Performance of Total Cross Tied Configured Solar Photovoltaic Module Under the Impact of Progressing Shadow Due to Clouds and Self-Shading in Roof Top Installations

Niti Agrawal

Abstract


Partial shading condition (PSC) is a prevalent effective condition which results in huge power loss in solar photovoltaic (SPV) system. The power output of SPV under PSC can be improved by altering the interconnections among PV cells/modules within the PV array i.e., by using different PV array configurations. Many previous studies have assessed the impact of static PSCs on different configurations and found that the total cross tied (TCT) configuration exhibits better performance. However, in real conditions, the shadows are neither static nor uniform. The study on the effect of dynamic or progressing PSCs on TCT configurations has received little attention. In this paper, performance of total cross tied (TCT) PV configuration have been studied under two realistic scenarios of progressing PSCs. These shading conditions are based on the shading due passage of cloud and self-shading in roof top installed PV system. For conducting this study, polycrystalline TCT module has been used. The PV output characteristics have been obtained experimentally using a solar simulator under 6 different shading cases for cloud passage and 9 for progressing horizontal row shading. Values of open circuit voltage, short circuit current, voltage at maximum power point, current at maximum power point, series resistance, maximum power, power loss and efficiency with shadow progression for both the shading scenarios have been obtained. Since the shape of the shadow changes continuously in real life, the obtained results are of significance in understanding the behaviour of TCT configuration over a long period of time under PSCs.


Keywords


solar energy

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DOI (PDF): https://doi.org/10.20508/ijrer.v15i3.14923.g9075

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