Method and detection system for diagnosing potential failure of pump system

Abstract

The invention provides a method and a detection system for diagnosing a potential failure of a pump system. The method comprises the following steps of establishing a healthy motor-pump model by collecting the voltage and current of a motor; training the healthy motor-pump model by using any phase of current and voltage as the input of the healthy motor-pump model and using a fault indicator FDI as the output of the healthy motor-pump model; obtaining a model estimator per unit time through the trained healthy motor-pump model according to the voltage and current values in unit time, obtaininga FDIC value according to the model estimator per unit time and the fault indicator FDI calculated in a measured signal in unit time; determining whether the pump system is faulty according to the FDIC value; and if the pump system is faulty, detecting the phase relationship between the current harmonic components of the motor through a high-order spectrum, and determining whether the motor is faulty. The invention can determine whether the motor or the pump is faulty by analyzing the current and voltage signals of the motor.

Description

technical field [0001] The invention relates to the field of pump fault detection, in particular to a method and a detection system for diagnosing potential faults of a pump system. Background technique [0002] Pumping station blowdown systems are used to lift wastewater from low elevations to higher elevations to maintain a continuous downhill gradient for receiving wastewater treatment facilities. When the sewage system of the pumping station fails, it may cause serious environmental damage and property loss. To avoid such incidents, sewer system operators employ various monitoring methods to detect component failures so that maintenance actions can be taken before damage occurs. One method that is commonly used is periodic manual inspections. The inspection cycle can range from one or more inspections per day to weekly inspections. In any case, manual inspections involve the travel of each pump station blowdown system, and since most pump station blowdown systems are ...

AI Technical Summary

Problems solved by technology

The fuel pump fault diagnosis system described in this patent has defects in the acquisition of acceleration signals, and there is no detailed description of the specific signal collection points; the method is not very operable for specific actual fault sites; the analysis method is too simple

[0005] The typical practice of high-end monitoring systems i

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