Power quality (PQ) problem can be defined as the deviations of the voltage and current from the nominal sine
wave. PQ problems generally concern with voltage sags, swells, interruptions and harmonic currents. This work presents ANN
controller based UPQC system under wind turbine system for reducing THD value in PV system. It also provides the concept of
operating wind turbine with UPQC. The Unified Power Quality Conditioner (UPQC) is a custom power device, which
diminishes voltage and current related power quality issues.