Control of a Fault-Tolerant Photovoltaic Energy Converter in Island Operation

Marino Coppola, Pierluigi Guerriero, Adolfo Dannier, Santolo Daliento, Davide Lauria and Andrea Del Pizzo
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Marino Coppola: Department of Electrical Engineering and Information Technologies, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Pierluigi Guerriero: Department of Electrical Engineering and Information Technologies, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Adolfo Dannier: Department of Electrical Engineering and Information Technologies, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Santolo Daliento: Department of Electrical Engineering and Information Technologies, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Davide Lauria: Department of Industrial Engineering, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy
Andrea Del Pizzo: Department of Electrical Engineering and Information Technologies, University of Napoli Federico II, Via Claudio 21, 80125 Napoli, Italy

Energies, 2020, vol. 13, issue 12, 1-18

Abstract: The paper deals with design and control of a fault tolerant and reconfigurable photovoltaic converter integrating a Battery Energy Storage System as a standby backup energy resource. When a failure occurs, an appropriate control method makes the energy conversion system capable of operating in open-delta configuration in parallel with the grid as well as in islanded mode. In case network voltage is lacking due to heavy anomalies or maintenance reasons, the proposed control system is able to quickly disconnect the inverter from the grid while ensuring the energy continuity to the local load and the emergency fixtures by means of the integrated battery packs. In particular, the paper proposes a fast islanding detection method essential for the correct operation of the control system. This specific technique is based on the Hilbert transform of the voltage of the point of common coupling, and it identifies the utility lack in a period of time equal to half a grid cycle in the best case (i.e., 10 ms), thus resulting in good speed performance fully meeting the standard requirements. A thorough numerical investigation is carried out with reference to a representative case study in order to demonstrate the feasibility and the effectiveness of the proposed control strategy.

Keywords: power systems for renewable energy; fault-tolerant photovoltaic inverter; islanding detection; energy storage system (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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