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Energies 2018, 11(6), 1369; https://doi.org/10.3390/en11061369

Service Continuity of PV Synchronous Buck/Buck-Boost Converter with Energy Storage

Institut Jean Lamour (UMR7198), Université de Lorraine Vandoeuvre lès Nancy, Campus Artem - BP 50840, F-54511 Nancy, France
This paper is an extended version of our paper published in EEEIC 2017: Service Continuity of PV Synchronous buck/buck-boost Converter with Energy Storage.
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Received: 24 April 2018 / Revised: 9 May 2018 / Accepted: 21 May 2018 / Published: 28 May 2018
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Abstract

Numerous advantages offered by Photovoltaic (PV) generation systems coupled with the increasing power demands for clean energy put PV systems in the front of many research works. For stand-alone applications powered with PV systems, the reliability of the power conversion stage is essential to ensure the continuous supply of energy. Therefore, in the case of any failure occurring in the power conversion stage, it is mandatory to provide remedial actions to guarantee the service continuity of the produced electrical power. This paper analyses the service continuity of a two-stage buck/buck-boost converter with energy storage, driven with synchronous control. The initial two-stage converter is made fault-tolerant and robust to failures of its two switches by adding only one additional switch associated with two diodes. In this study, only open-circuit switch faults are considered. The proposed fault-tolerant circuit and the initial one have the same electrical behavior when synchronous control is used. The applied synchronous control in both healthy conditions and post-fault operation ensures the same functionalities without degrading the system’s performances. The proposed two-stage synchronously-controlled circuit is validated through simulation in the cases of open circuit faults on the two switches of the initial converter. The obtained results show the feasibility of the proposed functional redundancy and the continuity of operation at full power after switch fault diagnosis. View Full-Text
Keywords: service continuity; open circuit switch failure; fault-tolerant operation; synchronous control; DC-DC converter; PV modules service continuity; open circuit switch failure; fault-tolerant operation; synchronous control; DC-DC converter; PV modules
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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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Siouane, S.; Jovanović, S.; Poure, P. Service Continuity of PV Synchronous Buck/Buck-Boost Converter with Energy Storage. Energies 2018, 11, 1369.

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