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Paper Abstract and Keywords
Presentation 2022-01-28 09:55
Highly Extendable Modular Differential Power Processing Converter Utilizing Isolated Bus to Improve Power Generation of Photovoltaic Strings in Large-Scale Systems
Takumi Suzuki, Masatoshi Uno (Ibaraki Univ.) EE2021-41
Abstract (in Japanese) (See Japanese page) 
(in English) The characteristic mismatch due to partial shading in photovoltaic (PV) strings comprising multiple panels triggers not only a significant reduction in energy yield but also a malfunction of maximum power point tracking. Differential power processing (DPP) converters have been proposed to prevent negative influences of characteristic mismatch. In large-scale systems, however, conventional DPP converters face various challenges, such as poor extendibility and increased cumulative power conversion loss. This paper proposes a modular DPP architecture with an isolated bus for large-scale systems. Several panels are grouped as a module, each having a DPP converter, and the system can be flexibly scaled up by adding modules without redesigning the DPP converter. Power from unshaded high-voltage modules is directly transferred to shaded low-voltage ones through the isolated bus, reducing the cumulative power conversion loss. A field testing using a prototype for a 1-kW module demonstrated the energy yield enhancement of 5.6% by the proposed DPP converter.
Keyword (in Japanese) (See Japanese page) 
(in English) Photovoltaic / Partial Shading / Differential Power Processing Converter / High Extendibility / LLC Converter / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 359, EE2021-41, pp. 58-63, Jan. 2022.
Paper # EE2021-41 
Date of Issue 2022-01-20 (EE) 
ISSN Online edition: ISSN 2432-6380
Copyright
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EE2021-41

Conference Information
Committee EE  
Conference Date 2022-01-27 - 2022-01-28 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2022-01-EE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Highly Extendable Modular Differential Power Processing Converter Utilizing Isolated Bus to Improve Power Generation of Photovoltaic Strings in Large-Scale Systems 
Sub Title (in English)  
Keyword(1) Photovoltaic  
Keyword(2) Partial Shading  
Keyword(3) Differential Power Processing Converter  
Keyword(4) High Extendibility  
Keyword(5) LLC Converter  
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1st Author's Name Takumi Suzuki  
1st Author's Affiliation Ibaraki University (Ibaraki Univ.)
2nd Author's Name Masatoshi Uno  
2nd Author's Affiliation Ibaraki University (Ibaraki Univ.)
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Speaker Author-1 
Date Time 2022-01-28 09:55:00 
Presentation Time 25 minutes 
Registration for EE 
Paper # EE2021-41 
Volume (vol) vol.121 
Number (no) no.359 
Page pp.58-63 
#Pages
Date of Issue 2022-01-20 (EE) 


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