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Mathematical Problems in Engineering
Volume 2010, Article ID 517184, 13 pages
Research Article

Cooperative Control of Active Power Filters in Power Systems without Mutual Communication

1Department of Power Engineering, Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, 166 27 Prague 6, Czech Republic
2Department of Electric Machines, Drives, and Power Electronics, Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, 182 02 Prague 8, Czech Republic

Received 10 August 2010; Accepted 8 November 2010

Academic Editor: Ilmar Ferreira Santos

Copyright © 2010 Josef Tlustý 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.


The procedure for calculating controller parameters of the APFs implemented into a multibus industrial power system for harmonic voltage mitigation is presented. The node-voltage-detection control strategy is applied and the basic controller parameters are found under the condition that the demanded THD factors at the buses where the APFs are placed will be obtained. A cooperative control of several APFs without mutual communication is proposed, simulated, and experimentally verified. By tuning the controller gains without considering the power circuit parameters, all APFs used tend to share harmonic load currents approximately equally regardless of the operation modes of the nonlinear loads in different parts of the power system.