This research investigates the steady state and dynamic performance of a cascaded H-Bridge multilevel inverter (CHBMLI)with the use of closed loop controllers. For tackling a variety of challenges, a dual loop cascaded controller is appropriate for an MLI system. It is made up of an outer loop and an inner loop. The outer loop controller is Proportional-Integral (PI) controller which is used as a voltage controller and inner loop controller is Proportional (P) controller which is used as a current controller. With the aid of a voltage controller, one may achieve steady state voltage, or a constant output voltage, while a current controller can shorten the time required to attain steady state, or the transient/dynamic period. Both linear and nonlinear loads utilize the same controller. The closed loop CHB-MLI model in this study is created using the MATLAB/SIMULINK platform, and the controller parameters proportional gain (Kp) and integral gain are carefully chosen (Ki). For linear load, the steady state and dynamic performance of a CHB-MLI is derived by changing these two parameters in both loops. By employing the same controller and the same settings for the controller parameters as for linear load, steady state performance under non-linear load is examined.

Non-linear Load, Linear Load,Dynamic Performance,Dual Loop Cascaded Controller, CHB-MLI.