A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions
Photovoltaic (PV) modules experience some partial shading conditions (PSC) due to some various factors. In that kind of a condition, a few maximum power points (MPPs) possibly appear on the power-voltage (P-V) curve, which increases the tracking difficulties. It is known that maximum power point tra...
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doaj-d810a4139b254b5a9fbf9138d1c71b542020-11-24T22:08:49ZengMDPI AGElectronics2079-92922019-10-01810114210.3390/electronics8101142electronics8101142A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading ConditionsMustafa Engin Başoğlu0Department of Electrical and Electronics Engineering, Gümüşhane University, Gümüşhane 29100, TurkeyPhotovoltaic (PV) modules experience some partial shading conditions (PSC) due to some various factors. In that kind of a condition, a few maximum power points (MPPs) possibly appear on the power-voltage (P-V) curve, which increases the tracking difficulties. It is known that maximum power point tracking (MPPT) may not be realized by hill climbing (HC) based conventional MPPT algorithms under PSCs. In this context, this paper presents a novel micro converter based algorithm that was developed by using P-V characteristics of PV modules. Unlike voltage or duty ratio scanning techniques, this paper introduces a new deciding method to determine the correct global MPP (GMPP) region. For this, the proposed method uses some duty ratios that were calculated corresponding to each MPP region. Thus, the initialization of duty ratio is done properly, which results in high tracking speed and accurate tracking of the GMPP. The other advantages of the proposed algorithm are structural simplicity, less computational burden, and ease of implementation with a basic microcontroller. The simulation results show that this algorithm has fast tracking capability and it manages to track GMPP for PSCs correctly, since it includes an artificial scanning procedure. Single ended primary inductance converter (SEPIC) is built in order to validate the proposed global maximum power point tracking (GMPPT) algorithm. The performance of the proposed GMPPT technique is verified by experimental studies. The results show that the proposed GMPPT technique is fast by up to five times than an adaptive full scanning strategy and improved IC algorithm. Furthermore, the proposed algorithm can be commercially used in micro converters, since it is compatible with small number of bypass diodes in a module.https://www.mdpi.com/2079-9292/8/10/1142duty ratio samplingglobal maximum power point trackingmicro convertermpptpartial shading conditionphotovoltaic modulepower optimizer |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mustafa Engin Başoğlu |
spellingShingle |
Mustafa Engin Başoğlu A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions Electronics duty ratio sampling global maximum power point tracking micro converter mppt partial shading condition photovoltaic module power optimizer |
author_facet |
Mustafa Engin Başoğlu |
author_sort |
Mustafa Engin Başoğlu |
title |
A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions |
title_short |
A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions |
title_full |
A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions |
title_fullStr |
A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions |
title_full_unstemmed |
A Fast GMPPT Algorithm Based on PV Characteristic for Partial Shading Conditions |
title_sort |
fast gmppt algorithm based on pv characteristic for partial shading conditions |
publisher |
MDPI AG |
series |
Electronics |
issn |
2079-9292 |
publishDate |
2019-10-01 |
description |
Photovoltaic (PV) modules experience some partial shading conditions (PSC) due to some various factors. In that kind of a condition, a few maximum power points (MPPs) possibly appear on the power-voltage (P-V) curve, which increases the tracking difficulties. It is known that maximum power point tracking (MPPT) may not be realized by hill climbing (HC) based conventional MPPT algorithms under PSCs. In this context, this paper presents a novel micro converter based algorithm that was developed by using P-V characteristics of PV modules. Unlike voltage or duty ratio scanning techniques, this paper introduces a new deciding method to determine the correct global MPP (GMPP) region. For this, the proposed method uses some duty ratios that were calculated corresponding to each MPP region. Thus, the initialization of duty ratio is done properly, which results in high tracking speed and accurate tracking of the GMPP. The other advantages of the proposed algorithm are structural simplicity, less computational burden, and ease of implementation with a basic microcontroller. The simulation results show that this algorithm has fast tracking capability and it manages to track GMPP for PSCs correctly, since it includes an artificial scanning procedure. Single ended primary inductance converter (SEPIC) is built in order to validate the proposed global maximum power point tracking (GMPPT) algorithm. The performance of the proposed GMPPT technique is verified by experimental studies. The results show that the proposed GMPPT technique is fast by up to five times than an adaptive full scanning strategy and improved IC algorithm. Furthermore, the proposed algorithm can be commercially used in micro converters, since it is compatible with small number of bypass diodes in a module. |
topic |
duty ratio sampling global maximum power point tracking micro converter mppt partial shading condition photovoltaic module power optimizer |
url |
https://www.mdpi.com/2079-9292/8/10/1142 |
work_keys_str_mv |
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