International Journal of Engineering and Technology

shunt connected custom power device called distribution static compensator (D-STATCOM) are used to alleviate current related power quality problems in distribution systems. The main purpose of D-STATCOM is to reduce harmonics in source side of system. In D-STATCOM, reference filter currents are generated by instantaneous symmetrical component theory. Switching pulses for Voltage source inverter(VSI) are given by comparing filter currents with actual source currents. In this paper, performance of D-STATCOM in terms of harmonic reduction, for fixed hysteresis current control scheme(HCC) and variable band hysteresis current controller(AHCC) is proposed. The load side and source side harmonics of the system for both switching controllers are compared by using MATLAB/SIMULINK and %Total Harmonic distortion(THD) is less in case of AHCC.