Simulation Study and Implementation of Non-Direct Current Controlled Shunt Active Power Filter for Power Quality Enhancement
This article presents indirect Hysteresis Current Controlled (HCC) single phase Shunt Active Power Filter (SAPF) for power quality enhancement. In this SAPF consists of two control loops namely inner current loop and outer voltage loop. Here, FLC is acts as outer voltage loop for regulating D.C bus voltage of SAPF, while HCC is chosen as inner current loop for regulating/shape the supply current and reduce the harmonics. In existing control loop for SAPF, the reference current generation is derived from P-Q theory or D-Q theory and other computational methods, but in this designed control techniques reference current is derived from D.C link capacitor voltage of SAPF. The fuzzy rules are framed based on the SAPF performance. The performance designed model is validated at various load conditions by making the model over Proportional Integral (PI) controller. The responses are presented to show proficient of the designed model.