Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A screening method for harmonic main feature groups based on similar feature fusion

A technology of similar characteristics and screening methods, applied in the field of harmonic pollution in power systems, can solve problems such as large influence of calculation errors and large errors, and achieve comprehensive and more reasonable conclusions

Active Publication Date: 2019-01-22
STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the working condition to be analyzed is quite different from the sample working condition, different harmonic source models have a great influence on the calculation error
[0006] At present, the idea of ​​harmonic source modeling is to simplify the model structure, so the error is large

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
  • A screening method for harmonic main feature groups based on similar feature fusion
  • A screening method for harmonic main feature groups based on similar feature fusion
  • A screening method for harmonic main feature groups based on similar feature fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 As shown, this embodiment provides a method for screening harmonic main feature groups based on similar feature fusion, which specifically includes the following steps:

[0033] Step S1: Subtract the reference limit value C of each harmonic current from the harmonic current monitoring samples 0 , decentralize the harmonic current monitoring samples, and get the decentralized value C * ;

[0034] Step S2: Calculate the similarity index of the harmonic current monitoring samples: record S 24*24 for C * The similarity index matrix between each harmonic in , S(i,j) represents the similarity between the i-th harmonic current and the j-th harmonic current monitoring sample, where, 1≤i,j≤25 , calculate S(i,j) according to the following formula, and the result is between 1 and -1:

[0035]

[0036] Step S3: Screen the main featu...

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 invention relates to a harmonic wave main characteristic group screening method based on similar characteristic fusion, comprising steps of performing decentralization on a monitoring sample of harmonic wave current, obtaining a decentralized numerical value, calculating a similarity index of the monitoring sample of the harmonic wave current, and screening out a main characteristic group on the basis of the similarity index distribution characteristics. The harmonic wave main characteristic group screening method can fast determine the main harmonic wave pollution times of a monitoring point.

Description

technical field [0001] The invention relates to the field of harmonic pollution in power systems, in particular to a method for screening harmonic main feature groups based on similar feature fusion. Background technique [0002] With the grid-connected operation of a large number of power electronic devices and the increase in the number of other nonlinear loads, the harmonic pollution in the power system is becoming more and more serious. At present, a relatively complete online monitoring network for power quality has been built, which can monitor the total harmonic distortion rate of grid voltage, the content rate and phase angle of each harmonic voltage, the total harmonic distortion rate of current, the content rate of each harmonic current, Harmonic information such as RMS and phase angle. A large amount of online monitoring information is helpful for users to model harmonic pollution and obtain basic data of users' operation. However, a complete harmonic model incl...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01R23/16
CPCG01R23/16
Inventor 邵振国陈锦植吴敏辉潘夏余桂钰陈烨霆林炜傅志成张婷婷涂承谦林坤杰张嫣
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com