A Novel Three-Port NPC Converter for Grid-Tied Photovoltaic Systems with Integrated Battery Energy Storage

Sebastián Neira, Alonso Lizana, Javier Pereda

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

The variable behaviour of the photovoltaic (PV) generation arises as the main drawback of this technology. Therefore, Battery Energy Storage (BES) units appear as a promising solution to overcome the inherent intermittent generation profile of PV systems. BES can be implemented separated from the PV generation units or integrated within a single power system. The latter option gives a better dynamic response, as the variable generation can be directly complemented with the BES, controlling the power flow between both elements with the grid. Thus, there is a need for power converters with capability of interface both PV and BES with the grid in a reliable and efficient way. This paper proposes a Three-Port NPC converter to connect a PV array and a BES unit with the ac grid using a single power processing stage. The converter is based in the H-NPC inverter and allows the connection of a low voltage battery to act as a power buffer ensuring a firm energy dispatch to the grid. Furthermore, simulation results show that the proposed topology maintains the good performance of the H-NPC in terms of efficiency, voltage harmonic distortion and reduced leakage current.
Original languageEnglish
Title of host publication2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
PublisherIEEE
Pages104-109
Number of pages6
ISBN (Print)978-1-7281-6991-0
DOIs
Publication statusPublished - 9 Nov 2020
Event2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) - Dubrovnik, Croatia
Duration: 28 Sept 20201 Oct 2020

Conference

Conference2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Period28/09/201/10/20

Keywords / Materials (for Non-textual outputs)

  • Photovoltaic systems
  • Simulation
  • Inverters
  • Batteries
  • Topology
  • Leakage currents
  • Load flow

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