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BS EN IEC 60904-1:2020

BS EN IEC 60904-1:2020

$167.15

Photovoltaic devices – Measurement of photovoltaic current-voltage characteristics

Published By Publication Date Number of Pages
BSI 2020 40
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IEC 60904-1:2020 describes procedures for the measurement of current-voltage characteristics (I-V curves) of photovoltaic (PV) devices in natural or simulated sunlight. These procedures are applicable to a single PV solar cell, a sub-assembly of PV solar cells, or a PV module. This document is applicable to non-concentrating PV devices for use in terrestrial environments, with reference to (usually but not exclusively) the global reference spectral irradiance AM1.5 defined in IEC 60904-3. This third edition cancels and replaces the second edition published in 2006. The main changes with respect to the previous edition are as follows: – Updated scope to include all conditions. – Added terms and definitions. – Reorganised document to avoid unnecessary duplication. – Added data analysis clause. – Added informative annexes (area measurement, PV devices with capacitance, dark I-V curves and effect of spatial non-uniformity of irradiance).

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA(normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
9 FOREWORD
11 1 Scope
2 Normative references
12 3 Terms and definitions
13 4 General requirements
4.1 General
Figures
Figure 1 – Schematic current-voltage characteristic (I-V curve) depicting typical I-V curve parameters short-circuit current (Isc), open-circuit voltage (Voc), maximum power (Pmax), voltage at maximum power (VPmax) and current at maximum power (IPmax)
14 4.2 Measurements
Figure 2 – Schematic power-voltage characteristic (P-V curve) depicting typical I-V curve parameters open-circuit voltage (Voc), maximum power (Pmax)and voltage at maximum power (VPmax)
15 4.3 Stabilisation
4.4 Equivalence to steady-state performance
4.5 Reporting conditions
16 4.6 Translation from test conditions to reporting conditions
5 Apparatus
17 6 Measurements in natural sunlight
6.1 General
18 6.2 Test procedure
19 7 Measurement in simulated sunlight
7.1 General
20 7.2 Test procedure
21 8 Data analysis
8.1 Translation from test conditions to reporting conditions
22 8.2 Extracting I-V curve parameters
8.3 Evaluating measurement uncertainty
23 9 Test report
24 Annex A (informative) Device area measurement
A.1 General
A.2 Definition of device area
A.2.1 General
A.2.2 Total area (At)
A.2.3 Aperture area (Aap)
A.2.4 Designated illumination area (Ada)
A.3 Area measurement of PV devices
25 Figure A.1 – PV module (rectangular)
Figure A.2 – PV module of different geometries (pentagon, trapezoid)
26 Figure A.3 – PV cell (cut corners)
Figure A.4 – PV cell (rounded corners, circle)
27 Annex B (informative) Measurement of current-voltage characteristics for PV devices with capacitance
B.1 General
B.2 Definitions
B.3 Relative error due to capacitance
28 Figure B.1 – Equivalent circuit diagram for device exhibiting a capacitance effect
Figure B.2 – Three I-V curves (steady-state, forward sweep and reverse sweep) showing the effect of device capacitance on the curve shape
29 B.4 Methodologies to suppress the measurement error
B.4.1 General
B.4.2 Measurement at steady-state conditions
Figure B.3 – Deviation of maximum power (Pmax) determined from I-V curve due to the effect of device capacitance with respect to steady-state resultas a function of sweep rate
30 B.4.3 Measurement at quasi-steady-state conditions
B.4.4 Common methods for characterisation of capacitive PV devices
31 B.5 Report
B.6 Reference documents
33 Annex C (informative) Measurement of photovoltaic current-voltage characteristics without illumination (dark I-V)
C.1 General
Figure C.1 – I-V characteristics without illumination (dark I-V curve)
34 C.2 Apparatus
C.3 Procedure
C.3.1 General
Figure C.2 – I-V characteristics under illumination (I-V curve)
35 C.3.2 Dark I-V curve measurements
36 Annex D (informative) Influence of spatial non-uniformity of irradiance on I-V curve parameters
D.1 General
37 D.2 Reference documents
Figure D.1 – Monte-Carlo simulation of a 60-cell PV module with high shunt cell type
38 Bibliography

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BS EN IEC 60904-1:2020
$167.15