EN 62670-2-2015 en Photovoltaic concentrators (CPV) - Performance testing - Part 2 Energy measurement.pdf

1、BSI Standards PublicationPhotovoltaic concentrators (CPV) Performance testingPart 2: Energy measurementBS EN 62670-2:2015National forewordThis British Standard is the UK implementation of EN 62670-2:2015. It isidentical to IEC 62670-2:2015.The UK participation in its preparation was entrusted to Tec

2、hnicalCommittee 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 responsible for its correct application. The British

3、Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 77377 8ICS 27.160Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2015.Amen

4、dments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 62670-2:2015EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 62670-2 June 2015 ICS 27.160 English Version Photovoltaic concentrators (CPV) - Performance testing - Part 2: Energy measurement (IEC 62670-2:2015) Conce

5、ntrateurs photovoltaques (CPV) - Essai de performances - Partie 2: Mesure de lnergie (IEC 62670-2:2015) Konzentrator-Photovoltaik (CPV) Leistungsmessung - Teil 2: Energiemessung (IEC 62670-2:2015) This European Standard was approved by CENELEC on 2015-06-11. CENELEC members are bound to comply with

6、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 such national standards may be obtained on application to the CEN-CENELEC Managem

7、ent 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 Management Centre has the sa

8、me 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, Ireland, Italy, Latvia, Li

9、thuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnis

10、che Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 62670-2:2015 E BS EN 62670-2:2015EN 62670-2:2015 2 Foreword The text of document 82/940/FDIS, future e

11、dition 1 of IEC 62670-2, prepared by IEC/TC 82 “Solar photovoltaic energy systems“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 62670-2:2015 The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an i

12、dentical national standard or by endorsement (dop) 2016-03-11 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-06-11 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC

13、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 62670-2:2015 was approved by CENELEC as a European Standard without any modification. BS EN 62670-2:2015EN 62670-2:2015 3 Annex ZA (normative) Normati

14、ve 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 application. For dated references, only the edition cited applies. For undated references

15、, 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. NOTE 2 Up-to-date information on the latest versions of the European Standards liste

16、d in this annex is available here: www.cenelec.eu Publication Year Title EN/HD Year IEC 62670-1 - Photovoltaic concentrators (CPV) - Performance testing - Part 1: Standard conditions EN 62670-1 - ISO/IEC 17025 - General requirements for the competence of testing and calibration laboratories - - ISO

17、8601 2004 Data elements and interchange formats - Information interchange - Representation of dates and times - - ISO 9060 - Solar energy; specification and classification of instruments for measuring hemispherical solar and direct solar radiation - - ISO 9847 - Solar energy - Calibration of field p

18、yranometers by comparison to a reference pyranometer - - JCGM 100 2008 Evaluation of measurement data - Guide to the expression of uncertainty in measurement - - BS EN 62670-2:2015 2 IEC 62670-2:2015 IEC 2015 CONTENTS FOREWORD . 4 INTRODUCTION . 6 1 Scope 7 2 Normative references 7 3 Terms and defin

19、itions 7 4 Description of the method 9 5 Selection of subset under test . 10 6 Operation, maintenance and cleaning 10 7 Downtimes and unavailability . 11 8 Parasitic energy. 11 9 Data acquisition . 11 9.1 General requirements . 11 9.1.1 Data acquisition system (DAS) 11 9.1.2 Sampling interval . 12 9

20、.2 Mandatory measurements . 13 9.2.1 General . 13 9.2.2 Direct normal irradiance. 13 9.2.3 Global plane of array irradiance . 13 9.2.4 Ambient air temperature 14 9.2.5 Wind speed . 14 9.2.6 Electrical power or energy . 14 9.2.7 Cold source temperature (actively cooled systems only) 14 10 Data post-p

21、rocessing . 14 10.1 Calculation of energy from integrated power values 14 10.2 Calculation of energy from discrete power values . 15 10.3 Calculation of the DNI time series . 15 10.4 Calculation of the active AC or DC energy 17 11 Calculation of the performance ratio 18 11.1 General . 18 11.2 AC per

22、formance ratio 18 11.3 DC performance ratio 19 12 Derived parameters . 20 13 Report . 20 Annex A (informative) Some suggested ways to filter data in order to identify incorrect data 22 Annex B (informative) Best practices for power plant energy measurement 23 Annex C (normative) Optionally derived p

