BS EN 61400-25-6:2017

BSI Standards Publication

Wind energy generation systems
Part 25-6: Communications for monitoring and control of wind power
plants — Logical node classes and data classes for condition monitoring


BS EN 61400‑25‑6:2017

BRITISH STANDARD

National foreword
This British Standard is the UK implementation of EN 61400‑25‑6:2017.
It supersedes BS EN 61400‑25‑6:2011, which is withdrawn.
The UK participation in its preparation was entrusted to Technical
Committee PEL/88, Wind turbines.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions
of a contract. Users are responsible for its correct application.
© The British Standards Institution 2017
Published by BSI Standards Limited 2017
ISBN 978 0 580 94135 1
ICS 27.180

Compliance with a British Standard cannot confer immunity from
legal obligations.
This British Standard was published under the authority of the
Standards Policy and Strategy Committee on 31 May 2017.

Amendments/corrigenda issued since publication
Date

Text affected


BS EN 61400‑25‑6:2017

EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM

EN 61400-25-6
April 201 7

ICS 27.1 80

Supersedes EN 61 400-25-6:201 1

English Version

Wind energy generation systems Part 25-6: Communications for monitoring and
control of wind power plants - Logical node classes and data
classes for condition monitoring
(IEC 61 400-25-6:201 6)
Systèmes de production d'énergie éolienne Partie 25-6: Communications pour la surveillance et la
commande des centrales éoliennes - Classes de nœuds
logiques et classes de données pour la surveillance d'état
(IEC 61 400-25-6:201 6)


Windenergieanlagen Teil 25-6: Kommunikation für die Überwachung und
Steuerung von Windenergieanlagen - Klassen logischer
Knoten und Datenklassen für die Zustandsüberwachung
(IEC 61 400-25-6:201 6)

This European Standard was approved by CENELEC on 201 7-01 -20. 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, 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 1 7, B-1 000 Brussels

© 201 7 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61 400-25-6:201 7 E


BS EN 61400‑25‑6:2017
EN 61 400-25-6:201 7


European foreword
The text of document 88/606/FDIS, future edition 2 of IEC 61 400-25-6, prepared by IEC/TC 88 "Wind
energy generation systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN 61 400-25-6:201 7.
The following dates are fixed:
•

latest date by which the document has to be implemented at
national level by publication of an identical national
standard or by endorsement

(dop)

201 7-1 0-20

•

latest date by which the national standards conflicting with
the document have to be withdrawn

(dow)

2020-01 -20

This document supersedes EN 61 400-25-6:201 1 .
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such
patent rights.

Endorsement notice

The text of the International Standard IEC 61 400-25-6:201 6 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 61 400-25

2

NOTE

Harmonized in EN 61 400-25 series.


BS EN 61400‑25‑6:2017
EN 61 400-25-6:201 7

Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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.
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
IEC 61 400-25-1


Year
2006

IEC 61 400-25-2

201 5

IEC 61 400-25-3

201 5

IEC 61 400-25-4

201 6

IEC 61 400-25-5

— 1)

IEC 61 850-7-1

201 1

IEC 61 850-7-2

201 0

Title
Wind turbines - Part 25-1 :

Communications for monitoring and
control of wind power plants - Overall
description of principles and models
Wind turbines - Part 25-2:
Communications for monitoring and
control of wind power plants Information models
Wind turbines - Part 25-3:
Communications for monitoring and
control of wind power plants Information exchange models
Wind energy generation systems Part 25-4: Communications for
monitoring and control of wind power
plants - Mapping to communication
profile
Wind energy generation systems Part 25-5: Communications for
monitoring and control of wind power
plants - Conformance testing
Communication networks and systems
for power utility automation - Part 7-1 :
Basic communication structure Principles and models
Communication networks and systems
for power utility automation - Part 7-2:
Basic information and communication
structure - Abstract communication
service interface (ACSI)

EN/HD
EN 61 400-25-1

Year
2007


EN 61 400-25-2

201 5

EN 61 400-25-3

201 5

EN 61 400-25-4

201 7

EN 61 400-25-5

— 1)

EN 61 850-7-1

201 1

EN 61 850-7-2

201 0

1 ) To be published.

3



BS EN 61400‑25‑6:2017
EN 61 400-25-6:201 7
Publication
IEC 61 850-7-3

Year
201 0

ISO 1 3373-1

2002

4

Title
Communication networks and systems
for power utility automation - Part 7-3:
Basic communication structure Common data classes
Condition monitoring and diagnostics of
machines - Vibration condition
monitoring - Part 1 : General procedures

EN/HD
EN 61 850-7-3

Year
201 1

-


-


BS EN 61400‑25‑6:2017
–2–

I EC 61 400-25-6: 201 6

 I EC 201 6

CONTENTS
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
I N TRODU CTI ON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
1
Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2
3

N orm ative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0
Term s and d efin iti ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 0

4
5

Abbrevi ated term s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4

5. 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4
5. 2

Con di tion m on itorin g i nform ati on m od el li ng . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4
5. 3
Coordi n ate system applied for id entifyi n g d irecti on an d an gl es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
5. 4
Operation al state bin con cept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
5. 4. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
5. 4. 2
Exam pl e of h ow to use active power as an operati on al state. . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
6
Logical nod es for wi n d tu rbin e con di tion m on itorin g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
6. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
6. 2
Logical nod es i nh erited from I EC 61 400-25-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
6. 3
Wind turbi n e cond i tion m on i torin g log ical n od e WCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
6. 3. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 7
6. 3. 2
CDCs appl icable for th e l ogical n od e WCON . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
7
Com m on d ata cl asses for wi nd turbin e cond i tion m on itori n g . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
7. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
7. 2
Com m on d ata cl asses d efin ed in I EC 61 400-25-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
7. 3
Con di tions for d ata attribute i nclusi on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
7. 4

