Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A method for analyzing harmonics and interharmonics of power grid based on sst transform

A harmonic analysis and harmonic technology, applied in the field of power grid harmonic and inter-harmonic analysis based on SST transformation, can solve the problem of not being able to separate harmonics and inter-harmonics well, and achieve high discrimination and accurate separation The effect of the result

Active Publication Date: 2017-06-20
XIAN UNIV OF TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a power grid harmonic and inter-harmonic analysis method based on SST transformation, which solves the problem in the prior art that the harmonics and inter-harmonics with closer frequencies cannot be well separated

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 method for analyzing harmonics and interharmonics of power grid based on sst transform
  • A method for analyzing harmonics and interharmonics of power grid based on sst transform
  • A method for analyzing harmonics and interharmonics of power grid based on sst transform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] In the present invention, a method for analyzing harmonics and interharmonics of a power grid based on SST transformation, the flow chart is as follows figure 1 As shown, the specific steps are as follows:

[0037] Step 1. Use transformers or Hall sensors or other sampling equipment to sample and discretize the signal of the power system to be detected, and obtain the discrete signal to be detected and send it to the central processing unit CPU (which can be DSP or FPGA or other processing chips);

[0038] Step 2, in the central processing unit, carry out SST transformation to the discrete signal to be detected obtained in step 1, and obtain matrix A;

[0039] The SST transform uses six mother wavelets corresponding to any one of gauss, morlet, mexican hat, complex mexican hat, bump, and hermitian hat.

[0040] For example, the time ...

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 discloses a power grid harmonic and inter-harmonic analysis method based on SST transformation, and the method comprises the following steps: 1, carrying out the sampling and discretization of a signal of a to-be-detected power system, obtaining a to-be-detected discrete signal, and transmitting the to-be-detected discrete signal to a central processor; 2, carrying out the SST transformation of the to-be-detected discrete signal obtained at step 1 in the central processor, and obtaining a matrix A; 3, carrying out the analysis of the matrix A obtained at step 2 through SST transformation, and obtaining the harmonic and inter-harmonic condition of the to-be-detected electric signal. The method employs the SST transformation, and can obtain a more precise separation result during the separation of complex mixed signals. The method can clearly recognize the weak high-order harmonics and inter-harmonics, and is higher in frequency recognition degree.

Description

technical field [0001] The invention belongs to the technical field of power system power quality, and in particular relates to a method for analyzing harmonics and interharmonics of a power grid based on SST transformation. Background technique [0002] my country's power grid is undergoing profound changes. The power sources in the new generation of power grids are diversified. Clean energy is gradually replacing fossil energy. Wind, solar and tidal renewable energy power generation is continuously connected to the power grid. The complex AC and DC power grid system with multiple sources and multiple transformations is It is one of the characteristics of the current power grid; the trend of power electronics in the power system is also becoming more and more obvious. These changes have brought reliability problems to the power grid, and the resulting power quality problems have attracted more and more attention from the power sector and power grid end users. [0003] Due t...

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 李宁满蔚仕
Owner XIAN UNIV OF TECH
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
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