Electric energy meter comprehensive tester

Abstract

The invention provides an electric energy meter comprehensive tester, which saves social resources, simplifies work links for staff of power supply departments, and improves working efficiency. The electric energy meter comprehensive tester comprises a slave machine and a host machine, wherein the slave machine comprises a remote control operational amplifier, a 16-bit multichannel ADC, a measurement core, a GPS module and a wireless module, the remote control operational amplifier, the 16-bit multichannel ADC and the measurement core are connected in sequence, and the GPS module and the wireless module communicate with the measurement core; and the host machine comprises an active compensation current transformer, an active compensation circuit, a 485-to-232 communication module, a man-machine interface industrial control computer and an error calculation unit, the active compensation current transformer and the active compensation circuit are connected with the remote control operational amplifier through a relay selection module, the measurement core communicates with the man-machine interface industrial control computer via the 485-to-232 communication module, output of the measurement core is connected with the error calculation unit, and the error calculation unit communicates with the man-machine interface industrial control computer via the 485-to-232 communication module.

Description

technical field [0001] The invention belongs to the technical field of electric energy testing in electric power systems, and in particular relates to an electric energy meter comprehensive tester. Background technique [0002] Electric energy meter field calibrator is already a relatively mature product on the market at present, and its application occasions are various substations and various power supply departments. In addition to using the electric energy meter field calibrator to calibrate the error of the electric energy meter, these departments also need an instrument to measure the secondary voltage drop of PT, and also need to measure the secondary load of PT and CT. However, these functions are not available in traditional on-site calibrator, and it is necessary to purchase a special PT secondary pressure drop meter for measurement. [0003] The function of the secondary voltage drop of the PT is to simultaneously measure the voltage on the secondary side of the ...

AI Technical Summary

Problems solved by technology

If two places use the same instrument for measurement, it is very simple to realize synchronous measurement. However, there is a certain distance between the PT secondary side and the input terminal of the electric energy meter (generally ranging from 200 meters to 800 meters), and the voltage can be directly pulled Difficulty measuring wires

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