Calibration method for automatically compensating electric energy metering error of electric energy meter according to temperature

Abstract

The invention discloses a calibration method for automatically compensating an electric energy metering error of an electric energy meter according to temperature. The calibration method may timely compute a new power gain correcting register calibration value according to environment temperature and replaces an original power gain correcting register calibration value in a power gain correcting register so as to enable a low difference between the actual electric energy consumption of a user and the electric energy metering of the electric energy meter. A calibration device and a calibration method adaptive to the same are included. The calibration device comprises a temperature detecting sensor, a memory, a current signal sampling circuit, a voltage signal sampling circuit, a microprocessor, and an electric energy metering chip with a built-in power gain correcting register. The electric energy metering chip, the temperature detecting sensor, and the memory are connected with the microprocessor. The current signal sampling circuit and the voltage signal sampling circuit are connected with the electric energy metering chip. The calibration method is mainly used in electric energy meter automatic compensation calibration technology according to temperature variation.

Description

technical field [0001] The invention relates to the technical field of electric energy measurement error compensation of electric energy meters, in particular to a calibration method for automatically compensating electric energy measurement errors of electric energy meters according to temperature. Background technique [0002] An electric energy meter is an instrument used to measure electric energy consumption in a circuit. In the production of electric energy meters, the accuracy of electric energy measurement of electric energy meters is calibrated and inspected according to the normal temperature working environment with reference temperature of 20°C when the electric energy meters leave the factory, and the electric energy measurement accuracy of electric energy meters is related to the ambient temperature. Due to the influence of temperature changes in the actual use environment, the accuracy of electric energy measurement of the electric energy meter will have a rel...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the electric energy measurement accuracy of the existing electric energy meter is greatly affected by the change of the ambient temperature, which leads to the occurrence of the obtained electric energy metering data and the user's actual electric energy consumption when the electric energy meter is used in an environment with large temperature changes There is a large deviation in the electric energy consumption data, which affects the fairness of electric energy measurement. Provide a new calibration value of the power overflow correction register that can be calculated in time according to the ambient temperature to replace the original power in the power overflow correction register in the electric energy metering chip. The calibration value of the overflow correction register (the calibration value at the reference temperature at the factory), and then the energy metering chip collects the voltage signal and current signal, and the energy metering chip then uses this new calibration value of the power overflow correction register to compare the data collected by the energy metering chip. The received voltage signal and current signal are used to convert the electric energy signal, and the microprocessor collects the electric energy signal for electric energy accumulation, so that the actual electric energy consumption of the user and the electric energy measurement deviation of the electric energy meter are small, and the electric energy measurement error of the electric energy meter is automatically compensated according to the temperature. Calibration method

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