Com m on d ata cl ass attri bu te nam e sem an tic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9
7. 5
Con di tion m on itorin g bi n (CM B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7. 6
Con di tion m on itorin g m easurem en t (CMM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7. 7
Scal ar valu e array (SVA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7. 8
Com pl ex m easu rem en t valu e array (CM VA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8
Com m on d ata cl ass CM M attri bu te defin i ti ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8. 2
Attri bu tes for con di ti on mon itori n g m easurem ent d escription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8. 2. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8. 2. 2
Con dition m on itorin g sen sor (trd) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8. 2. 3
Shaft id entificati on (shfI d ) an d beari ng positi on (brg Pos) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
8. 2. 4
Measurem ent type (m xType) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Ann ex A (inform ati ve) Recom m end ed m xType val ues . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 1
General abou t tag n am es an d datan am es of the WCON Cl ass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 2
Mappin g of m easurem ent tags to m xTypes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 2. 1
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

A. 2. 2
Scalar val u es (M V)(Descri ptors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 2. 3
Array m easurem ents (SVA) – Freq u ency d om ain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 2. 4
Array m easurem ents (SVA) – Tim e d om ain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
A. 3
m xType val u es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Ann ex B (inform ati ve) Applicati on of d ata attri butes for con d iti on m on itorin g
m easurem ent d escri ption for m easurem ent tag n am ing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37


BS EN 61400‑25‑6:2017
I EC 61 400-25-6: 201 6

 I EC 201 6

–3–

B. 1
B. 2
B. 3
Ann ex C

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
N am in g pri nciple usi ng th e d ata attribu tes in CM M CDC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Exam pl es . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
(i nform ati ve) Con d iti on m on i torin g bins exam ples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

C. 1

C. 2
C. 3
Ann ex D

Exam pl e 1 : One d im ensi on al bi ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Exam pl e 2: Two d im ension al bins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Exam pl e 3: Two d im ension al bins wi th overl ap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
(i nform ati ve) Appl icati on exam ple . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

D. 1
Overview of CDCs essen ti al to I EC 61 400-25-6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
D. 2
H ow to appl y d ata to CDCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
D. 3
H ow to appl y an alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Bibli ograph y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Fi gu re 1 – Con dition m on itori ng wi th separated TCD/CM D fu ncti ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Fi gu re 2 – Schem atic fl ow of con d iti on m on itoring i nform ati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Fi gu re 3 – Reference coord in ates system for th e d rive train . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
Fi gu re 4 – Acti ve power bin concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6
Fi gu re 5 – Sensor an gu l ar ori entati on as seen from the rotor en d . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fi gu re 6 – Sensor m oti on id en tificati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fi gu re 7 – Sensor n orm al an d reverse m otion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Fi gu re 8 – Pri nciple of sh aft and bearin g i d en tificati on al ong a dri ve trai n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Fi gu re B. 1 – N am in g prin ci pl es for trd data attribu te . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Fi gu re C. 1 – Bi n configurati on exam ple 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Fi gu re C. 2 – Bi n config urati on exam ple 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Fi gu re C. 3 – Bi n configuration exam ple 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Fi gu re D. 1 – Linkage of the CDCs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 1 – Abbreviated term s appl ied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3

Table 2 – Coordin ate system and wi n d turbi ne rel ated ch aracteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5
Table 3 – LN : Wind turbine con d iti on m on itori ng i nform ation (WCON ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8
Table 4 – Con di tions for the presence of a d ata attri bu te . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 9
Table 5 – Com m on d ata cl ass attribute n am e seman tic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 6 – CDC: Con d ition m on i tori n g bin (CM B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Table 7 – CDC: Con d ition m on i torin g m easurem ent (CM M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 8 – CDC: Scalar valu e array (SVA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 9 – CDC: Com plex m easurem en t valu e array (CM VA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 1 0 – Data attri bu tes used for m easurem en t descri pti on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 1 1 – Sensor i den tificati on con ven tion for “trd” attri bu te . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table 1 2 – Abbreviated term s for “trd” – “locati on” d escription . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 1 3 – Sensor type cod e . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Table 1 4 – Reference code for sensor sensiti ve axis ori en tati on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 1 5 – Gearbox shaft an d beari ng id entification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Table A. 1 – Exam ples of appl icabl e m appin gs from tag to MxType . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Table B. 1 – Exam ples of Tag nam es and correspond i n g short d atanam es . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38


BS EN 61400‑25‑6:2017
–4–

I EC 61 400-25-6: 201 6

 I EC 201 6

Tabl e C. 1 – CM B exam ple 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table C. 2 – CM B d ata obj ect exam pl e 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Table C. 3 – CM B exam pl e 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table C. 4 – CM B d ata obj ect exam pl e 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table C. 5 – CM B exam pl e 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Table C. 6 – CM B d ata obj ect exam pl e 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Table D. 1 – Obj ect overvi ew . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table D. 2 – N am e plate (LPL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table D. 3 – CDC exam ple: Cond i ti on m on itori n g m easurem ent (CM M) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table D. 4 – CDC exam ple: Cond i ti on m on itori n g bi n (CM B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Table D. 5 – CDC exam ple: Al arm d efi n iti on (ALM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table D. 6 – LN exam pl e: Al arm contain er d efi n ition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48


