Estimation and mitigation of current harmonics using improved control schemes

Algorithms are well presented for estimation of harmonics and their elimination in a three phase system for power quality improvement. This paper presents the application of KF-Adaline Algorithm for estimation of power system harmonics and shunt active power filter with hysteresis current controller based on space vector modulation for perfect elimination of harmonics. The space vector modulation (SVM) based hysteresis current controller (HCC) combines both the advantages of SVM and HCC. This controller determines a set of space vector from a region detector and then applies a space vector according to the Hysteresis current controller. Reference current extraction is done by the synchronous detection technique which is compared to the actual current and the error current is fed to the Shunt Active Power Filter (SAPF). Shunt Active Power Filter manages to provide better compensation signals to eliminate the harmonics for power quality improvement which is fed to the distribution system. Simulation results are provided to verify the better performance of SAPF due to the proposed controller.