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
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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

– 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

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
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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.

– 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.

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 wi
...