An Automatic Compensation Method for Voltage Change of Electric Energy Meter

An automatic compensation and electric energy meter technology, applied in the field of electric energy meters, can solve problems such as affecting the measurement accuracy, and achieve the effects of saving manpower and time, improving the efficiency of meter calibration, and high measurement accuracy.

Active Publication Date: 2022-04-26
NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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Problems solved by technology

This meter calibration method needs to calibrate the phase value, which will affect the measurement accuracy when measuring small currents

Method used

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  • An Automatic Compensation Method for Voltage Change of Electric Energy Meter

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0031] Such as figure 1 As shown, an automatic compensation method for voltage changes of an electric energy meter includes the following steps:

[0032] Step 1. Power-on initialization: the host computer controls the voltage and current of the standard point output by the program-controlled power source to the calibrated meter, and debugs the calibrated meter to obtain the initialized power error correction gain value PGAIN0 and the initialized power offset correction gain value BS0, and write the initialized power error correction gain value PGAIN0 into the power gain correction register of the metering chip, and write the initialized power bias correction gain value BS0 into the active power bias correction register;

[0033] In this embodiment, the standard points are: rated voltage Un, current Ib, and power factor PF=1.0; rated voltage U...

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Abstract

The invention relates to an automatic compensation method for voltage change of an electric energy meter, which is initialized after power-on to obtain an initialized power error correction gain value and an initialized power offset correction gain value; a programmed power source outputs rated voltage Un and current λIb to the meter to be calibrated , power factor 1.0; the MCU to be calibrated automatically calculates the apparent power by obtaining the active power and reactive power of the calibrated meter; calculates the power error and power error correction gain value of the calibrated meter; calculates the power offset correction gain value; when the errors between the corrected active power, standard active power and reactive power, and standard reactive power are all within the allowable range, keep the current and power factor unchanged, and change the programmed power source to the Calibrate the output voltage of the meter, use different output voltages to calibrate the meter. It only needs to correct the power error, and it is suitable for the measurement of the electric energy meter when the current is small. The electric energy meter has high measurement accuracy and improves the meter calibration efficiency.

Description

technical field [0001] The invention relates to the field of electric energy meters, in particular to an automatic compensation method for voltage changes of the electric energy meter. Background technique [0002] Each electric energy meter needs to be calibrated before leaving the factory, so that the electric energy meter after leaving the factory can meet the corresponding measurement accuracy requirements, and the electric energy meter often has inaccurate measurement due to the limitation of the working range of the metering chip when measuring small currents. phenomenon, and due to the different voltages, it will have a certain impact on the measurement of the electric energy meter. Therefore, the current electric energy meters are manually compensated through voltage points and currents one by one before leaving the factory. For manufacturers who produce electric energy meters in large quantities, this compensation method is time-consuming and laborious. [0003] A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/04
Inventor 余挺王道安胡钱波毛犇杨建明周冉冉张腾飞高鹏强赖济民毛生辉徐颖颖裘旦娜金海波童赳健王圆王凯秦争营丁小燕刘志成
Owner NINGBO SANXING MEDICAL & ELECTRIC CO LTD
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