SIST-TS CLC/TS 61400-26-2:2017
(Main)Wind turbines - Part 26-2: Production-based availability for wind turbines (IEC/TS 61400-26-2:2014)
Wind turbines - Part 26-2: Production-based availability for wind turbines (IEC/TS 61400-26-2:2014)
This part of IEC 61400 provides a framework from which production-based performance
indicators of a WTGS (wind turbine generator system) can be derived. It unambiguously
describes how data is categorised and provides examples of how the data can be used to
derive performance indicators.
The approach of this part of IEC 61400 is to expand the time allocation model, introduced in
IEC TS 61400-26-1, with two additional layers for recording of the actual energy production
and potential energy production associated with the concurrent time allocation.
It is not the intention of this Technical Specification to define how production-based
availability shall be calculated. Nor is it the intention to form the basis for power curve
performance measurements, which is the objective of IEC 61400-12.
This document also includes informative annexes with:
• examples of determination of lost production,
• examples of algorithms for production-based indicators,
• examples of other performance indicators,
• examples of application scenarios.
Windenergieanlagen - Teil 26-2: Erzeugungsbasierte Verfügbarkeit von Windenergieanlagen (IEC/TS 61400-26-2:2014)
Éoliennes - Partie 26-2: Disponibilité fondée sur la production pour les éoliennes (IEC/TS 61400-26-2:2014)
Vetrne turbine - 26-2. del: Razpoložljivost, ki temelji na proizvodnji vetrnih elektrarn (IEC/TS 61400-26-2:2014)
Ta del standarda IEC 61400 zagotavlja okvir, iz katerega se lahko izpeljejo indikatorji delovanja WTGS (sistema za proizvodnjo vetrne turbine), ki temeljijo na proizvodnji. Nedvoumno opisuje, kako so podatki kategorizirani in ponuja primere, kako je mogoče uporabiti podatke za pridobivanje indikatorjev delovanja.
Pristop tega dela standarda IEC 61400 je razširiti model dodeljevanja časa, uveden v standardu IEC TS 61400-26-1, z dvema dodatnima slojema za beleženje dejanske proizvodnje energije in potencialne proizvodnje energije, ki je povezana s sočasnim dodeljevanjem časa.
Namen te tehnične specifikacije ni opredeliti, kako je treba izračunati razpoložljivost na podlagi proizvodnje. Prav tako ni njen namen, da bi bila podlaga za meritve delovanja krivulje električne energije, kar je cilj standarda IEC 61400-12.
Ta dokument vsebuje tudi informativne dodatke s:
• primeri ugotavljanja izgubljene proizvodnje,
• primeri algoritmov za indikatorje, ki temeljijo na proizvodnji,
• primeri drugih indikatorjev delovanja,
• primeri scenarijev uporabe.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST-TS CLC/TS 61400-26-2:2017
01-oktober-2017
Vetrne turbine - 26-2. del: Razpoložljivost, ki temelji na proizvodnji vetrnih
elektrarn (IEC/TS 61400-26-2:2014)
Wind turbines - Part 26-2: Production-based availability for wind turbines (IEC/TS 61400-
26-2:2014)
Windenergieanlagen - Teil 26-2: Erzeugungsbasierte Verfügbarkeit von
Windenergieanlagen (IEC/TS 61400-26-2:2014)
Éoliennes - Partie 26-2: Disponibilité fondée sur la production pour les éoliennes (IEC/TS
61400-26-2:2014)
Ta slovenski standard je istoveten z: CLC/TS 61400-26-2:2017
ICS:
27.180 Vetrne elektrarne Wind turbine energy systems
SIST-TS CLC/TS 61400-26-2:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST-TS CLC/TS 61400-26-2:2017
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SIST-TS CLC/TS 61400-26-2:2017
TECHNICAL SPECIFICATION CLC/TS 61400-26-2
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
September 2017
ICS 27.180
English Version
Wind turbines -
Part 26-2: Production-based availability
for wind turbines
(IEC/TS 61400-26-2:2014)
Éoliennes - Windenergieanlagen -
Partie 26-2: Disponibilité fondée sur la production Teil 26-2: Erzeugungsbasierte Verfügbarkeit
pour les éoliennes von Windenergieanlagen
(IEC/TS 61400-26-2:2014) (IEC/TS 61400-26-2:2014)
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 61400-26-2:2017 E
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SIST-TS CLC/TS 61400-26-2:2017
CLC/TS 61400-26-2:2017
European foreword
This document (CLC/TS 61400-26-2:2017) consists of the text of IEC/TS 61400-26-2:2014 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 61400-26-2:2014 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 61400-1:2005 NOTE Harmonized as EN 61400-1:2005 (not modified).
