Power grid harmonic discrete signal Fourier optimization algorithm based on half-wave symmetry

A discrete Fourier, half-wave symmetric technology, applied in computing, complex mathematical operations, data processing applications, etc., can solve problems such as control signal errors, abnormal states, and complex calculations, reducing the amount of calculation in half and realizing discrete The effect of the Fourier transform function, the efficient discrete Fourier transform function

Pending Publication Date: 2022-07-01
YIBIN VOCATIONAL & TECH COLLEGE
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Problems solved by technology

In addition, for discrete signals with limited sampling points to perform discrete Fourier transform, generally the period is expanded in the time domain and then the discrete Fourier transform process is performed, and the discrete Fourier transform itself has complex calculations and many repeated calculations characteristics, which will eventually lead to a large error in the control signal, making the circuit run in an abnormal state

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  • Power grid harmonic discrete signal Fourier optimization algorithm based on half-wave symmetry
  • Power grid harmonic discrete signal Fourier optimization algorithm based on half-wave symmetry
  • Power grid harmonic discrete signal Fourier optimization algorithm based on half-wave symmetry

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[0035] In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0036] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeabl...

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Abstract

The invention discloses a power grid harmonic discrete signal Fourier optimization algorithm based on half-wave symmetry, and belongs to the technical field of discrete signal processing, and the algorithm comprises the steps: building a power grid waveform numerical model f (n) for a collected discrete power grid waveform signal; establishing a discrete Fourier transform model of the N-point sequence f (n) for the power grid waveform numerical model f (n); symmetrically solving the amplitude and harmonic number k of the discrete Fourier transform model of f (n) based on half-wave; the amplitude An and the phase theta n of the fundamental wave and the harmonic wave of the direct-current component A0 are solved, the expression of the power grid waveform is obtained, the algorithm is based on the half-wave symmetry thought, a butterfly unit for achieving Fourier basic operation is optimized, the calculated amount is halved, and the discrete Fourier transform function is efficiently achieved.

Description

technical field [0001] The invention relates to the technical field of discrete signal processing, in particular to a Fourier optimization algorithm of power grid harmonic discrete signals based on half-wave symmetry. Background technique [0002] The voltage signal collected by the (Analog to Digital Conversion, ADC) module of the microcomputer controller STM32F429IGT6 is a discrete signal, and the Fourier transform analysis of these discrete signals can obtain the amplitude, frequency, initial phase and other information of the input signal. Since these discrete signals are not a continuous process in the time domain and frequency domain, compared with the FT of continuous signals, although the steps of the two are the same, the models established in numerical processing are different, so the mathematical form is used. The continuous model used to analyze grid harmonics is inaccurate, and may even be wrong because it cannot match the hardware system, compromising the power...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/14G06Q50/06
CPCG06F17/142G06Q50/06
Inventor 代云中刘健洋张荣飞李美容曹志远
Owner YIBIN VOCATIONAL & TECH COLLEGE
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