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GBZ44047-2024: Floating offshore wind turbines - Design requirements
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| GB/Z 44047-2024 | English | 914 |
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Floating offshore wind turbines - Design requirements
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Basic data
| Standard ID | GB/Z 44047-2024 (GB/Z44047-2024) |
| Description (Translated English) | Floating offshore wind turbines - Design requirements |
| Sector / Industry | National Standard |
| Classification of Chinese Standard | F11 |
| Word Count Estimation | 45,498 |
| Date of Issue | 2024-05-28 |
| Date of Implementation | 2024-12-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GBZ44047-2024: Floating offshore wind turbines - Design requirements
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
GB /Z 44047-2024.Design requirements for floating offshore wind turbines
ICS 27.180
CCSF11
Guiding technical documents of the People's Republic of China on national standardization
Design requirements for floating offshore wind turbines
Released on 2024-05-28
2024-12-01 implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of Contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 2
4 Symbols and abbreviations 4
4.1 Symbols and units 4
4.2 Abbreviations 4
5 General requirements 5
5.2 Design Method 5
5.6 Support structure identification 6
6 External conditions - definition and assessment 6
6.1 General 6
7 Structural design 7
7.1 General 7
7.3 Load 7
7.4 Design conditions and load cases 8
7.5 Calculation of loads and load effects 9
7.6 Limit state analysis 12
8 Control and protection systems 13
9 Mechanical System 14
10 Electrical system 14
11 Design of pile foundation and its auxiliary structures14
12 Assembly, installation and hoisting 14
12.1 Overview 14
12.2 General 14
12.3 Plan 15
12.13 Floating specific projects 15
13 Debugging, operation and maintenance 15
13.1 Overview 15
13.3 Debugging Instructions 15
13.4 Operator's Manual 15
13.5 Maintenance Manual 15
14 Anchoring system15
15 Floating stability 16
15.1 General 16
15.2 Complete static stability criteria 16
15.3 Alternative criteria for intact stability based on dynamic response 16
15.4 Damage stability criteria 16
16 Materials 16
17 Offshore support systems17
17.1 General 17
17.2 Bilge Water Treatment System 17
17.3 Ballast system 17
Appendix A (Informative) Key Design Parameters of Floating Offshore Wind Turbines 18
A.1 Floating offshore wind turbine identifier 18
A.2 Other environmental conditions 20
A.3 Restrictions on transportation, installation and maintenance 20
Appendix B (informative) Shallow water hydrodynamics and breaking waves 21
Appendix C (Informative) Guidelines for Calculation of Hydrodynamic Loads 22
Appendix D (Informative) Recommendations for the design of supporting structures for floating offshore wind turbines considering ice loads 23
Appendix E (Informative) Design of anchorage and auxiliary structures of floating offshore wind turbines 24
Appendix F (Informative) Statistical Extrapolation Method of Marine Meteorological Parameters for Ultimate Strength Analysis 25
Appendix G (informative) Corrosion protection 26
Appendix H (Informative) Prediction of Extreme Wave Height During Tropical Cyclones27
Appendix I (Informative) Recommendations for Calibration of Safety Levels in Tropical Cyclone Regions 28
Appendix J (Informative) Earthquake 29
Appendix K (Informative) Model Test 30
Appendix L (Informative) Tsunami 32
L.1 Overview 32
L.2 Numerical model of tsunami 32
L.3 Assessment of water level and flow velocity changes 34
L.4 References 35
Appendix M (Informative) Non-redundant anchoring systems 36
Appendix N (Informative) Differences between limit state methods in wind power and marine standards 37
Appendix O (Informative) Application of non-standard sustained extreme operating gusts 38
References 39
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document is equivalent to IEC TS61400-3-2.2019 "Wind energy generation systems Part 3-2.Floating offshore wind turbines
Design Requirements", the document type was adjusted from ISO technical specifications to my country's guiding technical documents.
The following minimal editorial changes were made to this document.
--- To coordinate with the existing standards, the name of the standard is changed to "Design Requirements for Floating Offshore Wind Turbines".
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the 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 for Standardization of Wind Power Generation (SAC/TC50).
This document was drafted by. Shanghai Electric Wind Power Group Co., Ltd., China Shipbuilding Industry Corporation Haizhuang Wind Power Co., Ltd., Jin
Wind Science & Technology Co., Ltd., Guodian United Power Technology Co., Ltd., China Power Construction Group Northwest Survey and Design Institute Co., Ltd., China
PowerChina Central South Survey and Design Institute Co., Ltd., PowerChina East China Survey and Design Institute Co., Ltd., Shanghai Survey and Design Institute Co., Ltd.
