IMPROVEMENT OF POWER QUALITY ISSUES USING UNIFIED POWER QUALITY CONDITIONER IN DISTRIBUTION SYSTEM

The research work is predominantly focused on to improve the power quality in distribution system using UPQC system connected with grid.Generally the UPQC has 12 switches for improving the power quality, reduce the sag and swell and decrease the harmonic distortion.The unified power quality conditioner has reduced switches and also decreases the harmonic using various controllers. The series and shunt converter connects the dc link capacitor for ripple reduction but in nine switch UPQC device has integrate the series and shunt converter without capacitor.The unified power quality conditioner has presented for reduce the coupling problem by the presence of switching leg. A particle swarm optimization (PSO)-based multi-objective planning algorithm for power compensation of radial distribution system with UPQC consists of a series and a shunt inverter. The UPQC model based on phase angle control was used. In distributed system needs to explain the approaches for standard supply voltage droop and voltage swell. ThePSO-ANNcontroller has most appropriate in dynamic response with a simple configuration and reduces harmonics.