Power quality improvement using CHBMLI based D-STATCOM

This paper investigates the problems associated with distribution system in terms of delivery of clean power and their solutions, in particular the reactive power compensation. The abnormalities in the distribution system has been modeled and analyzed. The deviation so computed has been compensated by use of the D-STATCOM in the real time. A detailed model of 3-phase D-STATCOM for line voltage up to 11kV has been developed using cascaded multilevel voltage source converter structure (VSCs). A level shift PWM control has been developed for the multilevel inverter for the medium voltage distribution system. The scheme has been replaced for the control of the D-STATCOM so that it maintains the reactive power and THD under control by keeping all the voltage and current waveforms as per their standard sinusoidal forms. A SIMULINK model using MATLAB/SIMULINK platform has been used to present the proposed system. Simulation result for different operating condition has been obtained and analyzed for viewing the merit of the proposed control technique. The obtained results corroborate the effectiveness of control scheme.