A simulation-optimization system for the optimal design of a multilevel inverter

In this paper, a simulation-optimization system for the optimal design of a multilevel inverter is presented. This system is a combination of an optim ization tool and a simulation program. The optimization tool is used as a p owerful procedure for the resolution of the design problem formulated in te rms of objective function and constraints. The simulation program is with k nowledge of the sequences of operation and is used to compute the inverter steady-state characteristics. An optimal design of the multilevel inverter is performed with the simulation-optimization system. The design constraint s include the maximum current ripple in the inductors, maximum voltage ripp le in the capacitors, output power, and required efficiency of the inverter . The total weight of the capacitors and the inductors is taken as an objec tive function to be optimized. The optimal design results of the multilevel inverter are verified by an experimental prototype, The inverter is design ed and implemented for a UPS application.