Title :
Active filter control methods based on different power theories
Author_Institution :
Inst. of Electr. Eng., Czechoslovak Acad. of Sci., Prague, Czech Republic
Abstract :
A few different power theories are presented and used in the control strategies of the shunt active filter in case of the unsymmetrical supply voltage system. The time responses of the currents, instantaneous powers and losses, obtained by the simulation, are shown and compared. Although for the symmetrical voltage system with only the fundamental harmonic, different power theories provide effectively the same results, those may differ substantially for unsymmetrical supply systems with harmonics. The results, summarised in the table, show that the applied power theories influence substantially the basic performance criteria: the shapes of the supply currents, instantaneous powers, and losses. With regard to the purpose of the use of a device for power quality improvement an appropriate control strategy must be implemented
Keywords :
active filters; harmonic distortion; power harmonic filters; power supply quality; control strategies; harmonics; performance criteria; power theories; shunt active filter control methods; symmetrical voltage system; time response; unsymmetrical supply voltage system; Active filters; Control systems; Current supplies; Performance loss; Power harmonic filters; Power quality; Power supplies; Power system harmonics; Shape; Voltage control;
Conference_Titel :
Industrial Electronics, 1999. ISIE '99. Proceedings of the IEEE International Symposium on
Conference_Location :
Bled
Print_ISBN :
0-7803-5662-4
DOI :
10.1109/ISIE.1999.798666