ACCURATE DIGITAL THREE-PHASE ELECTRICITY METER AND GENERATOR

Branislav Lojko, Jan Hribik, Peter Fuchs, Miloslav Hruskovic

Abstract

Accurate measurement of parameters of a power network is now possible by digital methods. The description of the proposed and realized instrument based on the digital sampling method is given. It can measure basic parameters of the three-phase power network such as rms values of voltages and currents, powers, energies, power factors, the network frequency and frequency spectra. Its accuracy is better than 0.05%. The instrument can be also used as a generator of three-phase voltage and current signals with selectable phase shifts and higher harmonic components. Questions concerning the accuracy of measurement and error sources are also briefly given.

Keywords

digital electricity meter, DSP, calibration

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IMEKO-WC-2009-TC4-185.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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