SIST EN IEC 61400-15-1:2025
(Main)Wind energy generation systems - Part 15-1: Site suitability input conditions for wind power plants (IEC 61400-15-1:2025)
Wind energy generation systems - Part 15-1: Site suitability input conditions for wind power plants (IEC 61400-15-1:2025)
IEC 61400-15-1:2025 defines a framework for assessment and reporting of the wind turbine suitability conditions for both onshore and offshore wind power plants. This includes:
a) definition, measurement, and prediction of the long-term meteorological and wind flow characteristics at the site;
b) integration of the long-term meteorological and wind flow characteristics with wind turbine and balance-of-plant characteristics;
c) characterizing environmental extremes and other relevant plant design drivers;
d) addressing documentation and reporting requirements to help ensure the traceability of the assessment processes.
This document is framed to complement and support the scope of related IEC 61400 series by defining environmental input conditions. It is not intended to supersede the design and suitability requirements presented in those documents. Specific analytical and modelling procedures as described in IEC 61400-1, IEC 61400-2, IEC 61400-3-1 and IEC TS 61400-3-2 are excluded from the scope of this document.
Windenergieanlagen - Teil 15-1: Eingangsbedingungen für die Standorteignung von Windkraftwerken (IEC 61400-15-1:2025)
Systèmes de génération d'énergie éolienne - Partie 15-1: Conditions à remplir pour l’acceptabilité d’un site de centrale éolienne (IEC 61400-15-1:2025)
l’IEC 61400-15-1:2025 consiste à définir un cadre pour l'évaluation et le rapport des conditions d'acceptabilité d'un site/des éoliennes (fixes ou flottantes) tant pour les centrales terrestres que pour les centrales en mer. Il comprend:
a) définition, mesurage et prévision des caractéristiques météorologiques et d'écoulement du vent à long terme sur le site;
b) intégration des caractéristiques météorologiques et d'écoulement du vent à long terme avec les caractéristiques d’éoliennes et d'équilibre des centrales;
c) caractérisation des extrêmes environnementaux et des autres facteurs applicables pour la conception des centrales;
d) traitement des exigences relatives à la documentation et aux rapports afin d’assurer la traçabilité des processus d'évaluation.
Le présent document est conçu pour compléter et venir à l'appui le domaine d'application de la série IEC 61400 connexe en définissant les conditions environnementales à remplir. Il n'est pas destiné à remplacer les exigences de conception et d'acceptabilité présentées dans ces documents. Les procédures spécifiques d'analyse et de modélisation décrites dans l’IEC 61400-1, l’IEC 61400-2, l’IEC 61400-3-1 et l’IEC TS 61400-3-2 sont exclues du domaine d'application du présent document.
Sistemi za proizvodnjo energije na veter - 15-1. del: Vhodni pogoji glede primernosti mesta namestitve vetrnih elektrarn (IEC 61400-15-1:2025)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-julij-2025
Sistemi za proizvodnjo energije na veter - 15-1. del: Vhodni pogoji glede
primernosti mesta namestitve vetrnih elektrarn (IEC 61400-15-1:2025)
Wind energy generation systems - Part 15-1: Site suitability input conditions for wind
power plants (IEC 61400-15-1:2025)
Windenergieanlagen - Teil 15-1: Eingangsbedingungen für die Standorteignung von
Windkraftwerken (IEC 61400-15-1:2025)
Systèmes de génération d'énergie éolienne - Partie 15-1: Conditions à remplir pour
l’acceptabilité d’un site de centrale éolienne (IEC 61400-15-1:2025)
Ta slovenski standard je istoveten z: EN IEC 61400-15-1:2025
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN IEC 61400-15-1
NORME EUROPÉENNE
EUROPÄISCHE NORM May 2025
ICS 27.180
English Version
Wind energy generation systems - Part 15-1: Site suitability input
conditions for wind power plants
(IEC 61400-15-1:2025)
Systèmes de génération d'énergie éolienne - Partie 15-1: Windenergieanlagen - Teil 15-1: Eingangsbedingungen für
Conditions à remplir pour l'acceptabilité d'un site pour les die Standorteignung von Windkraftwerken
centrales éoliennes (IEC 61400-15-1:2025)
(IEC 61400-15-1:2025)
This European Standard was approved by CENELEC on 2025-04-18. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61400-15-1:2025 E
European foreword
The text of document 88/1041/FDIS, future edition 1 of IEC 61400-15-1, prepared by TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-15-1:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-05-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-05-31
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61400-15-1:2025 was approved by CENELEC as a
European Standard without any modification.
