Remote pulse module for on-site calibration of electric energy meter and calibration method thereof

Abstract

The invention relates to the technical field of field calibration of metering devices and particularly relates to a remote pulse module for the on-site calibration of an electric energy meter and a calibration method thereof. The remote pulse module comprises a pulse collector and a pulse restorer. The pulse collector is arranged at the electric energy meter. The pulse restorer is arranged at a calibration instrument. T he pulse collector and the pulse restorer carry out the signal interaction in the wireless communication mode. The calibration method comprises the steps of collecting active pulses and reactive pulses by the pulse collector; encoding the pulses and then transmitting the pulses to the pulse restorer by the pulse collector; restoring the pulses into active pulse signals and reactive pulse signals by the pulse restorer; transmitting the active pulse signals and the reactive pulse signals to the calibration instrument; and calculating the comprehensive error of the electric energy meter and a secondary loop.

Description

technical field [0001] The invention relates to the technical field of on-site calibration of metering devices, in particular to a remote pulse module for on-site calibration of electric energy meters and a calibration method thereof. Background technique [0002] On-site verification of electric energy meters is divided into initial verification and periodic verification, which is a technical means to ensure safe, accurate and stable operation of electric energy metering devices. At present, in the field of high-voltage metering devices, the metering device is composed of voltage transformers, current transformers, electric energy meters and secondary circuits; voltage and current transformers convert high voltage into low voltage signals, and large currents into small current signals to transmit electric energy The energy meter calculates the value of the energy used according to the voltage and current. On-site calibration of the electric energy meter is to connect the l...

AI Technical Summary

Problems solved by technology

The former connection method is easy to introduce the error of the secondary voltage and current signal connection line to the calibration instrument, and the latter connection method is easy to introduce signal interference to the calibration instrument

Both cases will cause calibration distortion, and the wiring is time-consuming and labor-intensive, prone to mistakes and even cause safety problems when the voltage and current lines are connected externally

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