Method for calibrating metering precision of electric energy meter
A technology of measurement accuracy and electric energy meter, which is applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve the problems of large measurement errors, achieve obvious effects, simple operation, and ensure the effect of measurement deviation
Pending Publication Date: 2022-03-01
XIAN LIANGLI INSTR & METER
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[0003] The traditional energy meter calibration method is generally to calibrate the reference voltage. This method can only ensure that the energy meter has a high accuracy near the reference voltage range, and there is a relatively large measurement error in the case of a large voltage range.
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[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the drawings and embodiments; in the drawings or descriptions, similar or identical parts use the same symbols, and in actual In application, the shape, thickness or height of each part can be enlarged or reduced. The various embodiments listed in the present invention are only used to illustrate the present invention, and are not intended to limit the scope of the present invention. Any obvious modifications or changes made to the present invention do not depart from the spirit and scope of the present invention.
[0020] A method for calibrating the measurement accuracy of an electric energy meter, comprising the following steps:
[0021] Step S1 sampling, according to the actual reference voltage, combined with the measurement range, select N sampling points to take the voltage, and obtai...
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The invention discloses a method for calibrating the metering precision of an electric energy meter, and relates to the technical field of power equipment, and the method comprises the following steps: S1, sampling: selecting N sampling points to collect voltages according to an actual reference voltage and a metering range, and obtaining sampling data; s2, processing: filtering the sampled data to eliminate errors caused by interference; s3, calculating: calculating the sampled data to obtain an optimal fitting curve; s4, verification: verifying a linear expression of the fitted curve, extracting part of measurement points, substituting the measurement points into calculation, and checking whether the measurement points meet specified requirements or not; if the requirements are met, the calibration is completed, and if the requirements are not met, sampling points are added on the basis of the previous sampling points for recalculation, and finally a sampling curve meeting the conditions is obtained. The method is simple to operate and obvious in effect, can be realized only through software processing, and does not introduce new cost.
Description
technical field [0001] The invention relates to the technical field of electric equipment, in particular to a method for calibrating the measurement accuracy of an electric energy meter. Background technique [0002] An electric energy meter is an instrument used to measure electric energy, also known as an electric meter, a fire meter, or a kilowatt-hour meter, and refers to an instrument for measuring various electrical quantities. In order to improve the accuracy of the results of detecting electric energy, the electric energy meter needs to be calibrated before leaving the factory to correct the errors of the peripheral circuits and sampling components. [0003] The traditional energy meter calibration method is generally to calibrate the reference voltage. This method can only ensure that the energy meter has a high accuracy near the reference voltage range, and there is a relatively large measurement error in the case of a large voltage range. Contents of the inventi...
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IPC IPC(8): G01R35/04
CPCG01R35/04
Inventor 张岩王国栋许园园丁威王强齐巧丽刘力
Owner XIAN LIANGLI INSTR & METER