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A Three-Phase Power Source with Low THD for Energy Meters Calibration
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| Author(s) |
Gorazd Modrijan, Peter Zajec, Janez Nastran, Henrik Lavric, Danijel Voncina |
| Abstract |
The paper presents an experimental three-phase
electronic phantom power source with special requirements,
designed for calibrating mostly electronic energy meters.
The three-phase power calibrator arrangement generates a
variable phantom power of up to 19.2 kVA per phase. Two
different power amplifiers, i.e. a voltage and a
transconductance amplifier, and other individual
components of the power calibrator are introduced and
explained. A control method suitable for reducing effects of
nonlinear periodic disturbances on electrical quantities, i.e.
the output waveforms of voltage and current sources, is
explained. The focus is on the theory of a modified repetitive
control method based on a procedure with a recurrent
integral action distributing the controlled signal in a certain
number of intervals and subsequently correcting each
interval separately and independently of the remaining
intervals. Results acquired with the help of the experimental
source are presented. |
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| Filename: | T3-123.pdf |
| Filesize: | 304.5 KB |
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| Type |
Members Only |
| Date |
Last modified 2007-03-13 by System |
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