BS EN 61400‑25‑6:2017
I EC 61 400-25-6: 201 6

 I EC 201 6

–5–

I NTERNATI ON AL ELECTROTECH NI CAL COM MI SSI ON
____________

WIND ENERGY GENERATION SYSTEMS –
Part 25-6: Communications for monitoring and control of wind power
plants – Logical node classes and data classes for condition monitoring
FOREWORD
1 ) The I ntern ati on al El ectrotech ni cal Com m i ssi on (I EC) i s a worl d wi d e organi zati on for stand ardi zati on com pri si n g
al l nati on al el ectrotechn i cal com m i ttees (I EC N ati on al Comm i ttees). The obj ect of I EC i s to prom ote
i ntern ati onal co-operati on on al l q u esti ons con cerni ng stan dardi zati on i n th e el ectri cal and el ectroni c fi el ds. To
th i s en d an d i n ad d i ti on to other acti vi ti es, I EC pu bl i sh es I ntern ati onal Stan dard s, Techn i cal Speci fi cati on s,
Techn i cal Reports, Publ i cl y Avai l abl e Speci fi cati ons (PAS) an d Gui des (hereafter referred to as “I EC
Pu bl i cati on(s)”). Th ei r preparati on i s entrusted to techn i cal com m i ttees; any I EC N ati on al Com m i ttee i nterested
i n the subj ect deal t wi th m ay parti ci pate i n th i s preparatory work. I ntern ati onal , governm ental an d n on governm en tal org an i zati on s l i ai si n g wi th th e I EC al so parti ci pate i n thi s preparati on . I EC col l aborates cl osel y

wi th th e I ntern ati on al Organi zati on for Stan d ard i zati on (I SO) i n accord an ce wi th con di ti ons d eterm i ned by
agreem ent between th e two organi zati ons.
2) The form al deci si on s or ag reem ents of I EC on tech ni cal m atters express, as nearl y as possi bl e, an i nternati on al
consensus of opi n i on on the rel evan t subj ects si nce each tech ni cal com m i ttee h as represen tati on from al l
i nterested I EC N ati on al Com m ittees.
3) I EC Publ i cati on s have the form of recom m en dati ons for i n tern ati onal use an d are accepted by I EC N ati onal
Com m i ttees i n that sen se. Whi l e al l reason abl e efforts are m ade to ensu re th at th e tech n i cal content of I EC
Pu bl i cati ons i s accu rate, I EC cann ot be hel d responsi bl e for th e way i n wh i ch th ey are u sed or for an y
m i si n terpretati on by an y en d u ser.
4) I n ord er to prom ote i ntern ati on al u n i form i ty, I EC N ati on al Com m i ttees u nd ertake to appl y I EC Publ i cati on s
tran sparen tl y to th e m axi m u m exten t possi bl e i n thei r n ati onal an d regi on al pu bl i cati on s. An y d i vergen ce
between an y I EC Publ i cati on and th e correspon di ng n ati onal or regi on al pu bl i cati on shal l be cl earl y i n di cated i n
th e l atter.
5) I EC i tsel f d oes n ot provi d e an y attestati on of con form i ty. I n depen d en t certi fi cati on bod i es provi d e con form i ty
assessm en t servi ces an d , i n som e areas, access to I EC m arks of conform i ty. I EC i s not responsi bl e for an y
servi ces carri ed out by i nd epend ent certi fi cati on bod i es.
6) Al l users shou l d ensure that th ey h ave th e l atest edi ti on of thi s pu bl i cati on.
7) N o l i abi l i ty sh al l attach to I EC or i ts di rectors, em pl oyees, servants or ag en ts i ncl u d i ng i n d i vi d u al experts an d
m em bers of i ts tech ni cal com m i ttees and I EC N ati on al Com m i ttees for an y person al i nj u ry, property d am ag e or
oth er dam age of an y nature wh atsoever, wheth er di rect or i n di rect, or for costs (i ncl ud i n g l eg al fees) an d
expen ses ari si n g ou t of th e publ i cati on , u se of, or rel i an ce upon, th i s I EC Pu bl i cati on or an y oth er I EC
Publ i cati on s.
8) Atten ti on i s drawn to the N orm ati ve referen ces ci ted i n th i s pu bl i cati on. U se of th e referen ced pu bl i cati ons i s
i n di spen sabl e for the correct appl i cati on of th i s publ i cati on .
9) Atten ti on i s d rawn to th e possi bi l i ty th at som e of th e el em en ts of th i s I EC Publ i cati on m ay be the su bj ect of
patent ri g hts. I EC shal l n ot be hel d responsi bl e for i d enti fyi ng an y or al l such paten t ri gh ts.

I n tern ati on al Stan dard I EC 61 400-25-6 h as been prepared by I EC tech n ical comm ittee 88:
Wind en erg y gen erati on system s.
This secon d ed ition can cels an d repl aces the fi rst ed iti on pu blish ed i n 201 0. Th is ed i tion

constitutes a techn ical revision .
This ed i ti on incl u des th e foll owi ng si gnifican t techn ical ch an ges wi th respect to the previous
ed i tion:
a)
b)
c)
d)

Maj or restructurin g of th e d atam od el to accom m odate n eed ed fl exibi li ty.
U FF58 form at is no lon ger used.
Access to d ata is now using th e stan d ard reporti n g an d loggin g functions.
Recom m end ations for creatin g datan am es to accomm odate n eed ed flexi bi l ity have been
defin ed.


