Data-based qualitative analysis method of influence factors of circuit breaker faults

A technology for circuit breaker faults and influencing factors, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the stability verification of the undetermined cause of circuit breaker faults, and achieve the expansion of iterative computing capabilities, increase in The effect of calculating dimensions and facilitating data verification

Active Publication Date: 2017-10-27
无锡启工数据科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The present invention is aimed at the analysis of current circuit breaker failure influencing factors, and proposes an efficient, accurate and comprehensive data-based qualitative analysis method for

Method used

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  • Data-based qualitative analysis method of influence factors of circuit breaker faults
  • Data-based qualitative analysis method of influence factors of circuit breaker faults
  • Data-based qualitative analysis method of influence factors of circuit breaker faults

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Embodiment 1

[0025] At present, the cause analysis of switchgear failures in the power grid industry is mainly based on manual experience, which is highly subjective, has large errors, lacks pertinence in maintenance, and insufficient utilization of equipment information and fault data. The preprocessing part process is too simple to deal with high-dimensional data characteristics, and the stability of the analysis model is insufficient, and there is too little work in the verification stage, which is not conducive to the expansion of data, and the results are not objective and accurate enough.

[0026] Aiming at the problems of fault data processing, analysis model construction and model verification in the existing circuit breaker fault cause analysis method, the present invention proposes a data-based qualitative analysis method for circuit breaker fault influencing factors. For the main process, see figure 1 , mainly including the preprocessing of fault data, the construction and verifi...

Embodiment 2

[0040] The data-based qualitative analysis method of circuit breaker fault influencing factors is the same as embodiment 1, and the Gaussian mixture model described in step (3) of the present invention is mainly to provide a reasonable continuous attribute discretization method to adapt to the characteristics of switchgear fault data, and to ensure The accuracy of CMAR classification, the Gaussian mixture model believes that the probability density function curve of the data is obtained by mixing and weighting multiple single Gaussian distributions.

[0041] (3.1) Suppose a set of vector points x i (i=1,2...n'), a total of n' observations, the distribution of this group of points is composed of K Gaussian distribution mixture, which means that the sample points are discretized into K intervals during the discretization process, where the Gaussian mixture The definition of the model is:

[0042]

[0043] where π k ∈[0,1], Indicates the influence factor of each Gaussian d...

Embodiment 3

[0054] The qualitative analysis method of data-based circuit breaker fault influencing factors is the same as that of embodiment 1-2, and the fault data reduction described in the step (4) of the present invention is to calculate the information gain rate of each attribute, and perform sorting selection, information gain The specific calculation formula of the rate is as follows:

[0055]

[0056] In the formula, A represents an attribute, Gain(A) represents the information gain of attribute A, and SplitInfo A (S) represents the information generated after the attribute A in the dataset is divided.

[0057] The formula for calculating the information gain Gain(A) is as follows:

[0058]

[0059] Intrinsic information value SplitInfo A (S) The calculation formula is as follows:

[0060]

[0061] Among them, Info(S) and Info A (S) represent the entropy values ​​before and after the attribute division of the data set S, respectively, pi Indicates that any tuple in S ...

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Abstract

The invention discloses a data-based qualitative analysis method of influence factors of circuit breaker faults. The method solves prior problems of insufficient utilization of circuit breaker fault data, too subjective positioning of fault causes, insufficient stability of a qualitative analysis model and the like. According to the method, the key influence factors of all types of the circuit breaker faults are found through mining and analyzing the circuit breaker fault data. The method includes the realization steps of defining an original fault data set; cleaning the fault data; transforming the fault data; reducing the fault data; constructing a qualitative analysis model of the influence factors of the faults, and carrying out ten times of ten-fold cross-validation; and obtaining association rules between the faults and attributes, and obtaining the influence factors of all the types of the circuit breaker faults by qualitative analysis. According to the method, a supervised learning algorithm of CMAR is utilized for modeling, and with data amount increasing, the accuracy of the model will be continuously improved. At the same time, the robustness of the qualitative analysis model is guaranteed by the ten times of the ten-fold cross-validation, and the influence factors of the circuit breaker faults can be effectively analyzed.

Description

technical field [0001] The invention belongs to the technical field of power equipment application, and mainly relates to the qualitative analysis and excavation of circuit breaker failure influencing factors, specifically a data-based qualitative analysis method of circuit breaker failure influencing factors, which is applied to the improvement of circuit breaker equipment and its operation Maintenance provides a reference basis. Background technique [0002] As the country's economic development has entered a new normal, electricity has become the driving force for the development of all walks of life, and people have put forward higher demands for uninterrupted supply of electricity. Due to various potential and complex factors, power transmission and distribution failures often occur during the power supply process, which will not only cause serious damage to economic development, but also affect industrial production efficiency and people's quality of life. How to ensu...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06K9/62
CPCG06F30/20G06F18/285G06F18/214G06F18/24
Inventor 孔宪光黄小瑜常建涛王佩杨挺
Owner 无锡启工数据科技有限公司
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