Error online self-correcting method and electric energy meter thereof
A self-correcting, electric energy meter technology, applied in the measurement of electrical variables, measuring devices, instruments, etc., can solve the problems of prolonging the life cycle of electric energy meters, accuracy deviation, etc., to ensure the accuracy and quality level, and solve the accuracy deviation. , to achieve the effect of remote online self-correction of errors
Pending Publication Date: 2021-04-09
JIANGSU LINYANG ENERGY CO LTD
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Problems solved by technology
The present invention better solves the problem of accuracy offset in the life cycle of the on-grid energy meter, realizes the remote online self-correction of the error of the e
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[0055] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0056] attached figure 1 It is the principle block diagram of the error self-correcting electric energy meter of the present invention. Its main working principle and process are as follows: the AC voltage of the power grid is converted into a mV level voltage signal by a resistor network and sent to the metering chip ADC pin VP / VN; The shunt is converted into a mV-level voltage signal and sent to the metering chip ADC pin IP / IN. The metering chip integrates a voltage channel high-precision and high-reliability reference current source and a current channel high-precision and high-reliability reference current source, and the software can control the reference current source to turn on or off the error self-correcting signal output. After the error self-correction function is turned on, the reference current source of the voltage channel outputs a spec...
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The invention discloses an error online self-correction method and an electric energy meter thereof. The method comprises the steps: injecting specific high-frequency signals into related positions of an electric energy meter metering and sampling hardware circuit, sampling and measuring the signals in a laboratory calibration environment and a field real load environment respectively, monitoring the change of a hardware circuit network transfer function of each sampling channel by comparing signal amplitude differences, further calculating and obtaining the gain correction values of each sampling channel, and achieving the error online self-correction. According to the invention, remote error on-line self-correction of the electric energy meter is realized, the meter is not dismounted without power failure, on-site processing is not needed, batch operation can be realized, high on-site problem processing cost is avoided, and the accuracy quality level of the on-line electric energy meter is guaranteed.
Description
technical field [0001] The invention relates to the technical field of smart electric meters, in particular to an error online self-correction method and electric energy meters thereof. Background technique [0002] With the full implementation of the national smart grid policy, smart meters as terminal equipment can be rapidly promoted and applied. For smart meters installed in residential, municipal and industrial environments, under the complex and various environmental stresses on site, as time goes by, the accuracy of some electric energy meters may shift and change, and billing errors may occur, resulting in customer complaints and economic dispute. [0003] The bad thing is that after the problem occurs, the power supply company needs to spend a lot of time and cost to solve this problem. Most of the on-site accuracy out-of-tolerance energy meters can only be disconnected from the power supply and taken back to the laboratory for recalibration, causing interference t...
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CPCG01R35/04
Inventor 周梅黄健花雷陈胜峰刘银虎
Owner JIANGSU LINYANG ENERGY CO LTD