Electric energy meter error automatic checking method and electric energy meter

A self-calibration technology for electric energy meters, applied in the direction of measuring electric variables, measuring devices, instruments, etc., can solve the problems of inability to guarantee the accuracy of electric energy meters, labor-intensive, and inability to find errors in electric energy meters in time

Pending Publication Date: 2017-04-19
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

This kind of on-site calibration method not only consumes manpower, but also cannot detect the error of the electric energy meter in time, and cannot guarantee the accuracy of the electric energy meter

Method used

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  • Electric energy meter error automatic checking method and electric energy meter
  • Electric energy meter error automatic checking method and electric energy meter

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Embodiment Construction

[0035] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, features and effects of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0036] preferred figure 1 Shown is the principle diagram of the method for self-checking the error of the electric energy meter according to the first embodiment of the present invention. See figure 1 , the energy meter of this embodiment includes: a sampling channel for collecting the voltage and current of each phase of the grid, a reference source circuit for outputting stable reference voltage and reference current, and a sampling channel for switching the connection between the sampling channel and the grid An electrically controlled selector switch connected to the reference source circuit. The reference source circuit is powered by the p...

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Abstract

The invention provides an electric energy meter error automatic checking method and an electric energy meter. The method comprises the following steps: an electric control selector switch receives a checking signal, and reference voltage and reference current output ends of a reference source circuit are connected with corresponding sampling channels; a metering chip carries out sampling on reference voltage and reference current to obtain a voltage sampling value A2 and a current sampling value B2; an MCU of the electric energy meter calculates a voltage difference value between the voltage sampling value A2 and a voltage preset value A1 as well as a current difference value between the current sampling value and a current preset value according to the voltage sampling value A2 and the current sampling value B2; the MCU compares the voltage difference value and voltage allowable deviation alpha as well as the current difference value and current allowable deviation beta to obtain comparison results; and the MCU obtains check results according to the comparison results: if the voltage difference value is smaller than or equal to the voltage allowable deviation and the current difference value is smaller than or equal to the current allowable deviation, the comparison result is that the electric energy meter is normal, and if the voltage difference value is larger than the voltage allowable deviation and / or the current difference value is larger than the voltage allowable deviation, the comparison result is that the electric energy meter is abnormal.

Description

technical field [0001] The invention relates to the technical field, in particular to an electric energy meter error self-checking method and an electric energy meter. Background technique [0002] The accurate measurement of electric energy is the guarantee for the safe and stable operation of the power system, as well as the guarantee for fair and just transactions between power supply companies and users, so it is necessary to ensure the accuracy of electric energy meters. Because the energy meter will inevitably have errors during operation, the power supply department needs to calibrate the energy meter. However, the current electric energy meter does not have the function of automatic error verification. The power supply department needs to use the electric energy meter calibrator to carry out on-site verification of the electric energy meter regularly or irregularly to ensure the accuracy of the electric energy meter measurement. The so-called on-site verification ref...

Claims

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Application Information

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IPC IPC(8): G01R35/04G01R22/10
CPCG01R22/10G01R35/04
Inventor 郜波姜洪浪罗冉冉段晓萌王晓东赵婷左嘉王爽江小强
Owner CHINA ELECTRIC POWER RES INST
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