Dynamic threshold based three-dimensional (3D) quantitative set health evaluation method

Abstract

The invention aims at providing a dynamic threshold based 3D quantitative set health evaluation method. According to the technical scheme, the method comprises the steps that a comprehensive 3D evaluation system based on set components, component associated physical attributes and corresponding measuring points is constructed according to the actual situation of a set; different weights of the different components are set according to the importance of the components to the unit, and different weights of the different physical attributes are set according to the importance of the physical attributes to associated components; fixed thresholds of component associated physical attribute parameters are determined; and a mean value [mu]ijk and a variance value [sigma] of normal distribution ofa large amount of xijk data is calculated according to physical attribute data xijk acquired by a kth measurement point according to the jth physical attribute of the ith component within a unit operation time t, and a dynamic threshold range of the kth measurement point according to the [mu] ijk and the [sigma] is determined. The method is suitable for quantitative evaluation of the running stateof the set.

Description

technical field

[0001] The invention relates to a three-dimensional health quantitative evaluation method of a unit based on a dynamic threshold. Applicable to the quantitative evaluation method of the operating state of the unit. Background technique

[0002] At present, the industry generally adopts the method of state division for the evaluation of the operating state of large-scale generating sets, and divides them into three types: normal state, abnormal state and fault state. For the two states of abnormality and failure, two fixed thresholds are often preset. When the real-time value of a certain parameter sensor exceeds the corresponding fixed preset threshold, it is determined which state the sensor parameter is in.

[0003] The problem with this judgment method at present is that the evaluation threshold is fixed, often an industry standard value, which cannot correctly reflect the specific conditions of the equipment parameters under specific working conditions, ...

Examples

Embodiment Construction

[0040] Such as figure 1 As shown, this embodiment is a three-dimensional health quantitative evaluation method for units based on dynamic thresholds, and the specific steps are as follows:

[0041] S01. According to the actual situation of the unit, construct a comprehensive three-dimensional evaluation system based on unit components, component-related physical attributes and measurement points;

[0042] The unit is composed of a parts, and each part contains b kinds of physical properties, such as pressure, temperature, amplitude, etc., corresponding to each physical property, there are c measuring points, and the measuring points are equipped with corresponding data acquisition sensors; corresponding to different Components, the values ​​of b and c can be different;

[0043] The physical attribute data x collected by the kth sensor under the jth physical quantity of the i-th component ijk ;

[0044] Where 1≤i≤a, 1≤j≤b, 1≤k≤c;

[0045] S02. Set different weights p, p acc...

technical field

[0001] The invention relates to a three-dimensional health quantitative evaluation method of a unit based on a dynamic threshold. Applicable to the quantitative evaluation method of the operating state of the unit. Background technique

[0002] At present, the industry generally adopts the method of state division for the evaluation of the operating state of large-scale generating sets, and divides them into three types: normal state, abnormal state and fault state. For the two states of abnormality and failure, two fixed thresholds are often preset. When the real-time value of a certain parameter sensor exceeds the corresponding fixed preset threshold, it is determined which state the sensor parameter is in.

[0003] The problem with this judgment method at present is that the evaluation threshold is fixed, often an industry standard value, which cannot correctly reflect the specific conditions of the equipment parameters under specific working conditions, ...

Examples

Embodiment Construction

[0040] Such as figure 1 As shown, this embodiment is a three-dimensional health quantitative evaluation method for units based on dynamic thresholds, and the specific steps are as follows:

[0041] S01. According to the actual situation of the unit, construct a comprehensive three-dimensional evaluation system based on unit components, component-related physical attributes and measurement points;

[0042] The unit is composed of a parts, and each part contains b kinds of physical properties, such as pressure, temperature, amplitude, etc., corresponding to each physical property, there are c measuring points, and the measuring points are equipped with corresponding data acquisition sensors; corresponding to different Components, the values ​​of b and c can be different;

[0043] The physical attribute data x collected by the kth sensor under the jth physical quantity of the i-th component ijk ;

[0044] Where 1≤i≤a, 1≤j≤b, 1≤k≤c;

[0045] S02. Set different weights p, p acc...

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