Article,
PI with Fuzzy Logic Controller based APLC for compensating harmonic and reactive power
International Journal on Control System and Instrumentation, 1 (1): 5 (July 2010)
Abstract
This article explores design and analysis of
proportional integrator (PI) along with Fuzzy Logic
controller (FLC) based Shunt active power line
conditioners (APLC) for compensating reactive power
and harmonic currents drawn by the load. The aim is to
study different control strategies for real time
compensating current harmonics at different power
conditions. The compensation process is based on
calculation of unit sine vector and reduces the dc
capacitor ripple voltage of the PWM-VSI by using PI with
fuzzy logic controller. The switching is done according to
gating signals obtained from hysteresis band current
controller and capacitor voltage is continuously
maintained constant. The shunt APLC is investigated
through Matlab/Simulink simulation under different
steady state and transient conditions using PI, FLC and
PI with FLC. The results demonstrate that combination of
PI with FLC is a better solution that reduces the settling
time of the DC capacitor, suppresses harmonics and
reactive power in the load current(s).
