前言:这是CAN/CSA-C61400-3《风力涡轮机-第3部分:海上风力涡轮机的设计要求》的第一版，采用了同名的IEC（国际电工委员会）标准61400-3（第一版，2009-02），但有加拿大的偏差。范围:IEC 61400的本部分规定了海上风力涡轮机现场外部条件评估的附加要求，并规定了确保海上风力涡轮机工程完整性的基本设计要求。其目的是在计划寿命内提供适当级别的保护，防止所有危险造成的损害。 本标准侧重于海上风力涡轮机结构部件的工程完整性，但也涉及控制和保护机制、内部电气系统和机械系统等子系统。如果支撑结构承受水动力荷载，则风力涡轮机应视为海上风力涡轮机。本标准中规定的设计要求不一定足以确保浮式海上风力涡轮机的工程完整性。本标准应与第2条中提到的适当IEC和ISO标准一起使用。 特别是，本标准完全符合IEC 61400-1的要求。根据本标准设计的海上风力涡轮机的安全水平应达到或超过IEC 61400-1中固有的水平。在一些条款中，如果要求的全面陈述有助于澄清，则包括复制IEC 61400-1中的文本。

Preface:This is the first edition of CAN/CSA-C61400-3,Wind turbines - Part 3: Design requirements for offshore wind turbines, which is an adoption, with Canadian deviations, of the identically titled IEC (International Electrotechnical Commission) Standard 61400-3 (first edition, 2009-02).Scope:This part of IEC 61400 specifies additional requirements for assessment of the external conditions at an offshore wind turbine site and it specifies essential design requirements to ensure the engineering integrity of offshore wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime.This Standard focuses on the engineering integrity of the structural components of an offshore wind turbine 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 an offshore wind turbine if the support structure is subject to hydrodynamic loading. The design requirements specified in this standard are not necessarily sufficient to ensure the engineering integrity of floating offshore wind turbines.This Standard should be used together with the appropriate IEC and ISO standards mentioned in Clause 2. In particular, this standard is fully consistent with the requirements of IEC 61400-1. The safety level of the offshore wind turbine designed according to this standard shall be at or exceed the level inherent in IEC 61400-1. In some clauses, where a comprehensive statement of requirements aids clarity, replication of text from IEC 61400-1 is included.