EN 61829-2016 en Photovoltaic (PV) array - On-site measurement of currentvoltage characteristics.pdf

1、BSI Standards PublicationPhotovoltaic (PV) array On-site measurement of current-voltage characteristicsBS EN 61829:2016National forewordThis British Standard is the UK implementation of EN 61829:2016. It is identical to IEC 61829:2015. It supersedes BS EN 61829:1998 which is withdrawn.The UK partici

2、pation in its preparation was entrusted to TechnicalCommittee GEL/82, Photovoltaic Energy Systems.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are respons

3、ible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 78357 9ICS 27.160Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Poli

4、cy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61829:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61829 February 2016 ICS 27.160 Supersedes EN 61829:1998 English Version Photovoltaic (PV) array - On-site me

5、asurement of current-voltage characteristics (IEC 61829:2015) Champ de modules photovoltaques (PV) - Mesurage sur site des caractristiques courant-tension (IEC 61829:2015) Photovoltaische (PV) Modulgruppen - Messen der Strom-/Spannungskennlinien am Einsatzort (IEC 61829:2015) This European Standard

6、was approved by CENELEC on 2015-11-26. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s

7、uch national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member in

8、to its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of

9、Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit

10、 Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61829:2016 E BS EN 618

11、29:2016EN 61829:2016 2 European foreword The text of document 82/1008/FDIS, future edition 2 of IEC 61829, prepared by IEC/TC 82 “Solar photovoltaic energy systems“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61829:2016. The following dates are fixed: latest date by

12、which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2016-08-26 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2019-02-26 This document supersedes EN 61829:1998. Atten

13、tion is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61829:2015 was approved by CE

14、NELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60904-5 NOTE Harmonized as EN 60904-5. IEC 61853-1:2011 NOTE Harmonized as EN 61853-1:2011 (not modified). ISO/IEC 17025 NOTE Harmon

15、ized as EN ISO/IEC 17025. BS EN 61829:2016EN 61829:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its app

16、lication. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies

17、. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu Publication Year Title EN/HD Year IEC 60891 - Photovoltaic devices - Procedures for temperature and irradiance corrections to measured I-V characteristics EN 60891

18、- IEC 60904-1 - Photovoltaic devices - Part 1: Measurement of photovoltaic current-voltage characteristics EN 60904-1 - IEC 60904-2 - Photovoltaic devices - Part 2: Requirements for photovoltaic reference devices EN 60904-2 - IEC 60904-3 - Photovoltaic devices - Part 3: Measurement principles for te

19、rrestrial photovoltaic (PV) solar devices with reference spectral irradiance data EN 60904-3 - IEC 60904-4 - Photovoltaic devices - Part 4: Reference solar devices - Procedures for establishing calibration traceability EN 60904-4 - IEC 60904-7 - Photovoltaic devices - Part 7: Computation of the spec

20、tral mismatch correction for measurements of photovoltaic devices EN 60904-7 - IEC 60904-10 - Photovoltaic devices - Part 10: Methods of linearity measurement EN 60904-10 - BS EN 61829:2016 2 IEC 61829:2015 IEC 2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope 6 2 Normative references 6 3 Terms an

21、d definitions 7 4 Apparatus 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 Con

22、firm uniformity of irradiance 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 Rec

23、ord spectral data . 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

24、 to the desired test 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 extr

25、eme and central modules . 13 BS EN 61829:2016IEC 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 standardiz

26、ation comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes Internat

27、ional Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in

28、 this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the

29、two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have

30、the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misint

31、erpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding nationa

32、l or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services car

33、ried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Co

34、mmittees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn

35、 to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not b

36、e held responsible for identifying 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 re

37、vision. This edition includes the following 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

38、removes and replaces procedures with references to other updated and pertinent standards, including the IEC 60904 series, and IEC 60891. BS EN 61829:2016 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:

39、FDIS Report on voting 82/1008/FDIS 82/1041/RVD Full 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 c

40、ontents of this publication will remain unchanged until 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. BS EN 61829:

41、2016IEC 61829:2015 IEC 2015 5 INTRODUCTION The performance of photovoltaic (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-l

42、evel operating output can detect underperforming arrays but are not 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 troubleshoo

43、ting for modules, strings and arrays. This International Standard specifies 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

44、 of I-V curve measurement procedures helps to ensure that a PV systems performance is adequately characterized over time. BS EN 61829:2016 6 IEC 61829:2015 IEC 2015 PHOTOVOLTAIC (PV) ARRAY ON-SITE MEASUREMENT OF CURRENT-VOLTAGE CHARACTERISTICS 1 Scope This International Standard specifies procedures

45、 for on-site measurement of flat-plate photovoltaic (PV) array characteristics, the accompanying 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-

46、site conditions and their translation to reference test conditions (RTC) can provide: 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 laborator

47、y or factory measurements; detection of possible performance degradation of modules and 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 resul

48、ts previously obtained in a laboratory or factory for that module. Corrections for differences 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 sha

49、ding, 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-arrays of different tilt, orientation, technology, or electrical configuration, the procedure specified in this International Standard is applied to each unique PV sub-array of interest. 2 Normative references The following documents, in whole or in part, are normatively refer