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A method of improving the measurement accuracy of smart electric meters

A technology for measurement accuracy and smart meters, applied in the direction of measuring electrical variables, measuring devices, instruments, etc., can solve problems such as high prices, achieve the effects of improving error accuracy, protecting user interests, and ensuring accuracy and fairness

Active Publication Date: 2018-05-15
HEXING ELECTRICAL
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AI Technical Summary

Problems solved by technology

[0002] As a terminal for measuring electric energy, smart electric energy meters are continuously put forward by power companies and electric power users to improve the accuracy. Manufacturers try to achieve it in different ways. Now the commonly used methods to improve accuracy are: choose a metering chip with a wider dynamic range or Use high-precision AD, but the price is more expensive

Method used

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  • A method of improving the measurement accuracy of smart electric meters
  • A method of improving the measurement accuracy of smart electric meters
  • A method of improving the measurement accuracy of smart electric meters

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Embodiment Construction

[0031] In this embodiment, a method for improving the measurement accuracy of a smart meter includes:

[0032] Divide the working temperature range of the meter from -40°C to +70°C into N1...Nm intervals, calculate the voltage compensation gain value Ugain and the voltage compensation gain value Igain according to the following formula, and update them in real time, so as to improve the measurement of voltage and current at different temperature points Accuracy, according to P=U*I, the power accuracy is also improved, and the measurement accuracy and power accuracy are consistent.

[0033] Ugain=Ugb±(Tx-Tn)*U;

[0034] Igain=Igb±(Tx-Tn)*I;

[0035] In the formula: Ugain is the voltage gain value after temperature compensation;

[0036] Igain is the current gain value after temperature compensation;

[0037] Ugb is the voltage gain value of the benchmark calibration point, and in this scheme, the benchmark is the voltage gain value at 25°C;

[0038] Igb is the current gain ...

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Abstract

The invention relates to a method for improving the measurement accuracy of an intelligent electric meter. The purpose is to provide a method for improving the measurement accuracy of the smart electric meter, which has a wide measurement range and low cost. Solution: Divide the working temperature range of the meter from ‑40°C to +70°C into N1...Nm intervals, calculate the voltage compensation gain value Ugain and the voltage compensation gain value Igain according to the following formula, and update them in real time, Ugain=Ugb±(Tx‑Tn) *U; Igain=Igb±(Tx-Tn)*I. The invention is used in the smart electric meter industry.

Description

technical field [0001] The invention relates to a method for improving the measurement accuracy of an intelligent electric energy meter, which is mainly used in the intelligent electric meter industry. Background technique [0002] As a terminal for measuring electric energy, smart electric energy meters are continuously put forward by power companies and electric power users to improve the accuracy. Manufacturers try to achieve it in different ways. Now the commonly used methods to improve accuracy are: choose a metering chip with a wider dynamic range or Use high-precision AD, but the price is more expensive. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for improving the measurement accuracy of the smart electric meter in view of the above existing problems, which has a wide measurement range and low cost. [0004] The technical solution adopted in the present invention is: a method for improving t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R22/00
Inventor 周良璋徐全伟范有张敏刘美飞
Owner HEXING ELECTRICAL
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