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

Electric energy metering method based on Kaiser window FFT single peak interpolation

A technology of electric energy measurement and interpolation, applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problems of reduced accuracy of electric energy metering calculation, failure to consider comprehensive information of peak frequency points, and inability to accurately extract harmonic components, etc., to achieve high Effects on Accuracy of Energy Metering Calculations

Inactive Publication Date: 2017-06-09
GUIYANG POWER SUPPLY BUREAU OF GUIZHOU POWER GRID CO LTD +1
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, these existing algorithms still have the following problems: 1) Since the spectral performance of the window function is fixed, when the windowing interpolation correction algorithm is performed on the dynamic signal, the calculation accuracy is limited by the fixed sidelobe performance of the window function. As a result, the harmonic components in the measured signal cannot be accurately extracted due to the influence of spectrum leakage, thereby reducing the calculation accuracy of electric energy measurement; Poor; the bimodal interpolation algorithm does not fully utilize the spectral line information near the peak frequency point; the trimodal interpolation algorithm does not consider the comprehensive information of the symmetrical spectral lines around the peak frequency point; Meet higher requirements such as real-time electric energy measurement; 3) In the existing interpolation correction algorithm, there is a common problem of poor calculation accuracy of even-order harmonic electric energy

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
  • Electric energy metering method based on Kaiser window FFT single peak interpolation
  • Electric energy metering method based on Kaiser window FFT single peak interpolation
  • Electric energy metering method based on Kaiser window FFT single peak interpolation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0043] In the description of the present invention, it should be understood that the terms "first" and "second" are used for description purposes only, and should not be understood as indicating or implying relative importance.

[0044] These and other aspects of embodiments of the invention will become apparent with reference to the following description and drawings. In these descriptions and drawings, some specific implementations of the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited by this limit. On the contrary, the embodiments of the present invention include all changes...

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 an electric energy metering method based on a Kaiser window FFT single peak interpolation. The electric energy metering method comprises steps that based on Kaiser window FFT single peak interpolation modification formula, FFT frequency shift, and frequency spectrum of a window function Kaiser, amplitudes of maximum spectral lines and secondary maximum spectral lines on left sides and right sides of fundamental wave, harmonic wave, and interharmonic wave peak value frequency points are acquired, and by using a polynomial fitting formula, the general amplitude, phase, and frequency interpolation modification formula of the signal fundamental waves, the harmonic waves, and the interharmonic waves is acquired; according to the general amplitude, phase, and frequency interpolation modification formula, the amplitude parameters, the phase parameters, and the frequency parameters of the fundamental waves, the harmonic waves, and the interharmonic waves of measured voltage signals and measured current signals are calculated; fundamental wave electric energy, harmonic wave electric energy, interharmonic wave electric energy, and total electric energy are calculated. The electric energy metering method is advantageous in that according to a single peak interpolation modulation algorithm, by using flexibility of Kaiser window function shape parameters, interpolation modification of high precision harmonic wave parameters of dynamic signals is realized, and high electric energy metering and calculation accuracy is provided.

Description

technical field [0001] The invention relates to the field of electric energy metering of a power supply system and the field of digital electric energy metering, in particular to an electric energy metering method based on Kaiser window FFT single-peak interpolation. Background technique [0002] As more and more non-linear dynamic power loads such as electrified railways, rolling mills, electric arc furnaces, electric vehicle charging piles, hoists, smart home appliances, and elevators are put into use, a large number of power harmonics and intermittent harmonic. A large number of interference components such as power harmonics, inter-harmonics, DC attenuation, and voltage drops have caused distortion of the current and voltage waveforms of the power grid. The existence of these disturbances not only seriously affects the power quality of the power supply, endangers the safe and stable operation of the power supply system, and even leads to serious power accidents, resulti...

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): G01R22/00
CPCG01R22/00
Inventor 赵云斌王路王轶群陈璐姚磊李乐穆青青潘哲哲沈杨
Owner GUIYANG POWER SUPPLY BUREAU OF GUIZHOU POWER GRID 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