ACTIVE POWER FILTER USING ADAPTIVE FILTERS IN THE SYNCHRONOUS FRAME REFERENCE

This paper introduces an implementation of an active power filter employing an adaptive filter in the synchronous frame reference (SFR) for harmonic current mitigation in low voltage systems. The target of this filter is to reduce the harmonic current content in systems where can exist variations of the fundamental frequency. Further, the control design in the SFR gives the opportunity not only to mitigate harmonic current but also to compensate reactive power and regulate voltage under linear and nonlinear loads. Experimental results on a 1 kW prototype are provided to show the feasibility of the proposed control strategy. Finally, the conclusions are presented.