China Electric Power Research Institute Co., Ltd., China Quality Certification Center, China Electric Power Research Institute Co., Ltd., Shanghai Electric Power Industry Co., Ltd., CRRC Zhuzhou Electric
Wind Power Division of China Shipbuilding Industry Corporation, China Shipbuilding Wind Power Engineering Technology (Tianjin) Co., Ltd., China Huaneng Group Clean Energy Technology Research Institute
Institute Co., Ltd., Beijing Jianheng Certification Center Co., Ltd., Mingyang Smart Energy Group Co., Ltd., Harbin Electric Wind Energy Co., Ltd., Chongqing Da
Dongfang Electric Wind Power Co., Ltd., Longyuan Power Group Co., Ltd., China Energy Engineering Group Guangdong Electric Power Design Research
Institute Co., Ltd., Poly Changda Engineering Co., Ltd., China Classification Society Quality Certification Co., Ltd., Shanxi Tianbao Group Co., Ltd., CCCC Third
Navigation Engineering Bureau Co., Ltd., Jiangsu Yaxing Anchor Chain Co., Ltd., Tianshun Wind Energy (Suzhou) Co., Ltd., Xiamen Shuangrui Wind Power Technology
Co., Ltd., Qingdao Shuangrui Marine Environmental Engineering Co., Ltd., Shandong Electric Power Engineering Consulting Institute Co., Ltd., Nantong Huisheng Wind Power Technology Co., Ltd.
Co., Ltd., China Power Engineering Group Fujian Electric Power Survey and Design Institute Co., Ltd., and China Power Engineering Offshore Wind Power Engineering Co., Ltd.
The main drafters of this document are. Xu Yiqing, Zhao Dawen, Wang Ye, Dong Yehong, Wang Lijuan, Li Hongmei, Zhai Endi, Li Xuelin, Tian Weihui, Huang Chunfang,
Shen Kanmin, Fan Ke, Yuan Ying, Zhao Na, Sun Lei, Li Xiuzhen, Li Yajie, Guo Chen, Cai Zhisong, Liu Fanying, Zeng Xingguo, Liu Zhanfang, Zhang Hao, Wang Qijun,
Cao Shugang, Yang Mindong, Zhang Xianxiong, Fu Cheng, Hu Dawei, Wang Liliang, Zhang Yanling, Du Yu, Zhang Weixin, Wang Zhijian, Xiong Gang, Zhao Yongtao, Xu Junxiang,
Pan Xujie, Wang Zijun, Yan Jianguo, and Yang Xueliang.
Design requirements for floating offshore wind turbines
1 Scope
This document specifies additional requirements for the assessment of external conditions at floating offshore wind turbine (FOWT) sites and for ensuring
The basic design requirements for the engineering integrity of FOWTs are to provide an appropriate level of protection during the expected life cycle of the unit against
Prevent various risks from causing damage to the unit.
This document focuses on the engineering integrity of the FOWT structural components, but also addresses the mechanical devices of the control and protection systems, the internal electrical systems, and the
subsystems such as system and mechanical system.
If the floating foundation of a wind turbine is subjected to hydrodynamic loads and supported by buoyancy and an anchoring system, the wind
The generator set is considered as FOWT. FOWT consists of five main subsystems. wind turbine nacelle assembly (RNA), tower, floating foundation, anchor
Systems and supporting machinery, equipment and systems that do not belong to RNA.
The following types of floating foundation structures are explicitly considered in this document.
a) Ship and barge structures;
b) Semi-submersible;
c) Single column type (Spar);
d) Tension Leg Platform/Buoy (TLP/T LB).
In addition to the types of structures listed above, this document also generally includes other floating platforms used to support wind turbines.
These platform structures may vary greatly in geometry and construction type and therefore may only partially meet the requirements of this document.
In all such cases, the specific requirements set forth in this document may not apply to the design of all or part of such structures.
The conformity of the components requires that the basic principles followed in the design meet or exceed the safety level required by this document.
This document applies to unmanned floating structures with a single horizontal axis wind turbine.
Axis wind turbines or combined wind/wave energy systems may require additional design considerations.
This document is used in conjunction with the corresponding IEC and ISO standards referenced in Chapter 2.This document fully complies with IEC 61400-1 and
The safety level of FOWT designed according to this document meets or exceeds the requirements of IEC 61400-1 and IEC 61400-
The level specified in 3-1.
2 Normative references
The contents of the following documents constitute the essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
1.Design requirements)
Note. GB/T 18451.1-2022 Design requirements for wind turbines (IEC 61400-1.2019, IDT)
IEC 61400-3-1.2019 Wind energy generation systems Part 3-1.Design requirements for fixed offshore wind turbines
Note. GB/T 31517.1-2022 Design requirements for fixed offshore wind turbines (IEC 61400-3-1.2019, IDT)
ISO.19901-1.2015 Particular requirements for offshore structures for the petroleum and natural gas industries Part 1.Marine meteorological design and operation
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