【作者】 余雄伟；

【导师】 李朝晖； 艾友忠；

【作者基本信息】 华中科技大学 ， 水利水电工程， 2005， 硕士

【摘要】 随着电厂状态检修的逐步开展,水电机组作为水电厂生产设备,其设备状态成为水电企业优化维护决策的重要依据。本文旨在研究水轮机组优化维护系统中调速系统优化维护专家工作站实现的技术方法及其现场应用。我国水电企业设备维护正在以预防性计划检修和预知性状态检修相结合,综合考虑多方面因素,以提高设备利用率及可靠性为目标,以经济效益最大化为最终目的的优化维护体制发展。在此背景下,本文将优化维护思想应用到水电厂,明确了优化维护专家工作站在优化维护系统中的作用,指出研究面向专家的状态信息表达方法的必要性; 以及在对设备故障机理认识不够深入的情况下,充分利用调速专家的推理能力和经验进行设备优化维护决策的重要性。本文结合中国长江电力股份有限公司葛洲坝电厂“最优检修信息系统”项目下的“调速设备优化维护系统”子项目进行机组故障诊断研究开发工作。针对水轮机调速器实时在线诊断的需求,阐述了以人为中心的水轮机调速器状态信息表达和交互式故障诊断过程,探讨了基于故障树的交互式诊断的功能框架。最后介绍了系统在葛洲坝电厂19#发电机运行情况,给出了实现结果。系统成功运行验证了面向专家的状态信息表达方法和基于故障树的交互式诊断方法的可行性。运行结果表明系统实现了机组实时状态监测功能,极大丰富了机组系统运行信息,节省了运行与检修人力与物力,有效地提高了水电机组运行与维护质量及检修的有效性与经济性,对于水电厂逐步实现向状态检修过渡具有积极的推动意义。更多还原

【Abstract】 Hydro-electric Generating Unit(HGU)is the main equipment in hydro power plants. With the development of Condition-Based Maintenance (CBM) for hydro power plants, the condition of HGU has become the most important factor for hydro power plants’maintenance. Architecture of the Optimal Maintenance Expert Workstation for the Turbine Governor (OMEWTG) is proposed in this dissertation. Scheduled Maintenance must be considered to combine with Predictive Maintenance and other factors. The idea of applying device optimal maintenance to the overhaul of hydro-turbine sets to realize the Optimal Maintenance for turbine governor is put forward. The thesis discussed the frame of device optimal maintenance system, and the function of OMEWTG. It is necessary to study the Oriented-Expert Expression for State Information and the Interactive Diagnosis Process. This paper is based on the program Condition Monitoring and Diagnosis System of Governors, which is a subsystem of the Hydro Power Plant Optimal Maintenance Information System cooperated with the Gezhouba Hydropower Plant of China Yangtze Power Co. Ltd. A system is brought forward,which construct with the real-time condition monitoring and the processes of the human-centered interactive diagnose. it presents the frameworks of OMEWTG in this paper. At last the system for 19# HGU of Gezhouba Hydropower Plant is investigated and the field application results are given. The field application results have demonstrated that the methods are feasible.更多还原