DESIGN AND DEVELOPMENT OF SHUNT ACTIVE FILTER

Abstract

Shunt Active Power Filter (APF) or Active Power Line Conditioner (APLC) is designed and implemented for power quality improvements in terms of current harmonics and reactive-power compensation. The widespread use of' non-linear loads in industrial, commercial and domestic Icilitics cause harmonic problems. Harmonics induce malfunctions in sensitive equipment. overvoltage by resonance. increase heat in the conductors, harmonic voltage drop across the network impedance and affects other customer loads connected at the Point of Common Coupling (PCC). Active power line conditioner is implemented I'or compensating the harmonics and reactive-power simultaneously in the distribution system. The performance of the active power line conditioner depends on the design and characteristics of the controller adopted for APLC. The objective of this research is to find a suitable control strategy for reference current extraction as well as PWM-VSl current controller. constant instantaneous power control method, generalized fryze current minimization method and P1 method for the generation of reference current was studied and simulated for the a same three phase system and the results were compared. Fixed-Hysteresis Current Controller (HCC), approach is applied to generate switching pulses of the PWM-invertcr. A single phase shunt active filter was developed for the experimentation. The control used was based on P1 method and it was implemented on Arduino mcga