Multiobjective Predictive Control of a three-phase seven-level cascaded H-bridge converter for grid-connected photovoltaic systems

Conference paper (2015)

Authors

Christian A. Rojas Universidad Técnica Federico Santa María

Samir Kouro Universidad Técnica Federico Santa María

Roberto Ruiz Universidad Técnica Federico Santa María

Sebastian Rivera Toronto Metropolitan University

Bin Wu Toronto Metropolitan University

Xiaoqiang Guo Yanshan University

Affiliation

External organisation

Predictive control Grid-Connected Photovoltaic Converters Multilevel Converters Photovoltaic Applications

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Published Date

28-09-2015

Language

English

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Abstract

This paper presents a grid-connected seven-level cascaded H-bridge converter operating as photovoltaic inverter. The main issue with this topology are the natural power imbalances between the power cells and the phases of the converter. The control problem is addressed with a Multiobjective Finite Control Set Model Predictive Control, where a dc-link voltage balance among the cells and good tracking of the active and reactive power references injected to the grid are achieved. Furthermore, an average switching frequency control per cell has been included. The proposed control scheme is validated trough simulation results and tested under dynamic conditions.