Flexible multilevel boost DC-AC converter

In this paper, incorporation of multi-output boost (MOB) converter by multilevel inverter is proposed. Renewable energy sources such as fuel cell and photovoltaic produce low level of voltage. So to increase the magnitude of the voltage, dc-dc boost converter is used. Simple control and flexible operation for generating different number of output with desired voltage level is the main reason of using MOB converter. In this work, the outputs of MOB converter are applied as dc-link of multilevel inverter. Also, a new structure of multilevel inverter which is compatible with MOB converter is proposed. So by incorporation of MOB converter with proposed multilevel inverter an adjustable multilevel ac source is obtained. In fact, by proper controlling of outputs of MOB converter, the generation of different levels of voltage in output of multilevel inverter without any using of additional capacitors or switches is possible. Finally the operation of double output inverter which is incorporated by proposed multilevel inverter has been verified by simulation results using PSCAD/EMTDC software.