A Control Scheme of Cascaded Multilevel Inverter Based D-STATCOM for Improving the Voltage Control and Reduce Total Harmonics Distortion

This paper presents an investigation of Nine -Level Cascaded H - bridge (CHB) Inverter as Distribution Static Compensator (DSTATCOM) in Power System (PS) for compensation of reactive power and harmonics. The advantages of CHB inverter are low harmonic distortion, reduced number of switches and suppression of switching losses. The DST ATCOM helps to improve the power factor and eliminate the Total Harmonics Distortion (THD) drawn from a Non-Liner Diode Rectifier Load (NLDRL). The battery energy storage is integrated to sustain the real power source under fluctuating wind power. The D-STATCOM control scheme for the grid connected three phase four wire systems for power quality improvement (Reactive power control and harmonics) is simulated using MATLAB/SIMULINK in power system block set. The effectiveness of the proposed scheme relives the main supply source from the reactive power demand of the load. The results are obtained through Mat lab / Simulink package.