Measuring Degradation Rates Without Irradiance Data

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A method to report PV system degradation rates without using irradiance data is demonstrated. First, a set of relative degradation rates are determined by comparing daily AC final yields from a group of PV systems relative to the average final yield of all the PV systems. Then, the difference between relative and absolute degradation rates is found from a statistical analysis. This approach is verified by comparing to methods that utilize irradiance data. This approach is significant because PV systems are often deployed without irradiance sensors, so the analysis method described here may enable measurements of degradation using data that ... continued below

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9 p.

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Pulver, S.; Cormode, D.; Cronin, A.; Jordan, D.; Kurtz, S. & Smith, R. February 1, 2011.

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Description

A method to report PV system degradation rates without using irradiance data is demonstrated. First, a set of relative degradation rates are determined by comparing daily AC final yields from a group of PV systems relative to the average final yield of all the PV systems. Then, the difference between relative and absolute degradation rates is found from a statistical analysis. This approach is verified by comparing to methods that utilize irradiance data. This approach is significant because PV systems are often deployed without irradiance sensors, so the analysis method described here may enable measurements of degradation using data that were previously thought to be unsuitable for degradation studies.

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9 p.

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  • 35th IEEE Photovoltaic Specialists Conference (PVSC '10), 20-25 June 2010, Honolulu, Hawaii

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  • Report No.: NREL/CP-5200-47597
  • Grant Number: AC36-08GO28308
  • Office of Scientific & Technical Information Report Number: 1007339
  • Archival Resource Key: ark:/67531/metadc833888

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  • February 1, 2011

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

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  • April 6, 2017, 3:31 p.m.

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Pulver, S.; Cormode, D.; Cronin, A.; Jordan, D.; Kurtz, S. & Smith, R. Measuring Degradation Rates Without Irradiance Data, article, February 1, 2011; Golden, Colorado. (digital.library.unt.edu/ark:/67531/metadc833888/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.