Mitigation of Voltage sag using DSTATCOM

Abstract: The paper describes the modelling and simulation of a Distribution Static Synchronous Compensator (DSTATCOM) which injects the current at the point of common coupling in the network to eliminate or mitigate the voltage sag. It shows the capability and performance of DSTATCOM to mitigate and void out the voltage sag & a control technique based on Bang Bang controller and Hysteresis current controller is modelled to check the results. A VSC based D-STATCOM is modelled using MATLAB simulink tool. Thus the simulations are performed without & with DSTATCOM. Simulation results lead to the showings that the D-STATCOM mitigates voltage sag as well as improves power quality of system.

Keywords: DSTATCOM, Voltage Sag, Power Quality, VSI, Distribution System, Induction motor, Hysteresis Controller