A Current Control for Three-Phase Four-Wire Shunt Active Filters

摘要

Opisan je aktivni filtar za kompenzaciju harmonijskog izobličenja, struje nultog sustava i jalove snage u trofaznim sustavima s četiri vodiča. Pozornost je usmjerena na upravljanje strujom da se postigne optimalno slijeđenje struje s pomoću konstantne frekvencije pobudnog signala. Djelotvornost predloženog upravljanja ispitana je simulacijom, gdje su harmonijsko zagađenje i neravnoteža, uzrokovani jakom distorzijom tereta, drastično reducirani.%An active filter has been proposed to compensate for harmonic distortion, line neutral current and reactive power in three-phase four-wire systems. The focus is concentrated on current control in order to achieve optimum current tracking by means of fixed frequency driving signals. The effectiveness of proposed control was proved in simulations where the harmonic pollution and imbalance caused by a highly distorting load have been drastically reduced.