Electric meter calibrating method and automatic calibrating system

Abstract

The invention is applicable to the electric power field and provides an electric meter calibrating method and an automatic calibrating system. The method comprises the steps that preset voltages and currents are controlled to be exerted on an electric meter calibrating station, and self-inspection of an electric meter to be calibrated is carried out under the stable voltages and currents; voltage values and current values of a standard electric meter and voltage values and current values of the electric meter to be calibrated are automatically read, and voltage deviation values and current deviation values are compared and calculated, and a command is sent to the electric meter to be calibrated for adjusting an electric meter compensation factor according to the voltage deviation values and the current deviation values when the voltage deviation values and the current deviation values are not within accuracy ranges; a corresponding preset current load angle is controlled to be exerted on the electric meter calibrating station according to a preset test point, the current power of the standard electric meter is obtained, meanwhile, the power of the electric meter to be calibrated is read for comparison, power deviation values are figured out, and a compensation factor is sent for adjusting the electric meter to be calibrated when the power deviation values are not within an accuracy range. Thus, the calibration of multiple electric meters can be automatically completed at a time through the electric meter calibrating station, extra manual intervention is not required, and efficiency is improved.

Description

[0001] technical field [0002] The invention belongs to the field of electric power, in particular to an electric meter calibration method and an automatic calibration system. [0003] Background technique [0004] After the meter is assembled, there are certain errors in the voltage, current and power, which need to be compensated by adjusting the relevant parameters of the metering chip to ensure the accuracy of the output voltage, current and power values. [0005] The existing method is to manually check the display values ​​of standard meters and error detectors to judge whether there is a deviation between the meter value and the standard value one by one. If there is a deviation, send a command to the meter that does not meet the requirements through RS485 communication to compensate. [0006] The existing meter calibration method requires too much manual intervention, resulting in low efficiency and a large error rate. At the same time, one or two people are re...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for calibrating electric meters, which aims to solve the problems that the existing electric meter calibration methods require too much manual intervention, resulting in low efficiency and high error rate

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