Harmonic optimization of multilevel converters using genetic algorithms

Abstract

In this paper, a genetic algorithm (CA) optimization technique is applied to multilevel inverter to determine optimum switching angles for cascaded multilevel inverters for eliminating some higher order harmonics while maintaining the required fundamental voltage. This technique can he applied to multilevel inverters with any number of levels; as an example in this paper, a 7-level inverter is considered, and the optimum switching angles are calculated oftline to eliminate the 5th and the 7th harmonics. Then, these angles are used in an experimental setup to validate the results.

Optimised active harmonic elimination technique for three‐level T‐type inverters

“…They can generally be classified into three main categories: carrier-based sinusoidal pulse-width modulation (PWM) (SPWM) [8][9][10][11], space vector modulation (SVM) [12][13][14][15][16][17][18][19][20] and selective harmonic elimination PWM (SHE-PWM) or fundamental frequency-switching control [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Elimination of lower order harmonics in Voltage Source Inverter feeding an induction motor drive using Evolutionary Algorithms

“…The 3rd and other triplen harmonics can be ignored if the machine has an isolated neutral. A Genetic Algorithm optimization technique is applied to determine the switching angles for a cascaded multilevel inverter (Ozpineci, Tolbert, & Chiasson, 2005) which eliminates specified higher order harmonics while maintaining the required fundamental voltage. A seven level inverter is considered and optimum switching angles are calculated offline to eliminate 5th and 7th harmonics.…”

A PSO based optimal switching technique for voltage harmonic reduction of multilevel inverter

“…Moreover, at certain points of modulation indices, there are discontinuities in the solution. In Jiang and Lipo (2000) the dc link voltage of the multilevel inverter is optimized while a genetic algorithm is used for harmonic optimization in Ozpineci, Tolbert, and Chiasson (2004).…”