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Appl. Sci. 2016, 6(10), 287; doi:10.3390/app6100287

Three-Phase PV CHB Inverter for a Distributed Power Generation System

Department of Electrical Engineering and Information Technology, University of Napoli Federico II, Via Claudio 21, Napoli 80125, Italy
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Author to whom correspondence should be addressed.
Academic Editor: Yongheng Yang
Received: 14 July 2016 / Revised: 23 September 2016 / Accepted: 27 September 2016 / Published: 11 October 2016
(This article belongs to the Special Issue Advancing Grid-Connected Renewable Generation Systems)
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Abstract

This work deals with the design of a three-phase grid-tied photovoltaic (PV) cascade H-bridge inverter for distributed power conversion. The power balancing among the phases must be properly addressed. In fact, an intra-phase power imbalance—arising from uneven irradiance and temperature conditions—generates a per-phase power imbalance. This latter can be compensated by the injection of a proper zero-sequence voltage, while the intra-phase balance is ensured by means of a hybrid modulation method which is able to guarantee the handling of unequal DC (Direct Current) sources, stable circuit operation, and maximization of PV power production. The digital controller is developed and tested in Matlab/Simulink environment integrated with XSG (Xilinx System Generator), thus allowing an easy transfer on a field-programmable gate array (FPGA) platform and accurately describing the behavior of a real hardware implementation. Thus, numerical results have been considered to prove the effectiveness of the proposed approach. View Full-Text
Keywords: distributed energy conversion; grid-tied multilevel inverter; modulation technique; photovoltaic power systems distributed energy conversion; grid-tied multilevel inverter; modulation technique; photovoltaic power systems
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Guerriero, P.; Coppola, M.; Di Napoli, F.; Brando, G.; Dannier, A.; Iannuzzi, D.; Daliento, S. Three-Phase PV CHB Inverter for a Distributed Power Generation System. Appl. Sci. 2016, 6, 287.

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