Power quality disturbance identification method and device based on wavelet transform

A technology of power quality disturbance and wavelet transform, which can be used in measuring devices, measuring electrical variables, character and pattern recognition, etc., and can solve problems such as power quality disturbance

Inactive Publication Date: 2018-12-28
INST OF AUTOMATION CHINESE ACAD OF SCI
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above-mentioned problems in the prior art, that is, in order to solve the technical problem of how to accurately identify power quality disturbances

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
  • Power quality disturbance identification method and device based on wavelet transform
  • Power quality disturbance identification method and device based on wavelet transform
  • Power quality disturbance identification method and device based on wavelet transform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0057] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.

[0058] The main steps of a wavelet transform-based power quality disturbance identification method provided by the present invention are described below in conjunction with the accompanying drawings. like figure 1 As shown, in this embodiment, the power quality disturbance can be identified according to the following steps:

[0059] Step S101: Using wavelet transform multi-resolution analysis method to analyze the pre-acquired power quality disturbance signal and obtain the feature vector of the power quality disturbance signal according to the analysis result. Specifically, in this embodiment, the eigenvector of the power quality disturbanc...

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 the technical field of power quality analysis, in particular to a power quality disturbance identification method and a device based on wavelet transform, and the technical problem of how to accurately identify the power quality disturbance. For the purpose, the power quality disturbance method based on wavelet transform provided by the invention mainly comprises the following steps: firstly, wavelet transform multi-resolution analysis is carried out on the power quality disturbance signal and corresponding eigenvectors are obtained according to the analysis results; then, an LS-SVM classifier and multiple power quality disturbance classes are used to identify the eigenvectors and obtain the power quality disturbance classes corresponding to the eigenvectors, namely the power quality disturbance classes corresponding to the above power quality disturbance signals. Based on the above steps, the power quality disturbance identification method provided by the invention can effectively and quickly identify the power quality disturbance signal with non-stationary and / or short duration.

Description

technical field [0001] The invention relates to the technical field of power quality analysis, in particular to a method and device for identifying power quality disturbances based on wavelet transform. Background technique [0002] Power quality disturbance (PQD) will lead to serious consequences such as equipment overheating, motor stall, protection failure and inaccurate measurement, causing serious economic losses and social impact. The current analysis methods of power quality disturbance mainly include Fourier transform method, wavelet transform method, S transform method and Hilbert-Huang transform method, and the identification method of power quality disturbance mainly includes decision tree or neural network or support Power quality disturbance identification method based on vector machine. Specifically, the Fourier transform method is not suitable for the analysis of non-stationary signals, and the S-transform method cannot accurately judge disturbances such as v...

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): G06K9/00G06K9/62G01R31/00
CPCG01R31/00G06F2218/06G06F18/214G06F18/2411
Inventor 谭杰潘程王敏丽
Owner INST OF AUTOMATION CHINESE ACAD OF SCI
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