Device and method for testing influences, on metering errors of electric energy meters, of voltage flicker and temperature

Abstract

The invention provides a device and method for testing influences, on metering errors of electric energy meters, of voltage flicker and temperature. The device comprises a standard electric energy meter and a tested electric energy meter; a three-phase voltage line of a programmable power supply is connected with the voltage input ends of the standard electric energy meter and the tested electricenergy meter in parallel; a three-phase current line of the programmable power supply is connected with the current input ends of the standard electric energy meter and the tested electric energy meter in parallel; the output end of a voltage flicker signal generator is connected with the input ends of the standard electric energy meter and the tested electric energy meter; the output ends of thestandard electric energy meter and the tested electric energy meter are respectively connected with a PC; the output end of the programmable power supply is connected with the PC; and the PC is connected with a main control center. The device and method can solve the technical problems that along with the more and more complicated power grid operation environment, the practical operation conditions of the electric energy meters are under the combined action of a plurality of influences in most cases, and under dynamic change conditions, the existing electric energy meter certificate test devices do not accord with the practical conditions.

Description

technical field [0001] The invention relates to the field of electric energy measurement, in particular to a test device and method for the influence of voltage flicker and temperature on the measurement error of electric energy meters. Background technique [0002] With the country's vigorous promotion of smart grid construction, the power grid system is becoming more and more intelligent and complex. more and more. As an important terminal equipment for measuring electric energy, the electric energy meter is related to the fairness and impartiality of electric energy trade settlement in the electric power sector. Although the existing domestic and foreign electric energy meter measurement and verification standard system can guarantee the accuracy of electric energy meter measurement to a certain extent However, the existing standards only consider the measurement error of the electric energy meter under a single influence quantity when performing the measurement verifica...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a test device and method for the influence of voltage flicker and temperature on the measurement error of the electric energy meter, so as to solve the problem that the existing standard only considers the electric energy under a single influence quantity when performing measurement verification on the electric energy meter. Meter measurement error, and all considerations are steady-state conditions. At this time, the measurement error of the electric energy meter often meets the requirements of the verification standard. However, as the operating environment of the power grid becomes more and more complex, the actual operating conditions of the electric energy meter are often affected by multiple factors. Under the condition of dynamic change, the existing electric energy meter verification test device does not conform to the actual situation and other technical problems

Images