BS EN 61400‑25‑6:2017
–6–

I EC 61 400-25-6: 201 6

 I EC 201 6

The text of th is stan d ard is based on the fol lowi n g docum en ts:
FDI S

Report on voti n g

88/606/FDI S

88/61 1 /RVD


Fu l l i nform ati on on th e voti ng for the approval of th is I n tern ati on al Stand ard can be fou n d i n
th e report on votin g i nd icated in th e above table.
This d ocum en t h as been drafted in accord ance wi th th e I SO/I EC Directi ves, Part 2.
As the ti tl e of tech n ical com m ittee 88 was changed i n 201 5 from Wind turbines to Wind
energy generation systems a l ist of al l parts of the I EC 61 400 seri es, u n der th e gen eral titl e
Wind turbines and Wind energy generation systems can be foun d on the I EC website.
The com m ittee has d ecid ed that th e con tents of th is docum en t wi ll rem ain u nch anged u n ti l th e
stabi li ty d ate ind icated on th e I EC websi te un d er "http: //webstore. i ec. ch " i n th e d ata related to
th e specific d ocum ent. At th is date, the docum ent wi ll be

•
•
•
•

reconfi rm ed,
wi thdrawn ,
repl aced by a revised ed i ti on, or
am end ed.

A bi l in g ual versi on of th is pu bl icati on m ay be issu ed at a l ater d ate.

I M P O R T AN T – T h e ' c o l o u r i n s i d e '
th at

it

con tai n s


u n d e rs t a n d i n g
c o l o u r p ri n t e r.

of

c o l o u rs
i ts

wh i ch

c o n te n ts .

l og o
a re

U s e rs

on

th e co ve r p ag e o f th i s

c o n s i d e re d
sh ou l d

to

t h e re fo re

be


p u b l i cati o n

u s e fu l

p ri n t

th i s

fo r

i n d i c ate s

th e

d o cu m en t

c o rre c t
u sin g

a


BS EN 61400‑25‑6:2017
I EC 61 400-25-6: 201 6

 I EC 201 6

–7–

I NTRODUCTI ON

The I EC 61 400-25 seri es defi n es i nform ati on mod els an d i nform ati on exchan ge m od els for
m onitori ng and control of win d power plants. The m odell in g approach (for i nform ation m od els
an d inform ati on exch an ge m od els) of I EC 61 400-25-2 and I EC 61 400-25-3 uses abstract
defin i tions of cl asses an d services such th at th e specificati ons are i n depen d en t of specific
comm unicati on protocol stacks, im plem entations, an d operatin g system s. The m appin g of
th ese abstract d efi n iti ons to specific comm un ication profi les is d efi ned i n I EC 61 400-25-4 1 .
This d ocum ent d efi n es an inform ati on m odel for con d ition m on itorin g i nform ation and explai ns
how to use th e existin g defin itions of I EC 61 400-25-2 as well as th e req u ired extensions in
ord er to d escribe and exchan ge inform ati on related to cond i tion m oni torin g of wi nd turbin es.
The m odels of con di ti on m on itorin g i nform ation d efin ed i n th is d ocu m ent m ay represent
i nform ation provid ed by sensors or by calcu l ation.
I n th e context of th is d ocum ent, cond i tion m on itorin g m eans a process with th e purpose of
observing com pon ents or structures of a wi nd turbi ne or wi nd power plant for a peri od of tim e
i n order to evaluate th e state of th e com ponen ts or structures and an y ch an ges to it, i n ord er
to detect earl y in d icati ons of im pen d in g fai lures. With th e obj ective to be abl e to m onitor
com pon ents an d structures record ed u n d er approxim atel y the sam e con d iti ons, th is d ocum en t
introd uces th e operational state bin concept. The operational state bi n concept is
m ultid im ensi on al in order to fi t th e purpose of sorti ng com pl ex operati onal con d iti ons in to
com parable circum stances.
Con di tion m on i torin g is m ost freq uen tl y used as a pred icti ve or con d iti on -based m ai ntenance
tech niq ue (CBM). H owever, th ere are oth er pred icti ve m ain ten ance techn iqu es that can also
be used, i nclu d i ng the use of th e hum an senses (l ook, listen , feel , sm ell) or m achi n e
perform ance m oni tori n g tech ni q ues. These cou ld be consid ered to be part of th e cond ition
m onitoring.
C on d i ti on m on i to ri n g te ch n i q u es

Con di tion m on itori ng techn i q ues th at gen erate inform ation to be m od el l ed i nclu de, bu t are n ot
l im ited to, m easured or processed val ues such as:
a)
b)

c)
d)
e)

vibration m easurem en ts an d an al ysis;
oil debris m easurem en t and an al ysis;
tem perature m easurem ent an d anal ysis;
strain g au ge m easurem ent an d anal ysis;
acoustic m easurem ent and an al ysis.

Com pon en ts an d structu res can be m on itored by usi n g autom atic m easurem ent retrieval or
vi a a m an u al process.
C on d i ti on m on i to ri n g d evi ce s

The cond i tion m on itorin g functions m ay be located i n d ifferen t ph ysical d evices. Som e
i nform ation m ay be exposed by a turbi n e con troll er device (TCD) wh i le other inform ati on m ay
be exposed by an add ition al cond i tion m on i torin g device (CMD). Various actors m ay req uest
to exch an g e d ata val ues l ocated i n the TCD an d/or CMD. A SCADA device m ay req uest d ata
valu es from a TCD an d/or CM D; a CM D m ay req u est data val ues from a TCD. The inform ati on
exch ang e between an actor an d a device in a wi nd power plan t requ ires th e use of
i nform ation exch an ge services as d efi n ed i n I EC 61 400-25-3. A sum m ary of the above is
shown in Fi g ure 1 .
—————————
1 To be pu bl i shed.


