Module block fault locating strategy for large-scale photovoltaic arrays

Pei, T; Li, L; Zhang, J; Hao, X

Module block fault locating strategy for large-scale photovoltaic arrays

Pei, T Li, L

Zhang, J

Hao, X

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Energy Conversion and Management, 2020, 214
Issue Date:: 2020-06-15

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Field	Value	Language
dc.contributor.author	Pei, T
dc.contributor.author	Li, L https://orcid.org/0000-0001-8485-2216
dc.contributor.author	Zhang, J https://orcid.org/0000-0003-2616-6722
dc.contributor.author	Hao, X
dc.date.accessioned	2021-03-07T19:29:59Z
dc.date.available	2021-03-07T19:29:59Z
dc.date.issued	2020-06-15
dc.identifier.citation	Energy Conversion and Management, 2020, 214
dc.identifier.issn	0196-8904
dc.identifier.issn	1879-2227
dc.identifier.uri	http://hdl.handle.net/10453/146861
dc.description.abstract	© 2020 Elsevier Ltd In practical grid-connected photovoltaic systems, faulty modules for small-scale photovoltaic arrays need to be accurately located, while the same strategy to locate each faulty module for large-scale arrays would imply high investment cost due to a large number of sensors needed. Therefore, to reduce the number of sensors and save fault monitoring investment, it suffices to identify where fault happens in a module block, which consists of several modules connected in series. For this purpose, this paper proposes a fault-locating strategy to identify faulty module blocks for large-scale arrays, where voltage sensors are deployed by differentiating the parity of string numbers in the array to acquire the terminal voltages of the module blocks between adjacent strings, and the fault locating rules for open circuit, short circuit, degradation and partial shading faults are formulated. With the help of MATLAB/Simulink platform, the proposed strategy is tested in one small-size array and two large-scale arrays, and the testing results demonstrate that the proposed strategy can locate the single fault case, multiple faults of single-type, as well as mixed faults of different sub-arrays. To summarize, the proposed fault-locating method has higher locating accuracy, lower implementation cost and wiring complexity, and is easily integrable with existing photovoltaic systems.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Energy Conversion and Management
dc.relation.isbasedon	10.1016/j.enconman.2020.112898
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 0913 Mechanical Engineering
dc.subject.classification	Energy
dc.title	Module block fault locating strategy for large-scale photovoltaic arrays
dc.type	Journal Article
utslib.citation.volume	214
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-07T19:29:52Z
pubs.publication-status	Published
pubs.volume	214

Abstract:

© 2020 Elsevier Ltd In practical grid-connected photovoltaic systems, faulty modules for small-scale photovoltaic arrays need to be accurately located, while the same strategy to locate each faulty module for large-scale arrays would imply high investment cost due to a large number of sensors needed. Therefore, to reduce the number of sensors and save fault monitoring investment, it suffices to identify where fault happens in a module block, which consists of several modules connected in series. For this purpose, this paper proposes a fault-locating strategy to identify faulty module blocks for large-scale arrays, where voltage sensors are deployed by differentiating the parity of string numbers in the array to acquire the terminal voltages of the module blocks between adjacent strings, and the fault locating rules for open circuit, short circuit, degradation and partial shading faults are formulated. With the help of MATLAB/Simulink platform, the proposed strategy is tested in one small-size array and two large-scale arrays, and the testing results demonstrate that the proposed strategy can locate the single fault case, multiple faults of single-type, as well as mixed faults of different sub-arrays. To summarize, the proposed fault-locating method has higher locating accuracy, lower implementation cost and wiring complexity, and is easily integrable with existing photovoltaic systems.

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http://hdl.handle.net/10453/146861