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PV Lifetime Project: Measuring PV Module PerformanceDegradation: 2018 Indoor Flash TestingResults

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Stein, Joshua S.; Robinson, Charles D.; King, Bruce H.; Deline, Chris; Rummel, Steve; Sekulic, Bill

Photovoltaic (PV) module and system performance degradation is being measured by periodic flash testing of fielded PV modules at three sites. As of early 2018, results from modules fielded in New Mexico and Colorado are now available. These data indicate that module degradation varies significantly between module types and can also vary between modules of the same model. In addition, degradation rates for some module types appear to vary over time. Great care is made to control for stability and repeatability in the measurements over time, but there is still a +/-0.5% uncertainty in flash test stability. Therefore, it will take several more years for degradation rate results to be known with higher confidence.

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TYPE Conference Poster YEAR 2018
ScopusOSTI

Comparative Review of High Resolution Monitoring Versus Standard Inverter Data Acquisition for a Single Photovoltaic Power Plant

2018 IEEE 7th World Conference on Photovoltaic Energy Conversion, WCPEC 2018 - A Joint Conference of 45th IEEE PVSC, 28th PVSEC and 34th EU PVSEC

Jones, C.B.; Ellis, Benjamin H.; Stein, Joshua S.; Walters, Joseph

Investing in data monitoring equipment will help ensure that the PV array is operating as expected. Monitoring systems can be designed to limit extensive downtime that would result in lost revenue. New, higher resolutionsystems can also be used to quantify performance using detailed characterization techniques. The Pordis 140A system can extract current and voltage (I-V) while the PV system remains connected to the grid. However,the added visibility for plant owners, investors, and operators is currently not well understood. Therefore, the present work provides an overview of the I-V tracing system in comparison to a typical, inverter data acquisitionsystem for two systems located in Albuquerque, New Mexico. The review includes a description of basic energy yield calculations, degradation analysis, and abnormal behavior diagnostics.

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TYPE Conference Poster YEAR 2018
ScopusOSTIDOI
Results 51–75 of 292
Results 51–75 of 292