SIST EN IEC 61400-12:2022

Wind energy generation systems - Part 12: Power performance measurements of electricity producing wind turbines - Overview (IEC 61400-12:2022)

The IEC 61400 series of standards addresses wind energy generation technical requirements up to the point of interconnection with the utility grid system. Part 12 of the IEC 61400 series of standards comprises a sub-set of standards which are to be used in the evaluation and measurement of the power performance characteristics of wind turbines. The power performance characterisation of wind turbines of all types and sizes is covered.
Wind turbine power performance characteristics are determined from a measured power curve and an associated estimated annual energy production (AEP) and its uncertainty. The measured power curve, defined as the relationship between the wind speed and the wind turbine power output, is determined by collecting simultaneous measurements of meteorological variables (including wind speed), as well as wind turbine signals (including power output) at the test site for a period that is long enough to establish a statistically significant database over a range of wind speeds and under varying wind and atmospheric conditions. The AEP is calculated by applying the measured power curve to reference wind speed frequency distributions, assuming 100 % availability.
Part 12-0 provides a general introduction to the available options for power performance measurement and the contributing evaluations which are further detailed in the other parts of the IEC 61400-12 series. Although the -12 series also defines the specifications of the meteorological variables (and in particular wind speed) required for the power performance evaluation, the methods and procedures for measuring or otherwise acquiring the wind speed data are defined in the IEC 61400-50 wind measurement series of standards.
The evaluation of the wind turbine power performance characteristic according to this series of standards requires the measured power curve and derived energy production figures to be supplemented by an assessment of uncertainty sources and their combined effects. The basis of the uncertainty assessment is ISO/IEC Guide 98-3. The wind measurement uncertainty sources shall be identified and quantified from procedures described in the relevant wind measurement standards contained in the IEC 61400-50 series. The wind measurement uncertainties shall be propagated through to and combined with the other sources of uncertainty in the power curve and annual energy production using methods and assumptions described in the IEC 61400-12 series of standards.

Windenergieanlagen - Teil 12: Messung des Leistungsverhaltens von Windenergieanlagen - Überblick (IEC 61400-12:2022)

Systèmes de génération d’énergie éolienne - Partie 12: Mesurages de performance de puissance des éoliennes de production d’électricité - Vue d’ensemble (IEC 61400-12:2022)

L'IEC 61400-12:2022 définit les procédures d'évaluation des caractéristiques de performance de puissance des éoliennes. Le présent document fournit une introduction générale aux options disponibles des mesurages de performance de puissance et des évaluations de contribution présentes dans les autres parties de la série IEC 61400-12, avec de plus amples informations. La présente première édition de l'IEC 61400-12 fait partie d'une révision structurelle qui annule et remplace les normes de performance IEC 61400-12-1:2017 et IEC 61400‑12‑2:2013. Cette révision structurelle ne contient aucune modification technique par rapport à l'IEC 61400‑12‑1:2017 et l'IEC 61400-12‑2:2013. Toutefois, les parties relatives aux mesurages du vent, au mesurage de l'étalonnage du site et à l'évaluation des obstacles et du terrain ont été extraites vers des normes distinctes.

Sistemi za proizvodnjo energije na veter - 12. del: Preskušanje zmogljivosti vetrnih turbin za proizvodnjo električne energije - Pregled (IEC 61400-12:2022)

General Information

• Status: Published
• Publication Date: 25-Oct-2022
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: IEHT - Electrotechnics - Hydraulic turbins
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 19-Oct-2022
• Due Date: 24-Dec-2022
• Completion Date: 26-Oct-2022
• Ref Project: EN IEC 61400-12:2022 - Wind energy generation systems - Part 12: Power performance measurements of electricity producing wind turbines - Overview

Relations

• Revised: SIST EN 61400-12-1:2017/AC:2020 - Wind energy generation systems - Part 12-1: Power performance measurements of electricity producing wind turbines (IEC 61400-12-1:2017/COR2:2020)
• Effective Date: 29-Nov-2022
• Revised: SIST EN 61400-12-2:2013 - Wind turbines - Part 12-2: Power performance of electricity producing wind turbines based on nacelle anemometry
• Effective Date: 29-Nov-2022
• Revised: SIST EN 61400-12-1:2017 - Wind power generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines (IEC 61400-12-1:2017)
• Effective Date: 29-Nov-2022
• Revised: SIST EN 61400-12-1:2017/AC:2021 - Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines (IEC 61400-12-1:2017/COR3:2021)
• Effective Date: 29-Nov-2022
• Revised: SIST EN 61400-12-1:2017/AC:2020 - Wind energy generation systems - Part 12-1: Power performance measurement of electricity producing wind turbines (IEC 61400-12-1:2017/COR1:2019)
• Effective Date: 29-Nov-2022
• Revised: SIST EN 61400-12-2:2013/AC:2016 - Wind turbines - Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry (IEC 61400-12-2:2013/COR1:2016)
• Effective Date: 29-Nov-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 61400-12:2022
01-december-2022
Sistemi za proizvodnjo energije na veter - 12. del: Preskušanje zmogljivosti vetrnih
turbin za proizvodnjo električne energije - Pregled (IEC 61400-12:2022)
Wind energy generation systems - Part 12: Power performance measurements of
electricity producing wind turbines - Overview (IEC 61400-12:2022)
Windenergieanlagen - Teil 12: Messung des Leistungsverhaltens von
Windenergieanlagen - Überblick (IEC 61400-12:2022)
Systèmes de génération d’énergie éolienne - Partie 12: Mesurages de performance de
puissance des éoliennes de production d’électricité - Vue d’ensemble (IEC 61400-
12:2022)
Ta slovenski standard je istoveten z: EN IEC 61400-12:2022
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
SIST EN IEC 61400-12:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61400-12:2022

