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Considering the Variability of Soiling in Long-Term PV Performance Forecasting
Abstract
This study presents the development of a methodology for evaluating the variability associated with soiling on long-term photovoltaic (PV) forecasting. Independent engineering firms typically build forecasts for large PV plants through the use of the PVsyst software, where monthly soiling losses are one of many inputs to the P50 model. Subsequently, long-term performance distributions are constructed through a Monte Carlo analysis that includes various factors, such as satellite irradiance modeling uncertainty, uncertainty in the PVsyst model, and long-term irradiance variability. Often the PVsyst model uncertainty is increased to account for sites with significant soiling concerns but no systematic method has been presented in the literature to specifically include soiling variability within long-term performance uncertainty. In this work soiling information from 16 sites in the U.S. Southwest are combined with 24 years of rainfall data to generate 24 years of energy production with soiling losses and then subsequently generate probability of exceedance values (e.g., P50, P90, P95…). The results show that the size of the 90% confidence interval (P5–P95) can increase from –0.7% to 10.1% when interannual soiling variability and soiling rate uncertainty is included.
- Authors:
-
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Leidos, Denver, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- OSTI Identifier:
- 1999659
- Report Number(s):
- NREL/JA-5K00-87429
Journal ID: ISSN 2156-3381; MainId:88204;UUID:19279bfb-2f5e-4658-95b4-c8ba03158519;MainAdminID:70533
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- IEEE Journal of Photovoltaics
- Additional Journal Information:
- Journal Volume: 13; Journal Issue: 6; Journal ID: ISSN 2156-3381
- Publisher:
- IEEE
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 14 SOLAR ENERGY; interannual variability; p-values; performance forecasting; photovoltaic soiling; uncertainty
Citation Formats
Muller, Matthew, and Rashed, Faisal. Considering the Variability of Soiling in Long-Term PV Performance Forecasting. United States: N. p., 2023.
Web. doi:10.1109/JPHOTOV.2023.3300369.
Muller, Matthew, & Rashed, Faisal. Considering the Variability of Soiling in Long-Term PV Performance Forecasting. United States. https://doi.org/10.1109/JPHOTOV.2023.3300369
Muller, Matthew, and Rashed, Faisal. Mon .
"Considering the Variability of Soiling in Long-Term PV Performance Forecasting". United States. https://doi.org/10.1109/JPHOTOV.2023.3300369.
@article{osti_1999659,
title = {Considering the Variability of Soiling in Long-Term PV Performance Forecasting},
author = {Muller, Matthew and Rashed, Faisal},
abstractNote = {This study presents the development of a methodology for evaluating the variability associated with soiling on long-term photovoltaic (PV) forecasting. Independent engineering firms typically build forecasts for large PV plants through the use of the PVsyst software, where monthly soiling losses are one of many inputs to the P50 model. Subsequently, long-term performance distributions are constructed through a Monte Carlo analysis that includes various factors, such as satellite irradiance modeling uncertainty, uncertainty in the PVsyst model, and long-term irradiance variability. Often the PVsyst model uncertainty is increased to account for sites with significant soiling concerns but no systematic method has been presented in the literature to specifically include soiling variability within long-term performance uncertainty. In this work soiling information from 16 sites in the U.S. Southwest are combined with 24 years of rainfall data to generate 24 years of energy production with soiling losses and then subsequently generate probability of exceedance values (e.g., P50, P90, P95…). The results show that the size of the 90% confidence interval (P5–P95) can increase from –0.7% to 10.1% when interannual soiling variability and soiling rate uncertainty is included.},
doi = {10.1109/JPHOTOV.2023.3300369},
journal = {IEEE Journal of Photovoltaics},
number = 6,
volume = 13,
place = {United States},
year = {Mon Aug 28 00:00:00 EDT 2023},
month = {Mon Aug 28 00:00:00 EDT 2023}
}
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