BS EN 61400‑25‑6:2017
–8–

I EC 61 400-25-6: 201 6


 I EC 201 6

Actors like operators, control centre,
maintenance teams, owners, ...
IEC 61 400-25-3, IEC 61 400-25-4
and IEC 61 400-25-6
Information exchange

IEC 61 400-25-3, IEC 61 400-25-4
Information exchange

Wind turbine control device or function with
logical nodes and data objects

Information
exchange

Scope of
document

Condition monitoring device or function
with logical nodes and data objects

Gearbox
Generator
Brake
Tower
TC/CM


...

Actors like operators,
control centre, maintenance
teams, owners, ...

IEC 61 400-25-3, IEC 61 400-25-4
and IEC 61 400-25-6
Information exchange

...

…
Logical nodes and data objects
IEC

Figure 1 – Condition monitoring with separated TCD/CMD functions
The state of th e art in th e wi nd power i n d ustry is a topol og y with separated devices for control
an d con d ition m on itorin g applicati ons. Based on th is fact, th e inform ation and i nform ati on
exch ange m odel l ing in th e present docum en t is based on a topol og y wi th a TCD an d a CMD.
I EC 61 400-25-6 represents an extensi on of the I EC 61 400-25 series focussin g on con d iti on
m onitori ng .


BS EN 61400‑25‑6:2017
I EC 61 400-25-6: 201 6

 I EC 201 6

–9–


WIND ENERGY GENERATION SYSTEMS –
Part 25-6: Communications for monitoring and control of wind power
plants – Logical node classes and data classes for condition monitoring
1 Scope
This part of I EC 61 400-25 specifi es th e inform ation m odels rel ated to cond iti on m oni tori n g for
wi n d power plan ts and th e i nform ation exch an ge of data valu es rel ated to these m odels.
N OTE Con form an ce to I EC 61 400-25-6 presupposes i n pri n ci pl e con form an ce to I EC 61 400-25-2, I EC 61 400-25-3
an d I EC 61 400-25-4.

Data acquisition
Local alarming
(Long term trending)

Alarm management
Diagnosis
reporting
Data

Condition
monitoring
supervision

Data reduction

(Long term trending)
Alarming
Long term data storage

Data


Central condition
monitoring

Refinement of information

Data

Local condition
monitoring

Scope of IEC 61 400-25-6

Fi gu re 2 il l ustrates the i nform ation flow of a system usin g con di tion m on itorin g to perform
con d iti on based m ain tenance. Th e fi gure il l ustrates h ow d ata valu es are refin ed an d
concentrated throu gh th e inform ation flow, en d in g up wi th th e u l tim ate goal of con d iti on based
m ainten ance; actions to be perform ed vi a issu in g work ord ers to m ain ten ance team s i n ord er
to preven t the wi n d power pl an t d evice to stop provi di n g i ts i nten d ed service.

Service
management

Work
orders

Service staff

Figure 2 – Schematic flow of condition monitoring information

IEC



BS EN 61400‑25‑6:2017
– 10 –

2

I EC 61 400-25-6: 201 6

 I EC 201 6

Normative references

The fol lowi n g d ocum en ts are referred to in th e text in such a way that som e or al l of th eir
con ten t constitutes requ irem ents of th is docum ent. For dated references, on l y th e edi tion
cited appli es. For un d ated references, th e l atest ed iti on of th e referenced d ocum en t (i nclud ing
an y am endm en ts) appl ies.
I EC 61 400-25-1 : 2006, Wind turbines – Part 25-1: Communications for monitoring and control
of wind power plants – Overall description of principles and models
I EC 61 400-25-2: 201 5, Wind turbines – Part 25-2: Communications for monitoring and control
of wind power plants – Information models
I EC 61 400-25-3: 201 5, Wind turbines – Part 25-3: Communications for monitoring and control
of wind power plants – Information exchange models
I EC 61 400-25-4: 201 6, Wind energy generation systems – Part 25-4: Communications for
monitoring and control of wind power plants – Mapping to communication profile
I EC 61 400-25-5: — 2 , Wind energy generation systems – Part 25-5: Communications for
monitoring and control of wind power plants – Conformance testing
I EC 61 850-7-1 : 201 1 , Communication networks and systems for power utility automation –
Part 7-1: Basic communication structure – Principles and models
I EC 61 850-7-2: 201 0, Communication networks and systems for power utility automation –

Part 7-2: Basic information and communication structure – Abstract communication service
interface (ACSI)
I EC 61 850-7-3: 201 0 Communication networks and systems for power utility automation –
Part 7-3: Basic communication structure – Common data classes
I SO 1 3373-1 : 2002, Condition monitoring and diagnostics of machines – Vibration condition
monitoring – Part 1: General procedures

3 Terms and definitions
For th e purposes of th is d ocum en t, the term s and d efi n iti ons gi ven i n I EC 61 400-25-1 ,
I EC 61 400-25-2, I EC 61 400-25-3, I EC 61 400-25-4 an d I EC 61 400-25-5 appl y.
An exh austi ve d escription of th e term " bin " has been gi ven in 5. 4.
I SO an d I EC m ain tai n term in ological databases for use i n stan dard i zati on at the fol lowi n g
ad dresses:

•
•

I EC Electroped i a: avai labl e at h ttp: //www. el ectroped ia. org /
I SO On l in e browsi n g platform : avail able at http: //www. iso. org/obp

3.1
actor

an y en tity that recei ves (sen ds) d ata val u es from (to) an oth er d evice
N ote 1 to en try:

E xam pl es of actors coul d be SCADA system s, m ai nten ance system s, own er, etc.

—————————
2 To be pu bl i sh ed .



