Crystal Structure Algorithm (CryStAl) Based Selective Harmonic Elimination Modulation in a Cascaded H-Bridge Multilevel Inverter

This paper introduces an effective Selective Harmonic Elimination (SHE) modulation technique in a five, seven, and nine-level cascaded H-bridge (CHB) multilevel inverter (MLI). Minimization of the harmonics device counts is basis for ongoing research area MLI. Reduced hence lower Total Distortion (THD), improve output power quality. SHE low-frequency scheme to achieve this goal. techniques are used eliminate distinct lower-order by determining optimum switching angles. These angles evaluated solving non-linear transcendental equations using any optimization technique. For purpose, Crystal Structure Algorithm (CryStAl) has been paper. It metaheuristic, nature-inspired, highly efficient CryStAl simple parameter-free algorithm that doesn’t require determination internal parameter during process. based on concept crystal structure formation joining lattice point. natural occurrence can be realized crystalline minerals their symmetrically organized components: ions, atoms, molecules. The utilized solve equations. SIMULINK/MATLAB environment simulation. simulation result shows very excels other metaheuristic algorithm. Hardware results validate performance.