Method for improving metering precision of intelligent ammeter

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, ensuring accuracy and fairness, and protecting user interests

Active Publication Date: 2016-01-06
HEXING ELECTRICAL
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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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  • Method for improving metering precision of intelligent ammeter
  • Method for improving metering precision of intelligent ammeter
  • Method for improving metering precision of intelligent ammeter

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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 metering precision of an intelligent ammeter, for the purpose of providing a method for improving metering precision of an intelligent ammeter. The method has the advantages of wide metering range and low cost. The scheme is as follows: the work temperature scope -40 DEG C to +70 DEG C of the ammeter is divided into 1, ... Nm intervals, and a voltage compensation gain value Ugain and a voltage compensation gain value Igain are calculated according to the formulas Ugain=Ugb+/-(Tx-Tn)*U and Igain=Igb+/-(Tx-Tn)*I and updated in real time. The method provided by the invention is applied to the field of an intelligent ammeter.

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 Applications(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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