Presentation Details
| Improved Shading Tolerance of Photovoltaic Modules Using Small-Area High-Voltage (SAHiV) and Total Cross-Tied (TCT) Topology Luthfan Fauzan1, 2, Min Ju Yun1, Yeon Hyang Sim1, Hyekyoung Choi1, Dong Yoon Lee1, Seung I.Cha1, 2. 1Korea Electrotechnology Research Institute, Changwon, South Korea.2Department of Electro-functionality Materials Engineering, University of Science and Technology, Changwon, South Korea |
Abstract
The urban photovoltaic (PV) application faces the unexpected problem of partial shading, which can severely affect generation performance and pose safety issues for photovoltaic modules. This research proposes Small-Area High-Voltage (SAHiV) modules equipped with cross-tied bypass diodes at the module level. SAHiV modules operate on a pseudo-high-voltage, low-current principle, improving the efficiency and reliability of PV modules under various shading conditions. Through simulations and experimental validations to compare the performance of conventional, shingled, and SAHiV PV modules. In particular, five diode configurations are extensively considered, with total cross-tied (TCT) modifications to level arrays, to determine the optimal configuration. This study used two power-testing module performance methods: MPPT and running voltage under the 1 Sun condition (VSTC). The results showed the SAHiV modules with TCT connections demonstrate near-ideal performance across a wide range of shading intensities. This module achieved a performance of (Pan≥0.9), significantly higher than that of shingled and conventional modules. Even without bypass diodes, SAHiV modules maintain significantly higher Pan values than other modules with one diode per cell. These findings emphasize the importance of optimizing bypass diode connections to enhance shading tolerance and stable power production, offering a promising way to improve the adaptability and efficiency of solar energy systems in urban environments.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.