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GB/T 46245-2025: Wind energy generation systems - Power performance measurement based site calibration
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 46245-2025 | English | 754 |
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Wind energy generation systems - Power performance measurement based site calibration
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GB/T 46245-2025
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Basic data
| Standard ID | GB/T 46245-2025 (GB/T46245-2025) |
| Description (Translated English) | Wind energy generation systems - Power performance measurement based site calibration |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | F11 |
| Classification of International Standard | 27.180 |
| Word Count Estimation | 38,359 |
| 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 46245-2025: Wind energy generation systems - Power performance measurement based site calibration
---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/GBT46245-2025
ICS 27.180
CCSF11
National Standards of the People's Republic of China
Wind power generation system power characteristic test site calibration
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 1
4.Symbols, Units, and Abbreviations 3
5 General Rules 4
6.Site location designation procedures 5
7 Test Preparation 7
7.1 Selecting the location of the wind turbine generator and the meteorological tower under test.
7.2 Test Equipment 8
8.Data Collection and Screening Criteria 9.
9.Analysis 9
9.1 General Rules 9
9.2 Site Wind Shear Assessment
9.3 Method 1.Wind direction and wind shear range 10
9.4 Method 2.Linear Regression Method for Insignificant Wind Shear 11
9.5 Other Calculations 12
10 locations have a fixed uncertainty of 12.
10.1 Site-specific Type A uncertainty 12
10.2 Site-specific Type B uncertainty 13
10.3 Uncertainty in wind speed measurement considering airflow distortion caused by site location (uVT,i) 15
10.4 Combined uncertainty 15
11 Quality checks and additional uncertainties 16
11.1 Convergence Check 16
11.2 Linear Regression Correlation Check (see 9.4) 16
11.3 Changes in the correlation between adjacent wind direction intervals 16
11.4 Site calibration and power characteristic testing in different seasons 17
Appendix A (Informative) Result Validation 18
Appendix B (Informative) Site Marking Example 19
References 32
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 61400-12-3.2022 "Wind power generation systems - Part 12-3.Power characteristics based on site specifications".
test".
The following minimal editorial changes have been made to this document.
---To align with existing standards, the standard name has been changed to "Field Standardization of Power Characteristic Testing for Wind Power Generation Systems";
---Incorporating the errata from IEC 61400-12-3.2022/CORR1draft.2023, change SVT in formula (8) to
Ssc,u2VT,coc,i,j is changed to u2VT,coc,i,j*V2i, and a comment is added (see 10.3).
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 Electric Power Research Institute Co., Ltd., and the Wind Power Division of CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd.
Goldwind Science & Technology Co., Ltd., CSSC Offshore & Marine Engineering Co., Ltd., Shanghai Electric Wind Power Group Co., Ltd., and Windey Energy Technology Group
Joint-stock company, Mingyang Smart Energy Group Co., Ltd., Envision Energy Co., Ltd., Hunan Xinglan Wind Power Co., Ltd., CRRC Shandong Wind Power
Limited Liability Company, Beijing Jianheng Certification Center Co., Ltd., China Quality Certification Center Co., Ltd., Chongqing Qianjiang District Three Gorges New Energy Power Generation Co., Ltd.
Limited Liability Company, Zhejiang Chint New Energy Development Co., Ltd., and Sinovel Wind Power Technology (Group) Co., Ltd.
The main drafters of this document are. Fu Deyi, Wan Yubin, Wang Ruiming, Nie Feng, Fu Xinhong, Gong Lice, Zhang Liming, Jin Huabin, Ye Juan, and Wei Yufeng.
Zhang Zhaozhi, Xu Ke, Xu Hao, Pang Mengzhi, Li Peng, Bai Han, Jin Jianbo, Li Chaofeng, Zhu Rongyao.
Wind power generation system power characteristic test site calibration
1.Scope
This document specifies the measurement and analysis procedures for wind speed corrections derived from topographic effects.
This document applies to the performance testing of all types and sizes of grid-connected wind turbines described in IEC 61400-12-1.This procedure...
Performance evaluation of specific wind turbine units applicable to specific locations.
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.
IEC 61400-12-1 Wind power generation systems – Part 12-1.Test of power characteristics of wind turbine generators (Windenergygenera-
Note. GB/T 18451.2-2025 Power characteristic test of wind turbine generator sets for wind power generation systems (IEC 61400-12-1.2022, IDT)
IEC 61400-12-5 Wind power generation systems – Part 12-5.Power characteristics assessment of obstacles and terrain (Windenergy)
Note. GB/T 46242-2025 Power characteristic testing of wind power generation systems - Obstacle and terrain assessment (IEC 61400-12-5.2022, IDT)
IEC 61400-50-1 Wind power generation systems – Part 50-1.Wind measurement based on measurements mounted on anemometers, nacelles and fairings
Note. GB/T 46247-2025 Wind Energy Resource Measurement Based on Wind Measurement Equipment Installed on Wind Measurement Towers, Nacelles and Fairings for Wind Power Generation Systems
(IEC 61400-50-1.2022, IDT)
ISO /IEC GUIDE 98-3.2008 Uncertainty in measurement – Part 3.Guidelines for the expression of uncertainty in measurement (Uncertainty in measurement)
Note. GB/T 27418-2017 Evaluation and expression of measurement uncertainty (ISO /IEC Guide 98-3.2008, MOD)
3.Terms and Definitions
The following terms and definitions apply to this document.
3.1
accuracy
The degree to which the measured value of the measured object closely approximates the true value.
3.2
Atmospheric stability
A measure of whether wind promotes or inhibits vertical mixing trends.
Note. The characteristics of a stable atmosphere, compared to an unstable atmosphere, are a higher temperature gradient with altitude, higher wind shear, potential wind reversal, and lower turbulence intensity.
Temperature. Neutral and unstable atmospheres typically result in lower temperature gradients and wind shear.
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