EN 61724-1-2017 en Photovoltaic system performance - Part 1 Monitoring.pdf

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1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Photovoltaic system performancePart 1: Monitoring (IEC 61724-1:2017)BS EN 61724-1:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 61724-1May 2017ICS 27.180 Supersedes EN 61724:1998 (partially)English VersionPhotov

2、oltaic system performance - Part 1: Monitoring(IEC 61724-1:2017)Performance dun systme photovoltaque - Partie 1:Surveillance(IEC 61724-1:2017)Betriebsverhalten von Photovoltaik-Systemen - Teil 1:berwachung(IEC 61724-1:2017)This European Standard was approved by CENELEC on 2017-04-07. CENELEC members

3、 are bound to comply with the CEN/CENELECInternal 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 such national standards may be obtained on application to

4、 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 into its own language and notified to the CEN-CENELEC Manag

5、ement 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 Macedonia, France, Germany, Greece, Hungary, Iceland, Irela

6、nd, Italy, Latvia,Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,Switzerland, Turkey and the United Kingdom.European Committee for Electrotechnical StandardizationComit Europen de Normalisation ElectrotechniqueEuropisches K

7、omitee fr Elektrotechnische NormungCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.Ref. No. EN 61724-1:2017 ENational forewordThis British Standard is the UK implementation of

8、 EN 61724-1:2017. It is identical to IEC 61724-1:2017. Together with PD IEC/TS 61724-2:2016 and PD IEC/TS 61724-3:2016 it supersedes BS EN 61724:1998, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GEL/82, Photovoltaic Energy Systems.A list of organiz

9、ations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017I

10、SBN 978 0 580 89972 0ICS 27.160Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedB

11、RITISH STANDARDBS EN 61724-1:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61724-1 May 2017 ICS 27.180 Supersedes EN 61724:1998 (partially) English Version Photovoltaic system performance - Part 1: Monitoring (IEC 61724-1:2017) Performance dun systme photovoltaque - Partie 1: Surveillance

12、 (IEC 61724-1:2017) Betriebsverhalten von Photovoltaik-Systemen - Teil 1: berwachung (IEC 61724-1:2017) This European Standard was approved by CENELEC on 2017-04-07. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

13、Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such 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

14、 (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into 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 committ

15、ees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slova

16、kia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN

17、ELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61724-1:2017 E BS EN 61724-1:2017EN 61724-1:2017 2 European foreword The text of document 82/1215/FDIS, future edition 1 of IEC 61724-1, prepared by IEC/TC 82 “Solar photovoltaic energy s

18、ystems“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61724-1:2017. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2018-01-07 latest date

19、by which the national standards conflicting with the document have to be withdrawn (dow) 2020-04-07 This document supersedes EN 61724:1998 (partially). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC shall not be held resp

20、onsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 61724-1:2017 was approved by CENELEC as a European Standard without any modification. BS EN 61724-1:2017EN 61724-1:2017 3 Annex ZA (normative) Normative references to international pu

21、blications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refer

22、enced 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. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here

23、: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60050-131 - International Electrotechnical Vocabulary (IEV) - Part 131: Circuit theory - - IEC 60904-2 - Photovoltaic devices - Part 2: Requirements for photovoltaic reference devices EN 60904-2 - IEC 60904-3 - Photovoltaic devices - Part 3: Me

24、asurement principles for terrestrial photovoltaic (PV) solar devices with reference spectral irradiance data EN 60904-3 - IEC 60904-5 - Photovoltaic devices - Part 5: Determination of the equivalent cell temperature (ECT) of photovoltaic (PV) devices by the open-circuit voltage method EN 60904-5 - I

25、EC 60904-10 - Photovoltaic devices - Part 10: Methods of linearity measurement EN 60904-10 - IEC 61557-12 - Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 12: Performance measuri

26、ng and monitoring devices (PMD) EN 61557-12 - IEC 62053-21 - Electricity metering equipment (a.c.) - Particular requirements - Part 21: Static meters for active energy (classes 1 and 2) EN 62053-21 - IEC 62053-22 - Electricity metering equipment (a.c.) - Particular requirements - Part 22: Static met

27、ers for active energy (classes 0,2 S and 0,5 S) EN 62053-22 - IEC 62670-3 - EN 62670-3 - IEC 62817 2014 Solar trackers for photovoltaic systems - Design qualification EN 62817 2015 ISO 9060 - Solar energy; specification and classification of instruments for measuring hemispherical solar and direct s

28、olar radiation - - ISO 9488 - Solar energy - Vocabulary EN ISO 9488 - ISO 9846 - Solar energy - Calibration of a pyranometer using a pyrheliometer - - ISO 9847 - Solar energy - Calibration of field pyranometers by comparison to a reference pyranometer - - IEC/TS 61836 - Solar photovoltaic energy sys

29、tems - Terms, definitions and symbols CLC/TS 61836 - ISO/IEC Guide 98-1 - Uncertainty of measurement Part 1: Introduction to the expression of uncertainty in measurement - - BS EN 61724-1:2017EN 61724-1:2017 4 ISO/IEC Guide 98-3 - Uncertainty of measurement - Part 3: Guide to the expression of uncer

30、tainty in measurement (GUM:1995) - - ASTM G 183 - Standard Practice for Field Use of Pyranometers, Pyrheliometers and UV Radiometers - - WMO No 8 - Guide to meteorological instruments and methods of observation - - BS EN 61724-1:2017 2 IEC 61724-1:2017 IEC 2017 CONTENTS FOREWORD . 5 INTRODUCTION . 7