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 I EC 201 6

– 11 –

3.2
mandatory
M

specific con ten t provid ed to ensure com pli ance wi th th is d ocum en t

3.3
optional
O

specific con ten t th at can be provi d ed to ensure com pli an ce wi th th is d ocum en t

3.4
conditional
C

depen d ing on stated cond i tions, specific conten t d efi ned to ensure com pli an ce with this
docum en t

3.5
frequency analysis


raw tim e waveform s recorded by th e sensor are post processed to m easurem ent types i n the
freq uency d om ai n
N ote 1 to en try:

The m ost com m on m easurem en t type i s th e auto spectru m (AU S).

3.6
scalar value

data type representi n g a q uanti ty wh ich can be d escribed by a si n gle num ber, such as a
tem perature
N ote 1 to entry: A scal ar val u e i s a post processi n g of the raw vi brati on si g nal i n to on e or m ore scal ar val u es,
al so cal l ed d escri ptors (see I SO 1 3379-1 : 201 2). Each d escri ptor (scal ar) val u e i s used to i n di cate th e presen ce of
a certai n fai l u re m ode of a m on i tored m ach i ne part. E. g. one descri ptor can i nd i cate i f a beari n g fau l t i s present by
m easu ri ng the vi brati on l evel at th e ou ter ri ng of a certai n beari n g, an oth er can i n d i cate th e vi brati on l evel of th e
sh aft ru n ni n g speed an d can i n d i cate m i sal i gnm en t, u n bal an ce or oth er sh aft rel ated fau l ts.

3.7
time waveform

sam pl ed vibrati on sig nal record ed from the transd ucer
N ote 1 to en try: Ti m e waveform record i ngs h ave a certai n l ength i n ti m e an d represen t th e actu al vi brati on l evel
at an y i n stan ce du ri n g th e record i n g of th e waveform .

3.8
root mean square value
RMS

m easure of th e l evel of a sig nal calcu l ated by sq u arin g the instan tan eous valu e of th e si gnal ,

averag in g the squ ared values over tim e, and taki n g th e sq u are root of th e averag e val ue
N ote 1 to en try:

The RM S val u e i s th e val ue wh i ch i s u sed to cal cu l ate the en erg y or power i n a si g n al .


BS EN 61400‑25‑6:2017
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I EC 61 400-25-6: 201 6

 I EC 201 6

4 Abbreviated terms
CDC
CM
CM D

Com m on d ata cl ass
Con dition m on itorin g (fun ction)
Con dition m on itorin g d evice

DC
ING
LD
LN
LPH D
RCB
RM S
SAV

SH S
SM V
TC
TCD
TMF
TOC

Data class
Com m on d ata cl ass for integer setti n g valu e (see I EC 61 850-7-3)
Logical device
Logical nod e
Logical nod e ph ysical d evice inform ation
Report control bl ock
Root m ean sq uare
Com m on d ata cl ass for sam pl ed an alog ue valu es (see I EC 61 850-7-3)
Statistical an d h istorical statistical d ata (as defin ed i n I EC 61 400-25-2: 201 5,
Ann ex A)
Sam pl ed m easured values; som etim es sh ort: SV = sam pl ed val ues
Turbin e control ler (fu ncti on)
Turbin e control ler device
Tooth m esh i n g freq uency
Turbin e operation cond i tions

WPP
WT

Wind power pl ant
Wind turbin e

Abbrevi ated term s used to bu i ld nam es of d ata classes fou n d i n LN s shall be as listed in

Table 1 below an d i n th e table of abbrevi ated term s in I EC 61 400-25-2: 201 5, Cl ause 4.


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 I EC 201 6

– 13 –

Table 1 – Abbreviated terms applied
Term

Description

Term

Description

Acc

Accu racy; Accel erati on

Pc

Power cl ass

An

Anal ogu e


Per

Peri od , peri odi c

An e

Anem om eter

PF

Power factor

An g

Angl e

Ph

Ph ase

Av

Averag e

Pl u

Pol l uti on

Ax


Axi al

Pos

Posi ti on

Azi

Azi m uth

Prcd

Processed

Bec

Beacon

Pres

Pressu re

Bn

Bi n (e. g. Power Bi n )

Prod

Prod u cti on


Cab

Cabl e

Pwr

Power

Ccw

Cou n ter cl ockwi se

Ra

Radi al

Cw

Cl ockwi se

React

Reacti ve

Dcl

Dc-l i n k

RMS


Root-m ean -sq uare

Deb

Debri s

Roof

Roof

Dec

Decrease

Sb

Si d eband

Di r

Di recti on

Sdv

Stan dard d evi ati on

Dsp

Di spl acem ent


Sm ok

Sm oke

Dtc

Detecti on

Snd

Soun d pressure

Em g

Em ergen cy

Spd

Speed

En

Energy

Stl d

Stru ctural l oad

En t


Entrance

Stn

Strai n

Ety

Em pty

Stop

Stop

Ext

Exci tati on

Str

Start

Fl sh

Fl ash

Sw

Swi tch


Gri

Gri d

Swf

Swarf

Gs

Grease

Tm p

Tem peratu re

H arm

H arm on i c

Torq

Torq ue

Hi

H i gh

Trd


Tran sd ucer

H or

H ori zon tal

Trg

Tri g ger

Hum

H um i di ty

Trs

Tran si ent

Hz

Freq u ency

V

Vol tage

I ce

I ce


Vbr

Vi brati on

Idl

I dl i n g

Ver

Verti cal

Inl

I nl i n e

Wd p

Wi n d power

Lev

Level

Wu p

Wi n du p

Lft


Li ft

Xd i r

X-di recti on

Lo

Low (state or val u e)

