Research Article

Experimental Harmonics Analysis of UPS (Uninterrupted Power Supply) System and Mitigation Using Single-Phase Half-Bridge HAPF (Hybrid Active Power Filter) Based on Novel Fuzzy Logic Current Controller (FLCC) for Reference Current Extraction (RCE)

Figure 30

Source current before compensation (a) distorted waveform (b) frequency spectrum with THD 32.63%.
(a)
(b)