IEC 61400-12-1:2005 NOTE Harmonized as EN 61400-12-1:2006 (not modified).
IEC 61400-12-2:2013 NOTE Harmonized as EN 61400-12-2:2013 (not modified).
IEC 61400-25-1:2006 NOTE Harmonized as EN 61400-25-1:2007 (not modified).
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).
IEC 61400-25-5:2006 NOTE Harmonized as EN 61400-25-5:2007 (not modified).
IEC 61400-25-6:2010 NOTE Harmonized as EN 61400-25-6:2011 (not modified).
2
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SIST-TS CLC/TS 61400-26-2:2017
CLC/TS 61400-26-2:2017
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 series International Electrotechnical - -
Vocabulary
IEC/TS 61400-26-1 2011 Wind turbines - Part 26-1: Time- CLC/TS 61400-26-1 2017
based availability for wind turbine
generating systems
3
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SIST-TS CLC/TS 61400-26-2:2017
IEC TS 61400-26-2
®
Edition 1.0 2014-06
TECHNICAL
SPECIFICATION
colour
inside
Wind turbines –
Part 26-2: Production-based availability for wind turbines
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
X
ICS 27.180 ISBN 978-2-8322-1618-7
Warning! Make sure that you obtained this publication from an authorized distributor.
® Registered trademark of the International Electrotechnical Commission
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SIST-TS CLC/TS 61400-26-2:2017
– 2 – IEC TS 61400-26-2:2014 © IEC 2014
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Abbreviations . 9
3.2.1 Information available . 9
3.2.2 Information unavailable . 11
4 Information model . 12
4.1 General . 12
4.2 Allocation of production terms to the information categories . 14
4.3 Mean-value based information . 15
4.4 Limitations . 15
4.5 Entry and exit points . 15
4.6 Information category priority . 16
Annex A (informative) Possible methods for the determination of potential energy
production . 17
A.1 General . 17
A.2 Specific power curve and velocities methods . 17
A.2.1 General . 17
A.2.2 Nacelle anemometer wind measurement with power curve . 17
A.2.3 Upstream wind measurement with power curve . 18
A.2.4 Met mast wind measurement with correction factors and power curve . 18
A.3 Power-based methods . 19
A.3.1 General . 19
A.3.2 Average production of wind farm. 19
A.3.3 Average production of representative comparison turbines . 20
A.3.4 Data acquisition with comparison chart/database . 21
A.3.5 Average wind speed of wind farm . 21
Annex B (informative) Production-based availability indicators – examples . 23
B.1 General . 23
B.2 System operational production-based availability (“WTGS user’s view”) . 23
B.2.1 General . 23
B.2.2 System operational production-based availability algorithm based on
mandatory information categories only . 23
B.2.3 Turbine operational production-based availability algorithm – including
optional information categories . 24
B.3 Technical production-based availability (“WTGS manufacturer’s view”) . 25
B.3.1 General . 25
B.3.2 Technical production-based availability based on mandatory information
categories only . 25
Annex C (informative) Capacity factor and other performance indicators . 27
C.1 General . 27
C.2 Capacity factor . 27
C.3 Production ratio . 28
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IEC TS 61400-26-2:2014 © IEC 2014 – 3 –
Annex D (informative) Verification scenarios – examples . 29
D.1 General . 29
D.2 Application scenarios . 29
D.2.1 General . 29
D.2.2 Scenarios under FULL PERFORMANCE . 29
D.2.3 Scenarios under PARTIAL PERFORMANCE . 31
D.2.4 Scenarios under TECHNICAL STANDBY . 34
D.2.5 Scenarios under OUT OF ENVIRONMENTAL SPECIFICATION . 34
D.2.6 Scenarios under REQUESTED SHUTDOWN . 35
D.2.7 Scenarios under OUT OF ELECTRICAL SPECIFICATION . 37
D.2.8 Scenarios under SCHEDULED MAINTENANCE . 37
D.2.9 Scenarios under PLANNED CORRECTIVE ACTION . 38
D.2.10 Scenarios under FORCED OUTAGE . 38
D.2.11 Scenarios under SUSPENDED . 40
D.2.12 Scenarios under FORCE MAJEURE . 40
D.3 Calculation of production-based availability indicators according to Annex B . 41
D.3.1 General . 41
D.3.2 System operational production-based availability algorithm based on