Ydi r

Y-di recti on

Lu m

Lum i n osi ty

Max

M axi m um

Met

M eteorol ogi cal

Mi n

M i n i m um


Mu l t

M ul ti pl i er


BS EN 61400‑25‑6:2017
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I EC 61 400-25-6: 201 6

 I EC 201 6

5 General
5.1

Overview

The prim ary obj ecti ve of con d iti on m onitorin g is to detect sym ptom s of a potenti al fail ure of a
wi n d tu rbine com pon ent before i t l eads to functi on al fai l ure resu lting in serious d am age or
destruction of the win d tu rbin e.
I n con d iti on m oni tori n g system s, pred efi n ed triggers are appl ied to i n iti ate a sequ ence of
even ts, for exam pl e issu ing an alarm to th e l ocal SCADA system or sen d i ng a m essage to a
m onitori ng centre in order to prevent fu rther d am age on com pon en ts or structures. I n gen eral ,
such m essages can be used by a con d ition m onitori ng supervision function to g en erate
action able i nform ation wh ich can be used by a service organ i zati on to create work ord ers and
ini tiate actions. Fig ure 2 i l lustrates th e inform ati on flow of a system us in g con d iti on m on itori ng
to perform con d iti on based m aintenance.
Con di tion m on itorin g is m ain l y associated with th e fol l owing kin ds of i nform ation .
a) Tim e waveform records (sam ples) of a specifi c tim e i nterval to be exchan ged ei th er

d irectl y or as processed valu es for anal ysis (e. g. acceleration , posi ti on detection, speed ,
stress d etection).
b) Status i nform ation an d m easurem en ts (syn ch ron i zed with th e waveform records)
representi ng th e turbi ne operation con d iti ons.
c) Resu lts of tim e waveform record anal ysis of vibration d ata (scalar val u es, array values,
statistical val u es, h istorical (statistical) valu es, coun ters an d status i nform ati on).
d) Resu lts of, for exam ple, oil debris anal ysis.
The con d iti on m on itorin g inform ati on can be d escri bed by specified d ata attributes, tri gger
options an d data obj ects of th e foll owi ng com m on data cl asses:

•
•
•
•
•
•
•

con d iti on m on itori n g m easurem ent (CM M);
m easurem ent valu e (M V);
scalar val u e array (SVA);
com plex m easurem ent valu e (CM V);
com plex m easurem ent valu e array (CM VA);
con d ition m on i tori n g bin (CM B);
alarm (ALM).

The purpose of th is d ocum ent is to m od el con d iti on m on itori ng inform ati on by usin g th e
inform ation m od ell in g approach as d escri bed i n 6. 2. 2 of I EC 61 400-25-1 : 2006 an d b y
extend i ng the i nform ati on m od el as specified i n Clause 5 of I EC 61 400-25-2: 201 5 with an
ad d iti onal log ical n od e WCON for m odel l ing inform ation specific to con d iti on m on itoring of

wi n d power plan ts.
As th e WCON class is mod el led usin g th e approach of I EC 61 400-25-1 an d I EC 61 400-25-2,
th e i nform ation exchan ge m odels as specifi ed in I EC 61 400-25-3 and the m appi n g to
com m unication profil es as specified in I EC 61 400-25-4 can be used for exchan gin g con d ition
m onitori ng inform ation.

5.2

Condition monitoring information modelling

When applicabl e, th e bi nd in g of a specific con d iti on m on itori n g i nform ation to a specific
sensor an d a specific l ocati on in a wi n d tu rbi ne sh all be specified usin g :
a) a d efinition of th e coord in ate system appl ied for specifyi n g d irecti on and an g les; see 5. 3;


BS EN 61400‑25‑6:2017
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 I EC 201 6

– 15 –

b) data attribu tes for id entifyi n g th e en vironm ent for a con d iti on m on i tori n g m easurem ent –
operati onal state bi n con cept, see 5. 4;
c) data attri butes for i d entifyi n g a cond ition m on itori ng m easurem en t by sensor type, an gu l ar
orientati on, d irecti on of m otion , an d ph ysical l ocation in a wind turbi n e such as sh aft
num ber, bearing posi tion as well as id entificati on of th e prim ary m easurem en t obj ect for a
sensor. For furth er d etai l s, see Clause 8.
The sensor an d l ocation specifications i n th is d ocum ent are in princi ple coord in ated wi th th e
specifications d efi ned in I SO 1 3373-1 , wh ere coord in ati on has been appl icabl e.


5.3

Coordinate system applied for identifying direction and angles

I n ord er to be able to u n am bi gu ousl y id entify a sensor l ocation , a coordi n ation system is used
as a reference to specify al l d irecti ons an d angl es. Figure 3 sh ows an X, Y, Z coord in ate
system superim posed on th e wi n d turbi n e d ri ve train . The dri ve train is seen i n th e d irection of
th e win d . I t is defin ed th at th e Z d irection is al ways the sam e as the wi n d d i recti on .
Y

Main bearing

Gearbox

Generator

Z

X

IEC

Figure 3 – Reference coordinates system for the drive train
Tabl e 2 l ists oth er common l y used d esig n ati ons as related to th e reference coord in ate system
defin ed i n th is d ocum ent.

