Cascaded Five Level Inverter Switching Sequence Optimization Using S-Function

  K.Lavanya Raj,  N.Karthik

The multilevel inverter utilization has been increased since the last decade. These new type of inverters are suitable in various high voltage and high power applications due to their ability to synthesize waveforms with better harmonic spectrum and faithful output. This paper presents a symmetrical five level cascaded H-bridge multilevel inverter, using multicarrier pulse width modulation technique. And also comparison is made between multicarrier pulse width modulation and the s-function. The Simulation results are presented to prove that THD is reduced with the multicarrier modulation. From the results, the proposed inverter provides higher output quality with relatively lower power loss as compared to the other conventional inverters with the same output quality to compare, the simulation studies have been extended for single phase cascaded H-bridge five level inverter using multi carrier pulse width modulation. The results obtained using S-function are found more reliable compared to multi carrier pulse width modulation, in terms of total harmonic distortion. The system was simulated using Mat lab/Simulink.

Keywords- Cascaded H-bridge multilevel inverter (CH-MLI), S-function, multicarrier pulse-width modulation, total harmonic distortion (THD).

Unique Identification Number - IJEDR1603032
Page Number(s) - 190-194
Pubished in - Volume 4 | Issue 3 | July 2016
DOI (Digital Object Identifier) -   
Publisher - IJEDR (ISSN - 2321-9939)

  K.Lavanya Raj,  N.Karthik,   "Cascaded Five Level Inverter Switching Sequence Optimization Using S-Function", International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.4, Issue 3, pp.190-194, July 2016, Available at :http://www.ijedr.org/papers/IJEDR1603032.pdf