This paper deals with the design of a novel method in the synchronous reference frame (SRF) to extract the reference compensating current for single-phase shunt active power filters (APFs). Unlike previous works in the SRF, the proposed method has an innovative feature that it does not need the fictitious current signal. Frequency-independent operation, accurate reference current extraction and relatively fast transient response are other key features of the presented strategy. The effectiveness of the proposed method is investigated by means of detailed mathematical analysis. The results confirm the excellent performance of the suggested approach. Theoretical evaluations are confirmed by experimental results.
Journal of Power Electronics, 2013, Vol 13, Issue 4, p. 692-700
Active filter; Synchronous reference frame; Power quality