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arXiv · 1206.1625

Performance assessment of two active power filter control strategies in the presence of non-stationary currents

Vin Cent Tai·Phen Chiak See·Marta Molinas·Kjetil Uhlen
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Abstract

This paper describes an active power filter (APF) control strategy, which eliminates harmonics and compensates reactive power in a three-phase four-wire power system supplying non-linear unbalanced loads in the presence of non-linear non-stationary currents. Empirical Mode Decomposition (EMD) technique developed as part of the Hilbert-Huang Transform (HHT) is used to singulate the harmonics and non-linear non stationary disturbances from the load currents. The control strategy for the APF is formulated by hybridizing the so called modified p-q theory with the EMD algorithm. A four-leg split-capacitor converter controlled by hysteresis band current controller is used as an APF. The results obtained are compared with those obtained with the conventional modified p-q theory, which does not possess current harmonics or distortions separation strategy, to validate its performance.

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Vin Cent Tai, Phen Chiak See, Marta Molinas, Kjetil Uhlen. 2012-06-07. Performance assessment of two active power filter control strategies in the presence of non-stationary currents. https://arxiv.org/abs/1206.1625

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