Title :
A new scheme for generating and measuring active, reactive, and apparent power at power frequencies with uncertainties of 2.5×10 -6
Author :
Ramm, Günther ; Moser, Harald ; Braun, Andreas
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/1999 12:00:00 AM
Abstract :
A new method for generating and measuring active, reactive, and apparent power at power frequencies has been devised. It makes use of digital signal synthesis and discrete Fourier transform (DFT) evaluation based on a single master clock. This results in a significant reduction of synchronizing errors and thus in an uncertainty of only 2.5×10 -6 (k=1)
Keywords :
calibration; digital voltmeters; direct digital synthesis; discrete Fourier transforms; measurement uncertainty; power measurement; reactive power; waveform generators; DFT evaluation; SI traceability; active power; apparent power; complex voltage/current ratio; digital signal synthesis; generating method; measuring method; phase angle; power calibrators; power factor; precision power measurements; reactive power; single master clock; single sampling voltmeter; sinusoidal voltage generator; synchronizing errors reduction; uncertainty; Clocks; Discrete Fourier transforms; Frequency measurement; Power generation; Power measurement; Reactive power; Sampling methods; Switches; Voltage; Voltmeters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
