CLC/TS 61400-26-2:2017

Wind turbines - Part 26-2: Production-based availability for wind turbines

IEC TS 61400-26-2:2014 provides a framework from which production-based performance indicators of a 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. 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

Éoliennes - Partie 26-2: Disponibilité fondée sur la production pour les éoliennes

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

• Status: Withdrawn
• Publication Date: 31-Aug-2017
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: CLC/TC 88 - Wind turbines
• Drafting Committee: CLC/TC 88 - Wind turbines
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 03-Jul-2022
• Completion Date: 03-Jul-2022
• Ref Project: SIST-TS CLC/TS 61400-26-2:2017 - Wind turbines - Part 26-2: Production-based availability for wind turbines (IEC/TS 61400-26-2:2014)

Relations

• Replaced By: EN IEC 61400-26-1:2019 - Wind energy generation systems - Part 26-1: Availability for wind energy generation systems
• Effective Date: 16-Jul-2019

Standards Content (Sample)

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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

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).
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
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

– 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

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: Actua
...