and reduces cost of product. Through the real time system, the traditional planned- Maintenance can be placed by condition-based Maintenance. A scheme of on-line monitor system based on DCS and FIX is put forward in this paper, which can forecast and diagnose main electric equipment fault through the real time data. By web technology, client users of different limit privilege can get different data of the system at any moment. The necessary and sufficient information makes the good foundation for the work of Condition-based Maintenance.更多还原