SIMULATION OF MULTI-PULSE CONVERTER FED MULTILEVEL INVERTER BASED IM DRIVE USING MODIFIED CARRIER LEVEL SHIFTED PWM

The ever-growing demands for electrical energy and continuous enhancement in the energy price enforce to utilize an efficient electric drive system because high power medium voltage induction motors (MVIMs) are the major consumer of electricity in various industries like ship transport, oil, and gas, etc. These industries have adopted
medium voltage induction motor drive (MVIMD) in more than 80% of crucial applications. Generally, a 3-ø voltage source inverter (VSI) is used to operate the adjustable speed induction motor drive. For this, a 3-ø VSI is supplied by a 3-ø diode bridge rectifier (DBR), which is fed from a grid-connected stepdown transformer. Here, a step-down transformer is an essential element because the grid supply either has 11kV or 33kV. This project presents a 36-pulse converter and 5-level cascaded H-bridge multi-level
inverter (CHB-MLI) fed medium voltage induction motor drive system. The multi-winding transformer (MWT) for a 36-pulse AC-DC converter is designed in such a way that it
requires the least number of windings and enhances power quality at the grid end. This is helpful to reduce the size, weight, and cost of the presented medium voltage induction
motor drive (MVIMD). The modified carrier level shifted pulse width modulation (MCLSPWM) is used to control 5-level CHB-MLI fed induction motor (IM), total circuit is
simulated using MATLAB SIMULINK.