三峡电厂振摆监测系统应用分析

随着状态监测与故障诊断技术的快速发展,振摆监测系统作为重要的机组稳定性监测系统在水电行业已得到广泛应用。但面对复杂的信号,如何提取有价值的信息,从而指导检修决策的制定则需要长期经验积累。本文介绍了三峡电厂振摆监测系统结构与功能、测点布置与传感器选型,对利用振摆监测系统开展的诊断分析案例从机械、电磁、水力、基础结构四个方面进行分类介绍,同时对开展的相关试验以及取得的重要成果进行简要描述,以期水电同行能加深对该系统的认识,提高信号分析与故障诊断能力。

Application analysis on vibration monitoring system of Three Gorges hydropower plant

As technologies of state monitoring and fault diagnosis are developing rapidly, vibration monitoring as a key stability condition monitoring device, is widely used in the hydropower industry. How to extract valuable information from complex signals for decision making of maintenance, needs long-term accumulation of practical experiences. This paper describes the structure and functions of a runout monitoring system adopted for the Three Gorges power plant, together with the arrangement of measuring points and the types of sensors considered, and presents a summary on the cases of vibration diagnosis and analysis, focusing on four aspects of the system: its mechanical, electrical and hydraulic features and its basic structure. Test results and main achievements of the system are briefly discussed for better understanding of such systems and their benefits for improving signal analysis and fault diagnosis.