Variable speed pumped storage based on the use of H-bridge cascaded multilevel converter

This paper presents a cascaded H-bridge multilevel converter for application in variable-speed pump storage. Most of the results are related the performance of the inverter voltage, rotor currents and speed when the 6kV wound router induction machine is fed by 11 level H bridge inverter. Multi carrier phase shift modulation is used to obtain 11 level phase voltage. The phase shift transformer is used to feed the rectifier side of the H-Bridge cascaded multi-level converter to reduce the total harmonic distortion of the current motor. A simulation model based on the PS IM software program is used.