IEC 60891:2009 defines procedures to be followed for temperature and irradiance corrections to the measured I-V (current-voltage) characteristics of photovoltaic devices. It also defines the procedures used to determine factors relevant for these corrections. Requirements for I-V measurement of photovoltaic devices are laid down in IEC 60904-1. The main technical changes with regard the previous edition are as follows: – extends edition 1 translation procedure to irradiance change during I-V measurement; – adds 2 new translation procedures; – revises procedure for determination of temperature coefficients to include PV modules; – defines new procedure for determination of internal series resistance; – defines new procedure for determination of curve correction factor.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 6<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | 1 Scope 2 Normative references 3 Correction procedures 3.1 General <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 3.2 Correction procedure 1 <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 3.3 Correction procedure 2 <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 3.4 Correction procedure 3 <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | Figures Figure 1 \u2013 Example of the correction of the I-V characteristics by Equations (6) and (7) <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 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 Equations (8) and (9) <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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 | ||||||
| 15<\/td>\n | 4 Determination of temperature coefficients 4.1 General 4.2 Apparatus Figure 4 \u2013 Schematic diagram of the processes for correcting the I-V characteristics to various ranges of irradiance and temperature based on four measured characteristics <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3 Procedure in natural sunlight Figure 5 \u2013 Positions for measuring the temperature of the test module behind the cells <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 4.4 Procedure with a solar simulator 4.5 Calculation of temperature coefficients 5 Determination of internal series resistance RS and R’S 5.1 General <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.2 Correction procedure 1 Figure 6 \u2013\u00a0Determination of internal series resistance <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.3 Correction procedure 2 <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6 Determination of the curve correction factor k and k’ 6.1 General 6.2 Procedure Figure 7 \u2013 Determination of VOC irradiance correction factor and internal series resistance <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 7 Reporting Figure 8 \u2013 Determination of curve correction factor <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Photovoltaic devices. Procedures for temperature and irradiance corrections to measured I-V characteristics<\/b><\/p>\n |