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Harmonic and inter-harmonic angle calibration method and system based on fundamental wave angle calibration

A calibration method and harmonic technology, applied in measuring devices, instruments, spectrum analysis/Fourier analysis, etc.

Pending Publication Date: 2021-12-21
NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, when the common harmonic and inter-harmonic measurement devices perform calculations, only the amplitude error caused by hardware filtering is compensated.

Method used

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  • Harmonic and inter-harmonic angle calibration method and system based on fundamental wave angle calibration
  • Harmonic and inter-harmonic angle calibration method and system based on fundamental wave angle calibration
  • Harmonic and inter-harmonic angle calibration method and system based on fundamental wave angle calibration

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A harmonic and inter-harmonic angle calibration method based on fundamental wave angle calibration, including: collecting specified analog signals of voltage and current; converting the collected analog signals of voltage and current into digital signals; The angle difference between the digital signals due to the hardware delay is calibrated to obtain the fundamental angle correction value; according to the fundamental angle correction value, the angle correction value of the harmonic and inter-harmonic is calculated, which is used to correct the The angle difference between harmonics and inter-harmonics generated by hardware delay is calibrated.

[0028] like figure 1 As shown, this embodiment is deployed in the harmonic and inter-harmonic measuring device of the power system, and the voltage and current sampling rate of the harmonic and inter-harmonic measuring device is 12800 Hz; this embodiment realizes the basic Wave angle calibration.

[0029] Both the synchrop...

Embodiment 2

[0054] Based on the harmonic and inter-harmonic angle calibration method based on fundamental wave angle calibration described in Embodiment 1, this embodiment provides a harmonic and inter-harmonic angle calibration system based on fundamental wave angle calibration, including:

[0055] The first module is used to collect analog signals of specified voltage and current;

[0056] The second module is used to convert the analog signals of the collected voltage and current into digital signals;

[0057] The third module is used to calibrate the fundamental angle of the angle difference between the analog signal and the corresponding digital signal due to the hardware delay, and obtain the fundamental angle correction value;

[0058] The fourth module is used to calculate angle correction values ​​of harmonics and inter-harmonics according to the correction value of fundamental wave angles, and is used for calibrating the angles of harmonics and inter-harmonics.

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Abstract

The invention discloses a harmonic and inter-harmonic angle calibration method and system based on fundamental wave angle calibration in the technical field of power data measurement. The method comprises the following steps: collecting analog signals of the specified voltage and current; converting the collected analog signals of the voltage and the current into digital signals; performing fundamental wave angle calibration on an angle difference generated between the analog signal and the corresponding digital signal due to hardware delay to obtain a fundamental wave angle correction value; according to the fundamental wave angle correction value, obtaining angle correction values of harmonic waves and inter-harmonic waves through calculation, wherein the angle correction values are used for calibrating the angle difference of the harmonic waves and the inter-harmonic waves generated by hardware delay. The purpose of calibrating the harmonic wave and inter-harmonic wave angle difference generated by hardware time delay is achieved.

Description

technical field [0001] The invention belongs to the technical field of power data measurement, and in particular relates to a method and system for calibrating the angles of harmonics and interharmonics based on fundamental wave angle calibration. Background technique [0002] Due to the pressure of environmental pollution and concerns about the depletion of fossil energy, new energy has been vigorously developed. This has resulted in the widespread application of power electronic devices in power systems, resulting in harmonic and interharmonic pollution. The monitoring of harmonics and inter-harmonics becomes particularly important. At present, when the common harmonic and inter-harmonic measurement devices perform calculations, only the amplitude error caused by hardware filtering is compensated. Contents of the invention [0003] In order to solve the deficiencies in the prior art, the present invention provides a harmonic and inter-harmonic angle calibration method ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R23/16G01R35/00
CPCG01R23/16G01R35/005
Inventor 李培宜孙攀陈贻骜
Owner NANJING GUODIAN NANZI POWER GRID AUTOMATION CO LTD
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