Open AccessHarmonic Elimination of Cascaded Multilevel Inverter using Metaheuristic Optimization Methods
Author(s) -
Srikanta Kumar Dash,
Byamakesh Nayak,
Jiban Ballav Sahu,
Rojalin Rout
Publication year - 2018
Publication title -
international journal of engineering and technology
Language(s) - English
Resource type - Journals
ISSN - 2227-524X
DOI - 10.14419/ijet.v7i4.15.23005
Subject(s) - harmonics , transcendental equation , maxima and minima , total harmonic distortion , inverter , control theory (sociology) , metaheuristic , harmonic , nonlinear system , mathematical optimization , mathematics , optimization problem , computer science , voltage , engineering , physics , numerical analysis , mathematical analysis , control (management) , artificial intelligence , quantum mechanics , electrical engineering
The harmonic elimination of multilevel inverters is a complicated task that includes nonlinear transcendental equations. With the increase in the level of the multilevel inverter, the no of variables of the equation also increases which makes the problem more complicated. Metaheuristic optimization algorithms play an important role in finding out optimum switching angles required for elimination of harmonics in a lesser computational time avoiding multiple local minima. This paper deals with the harmonic elimination of cascaded multilevel inverter using whale optimization algorithm. The whale optimization method has the ability to escape local minima and it takes less time of computation of results. Results are verified theoretically by taking an example of a 15-level cascaded H-bridge inverter fed from equal d.c.sources. The above scheme well minimizes lower order harmonics and gives better output voltage and a low total harmonic distortion.