Power source of three-phase watt-hour meter verification device based on ir46 standard

Abstract

The invention discloses a power source of a three-phase electric energy meter verification device based on the IR46 standard. Most of the verification devices for AC watt-hour meters currently used do not meet the IR46 test conditions, and cannot fully meet the testing needs of IR46 active watt-hour meters, especially the small current output accuracy and harmonic output. The invention includes a man-machine interface control unit, a three-phase signal source, a voltage power amplifier, a current power amplifier and an adjustable working power supply; the three-phase signal source includes a data processing unit, a first communication unit, and a voltage signal double D / A Conversion circuit, voltage analog conditioning circuit, current signal double D / A conversion circuit and current analog conditioning circuit. The invention improves the small current output performance and the output accuracy of waveforms such as various harmonics, square waves, and peak waves, and satisfies the performance test and function test requirements of the IR46 electric energy meter.

Description

technical field [0001] The invention belongs to the technical field of testing equipment for AC electric energy meters, in particular to a power source for a three-phase electric energy meter verification device based on the IR46 standard. Background technique [0002] At present, my country is actively promoting the transformation of IR46 standards. The new GB / T17215 series standards and the JJF1245 type evaluation outline for electric energy meters have been submitted for approval one after another. Various electric energy meter manufacturers are also actively developing IR46 related samples; according to the relevant standards and specifications for IR46 electric energy meters The interpretation of the IR46 active energy meter is quite different from the current state grid smart energy meter, such as the definition of the energy meter level, the current definition, the error test, and the submerged start test items. At the same time, a variety of harmonics, Waveform influen...

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Problems solved by technology

[0002] At present, my country is actively promoting the transformation of IR46 standards. The new GB / T17215 series standards and the JJF1245 type evaluation outline for electric energy meters have been submitted for approval one after another. Various electric energy meter manufacturers are also actively developing IR46 related samples; according to the relevant standards and specifications for IR46 electric energy meters The interpretation of the IR46 active energy meter is quite different from the current state grid smart energy meter, such as the definition of the energy meter level, the current definition, the error test, and the submerged start test items. At the same time, a variety of harmonics, Waveform influence test items such as square wave and peak wave

[0003] Most of the current AC energy meter verification devices do not meet the IR46 test conditions, and cannot fully meet the detection needs of IR46 active energy meters, especially the small current output accuracy and harmonic output.

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