A Method of State Monitoring and Fault Diagnosis of Hydraulic Turbine Based on Chaos Theory

A technology of chaos theory and water turbines, applied in hydropower, mechanical equipment, engine components, etc., can solve problems such as difficult diagnosis of water turbine cavitation faults, and achieve the effect of improving safety, service life and system stability
CN105240187BActive Publication Date: 2017-09-22HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2017-09-22

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Abstract

The invention discloses a method for realizing state monitoring and fault diagnosis of a water turbine based on a chaos theory, in particular, relates to a method for operating state monitoring and fault diagnosis of the water turbine, can preferably master the characteristic of instability of an internal flowing field of the water turbine, and solves the problem of difficult diagnosis of cavitation fault of a traditional water turbine. The method uses the promotion of wavelet transform for denoising pressure pulsation signals, and uses a chaos dynamics method for analyzing chaos dynamics characteristics of the water turbine in off-design operation so as to judge the caviation degree in the operation of the water turbine and to predict possible faults. The method is applied to the operation state monitoring and the fault diagnosis of the water turbine.
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Description

technical field

[0001] The invention relates to a water turbine operating state monitoring and fault diagnosis method, which belongs to the field of water turbine state monitoring and fault detection. Background technique

[0002] The water turbine will be harmed by cavitation and cavitation erosion during operation. As time goes by, the local surface of some flow-passing parts will change, from the initial loss of luster to the gradual formation of hole-like erosion, and finally develop into some Shedding or perforation of metal parts; when cavitation and cavitation develop to the extent of destroying the normal flow of water, the energy loss of the turbine will increase sharply.

[0003] The traditional maintenance is post-event maintenance or maintenance according to the plan. The post-event maintenance is the maintenance after the accident, while the planned maintenance is the regular maintenance based on human experience or certain statistical rules. Turbine is an impo...

Claims

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