Overall traceable high-voltage electric energy meter calibrating device

Abstract

The invention discloses a high-voltage electric energy meter verification device that can be traced as a whole, mainly including a verification device control module and a three-phase standard power source; the verification device control module mainly includes an industrial computer, a user interface connected with the industrial computer, and a digital quantity Signal conversion board, pulse input and output board; the three-phase standard power source includes three single-phase standard power sources with the same structure and independent of each other, and the single-phase standard power source mainly includes a standard meter, a low-voltage signal source, a power amplifier, Current booster, booster, current transformer, voltage transformer, the output terminal of the current booster and the primary side of the current transformer form a current output loop, the secondary side of the current transformer is connected to the standard meter, the booster’s The output terminal is used as a voltage output terminal and is connected to the standard meter through a voltage transformer; the standard meter of each single-phase standard power meter is connected to the digital signal conversion board. The invention can verify the high-voltage electric energy meter as a whole, and the accuracy of the verification device can be traced as a whole.

Description

technical field [0001] The invention relates to the field of high-voltage electrical measurement, and relates to a verification and verification technology of electric equipment, in particular to a verification device for a high-voltage electric energy meter that can be traced as a whole. Background technique [0002] With the rapid development of the economy, the demand for electricity is increasing. Digitalization, informatization, and networking are the development directions of electric energy metering and power grid measurement and control technology. The income of electricity charges is the main business income of electric power enterprises, and the main basis for its accounting is realized through the electric energy billing device, and the high-voltage electric energy meter device is an important electric energy billing instrument, because the high-voltage electric energy meter metering unit is in On the high-voltage side, conventional low-voltage stealing methods ar...

AI Technical Summary

Problems solved by technology

Although this scheme can realize the overall verification of the high-voltage electric energy meter, the verification device cannot realize the overall traceability of the accuracy. The traceability of the standard value is traced back to the national electric energy benchmark (3×10 -5 )

In the state of high current, the internal resistance loss of the wire cannot be ignored, and the contact resistance is not the same every time the wire is connected, which will change the accuracy of the verification device itself, thus directly affecting the accuracy and legality of the verification results of the high-voltage electric energy meter

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