Selective Harmonics Elimination for Five Level Inverters with Unequal DC Sources
1Tapas Ranjan Mahapatra, Satis Chaudhary
The present paper is related to “Selective Harmonics Elimination for five Level Inverters with Unequal DC Sources”. The main aim of the project is the usage of couple of multilevel inverters (MLI), dc sources are enable to do functioning at higher levels of voltages and switching frequencies of lesser values as compared to the normally available inverters. A technique called “Selective Harmonic Elimination (SHE)” is used in this paper at 1st order (fundamental frequency) to remove the harmonics and improve the efficiency. A modulation procedure related to a method of harmonic removal is established in case of 5-level inverters with uneven values of voltage at dc link. The methodology provides the result in analytical form. Calculations of switching angles and how they affect harmonic distortion has been observed which is similar to the simulation.
Inverter, harmonics, Modulation Technique.