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1 Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 61400-1 2019 Wind energy generation systems - Part 1: EN IEC 61400-1 2019
Design requirements
IEC 61400-3-1 2019 Wind energy generation systems - Part 3- EN IEC 61400-3-1 2019
1: Design requirements for fixed offshore
wind turbines
IEC 61400-12-1 2022 Wind energy generation systems - Part 12- EN IEC 61400-12-1 2022
1: Power performance measurement of
electricity producing wind turbines
ISO 2533 1975 Standard Atmosphere - -
ISO/IEC 21778 2017 Information technology - The JSON data - -
interchange syntax
ISO/IEC 10646 2020 Information technology - Universal coded - -
character set (UCS)
ISO 3166 - Country codes - -
IEC 61400-15-1 ®
Edition 1.0 2025-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Wind energy generation systems –
Part 15-1: Site suitability input conditions for wind power plants
Systèmes de génération d'énergie éolienne –
Partie 15-1: Conditions à remplir pour l'acceptabilité d'un site pour les centrales
éoliennes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.180 ISBN 978-2-8327-0269-7
– 2 – IEC 61400-15-1:2025 © IEC 2025
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Symbols, units and abbreviated terms . 10
4.1 Symbols and units . 10
4.2 Abbreviated terms. 10
5 Methods to determine turbine suitability input parameters . 11
5.1 General . 11
5.2 Assessment of wind speed . 12
5.2.1 Wind speed distribution . 12
5.2.2 Extreme wind speed with a recurrence interval of 50 years . 12
5.3 Assessment of turbulence intensity . 14
5.3.1 Ambient turbulence intensity . 14
5.3.2 Extreme ambient turbulence intensity . 16
5.3.3 Turbulence structure correction parameter. 16
5.4 Inflow angle . 16
5.5 Wind shear . 16
5.5.1 General. 16
5.5.2 Spatial extrapolation of wind shear . 17
5.6 Temperature . 18
5.7 Air density . 18
5.8 Site conditions modelling close to significant structures and obstacles . 19
Annex A (normative) Requirements to fill out Site Suitability Input Conditions Form . 20
A.1 Overview . 20
A.2 Turbine layout summary . 20
A.3 Measurement device summary . 21
A.4 Expected annual wind frequency distribution (%) . 21
A.5 Expected annual wind speed Weibull distribution (%) . 22
A.6 Turbulence intensity (TI) . 22
A.7 Standard deviation of turbulence intensity . 23
A.8 Extreme ambient turbulence intensity . 23
A.9 Sector-wise Inflow angle. 23
A.10 Wind shear . 23
A.11 Temperature . 23
Annex B (normative) Turbine suitability input reporting . 24
B.1 General . 24
B.2 Reporting structure . 24
B.2.1 General. 24
B.2.2 General information. 24
B.2.3 Introduction . 24
B.2.4 Summary of site characteristics . 25
B.2.5 Project description . 25
B.2.6 Wind input data. 25
B.2.7 Long-term adjusted wind data . 26
IEC 61400-15-1:2025 © IEC 2025 – 3 –
B.2.8 Flow modelling . 26
B.2.9 Site suitability parameters . 27
B.2.10 References. 27
Annex C (informative) Estimation of extreme wind speed distribution . 28
C.1 General . 28
C.2 Selection of high wind events . 28
C.3 Extreme value distribution fitting . 28
Annex D (informative) Extreme winds long-term adjustment . 29
Annex E (informative) Temporal and spatial resolution correction for mesoscale model
simulation results . 30
E.1 General . 30
E.2 Temporal resolution . 30
E.3 Spatial resolution . 30
Annex F (normative) Data exchange format for site suitability input conditions . 31
F.1 General . 31
F.2 Top level keys . 31
F.3 Description of each object . 32
Bibliography . 38
Figure F.1 – The definition of the wind speed bins . 32
Table F.1 – The contents of the top level keys . 31
Table F.2 – The keys in the object "Meta data" . 32
Table F.3 – The keys in the object "Project Information" . 33
Table F.4 – The keys in the objects of wind turbine IDs in the object "Turbine layout
...
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