火电厂风机故障预警系统的应用研究

发布时间：2018-06-06 00:06

本文选题：风机 + 故障预警　；参考：《华北电力大学》2015年硕士论文

【摘要】：随着火电厂自动化水平的不断提高,增强发电机组设备的可靠性运行和可维修性变得越来越重要。电厂中传统的设备检修方式日益暴露出其局限性,由于设备故障而造成的机组停机受到发电企业的高度重视,对发电机组设备进行预防性维修变得十分重要。设备故障预警系统能够对设备故障提前报告、确保设备安全稳定运行、降低设备故障发生率和提高机组设备的管理能力。作为火电厂的主要辅机设备,风机系统用于保证足够的空气进入炉膛并及时排出,其运行的安全稳定性对于发电机组的安全经济运行起着至关重要的作用,因此对风机系统进行故障预警具有重要的现实意义。本文结合工程实际,以火电厂风机为对象完成故障预警系统的实现过程。首先,介绍了风机故障预警系统所采用的多元状态估计技术和相似性原理,利用多元状态估计方法对当前风机的运行状态进行估计,得到风机各测点的预测值,通过相似系数函数得到风机的相似度曲线和相似度监测线,当相似度曲线低于相似度监测线时,开始对风机进行预警。其次,对风机故障预警系统的总体设计方案进行了阐述,包含风机系统以及故障预警系统总体实施路线的介绍。最后,详细介绍了风机故障预警系统的设计与实现过程,并将该风机故障预警系统在山西某电厂中进行了应用。应用结果表明:该风机故障预警系统能够对风机的运行状态进行监测,在故障形成的早期发现征兆进行预警,同时提高了电厂设备的管理水平和处理故障的效率,对提升电厂的经济效益起着积极的作用。
[Abstract]:With the improvement of automation level of thermal power plants, it is more and more important to enhance the reliability and maintainability of generating units. The limitation of the traditional equipment maintenance mode in power plant is exposed day by day. The unit shutdown caused by the equipment failure is attached great importance to by the power generation enterprise, so it is very important to carry on the preventive maintenance to the generator set equipment. The equipment fault warning system can report the equipment failure in advance, ensure the safe and stable operation of the equipment, reduce the occurrence rate of the equipment failure and improve the management ability of the unit equipment. As the main auxiliary equipment of the thermal power plant, the fan system is used to ensure enough air into the furnace and discharge in time. The safety and stability of its operation plays an important role in the safe and economic operation of the generator set. Therefore, it is of great practical significance to predict the fault of fan system. Combined with engineering practice, this paper takes the fan of thermal power plant as the object to complete the realization process of the fault warning system. Firstly, the multivariate state estimation technology and similarity principle used in fan fault warning system are introduced, and the operating state of fan is estimated by using multivariate state estimation method, and the predicted values of each measuring point of fan are obtained. The similarity curve and the similarity monitoring line of the fan are obtained by similarity coefficient function. When the similarity curve is lower than the similarity monitoring line, the fan is given early warning. Secondly, the overall design scheme of fan fault warning system is described, including the introduction of fan system and the overall implementation route of fault warning system. Finally, the design and implementation of the fan fault warning system are introduced in detail, and the fan fault warning system is applied in a power plant in Shanxi province. The application results show that the fan fault warning system can monitor the running state of the fan, detect the early signs of the fault formation, and improve the management level of the power plant equipment and the efficiency of the fault treatment. It plays a positive role in promoting the economic benefits of power plants.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM621

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