An operation condition examination method for a metering device

Abstract

The invention discloses an operation condition examination method for a metering device. The method is highly efficient and can provide comprehensive and accurate examination results. The examination method determines a practical operation state corresponding to an practical operation condition value of the metering device through calculating an operation condition value R1 of a current transformer, an operation condition value RU of a voltage transformer, an operation condition value RM of an electric energy meter and finally through calculating an operation condition value R of the whole metering device and according to a corresponding relation between a preset operation condition value and an operation state of the metering device. According to the examination method, the operation state of the metering device is obtained through analysis of data; on-site examination by humans is not needed; the efficiency is high; the examination method takes into consideration of examination of operation conditions of the electric energy meter, the current transformer and the voltage transformer so as to realize comprehensive examination of the operation condition of the metering device and ensure that the finally obtained operation condition examination result is accurate and comprehensive and high in reliability. The operation condition examination method is suitable for being promoted and applied in the technical field of gateway metering equipment state assessment.

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 operating conditions 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 conditions of the electric energy metering device. The method requires a lot of manual on-site inspection and complex calculation process, and the work efficiency is low; secondly, when manually testing the on-site accuracy of the electric energy meter, it is necessary to connect the current loop of the tested meter in series with the standard meter, and the voltage loop with the standard meter. Parallel connection requires operations such as loosening and tightening the terminals on the metering screen. After many times, the terminals often become loose or slipped, whi...

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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 conditions of the electric energy metering device. The method requires a lot of manual on-site inspection and complex calculation process, and the work efficiency is low; secondly, when manually testing the on-site accuracy of the electric energy meter, it is necessary to connect the current loop of the tested meter in series with the standard meter, and the voltage loop with the standard meter. Parallel connection requires 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 failure of the equipment that was originally operating normally, and there is a large potential failure; For those who manually inspect the accuracy of the electric energy meter on the spot, 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 inspection work. It cannot be carried out smoothly; in addition, the metering device includes the electric energy meter, PT and CT and its secondary circuit, any of which will affect the accuracy of the metering, and the existing inspection methods for the operating conditions of the metering device only pay attention to the operating conditions of the electric energy meter The detection of the operating conditions of voltage transformers and current transformers is often neglected, and the impact of this part of the fault sometimes reaches dozens of times the error of the electric energy meter, and a comprehensive inspection of the operating conditions of the metering device cannot be realized , leading to inaccurate test results of the final operating conditions, and manual intervention is prone to errors, resulting in low reliability of the test results, unable to accurately grasp the dynamic safety and stability of the operating conditions of the electric energy metering device, and thus unable to guarantee the safety of the main metering devices , stable and accurate operation, lack of dynamic tracking and analysis of accident handling information, and cannot dynamically control serious faults

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