LVRT capability based on P‐V curve fitting under partial shading conditions
Abstract The new generation of photovoltaic (PV) systems represents higher sustainability during grid faults thanks to increased ancillary services, such as low voltage ride‐through (LVRT) capability used when the PV system is subjected to voltage sag. Unlike previously presented strategies that jus...
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Online Access: | https://doi.org/10.1049/rpg2.12126 |
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doaj-063e8f00e5a44992b3efd07fef2919f92021-08-02T08:20:35ZengWileyIET Renewable Power Generation1752-14161752-14242021-05-011571469148210.1049/rpg2.12126LVRT capability based on P‐V curve fitting under partial shading conditionsMehdi Kazemi Jervekani0Mehdi Niroomand1Seyed Mohammad Madani2Department of Electrical Engineering University of Isfahan Isfahan IranDepartment of Electrical Engineering University of Isfahan Isfahan IranDepartment of Electrical Engineering University of Isfahan Isfahan IranAbstract The new generation of photovoltaic (PV) systems represents higher sustainability during grid faults thanks to increased ancillary services, such as low voltage ride‐through (LVRT) capability used when the PV system is subjected to voltage sag. Unlike previously presented strategies that just dealt with voltage sag problem under uniform radiation conditions, in this study, a new control strategy implementing LVRT capability during low‐voltage faults under partial shading conditions is proposed. First, radiation levels are estimated by using the least‐squares curve fitting (LSCF) algorithm. Second, the voltage/current of maximum power points (MPPs) and minimum power points are calculated. Also, the corresponding algebraic function for the (Power ‐ Voltage) P‐V curve is extracted using only PV voltage and power vectors. Finally, under partial shading conditions, the moving operating point to the right side of MPP is well‐achieved through a power proportional‐integral controller. To validate the effectiveness of the proposed control strategy, simulations and experiments are conducted on PV systems. The simulation and experimental results and the comparison made between this algorithm's performance and other methods confirm that the proposed algorithm outperforms other methods in terms of high accuracy, fast dynamic and low oscillations in different partial shading conditions and with different radiations.https://doi.org/10.1049/rpg2.12126 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mehdi Kazemi Jervekani Mehdi Niroomand Seyed Mohammad Madani |
spellingShingle |
Mehdi Kazemi Jervekani Mehdi Niroomand Seyed Mohammad Madani LVRT capability based on P‐V curve fitting under partial shading conditions IET Renewable Power Generation |
author_facet |
Mehdi Kazemi Jervekani Mehdi Niroomand Seyed Mohammad Madani |
author_sort |
Mehdi Kazemi Jervekani |
title |
LVRT capability based on P‐V curve fitting under partial shading conditions |
title_short |
LVRT capability based on P‐V curve fitting under partial shading conditions |
title_full |
LVRT capability based on P‐V curve fitting under partial shading conditions |
title_fullStr |
LVRT capability based on P‐V curve fitting under partial shading conditions |
title_full_unstemmed |
LVRT capability based on P‐V curve fitting under partial shading conditions |
title_sort |
lvrt capability based on p‐v curve fitting under partial shading conditions |
publisher |
Wiley |
series |
IET Renewable Power Generation |
issn |
1752-1416 1752-1424 |
publishDate |
2021-05-01 |
description |
Abstract The new generation of photovoltaic (PV) systems represents higher sustainability during grid faults thanks to increased ancillary services, such as low voltage ride‐through (LVRT) capability used when the PV system is subjected to voltage sag. Unlike previously presented strategies that just dealt with voltage sag problem under uniform radiation conditions, in this study, a new control strategy implementing LVRT capability during low‐voltage faults under partial shading conditions is proposed. First, radiation levels are estimated by using the least‐squares curve fitting (LSCF) algorithm. Second, the voltage/current of maximum power points (MPPs) and minimum power points are calculated. Also, the corresponding algebraic function for the (Power ‐ Voltage) P‐V curve is extracted using only PV voltage and power vectors. Finally, under partial shading conditions, the moving operating point to the right side of MPP is well‐achieved through a power proportional‐integral controller. To validate the effectiveness of the proposed control strategy, simulations and experiments are conducted on PV systems. The simulation and experimental results and the comparison made between this algorithm's performance and other methods confirm that the proposed algorithm outperforms other methods in terms of high accuracy, fast dynamic and low oscillations in different partial shading conditions and with different radiations. |
url |
https://doi.org/10.1049/rpg2.12126 |
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