Presentation Details
| Measurement uncertainty of STC maximum power degradation of photovoltaic modules Xin Huang1, He Wang1, Youzhang Zhu2, Haibo Niu2, Hong Yang1. 1Xi’an Jiaotong University, Xi’an, China.2Universities of Shaanxi Province, Xi’an, China |
Abstract
Measurement uncertainties in STC maximum power of PV modules lead to that power degradation cannot be confidently evaluated. In this paper, measurement uncertainty of STC maximum power degradation of PV modules was studied based on the error propagation model. The power degradation threshold used for confidently evaluating whether module power degradation has occurred was determined. The results show that when the standard uncertainties for STC power measurements are 0.55% (reported minimum value), the power degradation thresholds are 0.77%, 1.53% and 2.28% with the confidence probabilities of 68.27%, 95.45% and 99.73%, respectively. The obtained results in this paper are helpful for module stakeholders to understand the importance of measurement uncertainties in methods for power determination on performance degradation evaluation of PV modules.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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