TY - GEN
T1 - Accuracy Challenges in Non-contact Module I-V Measurements
AU - Field, Halden
AU - Tamizhmani, Govindasamy
N1 - Funding Information:
This material is based upon work supported by the Department of Energy, Office of Energy Efficiency and Renewable Energy (EERE), under Award Number DE-EE-0008165 (PVRD2).
Publisher Copyright:
© 2021 IEEE.
PY - 2021/6/20
Y1 - 2021/6/20
N2 - Many techniques can help locate failing and failed PV modules in a field. However, quantifying module performance relative to warranty thresholds requires measuring the electrical quantities of the modules in question. Simultaneous I-V measurement of all modules in a string is possible, removing irradiance and spectral irradiance as variables in interpreting such measurements that would otherwise be performed sequentially. Performing such measurements without making electrical connection to the individual modules would provide additional benefits of reduced time, risk, and worker hardship. We found that such measurements are possible, but are challenged by inaccuracies involving probing technique and site conditions. Future work to understand the sources of these inaccuracies may enable their mitigation, enabling such measurements to be practical, frequent, and predictive of upcoming module failures.
AB - Many techniques can help locate failing and failed PV modules in a field. However, quantifying module performance relative to warranty thresholds requires measuring the electrical quantities of the modules in question. Simultaneous I-V measurement of all modules in a string is possible, removing irradiance and spectral irradiance as variables in interpreting such measurements that would otherwise be performed sequentially. Performing such measurements without making electrical connection to the individual modules would provide additional benefits of reduced time, risk, and worker hardship. We found that such measurements are possible, but are challenged by inaccuracies involving probing technique and site conditions. Future work to understand the sources of these inaccuracies may enable their mitigation, enabling such measurements to be practical, frequent, and predictive of upcoming module failures.
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U2 - 10.1109/PVSC43889.2021.9518906
DO - 10.1109/PVSC43889.2021.9518906
M3 - Conference contribution
AN - SCOPUS:85115971952
T3 - Conference Record of the IEEE Photovoltaic Specialists Conference
SP - 1647
EP - 1650
BT - 2021 IEEE 48th Photovoltaic Specialists Conference, PVSC 2021
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 48th IEEE Photovoltaic Specialists Conference, PVSC 2021
Y2 - 20 June 2021 through 25 June 2021
ER -