23、arameters. 24 C.1 General . 24 C.2 Energy Production Rate (EPR) 24 C.3 Capacity Factor (CF) . 24 Figure 1 Nomenclature of angles used in Formula (2) 17 BS EN 62670-2:2015IEC 62670-2:2015 IEC 2015 3 Table 1 Steps of the energy measurement procedure 10 Table 2 Mandatory measurements. 13 BS EN 62670-2:

24、2015 4 IEC 62670-2:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ PHOTOVOLTAIC CONCENTRATORS (CPV) PERFORMANCE TESTING Part 2: Energy measurement FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electro

25、technical 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 International Standards, Technical Specificat

26、ions, 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 this preparatory work. International

27、, 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 two organizations. 2) The formal deci

28、sions 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 the form of recommendations for inter

29、national 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 misinterpretation by any end user. 4) In or

30、der 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 national or regional publication shall be cl

31、early 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 carried out by independent certification

32、 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 Committees for any personal injury, pro

33、perty 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 to the Normative references cited in

34、 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 be held responsible for identifying an

35、y or all such patent rights. International Standard IEC 62670-2 has been prepared by IEC technical committee 82: Solar photovoltaic energy systems. The text of this standard is based on the following documents: FDIS Report on voting 82/940/FDIS 82/969/RVD Full information on the voting for the appro

36、val 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. BS EN 62670-2:2015IEC 62670-2:2015 IEC 2015 5 A list of all parts in the IEC 62670 series, published under the general title Ph

37、otovoltaic Concentrators (CPV) Performance testing, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publicat

38、ion. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. IMPORTANT The colour inside logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Use

39、rs should therefore print this document using a colour printer. BS EN 62670-2:2015 6 IEC 62670-2:2015 IEC 2015 INTRODUCTION IEC 62670 series establishes requirements for evaluating concentrator PV performance. It is written to be applicable to all concentrator PV technologies that have a geometric c

40、oncentration ratio greater than 3 and require tracking. Included in the IEC 62670 series of standards are definitions of the standard conditions and methods to be used for assessing CPV performance. IEC 62670-1 defines a standard set of conditions so that power ratings noted on data sheets and namep

41、lates have a standard basis. IEC 62670-2 describes an on-sun, measurement based method for determining the energy output and performance ratio for CPV arrays, assemblies and power plants. IEC 62670-3 (under consideration) describes methods for providing a CPV power assessment under a set of standard

42、 conditions, enabling assessments both indoors and outdoors. IEC 62670-4 (under consideration) describes methods for calculating the prospective electrical energy output of CPV modules, arrays, assemblies and power plants based on the measurements carried out in IEC 62670-2. BS EN 62670-2:2015IEC 62

43、670-2:2015 IEC 2015 7 PHOTOVOLTAIC CONCENTRATORS (CPV) PERFORMANCE TESTING Part 2: Energy measurement 1 Scope This part of IEC 62670 specifies the minimum requirements for determining the energy output and performance ratio for CPV modules, arrays, assemblies and power plants using an on-sun, measur

44、ement based method. The purpose of this International Standard is to define testing methods, to establish a standard energy measurement for CPV modules, arrays, assemblies and power plants, and to specify the minimum reporting information. 2 Normative references The following documents, in whole or

45、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 referenced document (including any amendments) applies. IEC 62670-1, Photovoltaic concentrators (CPV

46、) Performance testing Part 1: Standard conditions ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories ISO 8601:2004, Data elements and interchange formats Information interchange Representation of dates and times ISO 9060, Solar energy Specification and cla

47、ssification of instruments for measuring hemispherical solar and direct solar radiation ISO 9847, Solar energy Calibration of field pyranometers by comparison to a reference pyranometer JCGM 100:2008, Evaluation of measurement data Guide to the expression of uncertainty in measurement 3 Terms and de

48、finitions For the purposes of this document, the following terms and definitions apply: 3.1 active AC energy real AC energy (excluding reactive energy) BS EN 62670-2:2015 8 IEC 62670-2:2015 IEC 2015 3.2 actively cooled CPV system that requires some type of media (fluid, gas, etc.) to facilitate the

49、transfer of thermal energy from one body to another. This could be by means of force air, pumps, thermo-electric cooler, gas transfer or any other means not covered by passive cooling. 3.3 concentrator qualifies photovoltaic devices or systems that use concentrated sunlight Note 1 to entry: Concentrator photovoltaic technology is usually designated as CPV. 3.4 concentrator optics optical component that performs one or more of the following functions from its input t