International Standards and Conformity Assessment for all electrical, electronic and related technologies

TC 88

Wind energy generation systems

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PT 61400-3-2 Project Leader & Members

Project Leader

Mr Lars Samuelsson
Mr Hyunkyoung Shin
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Mr Hyungtaek AhnKR
Mr Sadao AkahoshiJP
Mr Kimon ArgyriadisDE
Mr Frans BrughuisNL
Mr Tim R CampGB
Mr Harkjin EumKR
Mr Philipp GujerDE
Mr Erik Asp HansenDK
Mr Yoshiyuki HayashiJP
Mr Alexander HeitmannDE
Mrs Anne Lene Haukanes HopstadNO
Mr Shunji InoueJP
Mr Toshiya IwashitaJP
Mr Jason JonkmanUS
Mr Michael KastZA
Mr Mann-Eung KimKR
Mr Sookrae KimKR
Mr Masao KomatsuJP
Mr Kiyeong kweonKR
Mr Kang-Su LeeKR
Mr Sang Lae LeeKR
Mr Heechang LimKR
Mr James ManwellUS
Mr Denis MathaDE
Mr Takatoshi MatsushitaJP
Mr Torgeir MoanNO
Mr Juan Moya GarcíaES
Mr Toshihiko NagaiJP
Mr James Alexander NicholsGB
Mr Jinho ParkKR
Mr Jungsoo RyueKR
Mr Jesper Winther StærdahlDK
Mr Hideyuki SuzukiJP
Mr Hirofumi TakanoJP
Mr Ryoichi TakemotoJP
Mr Luca VitaDK
Mr Atsushi YamaguchiJP
Mr Yuki YoshidaJP
Mr Yu ZhangCN

Title & Task

PT 61400-3-2

Design requirements for floating offshore wind turbines


This part of IEC 61400 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 FOWT’s. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime.

This Technical Specification 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 shall be considered as a FOWT, if the floating sub-structure 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 sub-structure, the station keeping system and the on-board machinery, equipment and systems that are not part of the RNA.

This Technical Specification is applicable to unmanned floating structures with one single horizontal axis turbine. Additional considerations may be needed for multi-turbine units on a single floating sub-structure, vertical-axis wind turbines, or combined wind/wave energy systems.