This study presents a D-Q current control method with modified phase lock loop to generate the required reference current for shunt hybrid active filter (SHAPF) to improve the power quality. The performance of the proposed controller has been evaluated in terms of harmonic current mitigation and reactive power compensation under different grid conditions. Here, the passive elements of SHAPF have been used for compensation of lower order harmonics and the active part mitigates the higher order harmonics. Proportional-integral controller is considered here for DC-link voltage regulation of the inverter. For verification, the proposed controller of SHAPF is compared with the conventional SHAPF controllers. Extensive simulations of the proposed technique are carried out through MATLAB-SIMULINK environment. A laboratory prototype has been built on dSPACE1104 platform to verify the feasibility of the suggested SHAPF controller. From the simulation and experimental results, the robustness of the proposed SHAPF controller is proved.

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Original scientific paperNon-linear load deteriorates the quality of current waveforms at the point of common coupling of various consumers. Active power filter (APFs) is used to mitigate the most concern harmonic pollution in an electrical network. The controller part is the nucleus of an active power filter configuration. Active power filter performance is affected significantly by the selection of current control techniques. The active filter and its current control must have the capability to track sudden slope variations in the current reference to compensate the distorted current drawn by the voltage source inverter. Therefore, the choice and implementation of the current regulator is more important for the achievement of a satisfactory performance level. In this survey, technical reviews of various types of controllers covering a wide range have been presented. This work also reveals the advantages and disadvantages of the practiced control strategies. The effectiveness of the study will help the researchers to choose the proper control methods for various applications of active power filter. Key words: Active power filters, Control algorithms, Current controllers, Comparison, Harmonic currents Power quality, Total harmonic distortion, Root mean square (RMS) errorRegulatori struje aktivnih filtara snage za poboljšanje kvalitete snage: Tehnička analiza. Nelinearni tereti pogoršavaju kvalitetu strujnih valova u točki u kojoj se spaja više potrošača. Aktivni filtar snage se koristi za ublaža-vanje najvažnijeg harmoničkog onečišćenja strujne mreže. Jezgra aktivnog filtra snage je regulator. Na performanse aktivnog filtra snage značajno utječe odabir upravljačke tehnike. Aktivni filtar i njegova tehnika upravljanja strujom moraju imati mogućnost pratiti nagle skokove u referentnoj vrijednosti struje kako bi mogli kompenzirati izobličenja struje koju vuče inverter naponskog izvora. Zato su izbor i implementacija regulatora struje iznimno važni za postizanje zadovoljavajuće razine performansi. U ovom pregledu su predstavljene tehničke recenzije koje pokrivaju širok raspon regulatora. Ovaj rad takoer otkriva prednosti i mane korištenih strategija upravljanja. Efektivnost ovog pregleda pomoćiće istraživačima da izaberu ispravnu metodu upravljanja za različite aplikacije aktivnog filtra snage.

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