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GB/T 46246-2025: Wind energy generation systems - Wind measurement for applicationof meteorological mast, nacelle and spinner mounted instruments
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| GB/T 46246-2025 | English | 1234 |
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Wind energy generation systems - Wind measurement for applicationof meteorological mast, nacelle and spinner mounted instruments
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GB/T 46246-2025
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Basic data
| Standard ID | GB/T 46246-2025 (GB/T46246-2025) |
| Description (Translated English) | Wind energy generation systems - Wind measurement for applicationof meteorological mast, nacelle and spinner mounted instruments |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | F11 |
| Classification of International Standard | 27.180 |
| Word Count Estimation | 62,684 |
| Date of Issue | 2025-10-05 |
| Date of Implementation | 2025-10-05 |
| Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China |
GB/T 46246-2025: Wind energy generation systems - Wind measurement for applicationof meteorological mast, nacelle and spinner mounted instruments
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT46246-2025
ICS 27.180
CCSF11
National Standards of the People's Republic of China
Wind power generation systems are based on systems installed on wind measurement towers, nacelles, and...
Wind energy resource measurement by the wind measuring equipment on the fairing
Published on 2025-10-05
Implemented on October 5, 2025
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of Contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms and Definitions 2
4.Symbols and Abbreviations 3
5 General Principles 8
6.Classification of cup anemometers and ultrasonic anemometers 8.
7.Evaluation of cup anemometers and ultrasonic anemometers 10
8.Anemometer Wind Tunnel Calibration Procedure 21
9.Anemometer on-site comparison 28
10.Installation of wind measurement tower equipment 31
11.Uncertainty in wind speed measurement 39
12 Test Report 42
Appendix A (Informative) Wind Tunnel Calibration Procedure for Wind Direction Sensors 44
Appendix B (Informative) Airflow Distortion Correction for Truss-Type Anemometer Towers 52
Appendix C (Informative) Cabin Equipment Installation 54
Appendix D (Informative) Fairing Anemometer 56
Reference 57
Figure 1.Comparison of the tilt angle response (Vα/Vα=0) of a cup anemometer as a function of the inflow angle (α) with the cosine response.
Figure 2.Wind tunnel measurement of the torque of a cup anemometer at a wind speed of 8 m/s [torque QA-QF is a function of the rotor's angular velocity (ω)] 13
Figure 3.Example 14 of the functional relationship between bearing friction torque (QF) and temperature within the range of angular velocity (ω).
Figure 4 Example - Speed ratio (λ) as a function of rotor torque coefficient (CQA), from Klow equal to -5.5 and Khigh equal to
-6.5 step response 16
Figure 5.Examples of graded deviations for cup anemometers, where 1.69A (top) and 6.65B (bottom) are listed.
Figure 6.Examples of graded deviations for cup anemometers, where 8.01C (top) and 9.94D (bottom) are represented.
Figure 7.Definition of volume used for airflow uniformity testing.22
Figure 8.Effective direction sector of a reference anemometer on a triangular truss-type wind tower for independent top mounting of anemometers.
Example 30
Figure 9.Example 31 of the effective directional sector of a reference anemometer on a tubular wind tower with a top-mounted anemometer.
Figure 10 Top-mounted anemometer and installation requirements example 32
Figure 11 Scheme 33.Main anemometer, control anemometer, wind vane, and other equipment are installed side-by-side on a horizontal bar at the top.
Figure 12.Isotropic wind speed points around the tubular anemometer tower.
Figure 13.Relative wind speed as a function of the ratio of distance from the tubular meteorological tower (Rd) to the tower diameter (d) 35
Figure 14 Triangular truss wind measurement tower 35
Figure 15.Local isotropic wind speeds around a triangular truss anemometer tower with a thrust coefficient (CT) of 0.5.
Figure 16.For different thrust coefficients (CT), the ratio of the center relative wind speed to the distance (Rd) from the meteorological tower to the distance to the side width Lm.
Relationship 36
Figure 17.3DCFD simulation of airflow distortion around the triangular truss anemometer tower (CT=0.27) under two different wind conditions.
Figure A.1 Example of calibration equipment for a wind direction sensor (wind vane) in a wind tunnel 45
Figure B.1 Example of airflow distortion at a wind measurement tower 52
Figure B.2 Relationship between airflow distortion residuals and wind direction 53
Figure C.1 Anemometer installation on the top of the nacelle 55
Table 1.Influence parameter ranges for grades A, B, C, D, and S (10-minute average) 9
Table 2.Example 17 of the tilt angle response of a cup anemometer.
