Instantaneous reactive power control and its model for single phase loads

In this thesis, non-active current theory based on average concept and instantaneous reactive power theory (p-q theory) based on Clark transformation have been studied and analyses of reactive power and reactive current calculation of these theories has been represented. Based on analyses limits of both theories by means of case studies has been realized. New switching function of gate pulses has been extracted and has been examined in state space model in MATLAB/Simulink and programming. Based on model investigation and basic reactive power flow concept novel Cascade PI controller has been proposed. MATLAB simulation of p-q theory with hysteresis current controller, non-active current theory with SPWM controller and proposed cascade PI controller has been established and effectiveness of control methods has been examined. Finally in a laboratory prototype DSP based implementation has been built and by means of C/C++ language represented theories? code have been executed and simulation and analyses results are verified by experimental ones. Keywords: p-q theory, non-active current theory, power quality, STATCOM, active power filter, reactive power compensation, single-phase system, SPWM, hysteresis current controller