Method for evaluating state of transformer

A transformer and state technology, applied in the field of transformer state evaluation, can solve the problem of low accuracy of the evaluation method, and achieve the effect of improving accuracy and evaluating parameters comprehensively

Inactive Publication Date: 2019-05-03
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This application provides an evaluation method of transformer status

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for evaluating state of transformer
  • Method for evaluating state of transformer
  • Method for evaluating state of transformer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] see figure 1 , is a flow chart of a method for evaluating the state of a transformer provided by the present application. It can be known that the present application provides a method for evaluating the state of a transformer, and the method includes:

[0018] S01: Combining continuous numerical five-dimensional characteristic attributes and one-dimensional class labels to establish a historical knowledge base, wherein the five-dimensional characteristic attributes include line monitoring load rate, three-phase unbalance data, winding temperature rise, insulating oil Temperature rise, vibration data, one-dimensional class labels including transformer status

[0019] S02: Set a split point, and discretize the five-dimensional feature attribute of continuous numerical type into a Boolean attribute, and complete data preprocessing

[0020] After data preprocessing, the obtained data table is shown in Table 1:

[0021] Table 1 Data preprocessing table

[0022]

[002...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The application discloses a method for evaluating the state of a transformer. The method includes the following steps that: continuous numerical type five-dimensional feature attributes are combined with one-dimensional type class labels to establish a historical knowledge base, wherein the five-dimensional feature attributes include a load rate, three-phase unbalance degree data, a winding temperature rise, an insulation oil temperature rise, and vibration data and the one-dimensional type class labels include a transformer state; a split point is set and the continuous numerical type five-dimensional feature attributes are discretized into Boolean attributes to complete data preprocessing; a decision-making classification model based on Gini index attribute selection measurement is established; on the basis of a cross training method and a self-help training method, the model is evaluated and optimized to obtain a new decision-making classification model; and the state of a transformer is evaluated based on the new decision-making classification model. Comprehensive evaluation is carried out by using the five-dimensional attributes of the electrical quantities including the loadrate and the three-phase unbalance and the non-electrical quantities including the winding temperature rise, insulating oil temperature rise and vibration frequency; and the evaluation parameters become comprehensive based on the decision-making classification method of the Gini index attribute selection measurement, so that the evaluation accuracy is improved effectively.

Description

technical field [0001] The present application relates to the technical field of state evaluation of electric equipment, and in particular to a method for evaluating a state of a transformer. Background technique [0002] As power grid companies continue to promote the application of metering automation systems, and transformer manufacturers promote transformer windings, insulating oil temperature rise, and vibration monitoring, the feasibility of transformer state assessment based on data mining is gradually increasing. At present, the distribution network of Yunnan power grid has achieved full coverage of the metering automation system, and the amount of monitoring information data is huge, but the data integrity is insufficient, the data utilization rate is insufficient, and they are independent and non-interactive. [0003] At present, in terms of transformer evaluation based on the decision tree classification algorithm, the methods used as split attribute metrics mainl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G05B23/02
Inventor 李鹤健徐肖伟刘红文王科
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap