Three phase harmonic standard electric energy meter

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 transportation, metallurgy, chemical industry and other heavy industries and electrified railways, the factors affecting power quality are becoming more and more complicated, the main one is power harmonics. The impact and harmonics generated by these nonlinear loads on the power grid not only pose a great hazard to the stable and safe operation of power system equipment and the power grid, but also affect the rationality and fairness of traditional meters for electric energy measurement. Therefore, the high-precision multi-function electric energy meter with harmonic monitoring and measurement has become a new generation of electric energy metering products that have been promoted and applied by the power sector in recent years, and it has also provided the power sector with certain means an...

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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