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SIST EN IEC 61400-12:2022


EUROPEAN STANDARD EN IEC 61400-12

NORME EUROPÉENNE

EUROPÄISCHE NORM October 2022
ICS 27.180

English Version
Wind energy generation systems - Part 12: Power performance
measurements of electricity producing wind turbines - Overview
(IEC 61400-12:2022)
Systèmes de génération d'énergie éolienne - Partie 12: Windenergieanlagen - Teil 12: Messung des
Mesurages de performance de puissance des éoliennes de Leistungsverhaltens von Windenergieanlagen - Überblick
production d'électricité - Vue d'ensemble (IEC 61400-12:2022)
(IEC 61400-12:2022)
This European Standard was approved by CENELEC on 2022-10-10. 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 61400-12:2022 E

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SIST EN IEC 61400-12:2022
EN IEC 61400-12:2022 (E)
European foreword
The text of document 88/830/CDV, future edition 1 of IEC 61400-12, prepared by IEC/TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 61400-12:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-07-10
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-10-10
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 61400-12:2022 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated:
IEC 61400-2 NOTE Harmonized as EN 61400-2
2

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SIST EN IEC 61400-12:2022
EN IEC 61400-12:2022 (E)
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
IEC 61400-12-1 - Wind energy generation systems - Part 12- EN IEC 61400-12-1 -
1: Power performance measurement of
electricity producing wind turbines
IEC 61400-12-2 - Wind energy generation systems - Part 12- EN IEC 61400-12-2 -
2: Power performance of electricity
producing wind turbines based on nacelle
anemometry
IEC 61400-12-3 - Wind energy generation systems - Part 12- EN IEC 61400-12-3 -
3: Power performance - Measurement
based site calibration
IEC 61400-12-5 - Wind energy generation systems - Part 12- EN IEC 61400-12-5 -
5: Power performance - Assessment of
obstacles and terrain
IEC 61400-12-6 - Wind energy generation systems - Part 12- EN IEC 61400-12-6 -
6: Measurement based nacelle transfer
function of electricity producing wind
turbines
IEC 61400-50 - Wind energy generation systems - Part 50: EN IEC 61400-50 -
Wind measurement - Overview
1
IEC 61400-50-1 - Wind energy generation systems - Part 50- EN IEC 61400-50-1 -
1: Wind Measurement - Application of
Meteorological Mast, Nacelle and Spinner
Mounted Instruments
IEC 61400-50-2 - Wind energy generation systems - Part 50- EN IEC 61400-50-2 -
2: Wind measurement - Application of
ground-mounted remote sensing
technology
IEC 61400-50-3 - Wind energy generation systems - Part 50- EN IEC 61400-50-3 -
3: Use of nacelle-mounted lidars for wind
measurements


1
Under preparation. Stage at the time of publication: FprEN IEC 61400-50-1:2022.
3

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SIST EN IEC 61400-12:2022

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SIST EN IEC 61400-12:2022




IEC 61400-12

®


Edition 1.0 2022-09




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE
colour

inside










Wind energy generation systems –

Part 12: Power performance measurements of electricity producing wind

turbines – Overview




Systèmes de génération d'énergie éolienne –

Partie 12: Mesurages de performance de puissance des éoliennes de production


d'électricité – Vue d'ensemble













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 27.180 ISBN 978-2-8322-5620-6




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 61400-12:2022
– 2 – IEC 61400-12:2022  IEC 2022
CONTENTS
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Symbols, units and abbreviated terms . 8
5 Power performance method overview . 9
6 Interfaces between International Standards . 12
Bibliography . 14

Figure 1 – Overview of relationship between standards in the IEC 61400-12 and
IEC 61400-50 series . 13

Table 1 – Overview of wind measurement configurations for power curve
measurements that meet the requirements of this document . 12

