EN IEC 61400-50-1:2022

Wind energy generation systems - Part 50-1: Wind measurement - Application of meteorological mast, nacelle and spinner mounted instruments

IEC 61400-50-1:2022 specifies methods and requirements for the application of instruments to measure wind speed (and related parameters, e.g. wind direction, turbulence intensity). Such measurements are required as an input to some of the evaluation and testing procedures for wind energy and wind turbine technology (e.g. resource evaluation and turbine performance testing) described by other standards in the IEC 61400 series. This document is applicable specifically to the use of wind measurement instruments mounted on meteorological masts, turbine nacelles or turbine spinners which measure the wind at the location at which the instruments are mounted. This document excludes remote sensing devices which measure the wind at some location distant from the location at which the instrument is mounted (e.g. vertical profile or forward facing lidars).

Windenergieanlagen - Teil 50-1: Windmessungen - Einsatz von meteorologischen Mast-, Gondel- und Spinner-Instrumenten

Systèmes de génération d'énergie éolienne - Partie 50-1: Mesurages du vent - Application d'instruments météorologiques montés sur mât, nacelle et nez de rotor

IEC 61400-50-1:2022 spécifie les méthodes et les exigences pour l'application des instruments de mesure de la vitesse du vent (et des paramètres associés, par exemple la direction du vent et l'intensité des turbulences). Ces mesurages sont exigés pour certaines procédures d'évaluation et d'essai de l'énergie éolienne et de la technologie des éoliennes (par exemple, l'évaluation des ressources et les essais de performance des éoliennes) décrites dans d'autres normes de la série IEC 61400. Le présent document s'applique spécifiquement à l'utilisation d'instruments de mesure du vent montés sur des mâts météorologiques, des nacelles d’éolienne ou des nez de rotors d’éolienne qui mesurent le vent à un endroit dans lequel les instruments sont montés. Le présent document exclut les dispositifs de télédétection qui mesurent le vent à un endroit éloigné de celui dans lequel l'instrument est monté (par exemple, les lidars à profil vertical ou orientés vers l'avant)

Sistemi za proizvodnjo energije na veter - 50-1. del: Meritve vetra - Uporaba meteoroloških instrumentov, pritrjenih na steber, v gondolo in na obod vetrnic (IEC 61400-50-1:2022)

IEC 61400-50-1:2022 določa metode in zahteve za uporabo instrumentov za merjenje hitrosti vetra (in povezanih parametrov, npr. smer vetra, intenzivnost turbulence). Vrednosti takšnih meritev so potrebne za nekatere postopke vrednotenja in preskušanja vetrne energije ter tehnologije vetrnih turbin (npr. vrednotenje virov in preskušanje delovanja turbin), ki jih opisujejo drugi standardi v skupini standardov IEC 61400. Ta dokument je namenjen posebej za uporabo meteoroloških instrumentov, nameščenih na steber, v gondole turbin ali na obod vetrnic, ki merijo veter na lokaciji, kjer so instrumenti nameščeni. Ta dokument ne vključuje naprav za daljinsko zaznavanje, ki merijo veter na neki lokaciji, ki je oddaljena od lokacije, na kateri je instrument nameščen (npr. navpični profil ali naprej usmerjeni lidarji).

General Information

• Status: Published
• Publication Date: 22-Dec-2022
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: CLC/TC 88 - Wind turbines
• Drafting Committee: IEC/TC 88 - IEC_TC_88
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 23-Dec-2022
• Due Date: 30-Jul-2021
• Completion Date: 23-Dec-2022
• Ref Project: SIST EN IEC 61400-50-1:2023 - Wind energy generation systems - Part 50-1: Wind measurement - Application of meteorological mast, nacelle and spinner mounted instruments (IEC 61400-50-1:2022)

Relations

• Replaces: EN 61400-12-1:2017/AC:2019-12 - Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines
• Effective Date: 27-Dec-2022
• Replaces: EN 61400-12-1:2017 - Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines
• Effective Date: 27-Dec-2022
• Replaces: EN 61400-12-1:2017/AC:2021-06 - Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines
• Effective Date: 27-Dec-2022
• Replaces: EN 61400-12-2:2013/AC:2016-10 - Wind turbines - Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry
• Effective Date: 27-Dec-2022
• Replaces: EN 61400-12-2:2013 - Wind turbines - Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry
• Effective Date: 27-Dec-2022
• Replaces: EN 61400-12-1:2017/AC:2020-04 - Wind energy generation systems - Part 12-1: Power performance measurements of electricity producing wind turbines
• Effective Date: 27-Dec-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2023
Sistemi za proizvodnjo energije na veter - 50-1. del: Meritve vetra - Uporaba
meteoroloških instrumentov, pritrjenih na steber, v gondolo in na obod vetrnic
(IEC 61400-50-1:2022)
Wind energy generation systems - Part 50-1: Wind measurement - Application of
meteorological mast, nacelle and spinner mounted instruments (IEC 61400-50-1:2022)
Windenergieanlagen - Teil 50-1: Windmessungen - Einsatz von meteorologischen Mast-,
Gondel- und Spinner-Instrumenten (IEC 61400-50-1:2022)
Systèmes de génération d'énergie éolienne - Partie 50-1: Mesurages du vent -
Application d'instruments météorologiques montés sur mât, nacelle et nez de rotor (IEC
61400-50-1:2022)
Ta slovenski standard je istoveten z: EN IEC 61400-50-1:2022
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 61400-50-1

