Performance Analysis of Universal Power Quality Conditioner Systems Based on Seven-level NPC Inverter Using PD-SPWM with Fuzzy Control Scheme

This paper presents novel Unified Power Quality Conditioner (UPQC) system based on seven-level Neutral Point Clamped (NPC) inverter using combined PD-SPWM and fuzzy control scheme. The proposed UPQC is adopted to mitigate source current harmonics compensate all voltage disturbances simultaneously. It designed by the combination of series shunt Active Filters (AFs) connected a common DC link capacitor. at bus maintained constant proportional integral controller. Synchronous Reference Frame (SRF) method used get APF reference signals power reactive theory (P-Q theory) for APF. Conventional schemes require complex calculations, use intelligent systems help reduce size operation complexity. Filter (APF) derived from algorithm are injected in Fuzzy controllers generate switching signals. functionality its evaluated Matlab-Simulink software SimPowerSystem Toolbox under various conditions cases most quality problems such as sag, swell, harmonic compensation nonlinear loads unbalanced load. simulation results show performances improve steady transient point coupling distribution distorted conditions.