A method for checking the state of a metering device

Abstract

The invention discloses a metering device state inspection method which is high in efficiency and comprehensive and accurate in inspection result. The method collects basic information data of a metering device and collects actual operating data of the metering device in real time, classifies the collected data and calculates an electric energy meter operating state value GS, a current transformer operating state value GC, a voltage transformer operating state value GP and a secondary loop operating state value GD, finally calculates an operating state value G of the whole metering device, and determines an actual operating state corresponding to an actual state value of the metering device through a corresponding relation between preset metering device state values and operating states. The inspection method is high in efficient, a fault of equipment which is in normal operation originally does not occur due to human factors, comprehensive inspection of the state of the metering device can be realized, and an inspection result that is finally obtained is guaranteed to be accurate, comprehensive and highly reliable. The method is suitable for popularization and application in the technical field of gateway metering device state evaluation.

Description

technical field [0001] The invention relates to the technical field of status evaluation of gate metering equipment, in particular to a method for checking the status of a metering device. Background technique [0002] In order to ensure the normal operation of the electric energy metering device and the reliability of the metering data, it is usually necessary to remotely estimate the operating status of the electric energy metering device. A large number of manual on-site inspections and complex calculation processes lead to low work efficiency; secondly, when manually testing the on-site accuracy of electric energy meters, it is necessary to connect the current loop of the tested meter in series with the standard meter, and connect the voltage loop with the standard meter in parallel. Perform operations such as loosening and tightening the terminals on the metering screen. After many times, the terminals often become loose or slipped, which leads to the failure of the equ...

AI Technical Summary

Problems solved by technology

[0002] In order to ensure the normal operation of the electric energy metering device and the reliability of the metering data, it is usually necessary to remotely estimate the operating status of the electric energy metering device. A large number of manual on-site inspections and complex calculation processes lead to low work efficiency; secondly, when manually testing the on-site accuracy of electric energy meters, it is necessary to connect the current loop of the tested meter in series with the standard meter, and connect the voltage loop with the standard meter in parallel. Perform operations such as loosening and tightening the terminals on the metering screen. After many times, the terminals often become loose or slipped, which leads to the failure of the equipment that was normally running, and there is a large potential failure; moreover, manual When inspecting the accuracy of the electric energy meter on site, there are certain requirements for the load of the secondary circuit, that is, the active power must be greater than 10W, and the power factor must be greater than 0.5. Once the load or power factor is too low, the inspection work cannot be carried out, resulting in the failure of the inspection work to be carried out smoothly. ;In addition, the metering device includes the electric energy meter, PT and CT and its secondary circuit, any link of which will affect the accuracy of the metering, the existing state inspection method of the metering device only pays attention to the detection of the accuracy of the electric energy meter and the correctness of the wiring , and the detection of the transformer and its secondary circuit is often ignored, and the impact of this part of the fault sometimes reaches dozens of times the error of the electric energy meter. For example, the actual secondary load of the PT is below 10%, while the design and test The range is 25% to 100%, the actual error may exceed the limit value, and the comprehensive inspection of the metering device status cannot be realized, resulting in inaccurate final inspection results, and manual intervention is prone to errors, resulting in low reliability and inaccurate inspection results Grasp the dynamic safety and stability of electric energy metering devices, and then cannot guarantee the safe, stable and accurate operation of all major metering devices, lack of dynamic tracking and analysis of accident handling information, and cannot dynamically control serious faults

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