NORME EUROPÉENNE
EUROPÄISCHE NORM December 2022
ICS 27.180 Supersedes EN 61400-12-2:2013 (partially); EN 61400-
12-2:2013/AC:2016-10 (partially); EN 61400-12-1:2017
(partially); EN 61400-12-1:2017/AC:2019-12 (partially); EN
61400-12-1:2017/AC:2020-04 (partially); EN 61400-12-
1:2017/AC:2021-06 (partially)
English Version
Wind energy generation systems - Part 50-1: Wind
measurement - Application of meteorological mast, nacelle and
spinner mounted instruments
(IEC 61400-50-1:2022)
Systèmes de génération d'énergie éolienne - Partie 50-1: Windenergieanlagen - Teil 50-1: Windmessungen - Einsatz
Mesurages du vent - Application d'instruments von meteorologischen Mast-, Gondel- und Spinner-
météorologiques montés sur mât, nacelle et nez de rotor Instrumenten
(IEC 61400-50-1:2022) (IEC 61400-50-1:2022)
This European Standard was approved by CENELEC on 2022-12-21. 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
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61400-50-1:2022 E

European foreword
The text of document 88/902/FDIS, future edition 1 of IEC 61400-50-1, prepared by IEC/TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-50-1:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-09-21
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-12-21
document have to be withdrawn
This document partially supersedes EN 61400-12-2:2013 and EN 61400-12-1:2017 and all of their
amendments and corrigenda (if any).
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 61400-50-1:2022 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 61400-50-2 NOTE Harmonized as EN IEC 61400-50-2
IEC 61400-1:2019 NOTE Harmonized as EN IEC 61400-1:2019 (not modified)
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.cenelec.eu.
Publication Year Title EN/HD Year
ISO 2533 1975 Standard Atmosphere - -
ISO 3966 - Measurement of fluid flow in closed conduits - - -
Velocity area method using Pitot static tubes
ISO/IEC Guide 98-3 2008 Uncertainty of measurement - Part 3: Guide to - -
the expression of uncertainty in measurement
(GUM:1995)
IEC 61400-50-1 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Wind energy generation systems –

Part 50-1: Wind measurement – Application of meteorological mast, nacelle and

spinner mounted instruments
Systèmes de génération d'énergie éolienne

Partie 50-1: Mesurages du vent – Application d'instruments météorologiques

montés sur mât, nacelle et nez de rotor

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.180 ISBN 978-2-8322-5937-5

– 2 – IEC 61400-50-1:2022 © IEC 2022
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Symbols, units and abbreviated terms . 11
5 General . 16
6 Classification of cup and sonic anemometry . 16
6.1 General . 16
6.2 Classification classes . 17
6.3 Influence parameter ranges . 17
6.4 Classification of cup and sonic anemometers . 17
6.5 Reporting format . 19
7 Assessment of cup and sonic anemometry . 19
7.1 General . 19
7.2 Measurements of anemometer characteristics . 19
7.2.1 Measurements in a wind tunnel for tilt angular response characteristics
of cup anemometers . 19
7.2.2 Wind tunnel measurements of directional characteristics of cup
anemometers . 21
7.2.3 Wind tunnel measurements of cup anemometer rotor torque
characteristics . 21
7.2.4 Wind tunnel measurements of step responses of cup anemometers . 22
7.2.5 Measurement of temperature induced effects on anemometer
performance . 23
7.2.6 Wind tunnel measurements of directional characteristics of sonic
anemometers . 24
7.3 A cup anemometer classification method based on wind tunnel and
laboratory tests and cup anemometer modelling . 25
7.3.1 Method . 25
7.3.2 Example of a cup anemometer model . 25
7.4 A sonic anemometer classification method based on wind tunnel tests and
sonic anemometer modelling . 32
7.5 Free field comparison measurements . 32
8 Wind tunnel calibration procedure for anemometers . 32
8.1 General requirements . 32
8.2 Requirements for the wind tunnel . 33
8.3 Instrumentation and calibration setup requirements . 35
8.4 Calibration procedure . 35
8.4.1 General procedure for cup and sonic anemometers . 35
8.4.2 Procedure for the calibration of sonic anemometers . 36
8.4.3 Determination of the wind speed at the anemometer position . 36
8.5 Data analysis . 37
8.6 Uncertainty analysis . 37
8.7 Reporting format . 38
8.8 Example uncertainty calculation . 39

IEC 61400-50-1:2022 © IEC 2022 – 3 –
9 In-situ comparison of anemometers . 42
9.1 General . 42
9.2 Prerequisite . 42
9.3 Analysis method . 42
9.4 Evaluation criteria . 43
10 Mounting of instruments on the meteorological mast . 45
10.1 General . 45
10.2 Single top-mounted anemometer. 46
10.3 Side-by-side top-mounted anemometers . 47
10.4 Side-mounted instruments . 49
10.4.1 General . 49
10.4.2 Tubular meteorological masts . 49
10.4.3 Lattice meteorological masts . 51
10.4.4 Flow distortion correction of side-mounted anemometers . 56
10.5 Lightning protection . 56
10.6 Mounting of other meteorological instruments . 56
10.7 Data acquisition system . 57
11 Uncertainty of wind speed measurement . 57
11.1 Category B uncertainties: Wind speed – Introduction .
...