Table 3.Example 18.Friction coefficient of a cup anemometer
Table 4.Other data related to the classification of the example cup anemometer.18
Table 5 Example 26 of anemometer calibration uncertainty assessment
Table 6.Evaluation methods for thrust coefficient (CT) of various truss-type wind measurement towers 37
Table A.1 Uncertainty Contribution Due to Wind Direction Sensor Calibration (50%)
Table A.2 Uncertainty Contribution and Overall Standard Uncertainty 50 in Wind Direction Sensor Calibration
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document is equivalent to IEC 61400-50-1.202 "Wind power generation systems - Part 50-1.Wind measurement based on wind measurement towers,
Application of devices on the nacelle and fairing.
The following minimal editorial changes have been made to this document.
---To harmonize with existing standards, the standard title has been changed to "Wind Power Generation Systems Based on Wind Measurement Towers, Nacelles and Fairings".
Wind energy resource measurement using wind measurement equipment.
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Machinery Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Standardization of Wind Power (SAC/TC50).
This document was drafted by. China Quality Certification Center Co., Ltd., Shanghai Zhongren Shangke New Energy Technology Co., Ltd., and Mingyang Smart Energy.
Group Corporation, Shanghai Electrical Apparatus Research Institute (Group) Co., Ltd., Goldwind Science & Technology Co., Ltd., China Electric Power Research Institute
Limited Liability Company, Shanghai Electric Wind Power Group Co., Ltd., Beijing Certification & Inspection Group Co., Ltd., Shanghai Electric Power Industry Co., Ltd., China Agricultural...
Industrial Mechanization Science Research Institute Hohhot Branch Co., Ltd., Envision Energy Co., Ltd., Fudan University, Nanjing Muli Laser Technology Co., Ltd.
Limited Company, Yunda Energy Technology Group Co., Ltd., Wind Power Division of CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd., CRRC Shandong Wind Power
Power generation company, Hunan Xinglan Wind Power Co., Ltd., CSSC Offshore & Marine Engineering Wind Power Co., Ltd., Guohua Energy Investment Co., Ltd., and Sinovel Wind Power Technology Co., Ltd.
(Group) Co., Ltd., Jiangsu Goldwind Technology Co., Ltd., Beijing Ruike Tongchuang Technology Co., Ltd., Chongqing University, Hunan University.
The main drafters of this document are. Kang Wei, Yuan Ying, He Zhongyi, Shi Yufeng, Zheng Haifeng, Nie Feng, Fu Deyi, Zhang Liming, Pang Mengzhi, and Zhang Zhiwei.
Wu Yungao, Zhang Zhaozhi, Zhu Zhiquan, Liu Zhixin, Yu Qingqing, Yang Liu, Guo Zitao, Xiao Fuhua, Wang Can, Yan Weiming, He Rongguang, Li Cuiping, Song Jun
Li Peng, Zhang Bingqian, Liu Niu, Huang Sheng, Wei Juan.
Wind power generation systems are based on systems installed on wind measurement towers, nacelles, and...
Wind energy resource measurement by the wind measuring equipment on the fairing
1.Scope
IEC 61400-50 describes the methods and requirements for measuring wind speed (and related parameters such as wind direction and turbulence intensity) using equipment.
These measurements are used in conjunction with wind energy and wind turbine technologies described in other documents (such as resource assessment and wind turbine characteristic testing).
As input for some evaluation and testing procedures.
This document applies to wind measurement equipment installed on wind measurement towers, wind turbine nacelles, or wind turbine fairings.
Wind measurement at the location.
This document does not include wind measurement remote sensing equipment in locations far from where the equipment is installed (such as vertical profilers or forward-facing lidar).
Note. This document describes in detail.
a) Classification parameters for cup anemometers and ultrasonic anemometers to evaluate the performance of specific types and models of anemometers under specific environmental conditions.
Uncertainty in wind speed measurement;
b) The procedures and requirements for classifying cup anemometers and ultrasonic anemometers, for example, classifying a specific model and type of wind speed.
Part of the type test;
c) Procedures and requirements for wind tunnel calibration of anemometers;
d) Check the consistency of the calibration of one anemometer in the field, and an additional, optional method, namely by comparing it with another wind speed meter.
On-site comparison will be conducted.
e) Requirements for installing anemometers and other instruments on the wind measurement tower;
f) Evaluation of the uncertainty in wind speed measurement;
g) Reporting requirements.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
ISO 2533.1975 Standard atmosphere
ISO /IEC Guide 98-3.2008 Uncertainty in Measurement - Part 3.Guidelines for the Expression of Uncertainty in Measurement
1995)
Note. GB/T 27418-2017 Evaluation and expression of measurement uncertainty (ISO /IEC Guide 98-3.2008, MOD)
IEC 61400-12-3.2022 Wind power generation systems – Part 12-3.Site calibration for power characteristic testing (Windenergygen-
Note. GB/T 46245-2025 Field calibration of power characteristic test for wind power generation systems (IEC 61400-12-3.2022, IDT)
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