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Paper Abstract and Keywords
Presentation 2023-10-05 11:05
Photovoltaic System Achieving High Efficiency and Circuit Miniaturization by Reducing Power Rating in Combination with Partially Connected Converter and Differential Power Processing Converter
Keita Sugiura, Joji Yabuki, Masatoshi Uno (Ibaraki Univ.) EE2023-17
Abstract (in Japanese) (See Japanese page) 
(in English) In photovoltaic (PV) systems consisting of multiple PV panels connected in series, a conventional converter requires a large power rating due to handling the power generated by all panels, resulting in increased circuit volume. A PV system in which a converter is partially connected to series-connected panels has been proposed to reduce power rating. However, a partially connected converter triggers the mismatch in panel voltage, leading to decreased energy yield. This paper proposes a novel PV system in combination with the partially connected converter and a differential power processing (DPP) converter that can unify panel voltage. The proposed system realizes not only eliminating panel voltage imbalance and enhancing energy yield by the DPP converter that have been proposed to prevent negative influences of partial shading, but also a reduction in power rating and circuit volume by the partially connected converter. Theoretical analysis of a PV string comprising four series panels demonstrated that in addition to the power rating reduction of up to 58%, the proposed system reduced circuit volume. Experimental verification of PV systems using prototypes demonstrated that in addition to achieving the overall efficiency of up to 98%, the proposed system with the DPP converter realized 12% improvement in energy yield.
Keyword (in Japanese) (See Japanese page) 
(in English) photovoltaic systems / partially connected converter / differential power processing converter / power rating / circuit miniaturization / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 199, EE2023-17, pp. 1-6, Oct. 2023.
Paper # EE2023-17 
Date of Issue 2023-09-28 (EE) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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 EE2023-17

Conference Information
Committee EE WPT  
Conference Date 2023-10-05 - 2023-10-06 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EE 
Conference Code 2023-10-EE-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Photovoltaic System Achieving High Efficiency and Circuit Miniaturization by Reducing Power Rating in Combination with Partially Connected Converter and Differential Power Processing Converter 
Sub Title (in English)  
Keyword(1) photovoltaic systems  
Keyword(2) partially connected converter  
Keyword(3) differential power processing converter  
Keyword(4) power rating  
Keyword(5) circuit miniaturization  
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Keyword(7)  
Keyword(8)  
1st Author's Name Keita Sugiura  
1st Author's Affiliation Ibaraki University (Ibaraki Univ.)
2nd Author's Name Joji Yabuki  
2nd Author's Affiliation Ibaraki University (Ibaraki Univ.)
3rd Author's Name Masatoshi Uno  
3rd Author's Affiliation Ibaraki University (Ibaraki Univ.)
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Speaker Author-1 
Date Time 2023-10-05 11:05:00 
Presentation Time 25 minutes 
Registration for EE 
Paper # EE2023-17 
Volume (vol) vol.123 
Number (no) no.199 
Page pp.1-6 
#Pages 6 
Date of Issue 2023-09-28 (EE) 

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