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SIST EN IEC 61400-12:2022
IEC 61400-12:2022  IEC 2022 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

WIND ENERGY GENERATION SYSTEMS –

Part 12: Power performance measurements
of electricity producing wind turbines – Overview

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
IEC 61400-12 has been prepared by IEC technical committee 88: Wind energy generation
systems. It is an International Standard.
This first edition of IEC 61400-12 is part of a structural revision that cancels and replaces the
performance standards IEC 61400-12-1:2017 and IEC 61400-12-2:2013. The structural revision
contains no technical changes with respect to IEC 61400-12-1:2017 and IEC 61400-12-2:2013,
but the parts that relate to wind measurements, measurement of site calibration and assessment
of obstacle and terrain have been extracted into separate standards.
The purpose of the re-structure was to allow the future management and revision of the power
performance standards to be carried out more efficiently in terms of time and cost and to provide
a more logical division of the wind measurement requirements into a series of separate
standards which could be referred to by other use case standards in the IEC 61400 series and
subsequently maintained and developed by appropriate experts.

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SIST EN IEC 61400-12:2022
– 4 – IEC 61400-12:2022  IEC 2022
The text of this International Standard is based on the following documents:
Draft Report on voting
88/830/CDV 88/866/RVC

Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/standardsdev/publications.
A list of all parts in the IEC 61400 series, published under the general title Wind energy
generation systems, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it
contains colours which are considered to be useful for the correct understanding of its
contents. Users should therefore print this document using a colour printer.

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SIST EN IEC 61400-12:2022
IEC 61400-12:2022  IEC 2022 – 5 –
INTRODUCTION
The IEC 61400-12 series comprises a sub-set of standards which are for use in the evaluation
and measurement of the power performance characteristics of wind turbines. The power
performance characterization of wind turbines of all types and sizes is covered.
IEC TC 88 has made this revision to reduce the complexity and to improve the maintainability
of the previous version. Wind measurement procedures have been extracted from the
performance standard, recognizing that wind measurements need to be referenced from other
standards, such as in loads, noise and resource assessment measurements. IEC TC 88
recommends that the restructured standards gradually take over the previous standards before
Maintenance Cycle Reports are written on the restructured standards introducing new technical
requirements. Revision of the restructured documents should be proposed at the same time to
incorporate such technical changes, recommendations, clarifications and simplifications.
The purpose of the IEC 61400-12 series is to provide a uniform methodology that will ensure
consistency, accuracy and reproducibility in the measurement and analysis of power
performance by wind turbines. These International Standards have been prepared with the
anticipation that they would be applied by:
a) a wind turbine manufacturer striving to meet well-defined power performance requirements
and/or a possible declaration system;
b) a wind turbine purchaser in specifying such performance requirements;
c) a wind turbine operator who can be required to verify that stated, or required, power
performance specifications are met for new or refurbished units;
d) a wind turbine planner or regulator who needs to be able to accurately and fairly define
power performance characteristics of wind turbines in response to regulations or permit
requirements for new or modified installations.
The IEC 61400-12 series provides guidance in the measurement, analysis, and reporting of
power performance testing for wind turbines. These International Standards will benefit those
parties involved in the manufacture, installation planning and permitting, operation, utilization,
and regulation of wind turbines. The technically accurate measurement and analysis techniques
recommended in these standards should be applied by all parties to ensure that continuing
development and operation of wind turbines is carried out in an atmosphere of consistent and
accurate communication relative to wind turbine performance. These standards present
measurement and reporting procedures expected to provide accurate results that can be
replicated by others. Meanwhile, a user of these standards should be aware of differences in
performance or the measurement of performance that arise from large variations in wind shear
and turbulence. Not all of the test methods specified in the IEC 61400-12 series enable
quantification of the impact of shear and turbulence. Therefore, a user should consider the
influence of these differences, the most appropriate test method/standard and the data selection
criteria in relation to the purpose of the test before contracting the power performance
measurements.
Procedures for calibration, classification and uncertainty assessment of cup anemometers and
ultrasonic anemometers are given in IEC 61400-50-1. Procedures for calibration, classification
and uncertainty assessment of remote sensing devices are given in IEC 61400-50-2. Special
care should be taken in the selection of the instruments chosen to measure the wind speed
because it can influence the result of the power performance test.

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– 6 – IEC 61400-12:2022  IEC 2022
WIND ENERGY GENERATION SYSTEMS –

Part 12: Power performance measurements
of electricity producing wind turbines – Overview



1 Scope
This part of IEC 61400 defines procedures for assessing the power performance characteristics
of wind turbines.
This document provides a general introduction to the available options for power performance
measurement and the contributing evaluations which are further detailed in the other parts of
the IEC 61400-12 series. Although this document (along with other parts of the IEC 61400-12
series) also defines the specifications of the meteorological
...