This paper presents, Distribution Static Compensator (DST A TCOM) used for voltage regulation and harmonic mitigation in the three phase distribution system. Six pulse voltage source converter (VSC) is used as DSTATCOM with DC bus capacitor. Instantaneous Reactive Power Theory (IRP) and Synchronously Rotating Reference Frame Theory (SRF) is used for controlling the DSTATCOM. Using MATLAB and Sim Power System toolboxes (SPS), Simulink model of DSTATCOM is presented. Results of simulation of IRP and SRF theories are studied when linear as well as nonlinear loads are connected to the 3 phase distribution system. Experimental results are discussed and compared for both the theories used in this paper . HYSTERESIS BAND CURRENT CONTROLLER FOR VOLTAGE REGULATION AND HARMONIC MITIGATION USING DSTATCOM