mandatory information categories only (“WTGS user’s view”) . 41
D.3.3 Turbine operational production-based availability algorithm – including
optional categories (“WTGS user’s view”) . 42
D.3.4 Technical production-based availability based on mandatory information
categories only (“WTGS manufacturer's view”) . 44
Annex E (informative) Considerations of competing assignment of lost production . 46
Bibliography . 47
Figure 1 – Information category overview . 12
Figure 2 – Extended information category model. 13
Figure 3 – Information categories, addition of layer 2 and layer 3, mandatory
categories . 14
Figure A.1 – Step 1: Calculation of wind speed based on working wind turbine 1 to n . 22
Figure A.2 – Step 2: Estimation of lost production for WTGS not in FULL
PERFORMANCE . 22
Figure E.1 – Example of simultaneous degrading and derating . 46
Table D.1 – FULL PERFORMANCE: By definition, actual energy production is equal to
the potential energy production . 29
Table D.2 – FULL PERFORMANCE: Actual energy production is less than potential
energy production . 30
Table D.3 – FULL PERFORMANCE: Actual energy production greater than potential
energy production . 31
Table D.4 – Partial performance – Derated: Grid constraint . 31
Table D.5 – Partial performance – Derated: Grid constraint, actual energy production
less than potential energy production . 32
Table D.6 – Partial performance – Derated: Output constraint due to excessive noise
from the WTGS . 32
Table D.7 – Partial performance – Derated: Dirt on blades constrained performance . 33
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Table D.8 – Partial performance – Derated: Ice accumulated on blades has been
detected and the WTGS is allowed to operate although the power performance is
derated . 33
Table D.9 – Partial performance – Degraded: WTGS deterioration known to the WTGS
user . 34
Table D.10 – TECHNICAL STANDBY: WTGS is cable unwinding . 34
Table D.11 – Out of environmental specification: Calm winds . 34
Table D.12 – Out of environmental specification: High winds . 35
Table D.13 – Out of environmental specification: Temperature too high . 35
Table D.14 – REQUESTED SHUTDOWN: Ice on blades is detected and WTGS user
requests shutdown of the WTGS . 35
Table D.15 – Requested shutdown: Sector management . 36
Table D.16 – Requested shutdown: Noise nuisance . 36
Table D.17 – Out of electrical specification: Low voltage . 37
Table D.18 – SCHEDULED MAINTENANCE: WTGS is under scheduled maintenance
work by the WTGS manufacturer within the time allowance agreed by the maintenance
contract . 37
Table D.19 – PLANNED CORRECTIVE ACTION: WTGS manufacturer performs
corrective action to the WTGS at his discretion outside the time allowance of
scheduled maintenance . 38
Table D.20 – Forced outage: Short circuit . 38
Table D.21 – Forced outage: Corrosion. 39
Table D.22 – Forced outage: Overheating . 39
Table D.23 – SUSPENDED: Suspended repair work due to storm with lightning . 40
Table D.24 – FORCE MAJEURE: no access to the WTGS due to flooding impacting
infrastructure . 40
Table D.25 – System operational production-based availability algorithm based on
mandatory information categories only (“WTGS user’s view”) . 41
Table D.26 – Turbine operational production-based availability algorithm – including
optional categories (“WTGS user’s view”) . 43
Table D.27 – Technical production-based availability based on mandatory information
categories only (“WTGS manufacturer's view”) . 44
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SIST-TS CLC/TS 61400-26-2:2017
IEC TS 61400-26-2:2014 © IEC 2014 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WIND TURBINES –
Part 26-2: Production-based availability for wind turbines
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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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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.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC TS 61400-26-2, which is a technical specification, has been prepared by IEC technical
committee 88: Wind turbines.
