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An accurate method for MPPT to detect the partial shading occurrence in a PV system

This paper proposes an accurate detection scheme that effectively differentiates the partial shading from the uniform change of irradiance. By doing so, it avoids the unnecessary global peak search which results in a drop of the maximum power point tracker (MPPT) efficiency. The detection is achieve...

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Main Authors: Ahmed, J., Salam, Z.
Format: Article
Published: IEEE Computer Society 2017
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utm.my/id/eprint/76252/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031713907&doi=10.1109%2fTII.2017.2703079&partnerID=40&md5=b36c5c1db59d503a8cee7439b83e5ae9
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spelling my.utm.762522018-06-29T21:58:21Z http://eprints.utm.my/id/eprint/76252/ An accurate method for MPPT to detect the partial shading occurrence in a PV system Ahmed, J. Salam, Z. TK Electrical engineering. Electronics Nuclear engineering This paper proposes an accurate detection scheme that effectively differentiates the partial shading from the uniform change of irradiance. By doing so, it avoids the unnecessary global peak search which results in a drop of the maximum power point tracker (MPPT) efficiency. The detection is achieved by calculating the irradiance at two designated points on the I-V curve namely, i.e., the short-circuit $(I-{{\text{sc}}})$ and MPP $(I-{{\text{mpp}}})$ currents. Since the mismatch of irradiance at these two points differs greatly for the partial shading and uniform irradiance change, the occurrence of the former is easily discriminated. To prove its effectiveness, the scheme is integrated into perturb and observe and particle swarm optimization MPPT algorithms using a buck-boost converter. Its performance under several partial shading and dynamic shading condition is simulated using MATLAB/Simulink and validated using the dSpace DS1104 platform. It only requires three samples to determine if partial shading occurs; without the scheme, an unnecessary scans of the entire P-V curve is initiated. Consequently, MPPT transient efficiency is increased by 30-35%. In addition to this, the calculated irradiance is utilized to update the open-circuit voltage of the array, thus eliminating the use of temperature and irradiance sensors. IEEE Computer Society 2017 Article PeerReviewed Ahmed, J. and Salam, Z. (2017) An accurate method for MPPT to detect the partial shading occurrence in a PV system. IEEE Transactions on Industrial Informatics, 13 (5). pp. 2151-2161. ISSN 1551-3203 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031713907&doi=10.1109%2fTII.2017.2703079&partnerID=40&md5=b36c5c1db59d503a8cee7439b83e5ae9
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Ahmed, J.
Salam, Z.
An accurate method for MPPT to detect the partial shading occurrence in a PV system
description This paper proposes an accurate detection scheme that effectively differentiates the partial shading from the uniform change of irradiance. By doing so, it avoids the unnecessary global peak search which results in a drop of the maximum power point tracker (MPPT) efficiency. The detection is achieved by calculating the irradiance at two designated points on the I-V curve namely, i.e., the short-circuit $(I-{{\text{sc}}})$ and MPP $(I-{{\text{mpp}}})$ currents. Since the mismatch of irradiance at these two points differs greatly for the partial shading and uniform irradiance change, the occurrence of the former is easily discriminated. To prove its effectiveness, the scheme is integrated into perturb and observe and particle swarm optimization MPPT algorithms using a buck-boost converter. Its performance under several partial shading and dynamic shading condition is simulated using MATLAB/Simulink and validated using the dSpace DS1104 platform. It only requires three samples to determine if partial shading occurs; without the scheme, an unnecessary scans of the entire P-V curve is initiated. Consequently, MPPT transient efficiency is increased by 30-35%. In addition to this, the calculated irradiance is utilized to update the open-circuit voltage of the array, thus eliminating the use of temperature and irradiance sensors.
format Article
author Ahmed, J.
Salam, Z.
author_facet Ahmed, J.
Salam, Z.
author_sort Ahmed, J.
title An accurate method for MPPT to detect the partial shading occurrence in a PV system
title_short An accurate method for MPPT to detect the partial shading occurrence in a PV system
title_full An accurate method for MPPT to detect the partial shading occurrence in a PV system
title_fullStr An accurate method for MPPT to detect the partial shading occurrence in a PV system
title_full_unstemmed An accurate method for MPPT to detect the partial shading occurrence in a PV system
title_sort accurate method for mppt to detect the partial shading occurrence in a pv system
publisher IEEE Computer Society
publishDate 2017
url http://eprints.utm.my/id/eprint/76252/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85031713907&doi=10.1109%2fTII.2017.2703079&partnerID=40&md5=b36c5c1db59d503a8cee7439b83e5ae9
_version_ 1643657259864031232
score 13.211869

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