High-precision harmonic analysis method of sampling data synchronization

A technology of sampling data and harmonic analysis, applied in spectrum analysis/Fourier analysis, etc., can solve problems such as harmonic analysis that cannot be applied to high precision, complex formula derivation and compensation calculation, and limitation of interpolation points

Inactive Publication Date: 2011-11-16
CHONGQING UNIV
View PDF5 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above synchronization method are: ① In the differential interpolation, the calculation of parameters such as the fundamental frequency and the amplitude of each harmonic is complicated, and the data in the previous signal period must be called during synchronization processing, so the minimum delay for parameter calculation greater than the fundamental period of the signal; ②During data interpolation, the sm

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
  • High-precision harmonic analysis method of sampling data synchronization
  • High-precision harmonic analysis method of sampling data synchronization
  • High-precision harmonic analysis method of sampling data synchronization

Examples

Experimental program
Comparison scheme
Effect test

example

[0065] The implementation example of the present invention is further described below, assuming that the grid signal model is:

[0066] x ( t ) = cos ( ω 0 t + π 4 ) + 0.5 cos ( 3 ω 0 t + π 3 ) + 0.3 cos ( 5 ω 0 t + π 6 ) + 0.1 cos ( 9 ω 0 t + π ...

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 high-precision harmonic analysis method of sampling data synchronization, which is suitable for the field of power grid harmonic analysis and can realize accuracy computation of frequency, amplitude and phase of a power grid signal. The technical scheme of the invention is as follows: 1, a quadratic polynomial reverse interpolation method for accurately determining a fundamental wave period ensures that the computing precision of the fundamental wave period is improved by 2 orders of magnitude (reaching 1.51*10<-7> percent); and 2, a radial primary function interpolation method used for synchronizing nonsynchronously-sampled data ensures that synchronization data errors subjected to radial primary function interpolation are improved by 3-4 orders of magnitude (reaching 1.1*10<-9> percent). The invention has the advantage that the computing precision of harmonic parameters (amplitude and phase) on the basis of synchronization data is improved by 4-5 orders of magnitude.

Description

technical field [0001] The invention relates to a high-precision harmonic analysis method for stable periodic signals, including a quadratic polynomial inverse interpolation method for accurately measuring the fundamental wave period, and a radial basis function interpolation method for synchronous processing of asynchronous sampling data. The invention belongs to the field of harmonic analysis of grid signals. Background technique [0002] In the field of electric energy metering, when calculating active and reactive power based on frequency domain power theory, accurate voltage and current harmonic amplitudes and phase relationships are required; in grid power quality monitoring, the harmonic distribution of voltage and current is also required situation; therefore, harmonic analysis is an important content in power grid signal research. The current harmonic analysis is mainly realized by sampling and digital processing of the power grid signal. Considering the asynchrono...

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): G01R23/16
Inventor 张淮清付志红侯兴哲李春燕张谦
Owner CHONGQING UNIV
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