Five-level H-bridge NPC central photovoltaic inverter with open-end winding grid connection

Conference paper (2014)

Authors

Christian A. Rojas Universidad Técnica Federico Santa María

Samir Kouro Universidad Técnica Federico Santa María

Daniel Edwards Universidad Técnica Federico Santa María

Bin Wu Toronto Metropolitan University

Sebastian Rivera Toronto Metropolitan University

Affiliation

External organisation

Multilevel converters Grid-connected PV converters Photovoltaic applications

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Published Date

24-02-2014

Language

English

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External organisation

Abstract

This investigation presents a grid-connected five-level H-bridge neutral-point-clamped converter operating with a single dc-link as photovoltaic power source. The operation with a single dc-bus is enabled by adding a transformer with open-end winding secondary, where each power cell of the converter is connected. The proposed control scheme is validated trough simulation results and tested under dynamic conditions. It can be implemented with a good tracking of the active and reactive power references injected to the grid. The results serve as a preliminary validation to potential utilization of the converter in large scale photovoltaic energy conversion systems.