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International Journal of Photoenergy
Volume 2011, Article ID 643912, 8 pages
Research Article

Efficiency Considerations and Application Limits of Single-Phase Active Power Filter with Converters for Photoenergy Applications

1Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
2Faculty of Electrical Engineering, University of Ljubljana, Tržaška 25, 1000 Ljubljana, Slovenia

Received 30 June 2011; Revised 11 August 2011; Accepted 29 August 2011

Academic Editor: Vincenzo Augugliaro

Copyright © 2011 Saša Sladić et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A new way of connecting PV sources to adaptive voltage active power filter (AV APF) has been compared with classic approach including active power filter (APF). In standard active power filter applications a relatively high DC link voltage (500 V or even more) with a buck converter or lower voltage (approx. 100 V) with boost converter can be used. These two converters appear also in adaptive voltage circuit of AV APF, but in this case it is possible to achieve many different connections of DC source. Benefit of this approach is that the same circuit is used for improving switching conditions in APF and for connection of solar cells. It appears that these two functions support each other and a large variety of DC voltages and currents can be connected to AC mains. Experimental results confirm expectations of increased energy transfer from additional DC source to network, especially for DC voltages being lower than DC link voltage.