Online monitoring and diagnosis method and system of station unit

Abstract

The embodiment of the invention provides an online monitoring and diagnosis method and system of a station unit. The method includes the steps of obtaining operating data of all measuring points of all parts in the station unit, wherein the operating data includes bushing vibration data, load data or temperature data; fitting the operating data of the measuring points and a historical operating curve of the measuring points to obtain predicted operating data of the measuring points; determining early warning information of the measuring points on the basis of the predicted operating data and apreset threshold; and conducting frequency spectrum analysis with early warning information of any part within preset time as the operating data of the measuring point giving an alarm, and determining a failure diagnosis result of the part on the basis of a frequency spectrum analysis result and a preset diagnosis rule. By means of the method and system, the real-time monitoring and failure earlyearning of the station unit are realized, the failure diagnosis intelligence of the station unit is realized, the operation and maintenance pressure of the station unit can be effectively relieved, operation and maintenance cost is reduced, and operation and maintenance efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring, in particular to an on-line monitoring and diagnosis method and system of a pumping station unit. Background technique [0002] The excellent quality and high reliability of pumping station unit equipment are the fundamental requirements for the stable operation of hydropower plants, and will directly affect the operating costs and benefits of hydropower plants. Condition monitoring and fault diagnosis are the most effective ways to maintain the stable operation of the pumping station unit and reduce the maintenance and operation costs of the pumping station unit. [0003] But at present, only a small number of domestic hydropower plants have installed on-line monitoring and fault diagnosis systems for pumping station units, and most of them are in the trial operation stage, with a low degree of intelligence, and still need to invest a lot of manpower to ensure the stable operation of ...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides an online monitoring and diagnosis method and system for a pumping station unit, which is used to solve the problem that the existing monitoring and diagnosis system for a pumping station unit has a low degree of intelligence and requires a large amount of manpower for operation and maintenance

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