1、 IEC 61400-12-2 Edition 1.0 2013-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Wind turbines Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry Eoliennes Partie 12-2: Performance de puissance des oliennes de production dlectricit base sur lanmomtrie de n
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16、tion 1.0 2013-03 INTERNATIONAL STANDARD NORME INTERNATIONALE Wind turbines Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry Eoliennes Partie 12-2: Performance de puissance des oliennes de production dlectricit base sur lanmomtrie de nacelle INTERNATIONA
17、L ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE XE ICS 27.180 PRICE CODE CODE PRIX ISBN 978-2-83220-658-4 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale Warning! Make sure that you obtained
18、this publication from an authorized distributor. Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agr. colourinside 2 61400-12-2 IEC:2013 CONTENTS FOREWORD . 5 INTRODUCTION . 7 1 Scope . 8 2 Normative references . 8 3 Terms and definitions . 9 4 Symbols and
19、 units 13 5 Overview of test method . 16 6 Preparation for performance test 19 6.1 General . 19 6.2 Wind turbine 19 6.3 Test site 19 6.3.1 Terrain classification 20 6.3.2 RIX indices 20 6.3.3 Average slope . 21 6.3.4 Determine terrain class 21 6.3.5 Ridge formations . 22 6.4 Nacelle wind speed trans
20、fer function . 23 6.5 Test plan . 23 7 Test equipment . 23 7.1 Electric power . 23 7.2 Wind speed . 24 7.3 Wind direction . 24 7.3.1 Nacelle yaw position sensor 24 7.3.2 Nacelle wind direction sensor 25 7.3.3 Wind direction . 25 7.4 Air density . 25 7.5 Rotor speed 26 7.6 Pitch angle 26 7.7 Wind tur
21、bine status . 26 7.8 Data acquisition. 26 8 Measurement procedure . 27 8.1 General . 27 8.2 Wind turbine operation 27 8.3 Data system(s) synchronisation . 27 8.4 Data collection 28 8.5 Data quality check . 28 8.6 Data rejection 29 8.7 Data correction 30 8.8 Database . 30 9 Derived results . 31 9.1 D
22、ata normalisation 31 9.1.1 Density correction 31 9.2 Determination of measured power curve 32 9.3 Annual energy production (AEP) 32 9.4 Power coefficient . 33 9.5 Uncertainty analysis 34 61400-12-2 IEC:2013 3 10 Reporting format . 34 Annex A (informative) Nacelle instrument mounting . 42 Annex B (no
23、rmative) Measurement sector procedure . 44 Annex C (normative) Nacelle wind speed transfer function validity procedure 49 Annex D (normative) Nacelle wind speed transfer function measurement procedure 51 Annex E (normative) Evaluation of uncertainty in measurement . 58 Annex F (normative) Theoretica
24、l basis for determining the uncertainty of measurement using the method of bins . 62 Annex G (normative) NTF/NPC uncertainty estimates and calculation 70 Annex H (normative) Allowable anemometry instrument types . 83 Annex I (informative) Results and uncertainty considerations . 85 Annex J (informat
25、ive) Example multi-turbine NTF/NPC uncertainty calculation . 90 Annex K (informative) Organisation of test, safety and communication . 98 Annex L (informative) NPC and NTF flowchart . 100 Figure 1 Procedural overview . 18 Figure 2 Presentation of example data: transfer function resulting from Annex
26、D . 37 Figure 3 Presentation of example data: nacelle power performance test scatter plots 38 Figure 4 Presentation of example data: binned power curve with uncertainty bands . 38 Figure 5 Presentation of example data: measured power curve and Cpcurve 39 Figure A.1 Mounting of anemometer on top of n
27、acelle 43 Figure B.1 Sectors to exclude due to wakes of neighbouring and operating wind turbines and significant obstacles . 46 Figure B.2 Example of the result of a sector self-consistency check . 48 Figure D.1 Nacelle transfer function for wind speed . 56 Figure J.1 Impact of multiple turbine test
28、ing on measurement uncertainty 97 Figure J.2 Impact of multiple turbine testing on sampling uncertainty . 97 Figure L.1 NPC flowchart . 100 Figure L.2 NTF flowchart 101 Table 1 Slope terrain classification 21 Table 2 RIX terrain classification 22 Table 3 Final terrain class 22 Table 4 Maximum ridge
29、step effects on terrain class 22 Table 5 Example of a measured power curve . 40 Table 6 Example of estimated annual energy production 41 Table B.1 Obstacle requirements: relevance of obstacles 45 Table D.1 Example of presentation of a measured power curve based on data from the meteorological mast,
30、for consistency check 57 Table E.1 Uncertainty components in nacelle transfer function evaluation 59 Table E.2 Uncertainty components in nacelle power curve evaluation 60 Table E.3 Uncertainty components in nacelle based absolute wind direction 61 Table F.1 Example cancellation sources 64 Table F.2
31、List of category A and B uncertainties for NTF . 64 4 61400-12-2 IEC:2013 Table F.3 List of category A and B uncertainties for NPC . 66 Table F.4 Expanded uncertainties 69 Table G.1 Estimates for uncertainty components from site calibration 70 Table G.2 Estimates for uncertainty components from NTF
32、measurement 72 Table G.3 Estimates for uncertainty components from NPC measurement . 74 Table G.4 Estimates for uV5,ifor NPC terrain class . 76 Table G.5 Estimates for uncertainty components for wind direction 77 Table G.6 Estimates for contribution factors for site calibration 78 Table G.7 Estimate
33、s for contribution factors for NTF 79 Table G.8 Estimates for contribution factors for NPC . 80 Table J.1 List of correlated uncertainty components . 91 Table J.2 Sample AEP and uncertainty data from 3 turbines 93 Table J.3 Component uncertainty contribution to AEP uncertainty on turbine 1 93 Table
34、J.4 Combination of uncertainty components across turbines. 95 61400-12-2 IEC:2013 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ WIND TURBINES Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry FOREWORD 1) The International Electrotechnical Commission (IEC
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45、he subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61400-12-2 has been prepared by IEC technical committee 88: Wind turbines. The text of this standard is based on the following documents: FDIS Report on voting 88/
46、442/FDIS 88/445/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. A list of all parts in the IEC 61400 series, published under th
47、e general title Wind turbines, can be found on the IEC website. 6 61400-12-2 IEC:2013 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 publica
48、tion. 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. Us
49、ers should therefore print this document using a colour printer. 61400-12-2 IEC:2013 7 INTRODUCTION The purpose of this part of IEC 61400-12 is to provide a uniform methodology of measurement, analysis, and reporting of power performance characteristics for individual electricity-producing wind turbines utilising nacelle-anemometry methods. This standard is
