Multilevel Inverter Topology for Renewable Energy Grid Integration

Sid-ali Amamra, Kamal Meghriche, Abderrezzak Cherifi, Bruno Francois

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)


In this paper, a novel three-phase parallel grid-connected multilevel inverter topology with a novel switching strategy is proposed. This inverter is intended to feed a microgrid from renewable energy sources (RES) to overcome the problem of the polluted sinusoidal output in classical inverters and to reduce component count, particularly for generating a multilevel waveform with a large number of levels. The proposed power converter consists of n two-level (n + 1) phase inverters connected in parallel, where n is the number of RES. The more the number of RES, the more the number of voltage levels, the more faithful is the output sinusoidal waveform. In the proposed topology, both voltage pulse width and height are modulated and precalculated by using a pulse width and height modulation so as to reduce the number of switching states (i.e., switching losses) and the total harmonic distortion. The topology is investigated through simulations and validated experimentally with a laboratory prototype. Compliance with the IEEE 519-1992 and IEC 61000-3-12 standards is presented and an exhaustive comparison of the proposed topology is made against the classical cascaded H-bridge topology.
Original languageEnglish
Article number7800995
Pages (from-to)8855-8866
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Issue number11
Early online date28 Dec 2016
Publication statusPublished - 1 Nov 2017
Externally publishedYes


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