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Paper title: OUTPUT VOLTAGE WAVEFORM IMPROVEMENT OF MODIFIED CASCADED H-BRIDGE MULTILEVEL INVERTER USING SELECTIVE HARMONIC ELIMINATION TECHNIQUE BASED ON HYBRID GENETIC ALGORITHM

Author(s): FAY«AL CHABNI, RACHID TALEB, MíHAMED HELAIMI,

Abstract:

The main objective of this work is to improve the quality of voltage waveform generated by a modified cascaded H-bridge (CHB) multilevel inverter topology using selective harmonic elimination (SHE) control strategy and also using LC filters. This study presents a new topology of multilevel inverters that combines the conventional architecture of a cascade H-bridge inverter and LC filters. The SHE method is used to eliminate harmonics of chosen lower-order while controlling the amplitude of fundamental harmonic in CHB multilevel inverter. LC filters are added to the inverter in order to eliminate the high-order harmonics. Optimal switching angles are obtained by solving a non-linear equations system using hybrid genetic algorithm (HGA). 5 and 7 level configurations for the new topology are presented in this work. The obtained simulation results are validated through experimental results.

Keywords: Modified cascaded H-bridge (CHB) multilevel inverter, Selective harmonic elimination (SHE), Hybrid genetic algorithm, LC filter

Year: 2017 | Tome: 62 | Issue: 4 | Pp.: 405-410

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