SIST EN 61400-11:2003/A1:2006
(Main)Wind turbine generator systems -- Part 11: Acoustic noise measurement techniques
Wind turbine generator systems -- Part 11: Acoustic noise measurement techniques
Windenergieanlagen -- Teil 11: Schallmessverfahren
Aérogénérateurs -- Partie 11: Techniques de mesure du bruit acoustique
Sistemi generatorjev za vetrne turbine - 11. del: Tehnike merjenja hrupa (IEC 61400-11:2002/A1:2006)
General Information
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EUROPEAN STANDARD
EN 61400-11/A1
NORME EUROPÉENNE
June 2006
EUROPÄISCHE NORM
ICS 27.180
English version
Wind turbine generator systems
Part 11: Acoustic noise measurement techniques
(IEC 61400-11:2002/A1:2006)
Aérogénérateurs Windenergieanlagen
Partie 11: Techniques de mesure du bruit Teil 11: Schallmessverfahren
acoustique (IEC 61400-11:2002/A1:2006)
(CEI 61400-11:2002/A1:2006)
This amendment A1 modifies the European Standard EN 61400-11:2003; it was approved by CENELEC on
2006-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this amendment 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 Central Secretariat or to any CENELEC member.
This amendment 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
Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61400-11:2003/A1:2006 E
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EN 61400-11:2003/A1:2006 - 2 -
Foreword
The text of document 88/260/FDIS, future amendment 1 to IEC 61400-11:2002, prepared by IEC TC 88,
Wind turbines, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
amendment A1 to EN 61400-11:2003 on 2006-06-01.
The following dates were fixed:
– latest date by which the amendment has to be
implemented at national level by publication of
an identical national standard or by endorsement (dop) 2007-03-01
– latest date by which the national standards conflicting
with the amendment have to be withdrawn (dow) 2009-06-01
__________
Endorsement notice
The text of amendment 1:2006 to the International Standard IEC 61400-11:2002 was approved by
CENELEC as an amendment to the European Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61672-1 NOTE Harmonized as EN 61672-1:2003 (not modified).
__________
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INTERNATIONAL IEC
STANDARD 61400-11
2002
AMENDMENT 1
2006-05
Amendment 1
Wind turbine generator systems –
Part 11:
Acoustic noise measurement techniques
IEC 2006 Droits de reproduction réservés Copyright - all rights reserved
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale E
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue
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– 2 – 61400-11 Amend. 1 IEC:2006(E)
FOREWORD
This amendment has been prepared by IEC technical committee 88: Wind turbines.
The text of this amendment is based on the following documents:
FDIS Report on voting
88/260/FDIS 88/264/RVD
Full information on the voting for the approval of this amendment can be found in the report
on voting indicated in the above table.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date, the
publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
_____________
INTRODUCTION
This amendment to IEC 61400-11:2002 addresses special cases where 95 % of rated power
is reached below 10 m/s speed at 10 m height and for sites where wind speeds of 10 m/s at
10 m height are very rare. Furthermore a clarification on regression analysis and frequency
weighting is included.
Page 8
4 Symbols and units
Add the following new symbol:
V wind speed measured by the nacelle anemometer (m/s)
n
Page 9
5 Outline of method
Insert, after the fifth paragraph, the following text:
If this part of IEC 61400 is used for verification that actual noise emission is in accordance
with a reference/declared noise level, the verification measurement shall be made in
accordance with the present standard for a wind speed range given by:
– Annual average wind speed at 10 m height onsite ±1 m/s as a minimum. As a minimum,
three integer w
...
88/225/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJET DE COMITÉ POUR VOTE (CDV)
Project number IEC 61400-11 Amd. 1 Ed.2
Numéro de projet
IEC/TC or SC: Date of circulation Closing date for voting (Voting
TC 88
Date de diffusion mandatory for P-members)
CEI/CE ou SC:
Date de clôture du vote (Vote
2005-04-15
obligatoire pour les membres (P))
2005-09-16
TC/SC Title: Wind turbines
Titre du CE/SC:
Secretary: A.C. van der Giessen
Secrétaire:
Also of interest to the following committees Supersedes document
Intéresse également les comités suivants Remplace le document
88/190/CD - 88/198A/CC
Functions concerned
Fonctions concernées
Safety EMC Environment Quality assurance
Sécurité
CEM Environnement Assurance qualité
CE DOCUMENT EST TOUJOURS À L'ÉTUDE ET SUSCEPTIBLE DE THIS DOCUMENT IS STILL UNDER STUDY AND SUBJECT TO CHANGE. IT
MODIFICATION. IL NE PEUT SERVIR DE RÉFÉRENCE. SHOULD NOT BE USED FOR REFERENCE PURPOSES.
LES RÉCIPIENDAIRES DU PRÉSENT DOCUMENT SONT INVITÉS À RECIPIENTS OF THIS DOCUMENT ARE INVITED TO SUBMIT, WITH THEIR
PRÉSENTER, AVEC LEURS OBSERVATIONS, LA NOTIFICATION DES COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF
DROITS DE PROPRIÉTÉ DONT ILS AURAIENT ÉVENTUELLEMENT WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING
CONNAISSANCE ET À FOURNIR UNE DOCUMENTATION EXPLICATIVE. DOCUMENTATION.
Title : Amendment 1 to IEC 61400-11 Ed. 2: Wind turbine generator systems - Part 11: Acoustic
noise measurement techniques
Introductory note
Following circulation as a CD comments have been received, which have been addressed by MT
11. Resulting from this is the document below.
ATTENTION ATTENTION
CDV soumis en parallèle au vote (CEI) Parallel IEC CDV/CENELEC Enquiry
et à l’enquête (CENELEC)
Copyright © 2005 International Electrotechnical Commission, IEC. All rights reserved. It is
permitted to download this electronic file, to make a copy and to print out the content for the sole
purpose of preparing National Committee positions. You may not copy or "mirror" the file or
printed version of the document, or any part of it, for any other purpose without permission in
writing from IEC.
FORM CDV (IEC)
2002-08-09
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88/225/CDV
2
Scope
This amendment to 61400-11 ed. 2 addresses special cases where 95 % of rated power is reached below 10 m/s
at 10 m height and for sites where wind speeds of 10 m/s at 10 m height are very rare. Furthermore a clarification
on regression analysis and frequency weighting is included.
Amendment 1
5 Outline of method
Add the following sentences after the paragraph of “Measurements of sound pressure levels and
wind speeds are made … the apparent sound power levels” in page 10 of the standard:
If the standard is used for verification that actual noise emission is in accordance with a
reference/declared noise level, the verification measurement shall be made in accordance with the
present standard for a wind speed range given by
− Annual average wind speed at 10 m height onsite ±1 m/s as a minimum. As a minimum three
integer wind speed values and 8 m/s shall be reported (i.e. site average = 4.8 m/s, use 4, 5,
6, and 8 m/s).
− If the declaration measurements indicate that audible tones are present at other wind speeds,
these wind speeds shall be included as well.
Where local codes or contracts between parties involved (i.e. manufacturers, developers, owners) require
measurements at a different wind speed or wind speed range, the present standard shall be applied at those wind
speeds.
Amendment 2
7.2.2.3 Narrow band measurements
Contents of 7.2.2.3 of the ed. 2 shall be replaced by the following sentences:
For each integer wind speed, at least two minutes of A-weighted wind turbine noise and background noise
are required. These two minutes shall be as close as possible to the integer wind speeds. If the A-
weighting cannot be applied during measurement, linear spectra may be converted to A-weighted spectra
according to IEC 61672.
Amendment 3
Amendment 3 has additions and chan
...
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