| Abstract |
Cascaded H-bridge (CHB) converter is one of the popular solution for medium voltage transformerlessstatic synchronous compensator (STATCOM) applications. The semiconductor devices of this converterare switched at low frequency. Therefore, conduction losses contribute to major part of the losses inthis converter. To reduce the conduction losses, a cascaded U-cell (CUC) multilevel converter is derivedfrom CHB converter.The proposed converter has less number of switches compared to CHB converterand therefore reduces the overall losses of the converter. Converter circuit topology, control strategy andsimulation results for static var compensation are presented. The losses are estimated and compared withthat of CHB converter to verify the reduction of overall losses in proposed converter. |
