Decrease Total Harmonics Distortion by using Filter in Three Phase 27- Level CMI
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Abstract
This work show a single phase and three-phase 28-echelon cascaded H-bridge multilevel inverter topology for DC systems with a completely unique Pulse width-modulated control concept is used. Conventional cascaded H-bridge multilevel inverter for two and three cells per phase, and then the control is used to an inverter with multi-level cells. In this method, the diode clamps the voltage across the switch to one level, and all diodes are selected as same type. This technique is effectively reduces an oversized number of specific harmonic, and also the output voltage lead to low total harmonic distortion and switching frequency. The proposed research used a CMLI with filter and without filter for reducing the THD. The overall performance and presentation of the candidate is good and satisfactory.