Partially Shaded Operation of Multi-String PV Systems

Christopher Deline

doi:10.1109/PVSC.2010.5616821

Partially Shaded Operation of Multi-String PV Systems

Christopher Deline

Materials Science

Research output: Contribution to conference › Paper › peer-review

45 Scopus Citations

Abstract

New shade mitigation technologies are available claiming improved performance under shaded conditions. A typical multi-string photovoltaic (PV) system was operated under partial shading conditions with and without these DC-DC converters. Power loss was attributed to low irradiance on shaded modules, current mismatch within shaded PV strings, and voltage mismatch between parallel strings. Indirect loss from voltage mismatch contributed up to 40% of the total power loss from shading. A representative residential solar installation was evaluated for potential benefit from DC-DC equipment. Detailed shading site survey information was collected and used to modify a PV production model. Using various assumptions on the severity of shade in this PV model, the application of DC-DC converters improved annual modeled power production by 5%-10% and recovered 24%-48% of the power lost due to shading.

Original language	American English
Pages	394-399
Number of pages	6
DOIs	https://doi.org/10.1109/PVSC.2010.5616821 https://doi.org/10.1109/PVSC.2010.5616821
State	Published - 2010
Event	35th IEEE Photovoltaic Specialists Conference, PVSC 2010 - Honolulu, HI, United States Duration: 20 Jun 2010 → 25 Jun 2010

Conference

Conference	35th IEEE Photovoltaic Specialists Conference, PVSC 2010
Country/Territory	United States
City	Honolulu, HI
Period	20/06/10 → 25/06/10

NREL Publication Number

NREL/CP-520-47750

Keywords

cell efficiency
device performance
solar cells

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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title = "Partially Shaded Operation of Multi-String PV Systems",

abstract = "New shade mitigation technologies are available claiming improved performance under shaded conditions. A typical multi-string photovoltaic (PV) system was operated under partial shading conditions with and without these DC-DC converters. Power loss was attributed to low irradiance on shaded modules, current mismatch within shaded PV strings, and voltage mismatch between parallel strings. Indirect loss from voltage mismatch contributed up to 40% of the total power loss from shading. A representative residential solar installation was evaluated for potential benefit from DC-DC equipment. Detailed shading site survey information was collected and used to modify a PV production model. Using various assumptions on the severity of shade in this PV model, the application of DC-DC converters improved annual modeled power production by 5%-10% and recovered 24%-48% of the power lost due to shading.",

keywords = "cell efficiency, device performance, solar cells",

author = "Christopher Deline",

year = "2010",

doi = "10.1109/PVSC.2010.5616821",

language = "American English",

pages = "394--399",

note = "35th IEEE Photovoltaic Specialists Conference, PVSC 2010 ; Conference date: 20-06-2010 Through 25-06-2010",

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T1 - Partially Shaded Operation of Multi-String PV Systems

AU - Deline, Christopher

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AB - New shade mitigation technologies are available claiming improved performance under shaded conditions. A typical multi-string photovoltaic (PV) system was operated under partial shading conditions with and without these DC-DC converters. Power loss was attributed to low irradiance on shaded modules, current mismatch within shaded PV strings, and voltage mismatch between parallel strings. Indirect loss from voltage mismatch contributed up to 40% of the total power loss from shading. A representative residential solar installation was evaluated for potential benefit from DC-DC equipment. Detailed shading site survey information was collected and used to modify a PV production model. Using various assumptions on the severity of shade in this PV model, the application of DC-DC converters improved annual modeled power production by 5%-10% and recovered 24%-48% of the power lost due to shading.

KW - cell efficiency

KW - device performance

KW - solar cells

UR - http://www.scopus.com/inward/record.url?scp=78650127782&partnerID=8YFLogxK

U2 - 10.1109/PVSC.2010.5616821

DO - 10.1109/PVSC.2010.5616821

M3 - Paper

AN - SCOPUS:78650127782

SP - 394

EP - 399

T2 - 35th IEEE Photovoltaic Specialists Conference, PVSC 2010

Y2 - 20 June 2010 through 25 June 2010

ER -

Partially Shaded Operation of Multi-String PV Systems

Abstract

Conference

NREL Publication Number

Keywords

UN SDGs

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