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Deep discharge failure in an automated supply integrating PV storage and grid connection
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DOI：10.1016/j.egypro.2013.07.148.png)
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Abstract
En 中文
In the first part of fins contribution, we present the technical choices done for a realization designed to supply, with a large part of renewable electricity, a greenhouse dedicated to biology teaching in a high school in Region Lorraine, France. All functions implemented in photovoltaic generator (PV) are listed. At the conclusion of few visits during one year, dedicated to reading of experimental results, efficiency of PV generator can be studied and first hazardous events remarked. In the second part we analyze the possible origins of a deep discharge failure of a lead-acid battery that can occur in the functioning process M spite of the presence, M the system, of a charge controller, a control and monitoring by a Programmable Logic Controller (PLC) and a careful design in the choice of components. Fault tree analysis coupled to functional description of part of programming implied in failure gives a list of the most probable causes of the undesirable event, subject of this paper. Finally, we indicate the recovery battery procedure we have attempted, following the serious deep discharge. Tests in diverse charge/discharge conditions after recovery procedure will conclude this study. (C) 2013 The Authors. Published by Elsevier Ltd. Open access under CC BY-NC-ND license. Selection and/or peer-review under responsibility of the TerraGreen Academy
Keywords:
stand-alone photovoltaic systems
grid connected PV systems
lead-acid storage
deep discharge failure
dependability
functional analysis
fault-tree analysis
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