Interlaboratory Comparison of the PV Module Energy Rating Standard IEC 61853-3

Vogt, Malte and Riechelmann, Stefan and Gracia Amillo, Ana and Driesse, Anton and Kokka, Alexander and Maham, Kinza and Kärhä, Petri and Kenny, Robert P. and Schinke, Carsten and Bothe, Karsten and Blakesley, James C. and Music, E and Plag, Fabian and Friesen, Gabi and Corbellini, Gianluca and Riedel, Nicolas and Valckenborg, Roland and Schweiger, Marcus and Herrmann, Werner (2020) Interlaboratory Comparison of the PV Module Energy Rating Standard IEC 61853-3. In: Procceedings 37th European Photovoltaic Solar Energy Conference 37th European Photovoltaic Solar Energy Conference and Exhibition, 7-11 September 2020, Online Edition.

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Abstract

The IEC 61853 standard series “Photovoltaic (PV) module performance testing and energy rating” aims to provide a standardized measure for PV module performance, namely the Climate Specific Energy Rating (CSER). An algorithm to calculate CSER is specified in part 3 based on laboratory measurements defined in parts 1 and 2 as well as the climate data set given in part 4. To test the comparability and clarity of the algorithm in part 3, we share the same input data, obtained by measuring a standard photovoltaic module, among different research organizations. Each participant then uses their individual implementations of the algorithm to calculate the resulting CSER values. The initial blind comparison reveals differences of 0.133 (14.7%) in CSER between the ten different implementations of the algorithm. Despite the differences in CSER, an analysis of intermediate results revealed differences of less than 1% at each step of the calculation chain among at least three participants. Thereby, we identify the extrapolation of the power table, the handling of the differences in the wavelength bands between measurement and climate data set, and several coding errors as the three biggest sources for the differences. After discussing the results and comparing different approaches, all participants rework their implementations individually and compare the results two more times. In the third intercomparison, the differences are less than 0.029 (3.2%) in CSER. When excluding the remaining three outliers, the largest absolute difference between the other seven participants is 0.0037 (0.38%). Based on our findings we identified four recommendations for improvement of the standard series.

Item Type:	Article in conference proceedings or Presentation at a conference (Paper)
Subjects:	Engineering > Electronic & electrical engineering > Electrical power
Department/unit:	Dipartimento ambiente costruzioni e design > Istituto sostenibilità applicata all'ambiente costruito
Depositing User:	Gabriele Friesen
Date Deposited:	02 Dec 2020 16:27
Last Modified:	02 Dec 2020 16:37
URI:	http://repository.supsi.ch/id/eprint/12159

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