The Effect of Low Insolation Conditions and Inverter Oversizing on the Long-Term Performance of a Grid-Connected Photovoltaic System

Jayanta Deb Mondol, Yigsaw Yohanis, Brian Norton

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The performance of a roof mounted grid-connected photovoltaic (PV) system inNorthern Ireland was monitored over 3 years on annual, seasonal and monthly bases.The overall system performance was adversely affected by low insolation conditions;19% of total incident insolation was absorbed at irradiance level below 200 W/m2 and67% below 600 W/m2, only 6.2% above 900 W/m2. In summer and winter, the PVandsystem efficiencies were 9.0 and 8.5%, and 7.8 and 7.5%, respectively and inverterefficiencies were 86.8 and 85.8%, respectively. The inverter for this particular systemwas oversized; 77% of the total DC energy produced when inverter’s operating loadwas 50% of its rated capacity. The annual average monthly system performance ratio(PR) was 0.61 with seasonal variation 0.59 to 0.63. The average monthly PV, system andinverter efficiencies over the whole monitored period were 8.8, 7.6 and 86.8%, respectively. The main losses of the system were inverter DC/AC conversion loss, inverterthreshold loss and low insolation loss.
LanguageEnglish
Pages353-368
JournalProgress in Photovoltaics
Volume15
DOIs
Publication statusPublished - 9 Jan 2007

Fingerprint

Incident solar radiation
Roofs

Keywords

  • monitoring
  • grid-connected photovoltaics
  • performance ratio
  • PV efficiency
  • inverter efficiency

Cite this

@article{80dd3f2504284510b3d0a3b32799ec7b,
title = "The Effect of Low Insolation Conditions and Inverter Oversizing on the Long-Term Performance of a Grid-Connected Photovoltaic System",
abstract = "The performance of a roof mounted grid-connected photovoltaic (PV) system inNorthern Ireland was monitored over 3 years on annual, seasonal and monthly bases.The overall system performance was adversely affected by low insolation conditions;19{\%} of total incident insolation was absorbed at irradiance level below 200 W/m2 and67{\%} below 600 W/m2, only 6.2{\%} above 900 W/m2. In summer and winter, the PVandsystem efficiencies were 9.0 and 8.5{\%}, and 7.8 and 7.5{\%}, respectively and inverterefficiencies were 86.8 and 85.8{\%}, respectively. The inverter for this particular systemwas oversized; 77{\%} of the total DC energy produced when inverter’s operating loadwas 50{\%} of its rated capacity. The annual average monthly system performance ratio(PR) was 0.61 with seasonal variation 0.59 to 0.63. The average monthly PV, system andinverter efficiencies over the whole monitored period were 8.8, 7.6 and 86.8{\%}, respectively. The main losses of the system were inverter DC/AC conversion loss, inverterthreshold loss and low insolation loss.",
keywords = "monitoring, grid-connected photovoltaics, performance ratio, PV efficiency, inverter efficiency",
author = "Mondol, {Jayanta Deb} and Yigsaw Yohanis and Brian Norton",
year = "2007",
month = "1",
day = "9",
doi = "10.1002/pip.742",
language = "English",
volume = "15",
pages = "353--368",

}

The Effect of Low Insolation Conditions and Inverter Oversizing on the Long-Term Performance of a Grid-Connected Photovoltaic System. / Mondol, Jayanta Deb; Yohanis, Yigsaw; Norton, Brian.

Vol. 15, 09.01.2007, p. 353-368.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The Effect of Low Insolation Conditions and Inverter Oversizing on the Long-Term Performance of a Grid-Connected Photovoltaic System

AU - Mondol, Jayanta Deb

AU - Yohanis, Yigsaw

AU - Norton, Brian

PY - 2007/1/9

Y1 - 2007/1/9

N2 - The performance of a roof mounted grid-connected photovoltaic (PV) system inNorthern Ireland was monitored over 3 years on annual, seasonal and monthly bases.The overall system performance was adversely affected by low insolation conditions;19% of total incident insolation was absorbed at irradiance level below 200 W/m2 and67% below 600 W/m2, only 6.2% above 900 W/m2. In summer and winter, the PVandsystem efficiencies were 9.0 and 8.5%, and 7.8 and 7.5%, respectively and inverterefficiencies were 86.8 and 85.8%, respectively. The inverter for this particular systemwas oversized; 77% of the total DC energy produced when inverter’s operating loadwas 50% of its rated capacity. The annual average monthly system performance ratio(PR) was 0.61 with seasonal variation 0.59 to 0.63. The average monthly PV, system andinverter efficiencies over the whole monitored period were 8.8, 7.6 and 86.8%, respectively. The main losses of the system were inverter DC/AC conversion loss, inverterthreshold loss and low insolation loss.

AB - The performance of a roof mounted grid-connected photovoltaic (PV) system inNorthern Ireland was monitored over 3 years on annual, seasonal and monthly bases.The overall system performance was adversely affected by low insolation conditions;19% of total incident insolation was absorbed at irradiance level below 200 W/m2 and67% below 600 W/m2, only 6.2% above 900 W/m2. In summer and winter, the PVandsystem efficiencies were 9.0 and 8.5%, and 7.8 and 7.5%, respectively and inverterefficiencies were 86.8 and 85.8%, respectively. The inverter for this particular systemwas oversized; 77% of the total DC energy produced when inverter’s operating loadwas 50% of its rated capacity. The annual average monthly system performance ratio(PR) was 0.61 with seasonal variation 0.59 to 0.63. The average monthly PV, system andinverter efficiencies over the whole monitored period were 8.8, 7.6 and 86.8%, respectively. The main losses of the system were inverter DC/AC conversion loss, inverterthreshold loss and low insolation loss.

KW - monitoring

KW - grid-connected photovoltaics

KW - performance ratio

KW - PV efficiency

KW - inverter efficiency

U2 - 10.1002/pip.742

DO - 10.1002/pip.742

M3 - Article

VL - 15

SP - 353

EP - 368

ER -