THD ANALYSIS OF DIFFERENT CASCADED MULTILEVEL INVERTER TOPOLOGIES WITH DC MEASUREMENT ALGORITHM FOR DRIVE APPLICATIONS

Priya.R, Sarumathi.N, UmaMaheswari.R, Balaji.D

Abstract: This paper presents about the development of new single phase cascaded MLI topology and comparative study of new development one with the existing topologies. A single basic unit is first developed and cascaded connection of basic units made to generate positive levels at the output. Therefore, to generate all the voltage levels, H Bridge is added in the outside of series connected basic units .The structure forms the new proposed topology. Four algorithms are proposed for measuring the magnitude of DC voltage. The comparative study is made to prove that the proposed inverter uses the reduced no of power switches, driver circuits and DC voltage sources. The performance and functional of proposed system are confirmed by both computer simulations using MATLAB software and laboratory prototype implementation.

Keywords: Cascaded MLI, Basic Units,DC Voltage Measuremnts

DOI: https://doi.org/10.15623/ijret.2016.0505013