On-the-spot tester for error of electric energy meter with external load of beam pumping unit

Abstract

The present invention provides a beam pumping unit external load electric energy meter error field tester, the beam pumping unit external load electric energy meter error field tester includes a control module, an execution module and a load module, the load module is connected to The control module measures the current signal of the load inside and outside the load module, and transmits the current signal to the control module, the execution module is connected to the control module and the load module, and the execution module is under the control of the control module, Control the switching operation of the external load, the control module controls the operation of the execution module, calculates the number of revolutions of the electric energy meter under test and the time it takes to run, and obtains the current signal when the external load is working, so as to measure the power of the external load power and electricity consumption. The beam pumping unit added load electric energy meter error on-site tester can detect the error of the beam pumping electric energy meter and the current transformer on the spot.

Description

technical field [0001] The invention relates to the field of electric energy meter calibration, in particular to an on-site error tester for electric energy meters with loads on beam pumping units. Background technique [0002] According to the Metrology Law of the People's Republic of China and the Electric Energy Meter Verification Regulations, the electric energy meter, as an important energy measurement unit of the country and enterprises, must be calibrated regularly in accordance with the regulations to ensure the integrity and normal operation of the metering device. The electric energy meter used as the electric measuring instrument of the pumping unit belongs to the type IV electric energy meter, and it is required to be calibrated every 2 to 3 years, and the current transformer is calibrated every 5 years. [0003] Due to the harsh on-site verification conditions of the electric energy meter and the particularity of the load of the upstream beam pumping unit, the c...

AI Technical Summary

Problems solved by technology

For the mechanical electric energy meter, since the electric energy meter will appear positive and negative during the stroke cycle of the pumping unit, although the electric energy meter actually only rotates once, the photoelectric sensor will be triggered due to the inversion of the dial. Three times, two turns more than the actual number of turns of the electric energy meter, causing the test to fail

For electronic watt-hour meters, the electric power curve of the pumping unit is an alternating curve with large numerical fluctuations, non-periodic and non-constant, so it will have a certain impact on the accuracy of the test result error

In short, due to the special nature of the load of the pumping unit, any of the existing on-site electric energy meter error testing methods and testing instruments cannot accurately measure the error of the electric energy meter of the pumping unit.

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