Model for Thermal Behavior of Shaded Photovoltaic Cells under Hot-Spot Condition

Giaffreda, Daniele; Omaña, M.; Rossi, Daniele; Metra, C.

doi:10.1109/dft.2011.47

Cited by 26 publications

(16 citation statements)

References 14 publications

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“…As shown in [10], the contribution of ii) to the temperature T HS is considerably higher than the contribution of i). As a result, when a PV cell is shaded, its temperature T HS tends to increase very quickly Our thermal model (Fig.…”

Section: Model Description and Validationmentioning

confidence: 86%

“…Our model, as preliminarily described in [10], consists of two series thermal RC circuits. The lower RC circuit (composed by C THcell and R THcell ) accounts for the temporal behavior of the PV cell temperature as a function of solar irradiation (T cell in Fig.…”

Section: Model Description and Validationmentioning

confidence: 99%

“…To achieve this goal, first we describe a model that we have preliminary introduced in [10],to estimate the temperature of a PV cell, as a function of the time interval in which it is under hot-spot.…”

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confidence: 99%

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Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

Rossi

Omaña

Giaffreda

et al. 2015

IEEE Trans. VLSI Syst.

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obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.The WestminsterResearch online digital archive at the University of Westminster aims to make the research output of the University available to a wider audience. Copyright and Moral Rights remain with the authors and/or copyright owners.Whilst further distribution of specific materials from within this archive is forbidden, you may freely distribute the URL of WestminsterResearch: ((http://westminsterresearch.wmin.ac.uk/).In case of abuse or copyright appearing without permission e-mail repository@westminster.ac.uk TVLSI-00149-2014 1  Abstract-We address the problem of modeling the thermal behavior of photovoltaic (PV) cells undergoing a hot-spot condition. In case of shading, in fact, PV cells, may experience a dramatic temperature increase, with consequent reduction of the provided power. Our model has been validated against experimental data, and has highlighted a counterintuitive PV cell behavior, that should be taken into account to improve the energy efficiency of PV arrays. Then, we propose a hot-spot detection scheme, enabling to identify the PV module that is under hot-spot condition. Such a scheme can be used to avoid the permanent damage of the cells under hot-spot, thus their drawback on the power efficiency of the entire PV system.

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Section: Model Description and Validationmentioning

confidence: 86%

Section: Model Description and Validationmentioning

confidence: 99%

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Modeling and Detection of Hotspot in Shaded Photovoltaic Cells

Rossi

Omaña

Giaffreda

et al. 2015

IEEE Trans. VLSI Syst.

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“…If a cell is shaded and operation at high temperatures occurs for a long time, then irreparable damage is due to happen to the solar cell. If a bypass diode is used, a cell in reverse bias renders useless the rest of the cells under the bypass diode [6]. The hot-spot occurrence is particularly frequent and always happens when a shadow covers the module, thus reducing the photo-generated current [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…The diodes bypass limit the reverse voltage that can be applied to a cell, thus avoiding it from reaching the BV when the cell is shaded [6]. Due to impurities and defects inside the silicon, some cells may display a great reverse current even before reaching the BV.…”

Section: Introductionmentioning

confidence: 99%

Crystalline Silicon PV Module Under Effect of Shading Simulation of the Hot-Spot Condition

Anjos

Melício

Mendes

et al. 2017

IFIP Advances in Information and Communication Technology

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Abstract. This paper centers on the silicon crystalline PV module technology subjected to operation conditions with some cells partially or fully shaded. A shaded cell under hot-spot condition operating at reverse bias are dissipating power instead of delivering power. A thermal model allows analyzing the temperature increase of the shaded cells of the module under hot-spot condition with or without protection by a bypass diode. A comparison of the simulation results for a crystalline PV module without shading and with partial or full shading is presented.

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