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Partial shading analysis of multistring PV arrays and derivation of simplified MPP expressions

Partial shading analysis of multistring PV arrays and derivation of simplified MPP expressions
Partial shading analysis of multistring PV arrays and derivation of simplified MPP expressions
In this paper, the electrical response of a partially shaded photovoltaic (PV) array, comprising several strings connected in parallel, is investigated. The PV array is simulated by employing an enhanced version of the widely used single-diode model, reformulated in an explicit manner employing the Lambert W function. The multiple maximum power points (MPPs) that appear on the P-V characteristic of the array in partial shading conditions are analyzed, in terms of their number and properties. Simplified empirical expressions are then derived to calculate the voltage, current, and power for each local MPP, at any irradiance level and temperature, using only datasheet information, in a most simple and straightforward manner, without resorting to detailed modeling and simulations. The derived formulae are validated using both simulation and experimental results.
Direct expressions, energy model, explicit, local maxima, maximum power point (MPP), partial shading, photovoltaic (PV) array, power peaks, simplified expressions
1949-3029
499-508
Psarros, Georgios N.
9c187038-5708-4159-85ea-af9f6069c71c
Batzelis, Efstratios I.
2a85086e-e403-443c-81a6-e3b4ee16ae5e
Papathanassiou, Stavros A.
49cbcb43-649a-47c2-b294-9bc4d88898b9
Psarros, Georgios N.
9c187038-5708-4159-85ea-af9f6069c71c
Batzelis, Efstratios I.
2a85086e-e403-443c-81a6-e3b4ee16ae5e
Papathanassiou, Stavros A.
49cbcb43-649a-47c2-b294-9bc4d88898b9

Psarros, Georgios N., Batzelis, Efstratios I. and Papathanassiou, Stavros A. (2015) Partial shading analysis of multistring PV arrays and derivation of simplified MPP expressions. IEEE Transactions on Sustainable Energy, 6 (2), 499-508, [7042759]. (doi:10.1109/TSTE.2015.2389715).

Record type: Article

Abstract

In this paper, the electrical response of a partially shaded photovoltaic (PV) array, comprising several strings connected in parallel, is investigated. The PV array is simulated by employing an enhanced version of the widely used single-diode model, reformulated in an explicit manner employing the Lambert W function. The multiple maximum power points (MPPs) that appear on the P-V characteristic of the array in partial shading conditions are analyzed, in terms of their number and properties. Simplified empirical expressions are then derived to calculate the voltage, current, and power for each local MPP, at any irradiance level and temperature, using only datasheet information, in a most simple and straightforward manner, without resorting to detailed modeling and simulations. The derived formulae are validated using both simulation and experimental results.

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More information

Published date: 1 April 2015
Keywords: Direct expressions, energy model, explicit, local maxima, maximum power point (MPP), partial shading, photovoltaic (PV) array, power peaks, simplified expressions

Identifiers

Local EPrints ID: 449502
URI: http://eprints.soton.ac.uk/id/eprint/449502
ISSN: 1949-3029
PURE UUID: 2c7bf23c-5b65-48c3-b5b5-a02661049083
ORCID for Efstratios I. Batzelis: ORCID iD orcid.org/0000-0002-2967-3677

Catalogue record

Date deposited: 04 Jun 2021 16:30
Last modified: 27 Apr 2022 02:18

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Contributors

Author: Georgios N. Psarros
Author: Efstratios I. Batzelis ORCID iD
Author: Stavros A. Papathanassiou

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