This British Standard is the UK implementation of EN The text of the International Standard IEC was approved. Buy IEC Ed. Wind turbines Part 3: Design requirements for offshore wind turbines from SAI Global. The text of document 88//FDIS, future edition 1 of IEC , turbines, was submitted to the IEC-CENELEC parallel vote and was.
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Wind classes determine which turbine ie suitable for the normal wind conditions of a particular site. Some of these standards provide technical conditions verifiable by an independent, third partyand as such are necessary in order to make business agreements so wind turbines can be financed and erected. Turbine classes are determined by three parameters – the average wind speed, extreme year gust, and turbulence.
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This page was last edited on 26 Septemberat In flat terrain the wind speed increases logarithmically with height. This article includes a list of referencesrelated reading or external linksbut its sources remain unclear because it lacks inline citations. For small wind turbines the global industry has 16400-3 working towards harmonisation of certification requirements with a “test once, certify everywhere” objective. The common set of standards sometimes replace the various national standards, forming a basis for global certification.
Retrieved 14 6140-3 Retrieved 7 October Languages Deutsch Edit links.
Wind turbines are capital intensive, and are usually purchased before they are being erected and commissioned. Wind turbine classes” Vestas.
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During the construction and design phase assumptions are made about the wind climate that the wind turbines will be exposed to. Because the fatigue loads of a number of major components in a wind turbine are mainly caused by turbulence, the knowledge of how turbulent a site is of crucial importance. Please help to improve this article by introducing more precise citations. In complex terrain the wind profile is not a simple increase and additionally a separation of the flow might occur, leading to heavily increased turbulence.
The extreme wind speeds are based on the 3 second average wind speed.
IEC started standardizing international certification on the subject inand the first standard appeared in List of International Electrotechnical Commission standards. Archived from the original on 7 October An update for IEC is scheduled for Views Read Edit View history.
Retrieved 18 March From Wikipedia, the free encyclopedia. National Renewable Energy Laboratory participates in IEC iiec development work,   and tests equipment according to these standards. Turbine wind class is just one of the factors needing consideration during the complex process of planning a wind power plant.
It is also possible to use the IEC standard for turbines of less than m 2 swept area. Turbulence intensity quantifies how much the wind varies typically within 10 minutes.
Wind turbines are designed for specific conditions. Retrieved from ” https: Basic Aspects” Suzlon Energy. March Learn how and when to remove this template message.
The standard concerns most aspects of the turbine life from site conditions before construction, to turbine components being tested,  assembled and operated.
Normally the wind speed increases with increasing height. This is the definition in IEC edition 2. Small wind turbines are defined as being of up to m 2 swept area and a somewhat simplified IEC standard addresses these. Webarchive template wayback links 614000-3 lacking in-text citations from March All articles lacking in-text citations Use British English Oxford spelling from January