Grid-Connected Three-Phase H-Bridge Inverter with Level Doubling Network Controlled by Staircase Modulation Techniques

Konferenz: CIPS 2018 - 10th International Conference on Integrated Power Electronics Systems
20.03.2018 - 22.03.2018 in Stuttgart, Deutschland

Tagungsband: ETG-Fb. 156: CIPS 2018

Seiten: 7Sprache: EnglischTyp: PDF

Persönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt

Srndovic, Milan; Viatkin, Aleksandr; Grandi, Gabriele (Department of Electrical, Electronic, and Information Engineering, University of Bologna, Italy)

This paper presents a grid-tie three-phase five-level H-bridge (HB) inverter with Level Doubling Network (LDN), controlled by different types of staircase modulation technique. This structure allows, with reduced number of active switches and isolated DC sources, generating the same number of inverter voltage levels (five), in comparison to a standard cascaded H-bridge (CHB) topology with two HB cells in one phase, while still maintaining the same power quality. Furthermore, the implementation and comparison of different staircase modulation techniques gives an overview of their pros and cons with respect to total voltage harmonic distortion (THD), complete spectral harmonic attenuation, and elimination of a particular harmonic in a wide modulation index range.