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BS EN IEC 61400-50-2:2022

BS EN IEC 61400-50-2:2022

$189.07

Wind energy generation systems – Wind measurement. Application of ground-mounted remote sensing technology

Published By Publication Date Number of Pages
BSI 2022 48
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Part 50 of IEC 61400 specifies methods and requirements for the application of instruments to measure wind speed (and related parameters, e.g. wind direction and turbulence intensity). Such measurements are required as an input to some of the evaluation and testing procedures for wind energy and wind turbine technology (e.g. resource evaluation and turbine testing) described by other standards in the IEC 61400 series. Part 50-2 is applicable specifically to the use of ground mounted remote sensing wind measurement instruments, i.e devices which measure the wind at some location generally above and distant from the location at which the instrument is mounted (e.g. sodars, vertical profiling lidars). This document specifically excludes other types of RSD such as forward facing or scanning lidars.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
8 English
CONTENTS
10 FOREWORD
12 INTRODUCTION
13 1 Scope
2 Normative references
3 Terms and definitions
16 4 Symbols, units and abbreviated terms
17 5 General
18 Tables
Table 1 ā€“ Interfaces from other standards to IEC 61400-50-2
Table 2 ā€“ Interfaces from IEC 61400-50-2 to other standards
19 6 Classification of RSDs
6.1 General
20 6.2 Data acquisition
21 6.3 Data preparation
6.4 Principle and requirements of a sensitivity test
23 Figures
Figure 1 ā€“ Tilt angular response VĪ±ā€Šāˆ•VĪ±=0 of a cup anemometer as a function of flow angle Ī± compared to cosine response (IEC 61400-50-1)
Figure 2 ā€“ Deviation versus upflow angle determined for an RSD with respect to the cup anemometer in Figure 1
24 Table 3 ā€“ Bin width example for a list of environmental variables
25 Figure 3 ā€“ Example of sensitivity analysis against wind shear
26 Table 4 ā€“ Parameters derived from a sensitivity analysis of an RSD
27 6.5 Assessment of environmental variable significance
Table 5 ā€“ Ranges of environmental parameters for sensitivity analysis
28 6.6 Assessment of interdependency between environmental variables
Table 6 ā€“ Example selection of environmental variables found to have a significant influence
29 Figure 4 ā€“ Example of wind shear versus turbulence intensity
Figure 5 ā€“ Example of percentage deviation of RSD and reference sensor measurements versus turbulence intensity
30 6.7 Calculation of accuracy class
Table 7 ā€“ Sensitivity analysis parameters remaining after analysis of interdependency of variables
31 Table 8 ā€“ Example scheme for calculating maximum influence of environmental variables
32 6.8 Acceptance criteria
Table 9 ā€“ Preliminary accuracy classes of an RSD considering both all and only the most significant influential variables
Table 10 ā€“ Example final accuracy classes of an RSD
33 6.9 Classification of RSD
7 Verification of the performance of RSDs
35 Figure 6 ā€“ Comparison of 10 min averages of the horizontal wind speed component as measured by an RSD and a cup anemometer
Figure 7 ā€“ Bin-wise comparison of measurement of the horizontal wind speed component of an RSD and a cup anemometer
36 8 Evaluation of uncertainty of measurements by RSDs
8.1 General
8.2 Reference uncertainty
8.3 Uncertainty resulting from the RSD calibration test
37 Table 11 ā€“ Example of uncertainty calculations arising from calibration of an RSD in terms of systematic uncertainties
38 8.4 Uncertainty due to RSD classification
39 8.5 Uncertainty due to non-homogenous flow within the measurement volume
40 8.6 Uncertainty due to mounting effects
8.7 Combining uncertainties in the wind speed measurement from RSD (uVR,i)
9 Additional checks
9.1 Monitoring the performance of the RSD at the application site
9.2 Identification of malfunctioning of the RSD
9.3 Consistency check of the assessment of the RSD systematic uncertainties
41 9.4 In-situ test of the RSD
42 10 Application to SMC
11 Reporting
11.1 Common reporting on classification test, calibration test, and monitoring of the RSD during SMC
43 11.2 Additional reporting on classification test
11.3 Additional reporting on calibration test
44 11.4 Additional reporting on SMC
45 Annex A (informative)Uncertainty due to non-homogenous flow within the measurement volume
46 Bibliography

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BS EN IEC 61400-50-2:2022
$189.07