This document defines procedures to be followed for temperature and irradiance corrections to the measured I-V (current-voltage) characteristics (also known as I-V curves) of photovoltaic (PV) devices. It also defines the procedures used to determine factors relevant to these corrections. Requirements for I-V measurement of PV devices are laid down in IEC 60904-1 and its relevant subparts. The PV devices include a single solar cell with or without a protective cover, a sub-assembly of solar cells, or a module. A different set of relevant parameters for I-V curve correction applies for each type of device. The determination of temperature coefficients for a module (or subassembly of cells) may be calculated from single cell measurements, but this is not the case for the internal series resistance and curve correction factor, which should be separately measured for a module or subassembly of cells. Refer to Annex A for alternative procedures for series resistance determination. The use of I-V correction parameters are valid for the PV device for which they have been measured. Variations may occur within a production lot or the type class.<\/p>\n
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| 1<\/td>\n | 30452786 <\/td>\n<\/tr>\n | ||||||
| 53<\/td>\n | A-30369160 <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 3 Terms and definitions, symbols and abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | 4 Correction procedures 4.1 General <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | Table 1 \u2013 Overview of correction procedures for irradiance corrections (i.e. T1 = T2) <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | Table 2 \u2013 Overview of correction procedures for temperature corrections (i.e. G1 = G2) <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 4.2 Correction procedure 1 <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | 4.3 Correction procedure 2 <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 4.4 Correction procedure 3 4.4.1 General 4.4.2 Correction for the irradiance and temperature from two measured I-V curves <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | Figures Figure 1 \u2013 Example of the correction of the I-V characteristics byformulae (10) and (11) Figure 2 \u2013 Schematic diagram of the relation of G3 and T3 which can be chosen in the simultaneous correction for irradiance and temperature, for a fixed set of T1, G1, T2,and G2 by formulae (12) and (13) <\/td>\n<\/tr>\n | ||||||
| 73<\/td>\n | 4.4.3 Correction to various irradiances and temperatures from three I-V curves 4.4.4 Correction to various irradiances and temperatures from four measured I-V curves Figure 3 \u2013 Schematic diagram of the processes for correcting the I-V characteristics to various ranges of irradiance and temperature based on three measured characteristics <\/td>\n<\/tr>\n | ||||||
| 74<\/td>\n | 4.5 Correction procedure 4 Figure 4 \u2013 Schematic diagram of the processes for correcting the I-V characteristicsto various ranges of irradiance and temperature based on four measured characteristics <\/td>\n<\/tr>\n | ||||||
| 76<\/td>\n | 5 Determination of temperature coefficients 5.1 General 5.2 Apparatus <\/td>\n<\/tr>\n | ||||||
| 77<\/td>\n | Figure 5 \u2013 Example positions for measuring the temperatureof the test module behind the cells <\/td>\n<\/tr>\n | ||||||
| 78<\/td>\n | 5.3 Procedure in natural or steady-state simulated sunlight <\/td>\n<\/tr>\n | ||||||
| 79<\/td>\n | 5.4 Procedure with a pulsed solar simulator 5.5 Calculation of temperature coefficients <\/td>\n<\/tr>\n | ||||||
| 80<\/td>\n | 6 Determination of internal series resistance RS and R’S 6.1 General <\/td>\n<\/tr>\n | ||||||
| 81<\/td>\n | 6.2 Determination of RS in correction procedures 1 and 4 <\/td>\n<\/tr>\n | ||||||
| 82<\/td>\n | Figure 6 \u2013 Determination of internal series resistance <\/td>\n<\/tr>\n | ||||||
| 83<\/td>\n | 6.3 Determination of B1 and B2 in correction procedure 2 Figure 7 \u2013 Determination of internal series resistance when the corrected I-V characteristics intersect <\/td>\n<\/tr>\n | ||||||
| 84<\/td>\n | 6.4 Determination of R(S in correction procedure 2 <\/td>\n<\/tr>\n | ||||||
| 85<\/td>\n | Figure 8 \u2013 Determination of irradiance correction factors B1 and B2 and internal series resistance, R’S <\/td>\n<\/tr>\n | ||||||
| 86<\/td>\n | 6.5 Determination of RS in correction procedure 4 <\/td>\n<\/tr>\n | ||||||
| 87<\/td>\n | 7 Determination of the curve correction factor \u03ba and \u03ba’ 7.1 General 7.2 Procedure Figure 9 \u2013 Determination of internal series resistanceof a PV module from a single I-V curve <\/td>\n<\/tr>\n | ||||||
| 88<\/td>\n | 8 Reporting Figure 10 \u2013 Determination of curve correction factor <\/td>\n<\/tr>\n | ||||||
| 90<\/td>\n | Annex A (informative)Alternative procedures for series resistance determination A.1 General A.2 Differential resistance at VOC against inverse irradiance method Figure A.1 \u2013 Determination of internal series resistance <\/td>\n<\/tr>\n | ||||||
| 91<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Photovoltaic devices. Procedures for temperature and irradiance corrections to measured I-V characteristics<\/b><\/p>\n |