Electric energy meter harmonic test device and method thereof

Abstract

The invention provides an electric energy meter harmonic test device and a method thereof. The device comprises a three-phase program-controlled AC source, a current harmonic generator, a standard meter and an error calculator, wherein the three-phase program-controlled AC source, the current harmonic generator, the standard meter and the error calculator are connected in sequence. The method comprises the following steps: (1) the three-phase program-controlled AC source and the current harmonic generator generating desired parameters; (2) providing the desired parameters to a calibrated meter and the standard meter; (3) calculating error by comparing electric energy pulses of the calibrated meter and the standard meter; (4) comparing the error with an error of a power supply generating sine waves, and detecting the error influence quantity. The electric energy meter harmonic test device provided by the invention can effectively realize output of voltage, current higher harmonics, DC even harmonics, subharmonics and odd harmonics, and can switch among the DC even harmonics, subharmonics and odd harmonics, so that the device can carry out a plurality of harmonic tests by a single wiring operation.

Description

technical field [0001] The invention belongs to electric energy technology, and specifically relates to an electric energy meter harmonic test device and a method thereof. Background technique [0002] At present, due to the increase of a large number of non-linear electrical equipment, a large number of harmonics are generated in the power grid, and the harmonic problems brought to power electronic devices pose a potential threat to the safety, stability, and economic operation of the power system and have an impact on power metering. , which has a great impact on the operation of the surrounding power grid. The harmonics generated in the power system can be mainly divided into two categories: one is non-linear components containing semiconductors, such as various rectifiers, converters, AC-DC converters, frequency converters and other energy-saving and control power electronic equipment; The second is the use of arc and ferromagnetic nonlinear equipment, such as AC arc fu...

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Problems solved by technology

[0002] At present, due to the increase of a large number of non-linear electrical equipment, a large number of harmonics are generated in the power grid, and the harmonic problems brought to power electronic devices pose a potential threat to the safety, stability, and economic operation of the power system and have an impact on power metering. , which has a great impact on the operation of the surrounding power grid

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