Abstract
In order to increase the overall power factor of the grid, this study suggests the operation of a seven-level Cascaded H-Bridge (CHB) based Static Synchronous Compensator (STATCOM) with decoupling control algorithm. This control method also exhibits the voltage balancing of dc-link capacitors connected with the STATCOM, using lesser number of voltage sensing devices. The phase-shifted sinusoidal-pulse-width-modulation (PSPWM) technique is utilised to generate gate pulses required for the semiconducting switches of the CHB inverter. Functionality of the CHB based STATCOM has also been tested under varieties of linear and nonlinear loading situations. The applicability of the CHB based STATCOM using the proposed control strategy is verified by simulation study in the MATLAB-Simulink platform.
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