TY - CHAP A1 - Wachter, M. A1 - Gottschalk, L. A1 - Simmler, M. A1 - Schulze, Achim A1 - Becker, F. A1 - Sayala, M. A1 - Hüttl, B. T1 - Short-cicuit current measurement at clear-sky conditions on photovoltaik modules T2 - Proceedings of the 32nd EU-PVSEC KW - Photovoltaik KW - Short circuit current measurement Y1 - 2016 ER - TY - CHAP A1 - Kaiser, D. A1 - Simmler, M. A1 - Wachter, M. A1 - Becker, F. A1 - Sayala, M. A1 - Kaden, T. A1 - Schulze, Achim A1 - Hüttl, B. T1 - Concept for fast and precise PV Module Outdoor Characterization T2 - Proceedings of the 31st EU-PVSEC KW - Photovoltaik Y1 - 2015 ER - TY - CHAP A1 - Wachter, M. A1 - Gottschalk, L. A1 - Simmler, M. A1 - Schulze, Achim A1 - Becker, F. A1 - Sayala, M. A1 - Hüttl, B. T1 - Short Circuit Current Measurements at Clear-Sky Conditions on Photovoltaic Modules: Basic for a Reliable Self-Reference Algorithm T2 - Proc. 32nd European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) N2 - Outdoor or just on site analyzes of photovoltaic modules can offer some advantages in comparison to indoor Lab studies. In this way the electrical performance is monitored and logged under natural operating conditions in full range of irradiation and temperature. The entirety of monitored IV data allows deriving low-light characteristics of electric parameters, temperature coefficients and root cause analysis for possible degradation. We apply so-called self-reference algorithm in order to increase the accuracy of analysis. The improved precision is due to application of effective acting irradiation and effective temperature instead of externally measured data. Effective irradiation is determined in self-referencing scheme: the short circuit current of the module is assigned to the irradiation. This assignment has to be calibrated, preferably at standard test conditions for irradiation. In this contribution we demonstrate a process of precise measurement of Isc under clear-sky outdoor conditions and the determination of the short circuit current for STC. The measurement method avoids errors by spectral deviations with respect to AM 1.5G spectrum, by optical reflection losses for high angles of incidence and errors by high albedo impact. In particular we investigate comparatively a CdTe module under outdoor conditions and by means a calibrated indoor Lab flasher. KW - Photovoltaic systems, Metrology, Solar Modules Y1 - 2016 PB - 32nd European Photovoltaic Solar Energy Conference and Exhibition (PVSEC) ER - TY - CHAP A1 - Hüttl, B. A1 - Wachter, M. A1 - Gottschalk, L. A1 - Schulze, Achim A1 - Becker, F. T1 - Self Reference Algorithm for Precise Outdoor Characterization of PV Modules T2 - PV-Days Halle 2016 N2 - Outdoor or just on site analyzes of photovoltaic modules can offer some advantages in comparison to indoor Lab stud-ies. In this way the electrical performance is monitored and logged under natural operating conditions in full range of irradiation and temperature. The entirety of monitored IV data allows deriving low-light characteristics of electric parameters, temperature coefficients and root cause analysis for possible degradation. We apply so-called self-reference algorithm in order to increase the accuracy of analysis. The improved precision is due to application of effective acting irradiation and effective temperature instead of externally measured data. Effective irradiation is determined in self-referencing scheme: the short circuit current of the module is assigned to the irradiation. KW - Photovoltaic systems, Metrology, Solar Modules Y1 - 2016 PB - PV-Days Halle 2016 CY - Halle ER -