Running state monitoring and diagnosing method of hydraulic turbine set

A diagnosis method and a technology of operating status, applied in the direction of engine testing, machine/structural component testing, measuring devices, etc., can solve the problems of lack of decision-making diagnosis technology, achieve perfect functions, and avoid major safety accidents.

Inactive Publication Date: 2016-10-12
STATE GRID CORP OF CHINA +2
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  • Description
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Problems solved by technology

At present, the research on monitoring and diagnosis of hydropower units mainly focuses on the monitoring of operating parameters, but lacks effective decision-making and diagnosis techniques.

Method used

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  • Running state monitoring and diagnosing method of hydraulic turbine set
  • Running state monitoring and diagnosing method of hydraulic turbine set
  • Running state monitoring and diagnosing method of hydraulic turbine set

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Embodiment Construction

[0033] Such as figure 1 As shown, the method for monitoring and diagnosing the operating state of the water turbine unit in this embodiment includes the steps of rubbing fault monitoring:

[0034] 1) Collect the rubbing detection signal of the top cover of the tested hydraulic unit. The rubbing detection signal includes the horizontal vibration signal, vertical vibration signal and water guide swing signal of the top cover of the hydraulic turbine unit, the horizontal vibration signal and vertical vibration signal of the top cover of the hydraulic turbine unit. Parameters such as signal and water guide swing signal are collected on-site by installing sensors;

[0035] 2) Construct the rubbing feature vector according to the rubbing detection signal of the top cover, and the rubbing feature vector (typical vector) is composed of three scalar quantities: the horizontal vibration signal, the vertical vibration signal and the hydraulic guide swing signal of the top cover of the hy...

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Abstract

The invention discloses a method for monitoring and diagnosing the running state of a water turbine unit, which includes the steps of rubbing fault monitoring: 1) collecting the rubbing detection signal of the top cover of the hydraulic turbine unit to be detected, and the rubbing detection signal includes the level of the top cover of the water turbine unit; Vibration signal, vertical vibration signal and water guide swing signal; 2) Construct the rubbing feature vector according to the rubbing detection signal of the top cover; 3) Use the weighted vector method to generate the weighted rubbing feature vector from multiple groups of rubbing feature vectors; 4 ) Calculate the vector distance between the weighted rubbing feature vector and the preset typical rubbing feature vector, if the vector distance is less than a given threshold, it is determined that the detected hydraulic turbine has a rubbing fault. The invention can accurately detect and diagnose rubbing faults of the detected hydraulic turbine unit, improve the function of the state monitoring system of the hydropower plant, and provide more useful information for remote analysis and diagnosis of experts, so as to carry out targeted troubleshooting on the occurrence of faults deal with.

Description

technical field [0001] The invention relates to a state monitoring analysis and diagnosis technology of a rotating machine, in particular to a method for monitoring and diagnosing an operating state of a water turbine unit. Background technique [0002] With the increase of the unit capacity of hydroelectric units and the increasing proportion in the power system, its importance is becoming more and more prominent. Due to the aging of unit equipment and metal structures in some old power plants after many years of operation, some defects have affected the safe operation of the power plant. In particular, remote monitoring technologies such as unit stability, cavitation, cracks, and energy indicators are still incomplete, and remote real-time diagnosis and decision-making technologies and methods are lacking. Therefore, the study of monitoring and real-time decision-making technology based on the working status of hydroelectric units can effectively ensure the safe operation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M15/00
CPCG01M15/00
Inventor 唐卫平乔亮亮
Owner STATE GRID CORP OF CHINA
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