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A fault diagnosis method and system for a generator set operating parameter measurement sensor

A technology for measuring sensors and operating parameters, applied in the direction of instruments, etc., can solve problems such as influence and weak correlation, and achieve the effects of preventing accidents, increasing safety and reliability, and reducing the cost of sensor fault diagnosis

Active Publication Date: 2017-12-12
ZHEJIANG UNIV
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Problems solved by technology

However, this method does not actually realize the screening of variables, and the principal components still contain relevant information about variables that are not strongly correlated.
Moreover, there are hundreds of measurement points in the generator set system that require soft measurement or detection of the accuracy of measurement data, and the cost of model storage and maintenance will inevitably affect the practical application of this method

Method used

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  • A fault diagnosis method and system for a generator set operating parameter measurement sensor
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  • A fault diagnosis method and system for a generator set operating parameter measurement sensor

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Embodiment Construction

[0022] The present invention will be more fully described with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the present invention can be embodied in many different forms, can monitor and diagnose many types of sensors, and should not be viewed as limited to the embodiments set forth herein; This disclosure is provided to satisfy applicable legal requirements. The substantive features of the present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The realization of the fault diagnosis method of the generator set operating parameter measurement sensor is as follows: figure 1 shown.

[0024] exist figure 1 , the left dotted box is the offline modeling flow chart, and the right is the online diagnosis flow chart. Artificial mechanism analysis 1-1 analyzes the historical data of the actual process, the purpose is to initiall...

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Abstract

The invention discloses a fault diagnosis method for a generator set operation parameter measurement sensor, which can be applied to the fault diagnosis method of the generator set operation parameter measurement sensor, including: offline modeling, obtaining auxiliary variables related to the parameters to be measured through mechanism analysis, and for all The auxiliary variables are quantitatively screened according to the degree of dependence, and the main auxiliary variables with strong dependence on the parameters to be measured are obtained; then the model and model coefficients used for online diagnosis are obtained through the PLSR modeling method based on B-spline transformation; Diagnosis, online B-spline transformation of real-time data, by loading the mathematical model between the parameters to be measured and the main auxiliary variables, the predicted value of the parameter Y to be measured is obtained, and the predicted data of the model is compared with the measured data by the "window moving method" The statistical characteristics of the sensor can realize the fault diagnosis of the sensor and identify the fault type of the sensor. The invention also discloses a fault diagnosis system for the measuring sensor of the operating parameters of the generating set.

Description

technical field [0001] The invention relates to fault diagnosis of an operating parameter measurement sensor applied to a generating set, in particular to a fault diagnosis method and system for an operating parameter measuring sensor of a generating set. Background technique [0002] Many measurement sensors in modern large-scale thermal power generation units work in a complex environment of high temperature, high pressure, and corrosion, and are subject to electromagnetic interference. They are more prone to failure than other parts of the system, making it difficult to guarantee the accuracy of measurement data. When the performance of the sensor deteriorates, malfunctions or fails, it will have a serious impact on the subsequent monitoring, control, fault diagnosis and other systems, resulting in misdiagnosis, false alarms, and even immeasurable losses. Therefore, it is of great significance to study how to detect and diagnose sensor faults in time. [0003] The basis ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
Inventor 陈坚红李鸿坤盛德仁李蔚
Owner ZHEJIANG UNIV
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