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Developing a New I‐V Translation Methodology in Accordance With IEC 60891:2021 Correction Procedure 1 and 2.

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Bibliographic Details
Title:	Developing a New I‐V Translation Methodology in Accordance With IEC 60891:2021 Correction Procedure 1 and 2.
Authors:	Xu, Wenhao¹ (AUTHOR) frank.xu@tuv.com, Zhang, Yating¹ (AUTHOR), Liu, Mengdi¹ (AUTHOR), Monokroussos, Christos¹ (AUTHOR), Herrmann, Werner² (AUTHOR), Bardizza, Giorgio² (AUTHOR), Müllejans, Harald³ (AUTHOR)
Source:	Progress in Photovoltaics. Jun2026, Vol. 34 Issue 6, p708-717. 10p.
Subjects:	Current-voltage curves, Gompertz functions (Mathematics), Calibration, Solar radiation, International Electrotechnical Commission, Photovoltaic power generation
Abstract:	Accurate translation of photovoltaic (PV) module I‐V curves under varying operating conditions is essential for evaluating module performance and ensuring reliable energy output predictions. This study proposes a hybrid correction procedure (HCP) for I‐V curves, utilizing a four‐parameter Gompertz model to integrate the strengths of CP1 and CP2, thereby unifying the two approaches into a cohesive framework. It further evaluates the performance of HCP alongside existing correction methods (CP1 and CP2) across a broad range of irradiance (G) and module temperature (Tm) conditions. CP1 demonstrates the highest accuracy in PMAX correction, with RMSE values consistently below 0.50% for most modules, but fails to generate complete I‐V curves when translating from low to high‐irradiance levels. CP2, while achieving superior accuracy in VOC correction, struggles with low‐Rsh modules, leading to distorted I‐V curves and reduced accuracy in PMAX and ISC. The proposed HCP method successfully integrates the strengths of CP1 and CP2. It achieves ISC results comparable to CP1, VOC results similar to CP2, and significantly lower RMSE in PMAX compared to CP2, particularly under challenging low‐Rsh and high‐RS conditions. These findings validate the effectiveness of HCP as a robust alternative correction method for improving the accuracy of I‐V curve translations under diverse real‐world operating conditions. This work provides a pathway to more accurate PV module performance analysis and highlights the importance of addressing Rsh and RS effects in future correction procedures. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Accurate translation of photovoltaic (PV) module I‐V curves under varying operating conditions is essential for evaluating module performance and ensuring reliable energy output predictions. This study proposes a hybrid correction procedure (HCP) for I‐V curves, utilizing a four‐parameter Gompertz model to integrate the strengths of CP1 and CP2, thereby unifying the two approaches into a cohesive framework. It further evaluates the performance of HCP alongside existing correction methods (CP1 and CP2) across a broad range of irradiance (G) and module temperature (Tm) conditions. CP1 demonstrates the highest accuracy in PMAX correction, with RMSE values consistently below 0.50% for most modules, but fails to generate complete I‐V curves when translating from low to high‐irradiance levels. CP2, while achieving superior accuracy in VOC correction, struggles with low‐Rsh modules, leading to distorted I‐V curves and reduced accuracy in PMAX and ISC. The proposed HCP method successfully integrates the strengths of CP1 and CP2. It achieves ISC results comparable to CP1, VOC results similar to CP2, and significantly lower RMSE in PMAX compared to CP2, particularly under challenging low‐Rsh and high‐RS conditions. These findings validate the effectiveness of HCP as a robust alternative correction method for improving the accuracy of I‐V curve translations under diverse real‐world operating conditions. This work provides a pathway to more accurate PV module performance analysis and highlights the importance of addressing Rsh and RS effects in future correction procedures. [ABSTRACT FROM AUTHOR]
ISSN:	10627995
DOI:	10.1002/pip.70092