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– 6 – IEC TS 61400-26-2:2014 © IEC 2014
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
88/455/DTS 88/483/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61400 series, under the general title Wind turbines, can be found
on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability 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
• transformed into an International standard,
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual edition of this document may be issued at a later date.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
useful for the correct
that it contains colours which are considered to be
understanding of its contents. Users should therefore print this document using a
colour printer.
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SIST-TS CLC/TS 61400-26-2:2017
IEC TS 61400-26-2:2014 © IEC 2014 – 7 –
INTRODUCTION
The intention of this technical specification is to define a common basis for exchange of
information on performance indicators between owners, utilities, lenders, operators,
manufacturers, consultants, regulatory bodies, certification bodies, insurance companies and
other stakeholders in the wind power generation business. This is achieved by providing an
information model specifying how time designations shall be split into information categories.
The information model forms the basis for how to allocate time for reporting availability and
reliability indicators.
The technical specification defines generic terms of wind turbine systems and environmental
constraints in describing system and component availability, lifetime expectancy, repairs and
criteria for determining overhaul intervals. The specification defines terminology and generic
terms for reporting energy based generating unit availability measurement. A generating unit
includes all equipment up to the point of electrical connection. Availability measurements are
concerned with fractions of time and energy a unit is capable of providing during service,
taking environmental aspects into account. Environmental aspects will be wind and other
weather conditions, as well as grid and substation conditions. The specification furthermore
defines terminology and terms for reporting performance indicators based on energy
production. Mandatory information categories defined in the technical specification are written
in capital letters; optional information categories defined in the technical specification are
written in bold letters.
The project scope is accomplished by separating the technical specification into three parts:
• IEC TS 61400-26-1, which specifies terms for time-based availability of a wind turbine
generating system;
• IEC TS 61400-26-2, which specifies terms for production-based availability of a wind
turbine generating system;
• IEC/TS 61400-26-3, which specifies terms for time-based and production-based
availability of a wind power station.
Part 2 is an extension of Part 1 that deals with the use of production elements based on the
information model defined in Part 1. The structure and interrelations in the applied information
model are defined in Part 1 and apply to the production based extensions made in Part 2.
The intention of Part 2 is to define a common basis for exchange of information on production-
based availability. This is achieved by using the information model specifying how time and
energy designations shall be split into information categories and assigned to production
terms.
NOTE The point of electrical connection is defined individually from one project to the other, but is normally
understood as the electrical low voltage or high voltage terminals of the wind turbine generating system connecting
to the feeder cables.
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WIND TURBINES –
Part 26-2: Production-based availability for wind turbines
1 Scope
This part of IEC 61400 provides a framework from which production-based performance
indicators of a WTGS (wind turbine generator system) can be derived. It unambiguously
describes how data is categorised and provides examples of how the data can be used to
derive performance indicators.
The approach of this part of IEC 61400 is to expand the time allocation model, introduced in
IEC TS 61400-26-1, with two additional layers for recording of the actual energy production
and potential energy production associated with the concurrent time allocation.
It is not the intention of this Technical Specification to define how production-based
availability shall be calculated. Nor is it the intention to form the basis for power curve
performance measurements, which is the objective of IEC 61400-12.
This document also includes informative annexes with:
• examples of determination of lost production,
• examples of algorithms for production-based indicators,
• examples of other performance indicators,
• examples of application scenarios.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60050 (all parts), International Electrotechnical Vocabulary (available at
IEC TS 61400-26-1:2011, Wind turbines – Part 26-1: Time-based availability for win
...
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