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Automatic compensation method for voltage change of electric energy meter

An automatic compensation and electric energy meter technology, which is applied in the field of electric energy meters, can solve the problems affecting the measurement accuracy, save manpower and time, improve the efficiency of meter calibration, and shorten the correction time

Active Publication Date: 2019-06-18
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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  • 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. Power-on initialization is performed to obtain an initialized power error calibration gain value and an initialized power offset calibration gain value; a rated voltage Un, the current lambdaIb and a power factor 1.0 are outputted by a programmable power source to a calibrated meter; the apparent power is automatically calculated by an MCU of the calibrated meter through obtaining the active power and the reactive power of the calibrated meter; a power error of the calibrated meter and a power error calibration gain value are calculated; a power offset calibration gain value is calculated; when errors between the active power and the standard active power and the reactive power and thestandard reactive power after calibration are within the permissible range, current and power factors are kept unchanged, output voltages of a programmed power source for the calibrated meter are sequentially changed, and different output voltages are utilized for meter calibration. The method is advantaged in that only the power error is calibrated, the method is suitable for metering small currents of the electric energy meter, metering accuracy of the electric energy meter is high, and meter calibration efficiency is improved.

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 Applications(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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