Overall traceable high-voltage electric energy meter calibrating device

Abstract

An overall traceable high-voltage electric energy meter calibrating device disclosed by the present invention mainly comprises a calibrating device control module and a three-phase standard power source, the calibrating device control module mainly comprises an industrial control computer, a user interface connected with the industrial control computer, a digital signal converting board and a pulse input-output board, and the three-phase standard power source comprises three single-phase standard power sources which are mutually independent and of which the structures are same. Each single-phase standard power source mainly comprises a standard meter, a low-voltage signal source, a power amplifier, a strong current generator, a booster, a current transformer and a voltage transformer. Theoutput end of the strong current generator and the primary side of the current transformer form a current output loop, the secondary side of the current transformer is connected with the standard meter, the output end of the booster is used as a voltage output end and is connected with the standard meter via the voltage transformer, and the standard meters of each single-phase standard power source are all connected with the digital signal converting board mutually. According to the present invention, a high-voltage electric energy meter can be calibrated overall, and the precision of the calibrating device can be traced overall.

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

Images