Three-phase combined electronic transformer distortion wave measurement characteristic verification device

Abstract

The present invention discloses a three-phase combination electronic transformer distortion wave metering characteristic calibration device. The current verification device cannot satisfy the calibration of the distortion wave metering characteristics of an electronic transformer. The device comprises a device power supply, a three-current waveform programmable power supply, a three-phase high-voltage strong current generator, a three-phase voltage waveform programmable power supply, a three-phase high-voltage voltage booster, an A-phase standard current transformer, a B-phase standard current transformer, a C-phase standard current transformer, a three-phase combination electronic transformer, an electronic load with monitoring, an A-phase standard voltage transformer, a B-phase standard voltage transformer, a C-phase standard voltage transformer, a three-phase combination electronic transformer error calculator and a three-phase combination electronic transformer distortion wave metering characteristic calibration control platform. The three-phase combination electronic transformer distortion wave metering characteristic calibration device can provide three-phase distortion wave voltage and three-phase distortion wave current, and the three-phase distortion wave current is located in a high voltage state so as to realize the verification of the three-phase combination electronic transformer distortion wave metering characteristics.

Description

technical field [0001] The invention belongs to the technical field of measurement characteristic verification of distortion wave of a transformer, and in particular relates to a measurement characteristic verification device of a three-phase combined type electronic transformer distortion wave. Background technique [0002] Due to the extensive use of power electronic nonlinear devices, the distortion of voltage and current waveforms in modern power grids is quite serious. The transformer converts high-voltage voltage and high-voltage large current into small analog signals or digital signals that can be directly measured, and is used for the calculation of fundamental wave and harmonic active power and reactive power. The distortion wave conversion accuracy of the transformer directly affects the accuracy of power measurement. Therefore, the verification of the measurement characteristics of the distortion wave of the transformer has practical significance for the electric...

AI Technical Summary

Problems solved by technology

The three-phase combined electronic transformer combines three separate electronic voltage transformers and three separate electronic current transformers. It has the advantages of complete functions, convenient wiring, and compact structure. It is a new generation of electronic transformers. The mainstream product of the transformer, but there is no verification device for the measurement characteristics of the distortion wave of the three-phase combined electronic transformer

[0003] Existing electronic transformer calibration devices generally only perform single-phase electronic transformers in independent single-phase electronic transformers or three-phase combined electronic transformers under the conditions of power frequency sine wave voltage and sine wave current wave. Calibration, these calibration devices cannot meet the verification of the measurement characteristics of the electronic transformer distortion wave, let alone the integrated measurement characteristics verification of the three-phase combined electronic transformer under the condition of the distortion wave, but only in the field operating conditions In the case of consistency, the real measurement characteristics of the three-phase combined electronic transformer can be investigated, such as the influence of the internal electric field distribution of the three-phase combined electronic transformer and the interaction between each electronic transformer on the accuracy

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