Self-diagnosis method and system for electric energy meter measurement faults

Abstract

A method for self-inspection of electric energy meter metering faults. The MCU of the electric energy meter to be self-inspected intercepts the data frame returned to the acquisition system by other electric energy meters on the same power line, and compares the analyzed voltage data with the voltage collected by the metering chip of the electric energy meter to be self-inspected. The data is compared by self-inspection to determine whether the measurement of the energy meter to be self-inspected is abnormal or normal. When the measurement is abnormal, the metering chip of the energy meter to be self-inspected is reset and the measurement parameters are refreshed. Continue to sample the voltage data on the power line at intervals of Δt, and use the same method as above to complete the voltage data comparison of consecutive i moments in sequence; The meter measurement is normal; when the measurement of the electric energy meters to be self-inspected at i time is abnormal, the metering fault information flag is set, and the electricity collection system is actively reported. A self-test system is also disclosed. The method has low self-test cost and high accuracy.

Description

A method and system for self-checking faults of electric energy meter measurement technical field The present invention relates to the field of electric energy meter fault self-checking, in particular to a kind of electric energy meter measurement fault self-checking method and system system. Background technique [0002] The electric energy meter is used as a measuring instrument for electricity settlement, and its accuracy will directly affect the fairness, accuracy, Reliability is directly related to the vital interests of power supply companies and users. Once the metering failure of the electric energy meter occurs, it will lead to the settlement of electric energy Inaccurate, it is very prone to electricity disputes. At the same time, the electric energy meter measurement fault has the following characteristics: 1, the general electric energy meter checks the accuracy of the measurement error of the electric energy meter before the operation of the grid, and in...

AI Technical Summary

Problems solved by technology

If it is necessary to verify the accuracy of the measurement error during the operation process, the electric energy meter must be dismantled back to the metering center for verification with special verification equipment, which is time-consuming and labor-intensive, and affects the daily life of electricity users;

[0004] 2. If there is a measurement failure in the operation of the electric energy meter, it is usually difficult to find it in time. The feedback of the meter reading system to compare the power consumption data is wrong or the power maintenance personnel finds a measurement failure during on-site inspection.

When a metering failure is discovered, it has already caused serious impact;

[0005] 3. Serious metering faults are easy to be found, and minor metering faults are extremely difficult to detect, and will have serious impacts over time

In the above-mentioned method of self-inspection through two-way measurement, an additional one-way comparison measurement module is required. This method is costly and is usually limited by the size of the structural space

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