Implementation of adaptive hysteresis current control technique for shunt active power conditioner and its comparison with conventional hysteresis current control technique

Poor power quality is the main issue in the present day electrical power supply system. The main cause of poor power quality is distortion and interruption in the natural form of power. Electrical drives, switching of semiconductor devices etc. result in severe voltage fluctuation, noisy operation of machine and un-necessary losses in transmission lines. In this paper, power quality issues and the possible solution are reviewed. Shunt active power filter with different reference current generation techniques and current control techniques is presented. Mathematical analysis and hardware implementation of Adaptive hysteresis current control is presented. Comparative analysis between fixed band hysteresis current control and adaptive hysteresis current control is given in tabular form.