Laboratory recurrence-type digital electric energy metering equipment remote calibration system and method

Abstract

The invention relates to a laboratory recurrence-type digital electric energy metering equipment remote calibration system and method. The system comprises a laboratory host computer, a standard digital electric energy meter, a digital arbitrary waveform generator, an electric energy metering assembly, a digital oscilloscope, a merging unit and a clock synchronization device. The laboratory host computer, the standard digital electric energy meter and the digital arbitrary waveform generator are arranged in a calibration laboratory. The laboratory host computer, the standard digital electric energy meter, the digital arbitrary waveform generator, the electric energy metering assembly, the digital oscilloscope, the merging unit and tested digital electric energy metering equipment are connected in order. The clock synchronization device is connected with the digital oscilloscope, the merging unit and the tested digital electric energy metering equipment. The electric energy metering assembly is connected with the tested digital electric energy metering equipment and the laboratory host computer. Compared to the prior art, the invention achieves reliable remote calibration of electric energy metering errors, and improves the reliability of a digital metering system.

Description

technical field [0001] The invention relates to a calibration device and method for an electric energy metering device, in particular to a remote calibration system and method for a laboratory recurring digital electric energy metering device. Background technique [0002] The accuracy of electric energy measurement is related to the correct calculation of various electric power technical and economic indicators and the accuracy and fairness of electric power settlement, involving the interests of power generation, transmission, distribution, and users. The power settlement gateway is undertaken by the substation. Traditional substation electric energy metering equipment consists of voltage and current transformers, metering secondary circuits, electric energy meters and metering cabinets, and transmits analog quantities such as current and voltage through cables. [0003] Remote calibration is a remote calibration operation using information networks and communication netw...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a remote calibration system and method for laboratory reproducible digital electric energy metering equipment in order to overcome the above-mentioned defects in the prior art, and to solve the problem that the current new generation of intelligent substations include digital electric energy meters and integrated devices for maintenance and measurement. The problem that various digital metering equipment including multi-function measurement and control devices cannot be remotely calibrated under working conditions, on the basis of ensuring the normal operation of substation protection and automation functions, realizes remote calibration of electric energy metering errors and improves the performance of digital metering systems reliability level

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