IEC TS 61400-3-2:2019

Wind energy generation systems - Part 3-2: Design requirements for floating offshore wind turbines

IEC TS 61400-3-2:2019 specifies additional requirements for assessment of the external conditions at a floating offshore wind turbine (FOWT) site and specifies essential design requirements to ensure the engineering integrity of FOWTs. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime.
This document focuses on the engineering integrity of the structural components of a FOWT but is also concerned with subsystems such as control and protection mechanisms, internal electrical systems and mechanical systems.
A wind turbine is considered as a FOWT if the floating substructure is subject to hydrodynamic loading and supported by buoyancy and a station-keeping system. A FOWT encompasses five principal subsystems: the RNA, the tower, the floating substructure, the station-keeping system and the on-board machinery, equipment and systems that are not part of the RNA.
The following types of floating substructures are explicitly considered within the context of this document:
a) ship-shaped structures and barges,
b) semi-submersibles (Semi),
c) spar buoys (Spar),
d) tension-leg platforms/buoys (TLP / TLB).
In addition to the structural types listed above, this document generally covers other floating platforms intended to support wind turbines. These other structures can have a great range of variability in geometry and structural forms and, therefore, can be only partly covered by the requirements of this document. In other cases, specific requirements stated in this document can be found not to apply to all or part of a structure under design. In all the above cases, conformity with this document will require that the design is based upon its underpinning principles and achieves a level of safety equivalent, or superior, to the level implicit in it.
This document is applicable to unmanned floating structures with one single horizontal axis turbine. Additional considerations might be needed for multi-turbine units on a single floating substructure, vertical-axis wind turbines, or combined wind/wave energy systems.
This document is to be used together with the appropriate IEC and ISO standards mentioned in Clause 2. In particular, this document is intended to be fully consistent with the requirements of IEC 61400-1 and IEC 61400-3-1. The safety level of the FOWT designed according to this document is to be at or exceed the level inherent in IEC 61400‑1 and IEC 61400-3-1.

General Information

• Status: Published
• Publication Date: 04-Apr-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 27.180 - Wind turbine energy systems
• ICS: 31.240 - Mechanical structures for electronic equipment
• Technical Committee: TC 88 - Wind energy generation systems
• Drafting Committee: MT 3-2 - TC 88/MT 3-2
• Current Stage: PPUB - Publication issued
• Start Date: 14-Aug-2018
• Completion Date: 05-Apr-2019

Standards Content (Sample)

IEC TS 61400-3-2
®

Edition 1.0 2019-04
TECHNICAL
SPECIFICATION

colour
inside


Wind energy generation systems –
Part 3-2: Design requirements for floating offshore wind turbines
IEC TS 61400-3-2:2019-04(en)

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IEC TS 61400-3-2

®


Edition 1.0 2019-04




TECHNICAL



SPECIFICATION








colour

inside










Wind energy generation systems –

Part 3-2: Design requirements for floating offshore wind turbines



























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ICS 27.180 ISBN 978-2-8322-5986-3



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– 2 – IEC TS 61400-3-2:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Symbols and abbreviated terms . 12
4.1 Symbols and units. 12
4.2 Abbreviations . 12
5 Principal elements . 12
5.2 Design methods .
...