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Three phase harmonic standard electric energy meter

A standard electric energy meter, harmonic technology, applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problem of harmonic energy meter calibration and traceability, etc., to achieve convenient man-machine interface, strong reliability and safety , the effect of simple operation

Active Publication Date: 2011-03-30
NINGBO WEIJI ELECTRIC POWER TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the power sector needs to use a large number of harmonic energy meters, and the standard energy meters currently used by domestic power testing departments, metering departments, and production companies cannot calibrate and trace the source of harmonic energy meters, there is an urgent need for corresponding high-level harmonics. The standard electric energy meter verifies and calibrates it

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  • Three phase harmonic standard electric energy meter
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Embodiment Construction

[0013] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0014] Reference figure 1 , A three-phase harmonic standard electric energy meter, comprising a harmonic electric energy metering module 1. The harmonic electric energy metering module 1 includes an input AC voltage of different amplitudes that can be converted into an AC acceptable by an analog-to-digital converter. A voltage conversion unit 2 for a small voltage signal, a current conversion unit 3 for converting input AC currents of different amplitudes into a small AC voltage signal that can be accepted by the analog-to-digital converter, and the voltage conversion unit 2 is compatible with the analog voltage The first ADC conversion unit 4 that converts a signal into a digital signal is connected, and the current conversion unit 3 is connected to a second ADC conversion unit 5 that converts an analog voltage signal into a digital signal; the harmon...

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Abstract

A triphase harmonic standard electric energy meter comprises a harmonic electric energy measuring module which comprises a voltage conversion unit and a current conversion unit, wherein, the voltage conversion unit is connected with a first ADC conversion unit, the current conversion unit is connected with a second ADC conversion unit; the harmonic electric energy measuring module also comprises a DSP computing module which comprises an FFT conversion module used for computing the amplitude value and the phase position value of the harmonic output by the FFT conversion module so as to obtain a amplitude value phase position compensation module of each harmonic parameter. The triphase harmonic standard electric energy meter also comprises a communication module used for the communication of the harmonic electric energy measuring module with the outside, the communication module is connected with a display screen and a human-computer interaction module and comprises an RS232 interface used for being connected with the external control equipment. The invention provides a triphase harmonic standard electric energy meter used for carrying out calibration and detection to the harmonic electric energy meter.

Description

(1) Technical field [0001] The invention relates to a three-phase harmonic standard electric energy meter. (2) Background technology [0002] With the development of modern industry and heavy industries such as transportation, metallurgy, chemical industry, and electrified railways, the factors affecting power quality are becoming more and more complex, and the main one is power harmonics. The impact and harmonics caused by these nonlinear loads on the power grid not only cause great harm to the stable and safe operation of power system equipment and power grid, but also affect the rationality and fairness of traditional meters for electric energy measurement. Therefore, the high-precision multifunctional electric energy meter with harmonic monitoring and measurement has become a new generation of electric energy metering products that the electric power sector has focused on in recent years, and it also provides the power sector with a certain means and basis for real-time monit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/04G01R23/16
Inventor 吴伟宗
Owner NINGBO WEIJI ELECTRIC POWER TECH
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