On-site verification device and method of electric energy meter

Abstract

The invention discloses an electric energy meter field calibration device and method. The device comprises acquisition modules, wherein an electric energy acquisition module collects electric energy data by serially connecting to the electric grid where a tested electric energy meter is, and a temperature acquisition module is used for collecting the temperature data of the electric energy acquisition module; a temperature compensation execution module, wherein the temperature compensation execution module includes a heater and a thermal cycle device, and the heater is disposed on a heat conduction medium of the thermal cycle device; and a control module, wherein the control module includes a memory, the memory stores an error correction value, and the control module is communicatively connected to the acquisition modules and the temperature compensation execution module and is configured to control the heater to cooperate with the thermal cycle device according to the temperature dataoutput by the acquisition modules, so as to maintain the temperature of the electric energy acquisition module at the set temperature, obtain an error correction value from the memory, and calculatethe electric energy error of the tested electric energy meter. The electric energy meter field verification device and method provided by the invention can quickly and accurately complete the field verification of the smart electric energy meter.

Description

technical field [0001] The invention belongs to the technical field of on-site metering and detection of electric energy meters, and more specifically relates to an on-site verification device and method for electric energy meters. Background technique [0002] Electric energy is the most important physical quantity in electromagnetic measurement. The reliability and accuracy of electric energy measurement is directly related to the fairness and justice of trade settlement. However, because the accuracy of the on-site calibration device for electric energy meters is affected by the susceptible environment, the measurement results cannot be recognized. As a result, the current energy meter measurement supervision method still stays in the laboratory testing mode, which cannot meet the supervision needs of electric energy meters. [0003] At present, there are two ways and methods for on-site calibration of electric energy meters in China: one is to connect the measuring equip...

AI Technical Summary

Problems solved by technology

Among these two methods, the first one is on-line detection, which is very simple, and the second one can be regarded as moving the laboratory to the field. The measurement is relatively accurate, but it is cumbersome, and the power source is inconvenient to carry.

Both methods have their inherent problems: the first method cannot directly obtain the error of the electric energy meter, but can only be obtained by calculating the difference of electric energy, and the measurement is greatly disturbed by the power grid; the second method needs to remove the electric energy meter and use it again. On-site verification of standard devices is separated from the actual electrical environment, and power failure will bring economic losses to users

[0005] At present, the power companies of the State Grid have developed and used some portable electric energy meter on-site calibration devices, but most of these devices are engineering-level measuring instruments with low accuracy, and the parameters measured on site cannot be traced and measured. Therefore, it is necessary to provide a device and method for on-site verification of electric energy meters to solve the problem of lack of effective equipment for on-site verification of electric energy meters

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