Study of Mitigation of Current Harmonics using Hysteresis Current Controller Technique

Power Quality problems are becoming most important issues for today's power system engineers. Major use of power electronics appliances has increased the harmonics disturbances in power systems. The harmonics are basically due to presence of non-linear load in power system as these loads draw harmonic and reactive power components of current from main supply. Current Harmonics are generated by nonlinear loadsfor example drives of adjustable speed, static power supply, UPS etc. In order to reduce the effects of harmonics, a perfect compensator is required. Among many compensators Shunt Active Power Filters (SAPF) has better harmonics compensation. This paper deals with the performance analysis and study of SAPF under control strategy namely instantaneous real active and reactive power method (p-q) for extracting reference currents of SAPF under balance load condition. This paper includes the study and analysis of hysteresis control technique which is applied to compensate the current harmonics in power system.