31、 1 Scope 9 2 Normative references 9 3 Terms and definitions 10 4 Monitoring system classification 13 5 General . 13 5.1 Measurement uncertainty 13 5.2 Calibration 14 5.3 Repeated elements . 14 5.4 Power consumption. 14 5.5 Documentation 14 5.6 Inspection . 14 6 Data acquisition timing and reporting

32、. 15 6.1 Sampling, recording, and reporting . 15 6.2 Timestamps 16 7 Measured parameters 16 7.1 General requirements . 16 7.2 Irradiance . 20 7.2.1 On-site irradiance measurement 20 7.2.2 Satellite remote sensing of irradiance 25 7.3 Environmental factors . 26 7.3.1 PV module temperature . 26 7.3.2

33、Ambient air temperature 27 7.3.3 Wind speed and direction 27 7.3.4 Soiling ratio . 28 7.3.5 Rainfall 30 7.3.6 Snow . 30 7.3.7 Humidity 30 7.4 Tracker system . 31 7.4.1 Single-axis trackers . 31 7.4.2 Dual-axis trackers for 20x systems 31 7.5 Electrical measurements . 31 7.6 External system requireme

34、nts . 32 8 Data processing and quality check 32 8.1 Daylight hours . 32 8.2 Quality check 33 8.2.1 Removing invalid readings . 33 8.2.2 Treatment of missing data . 33 9 Calculated parameters . 33 9.1 Overview 33 9.2 Summations 34 9.3 Irradiation . 34 9.4 Electrical energy . 35 9.4.1 General . 35 9.4

35、.2 DC output energy 35 BS EN 61724-1:2017IEC 61724-1:2017 IEC 2017 3 9.4.3 AC output energy . 35 9.5 Array power rating 35 9.5.1 DC power rating. 35 9.5.2 AC power rating . 35 9.6 Yields . 35 9.6.1 General . 35 9.6.2 PV array energy yield 36 9.6.3 Final system yield 36 9.6.4 Reference yield . 36 9.7

36、 Yield losses 36 9.7.1 General . 36 9.7.2 Array capture loss . 36 9.7.3 Balance of systems (BOS) loss 36 9.8 Efficiencies . 37 9.8.1 Array (DC) efficiency . 37 9.8.2 System (AC) efficiency 37 9.8.3 BOS efficiency . 37 10 Performance metrics 37 10.1 Overview 37 10.2 Summations 38 10.3 Performance rat

37、ios . 38 10.3.1 Performance ratio 38 10.3.2 Temperature-corrected performance ratios 39 10.4 Performance indices . 40 11 Data filtering 41 11.1 Use of available data 41 11.2 Filtering data to specific conditions . 41 11.3 Reduced inverter, grid, or load availability 41 Annex A (informative) Sampling

38、 interval 42 A.1 General considerations . 42 A.2 Time constants . 42 A.3 Aliasing error 42 A.4 Example . 43 Annex B (informative) Module backsheet temperature sensor selection and attachment 44 B.1 Objective 44 B.2 Sensor and material selection . 44 B.2.1 Optimal sensor types . 44 B.2.2 Optimal tape

39、s 44 B.2.3 Cyanoacrylate adhesives and backsheet integrity 44 B.3 Sensor attachment method . 45 B.3.1 Permanent versus temporary . 45 B.3.2 Attachment location . 45 B.3.3 Sensor attachment. 45 Annex C (informative) Derate factors . 48 Annex D (normative) Systems with local loads, storage, or auxilia

40、ry sources . 49 D.1 System types 49 D.2 Parameters and formulas 51 BS EN 61724-1:2017 4 IEC 61724-1:2017 IEC 2017 Bibliography 57 Figure 1 Possible elements of PV systems . 7 Figure 2 Sampling, recording, and reporting. 15 Figure B.1 Sensor attachment, permanent . 46 Figure B.2 Sensor attachment, te

41、mporary 46 Figure B.3 Sensor element wire strain relief . 46 Figure D.1 Energy flow between possible elements of different PV system types . 49 Table 1 Monitoring system classifications and suggested applications . 13 Table 2 Sampling and recording interval requirements . 16 Table 3 Measured paramet

42、ers and requirements for each monitoring system class 18 Table 4 Relation between system size (AC) and number of sensors for specific sensors referenced in Table 3 . 20 Table 5 Sensor choices and requirements for in-plane and global irradiance . 21 Table 6 Irradiance sensor alignment accuracy . 22 T

43、able 7 Irradiance sensor maintenance requirements 23 Table 8 PV module temperature sensor maintenance requirements . 26 Table 9 Ambient air temperature sensor maintenance requirements 27 Table 10 Wind sensor maintenance requirements 28 Table 11 Inverter-level electrical measurement requirements . 32

44、 Table 12 Plant-level AC electrical output measurement requirements 32 Table 13 Calculated parameters 34 Table 14 Performance metrics . 38 Table D.1 Elements of different PV system types . 50 Table D.2 Parameters and equations for different system types . 51 BS EN 61724-1:2017IEC 61724-1:2017 IEC 20

45、17 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PHOTOVOLTAIC SYSTEM PERFORMANCE Part 1: Monitoring FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The objec

46、t 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 International Standards, Technical Specifications, Technical Reports, Publicly Available Specification

47、s (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 this preparatory work. International, governmental and non-governmental organizations liaisin

48、g 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 two organizations. 2) The formal decisions or agreements of IEC on technical matters express,

49、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 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