CLC/TS 61400-26-1:2017

SLOVENSKI STANDARD
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Wind turbines - Part 26-1: Time-based availability for wind turbine generating systems
(IEC/TS 61400-26-1:2011)
Windenergieanlagen - Teil 26-1: Zeitbasierte Verfügbarkeit von Windenergieanlagen
(IEC/TS 61400-26-1:2011)
Éoliennes - Partie 26-1: Disponibilité temporelle pour les systèmes de production
d'énergie éolienne (IEC/TS 61400-26-1:2011)
Ta slovenski standard je istoveten z: CLC/TS 61400-26-1:2017
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC/TS 61400-26-1

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
September 2017
ICS 27.180
English Version
Wind turbines -
Part 26-1: Time-based availability
for wind turbine generating systems
(IEC/TS 61400-26-1:2011)
Éoliennes -  Windenergieanlagen -
Partie 26-1: Disponibilité temporelle Teil 26-1: Zeitbasierte Verfügbarkeit
pour les systèmes de production d'énergie éolienne von Windenergieanlagen
(IEC/TS 61400-26-1:2011) (IEC/TS 61400-26-1:2011)
This Technical Specification was approved by CENELEC on 2017-07-17.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC/TS 61400-26-1:2017 E

European foreword
This document (CLC/TS 61400-26-1:2017) consists of the text of IEC/TS 61400-26-1:2011 prepared
by IEC/TC 88 "Wind energy generation systems".
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.
Endorsement notice
The text of the International Standard IEC/TS 61400-26-1:2011 was approved by CENELEC as a
Technical Specification without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61400-25-2:2006 NOTE Harmonized as EN 61400-25-2:2007 (not modified).
IEC 61400-25-3:2006 NOTE Harmonized as EN 61400-25-3:2007 (not modified).
IEC 61400-25-4:2008 NOTE Harmonized as EN 61400-25-4:2008 (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 When 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 60050-415 1999 International Electrotechnical - -
Vocabulary - Part 415: Wind
turbine generator systems
IEC 61400-1 -  Wind turbines - Part 1: Design EN 61400-1 -
requirements
IEC/TS 61400-26-1 ®
Edition 1.0 2011-11
TECHNICAL
SPECIFICATION
colour
inside
Wind turbines –
Part 26-1: Time-based availability for wind turbine generating systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XA
ICS 27.180 ISBN 978-2-88912-780-1

– 2 – TS 61400-26-1 © IEC:2011(E)
CONTENTS
FOREWORD . 4
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviations . 7
3.1 Terms and definitions . 7
3.2 Abbreviations . 8
4 Information model . 9
4.1 General . 9
4.2 Information categories . 9
4.3 Limitations . 9
4.4 Information category priority . 11
5 INFORMATION AVAILABLE . 12
5.1 OPERATIVE . 13
5.1.1 GENERATING . 13
5.1.2 NON-GENERATING . 15
5.2 NON-OPERATIVE . 20
5.2.1 SCHEDULED MAINTENANCE . 21
5.2.2 PLANNED CORRECTIVE ACTION . 22
5.2.3 FORCED OUTAGE . 23
5.2.4 SUSPENDED . 24
5.3 FORCE MAJEURE . 24
6 INFORMATION UNAVAILABLE . 25
Annex A (informative) Optional information categories – examples . 27
Annex B (informative) Time based availability indicators – examples . 40
Annex C (informative) Verification scenarios – examples . 44
Bibliography . 53

Figure 1 – Information category overview . 10
Figure 2 – Information category priority . 11
Figure 3 – INFORMATION AVAILABLE category . 12
Figure 4 – OPERATIVE category . 13
Figure 5 – GENERATING category . 14
Figure 6 – FULL PERFORMANCE category . 14
Figure 7 – PARTIAL PERFORMANCE category . 15
Figure 8 – NON GENERATING category . 16
Figure 9 – TECHNICAL STANDBY category . 17
Figure 10 – OUT OF ENVIRONMENTAL SPECIFICATION category . 18
Figure 11 – REQUESTED SHUTDOWN category . 19
Figure 12 – OUT OF ELECTRICAL SPECIFICATION category . 20
Figure 13 – NON-OPERATIVE category . 21
Figure 14 – SCHEDULED MAINTENANCE category . 22
Figure 15 – PLANNED CORRECTIVE ACTION category. 23
Figure 16 – FORCED OUTAGE category . 23

TS 61400-26-1 © IEC:2011(E) – 3 –
Figure 17 – SUSPENDED category . 24
Figure 18 – FORCE MAJEURE category . 25
Figure 19 – INFORMATION UNAVAILABLE category . 26
Figure A.1 – Information category overview – mandatory and optional . 28
Figure A.2 – Optional categories for PARTIAL PERFORMANCE . 29
Figure A.3 – Derated category . 30
Figure A.4 – Degraded category . 30
Figure A.5 – Optional categories for OUT OF ENVIRONMENTAL SPECIFICATION . 31
Figure A.6 – Calm winds category . 32
Figure A.7 – Other environmental category . 33
Figure A.8 – Optional categories for NON-OPERATIVE . 34
Figure A.9 – Optional categories for forced outage . 35
Figure A.10 – Workflow breakdown structure . 36
Figure A.11 – Optional categories for SUSPENDED. 38
Figure C.1 – Verification scenarios – time allocation to information categories . 44
Figure C.2 – Verification scenarios – communication aspects . 45
Figure C.3 – Verification scenarios – partial operational aspects . 46
Figure C.4 – Verification scenarios – maintenance aspects . 47
Figure C.5 – Verification scenarios – operational aspects . 49
Figure C.6 – Verification scenarios – grid / electrical network aspects . 50
Figure C.7 – Verification scenarios – environmental aspects . 52

– 4 – TS 61400-26-1 © IEC:2011(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WIND TURBINES –
Part 26-1: Time-based availability for wind turbine generating systems

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 d
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