Calibrations of phase and ratio errors of current and voltage channels of energy meter

7th Sensors & their Applications

Mlejnek, P.^1 ; Kaspar, P.^2

Czech Technical University in Prague, University Centre for Energy Efficient Buildings, Nam. Sitna 3105, 272 01 Kladno, Czech Republic^1

Czech Technical University in Prague, Faculty of Electrical Engineering, Technicka 2, 166 27 Prague 6, Czech Republic^2

关键词: Calibration constants;    Digitally controlled;    Electric energy quality;    Error measurements;    Interesting information;    Power calculation;    Power quality analyzer;    Wide frequency range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/450/1/012046/pdf
DOI  :  10.1088/1742-6596/450/1/012046

来源: IOP

【 摘 要 】

This paper deals with measurement of phase and ratio errors of current and voltage channels of a new produced energy meter. This fully digitally controlled energy meter combines the classical static energy meter with power quality analyzer. The calibration of phase and ratio errors in wide frequency range is then necessary. Paper shows the results of error measurement, introduces the mathematical approximations and describes the calibration constants. It allows error compensation and power calculation of particular harmonics. The electric power of the higher harmonics can be interesting information of distributed electric energy quality.