1、 IEC 61829 Edition 2.0 2015-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Photovoltaic (PV) array On-site measurement of current-voltage characteristics Champ de modules photovoltaques (PV) Mesurage sur site des caractristiques courant-tension IEC 61829:2015-10(en-fr) THIS PUBLICATION IS COPYRIGHT
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19、commentaires sur cette publication ou si vous avez des questions contactez-nous: csciec.ch. IEC 61829 Edition 2.0 2015-10 INTERNATIONAL STANDARD NORME INTERNATIONALE Photovoltaic (PV) array On-site measurement of current-voltage characteristics Champ de modules photovoltaques (PV) Mesurage sur site
20、des caractristiques courant-tension INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE ICS 27.160 ISBN 978-2-8322-2966-8 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make
21、 sure that you obtained this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. 2 IEC 61829:2015 IEC 2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms and definitions 7 4 Ap
22、paratus 7 4.1 Irradiance measurements in natural sunlight . 7 4.2 Module temperature measurements 8 4.3 Electrical measurements . 8 5 Measurement procedure 9 5.1 Choose and record appropriate conditions for measurement . 9 5.2 Clean the modules 9 5.3 Check for shading . 9 5.4 Confirm uniformity of i
23、rradiance over the test array . 10 5.5 Mount the reference device . 10 5.6 Prepare to measure the array temperature 10 5.7 Disconnect the array . 11 5.8 Connect the measurement system to the array to be measured 11 5.9 Record electrical data and measurement conditions 11 5.10 Record spectral data .
24、12 5.11 Typical and extreme module selection 12 6 Analysis . 13 6.1 Adjust the measured irradiance for any deviation from reference conditions 13 6.2 Compute the average temperature of the array under test . 13 6.3 Compute the junction temperature 14 6.4 Translate the measurement to the desired test
25、 condition . 14 6.5 Correct for soiling losses 14 7 Test report . 14 Annex A (informative) Reference values and reference device . 16 A.1 Reference test conditions (RTC) . 16 A.2 Standard test conditions (STC) . 16 A.3 Reference device 16 Bibliography 17 Figure 1 Examples of extreme and central modu
26、les . 13 IEC 61829:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PHOTOVOLTAIC (PV) ARRAY ON-SITE MEASUREMENT OF CURRENT-VOLTAGE CHARACTERISTICS FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electr
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37、any or all such patent rights. International Standard IEC 61829 has been prepared by IEC technical committee 82: Solar photovoltaic energy systems. This second edition cancels and replaces the first edition published in 1995. This edition constitutes a technical revision. This edition includes the f
38、ollowing significant technical changes with respect to the previous edition: a) it addresses many outdated procedures; b) it accommodates commonly used commercial I-V curve tracers; c) it provides a more practical approach for addressing field uncertainties; d) it removes and replaces procedures wit
39、h references to other updated and pertinent standards, including the IEC 60904 series, and IEC 60891. 4 IEC 61829:2015 IEC 2015 The result is a much more practical and useful standard. The text of this standard is based on the following documents: FDIS Report on voting 82/1008/FDIS 82/1041/RVD Full
40、information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged un
41、til the stability date indicated on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IEC 61829:2015 IEC 2015 5 INTRODUCTION The performance of photov
42、oltaic (PV) systems over their decades-long life time is determined by comparing measured power production with the expected production as estimated from recorded weather conditions. Continuous measurements of system- or subsystem-level operating output can detect underperforming arrays but are not
43、well suited for tracking degradation with any accuracy, or for identifying the weaknesses or failure modes that may exist within the array. Field I-V curve measurements offer a practical method of in situ benchmarking or troubleshooting for modules, strings and arrays. This International Standard sp
44、ecifies methods and approaches for field I-V curve measurements and calculations, and includes guidance for addressing the uncertainties associated with measurement devices and array configurations. Consistent and proper application of I-V curve measurement procedures helps to ensure that a PV syste
45、ms performance is adequately characterized over time. 6 IEC 61829:2015 IEC 2015 PHOTOVOLTAIC (PV) ARRAY ON-SITE MEASUREMENT OF CURRENT-VOLTAGE CHARACTERISTICS 1 Scope This International Standard specifies procedures for on-site measurement of flat-plate photovoltaic (PV) array characteristics, the a
46、ccompanying meteorological conditions, and use of these for translating to standard test conditions (STC) or other selected conditions. Measurements of PV array current-voltage (I-V) characteristics under actual on-site conditions and their translation to reference test conditions (RTC) can provide:
47、 data for power rating or capacity testing; verification of installed array power performance relative to design specifications; detection of possible differences between on-site module characteristics and laboratory or factory measurements; detection of possible performance degradation of modules a
48、nd arrays with respect to on- site initial data; detection of possible module or array failures or poor performance. For a particular module, on-site measurements translated to STC can be directly compared with results previously obtained in a laboratory or factory for that module. Corrections for d
49、ifferences in the spectral or spatial response of the reference devices may need to be assessed as specified in IEC 60904. On-site array measurements are affected by diode, cable, and mismatch losses, soiling and shading, degradation due to aging, and other uncontrolled effects. Therefore, they are not expected to be equal to the product of the number of modules and the respective module data. If a PV array is formed with sub-a