Table 2 – Coordinate system and wind turbine related characteristics
Used in this document
Z d i recti on


Other designations
Down wi nd (as opposed to U pwi n d )
Axi al (wi n d di recti on)

X d i recti on

Lateral
Transverse
H ori zontal
Ri ght (as opposed to Left)

Y di recti on

Verti cal
U p (as opposed to Down )


BS EN 61400‑25‑6:2017
– 16 –

5.4

I EC 61 400-25-6: 201 6

 I EC 201 6

Operational state bin concept

5.4.1


General

I n ord er to descri be the en vironm ent for a set of con d iti on m oni tori n g m easurem ents, the
operati onal state bi n con cept h as been d evel oped . A wi n d turbin e operates in princi ple over a
wid e ran ge of win d speeds causin g a large vari ety of loads on th e m echan ical structures. An
ad aptive m on itoring tech n iq u e is often appl ied to secure a h i gh er d egree of rel iabi lity an d
repeatabil i ty of m easurem ents used to d etect d evelopi n g fau lts in the fu ll operatin g ran ge,
th us red uci ng the risk of triggerin g false alarm s. I n ord er to ad apt to th e varyi n g operating
con d itions, d ata can be stored accord in g to several operational states in m ultipl e d im ensi ons.
The basic principle of con d ition m on itorin g is to observe th e evol uti on of specific m easured
variabl es by com parin g n ew m easurem en ts wi th previ ous m easurem ents. Th e effect of
chan ges i n operati on al con d iti ons can be l im ited by com pari n g inform ation bel on gin g on l y to
th e sam e operation al state bin .

5.4.2

Example of how to use active power as an operational state

Acti ve power l evels are u sed for th e ad aptive m onitori ng tech n iq u e rath er th an th e wi n d speed
as th e vibration l evel m easured an d th e stress on th e turbin e com ponents are fou nd to be
cl osel y related to the active power prod uction of the turbi n e. B y usin g th e acti ve power l evel
as m easurem ent trigger, it is also ensured th at vibration m easurem ents are record ed on l y
wh en a wi n d turbi n e is prod ucing active power.

m/s 2

An exam ple of vi brati on data from the generator Dri ve End (DE) wh i ch are in d i vi du al l y
com pared to trigg er lim its for five different “active power bins” with in d i vidu al al arm trig ger
levels is given i n Fi gure 4.

Generator DE vi brati on
Bi n 5

0, 1
Bi n 4

0, 05

Bi n 3
MW

0

1 ,5
1 ,2
0, 9
0, 6
0, 3
0

Generator power
Bi n
Bi n
Bi n
Bi n
Bi n

t

Bi n 2


5
4
3
2
1

Bi n 1
t

IEC

Figure 4 – Active power bin concept

6
6.1

Logical nodes for wind turbine condition monitoring
General

I nform ati on col lected wi th th e purpose of m on itori ng the con d iti ons of a wind turbi n e can al l
be related to particu lar parts of a wi nd turbin e, with th e obj ecti ve of havi ng a com pl ete picture
of th e operation al cond i ti ons i n a wi n d turbi n e. The l ogical n ode WCON shall on l y com prise


BS EN 61400‑25‑6:2017
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 I EC 201 6


– 17 –

req u ired data for cond i ti on m on i tori n g system s that h as not alread y been specified in
I EC 61 400-25-2.

6.2 Logical nodes inherited from IEC 61 400-25-2
WCON access to th e log ical n odes wh ich are specifi ed i n I EC 61 400-25-2 are m and atory as
th ese l ogical n od es i nclud e relevan t m easured valu es to con di tion m on i torin g, such as
WGEN .W (Acti ve Power Gen erati on), WTRM. GbxOi lTm p (Gearbox Oi l Tem perature) or th e
WALM logical nod e for read i n g an d setti ng alarm status inform ation.

6.3 Wind turbine condition monitoring logical node WCON
6.3.1 General
The d ata object n am es of th e WCON class h ave restrictions as specified bel ow. I n m an y
cases, it wi l l n ot be possi bl e to provid e a m ean in gfu l n am in g of a con d iti on m on itorin g
m easurem ent j ust by using th e d ata obj ect n am e. I t is recom m ended to su ppl em en t th e d ata
obj ect nam e wi th a m ore descri pti ve tag n am e by usin g the “d ” attribute of th e d ata classes of
th e WCON l ogical n ode. The “d” attri bu te sh al l be constructed as a concaten ation of th e “trd”,
“shfI d ”, “brgPos” and “m xType” as specifi ed i n Cl ause 8. An n ex A an d Ann ex B provi d e a
gu i d el i n e for descri pti ve tag nam i ng to be used for the “d” attribu te.
The n am in g con ven tion s described in I EC 61 850-7-1 : 201 1 , 1 4. 3 an d I EC 61 850-7-2: 201 0,
Cl ause 22 sh al l be applied for th e “ven d or specific d ata object nam e” and “ven d or specific bin
nam e”.
a)
b)
c)
d)

Maxim um l en gth is 1 2 ch aracters.
Shal l n ot start wi th a n umber.

Shal l n ot con tain spaces.
The characters allowed shall be:
“A” to “Z”, “a” to “z”, “0” to “9” an d “_”

The WCON logical n ode shal l be defin ed as speci fied in Tabl e 3. Vend or specific d atan am es
can be constructed by usin g th e abbrevi ations of Tabl e 1 an d th e attri bu te d efi n i ti ons of
Cl ause 8. Refer to th e exam pl es i n th e explan ati on colum n of Tabl e 3.


BS EN 61400‑25‑6:2017
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I EC 61 400-25-6: 201 6

 I EC 201 6

Table 3 – LN: Wind turbine condition monitoring information (WCON)
Data object name

WCON class
Attr. type Explanation

M/O

LN sh al l i n h eri t al l m an datory d ata from wi n d power
pl an t com m on l ogi cal n od e cl ass (see 6. 1 . 1 of
I EC 61 400-25-2: 201 5)

M


e. g. , ConM es001 for vi brati on of gen erator d ri ve en d

GC_1 O

…

GC_1 O

CM M

e. g. , ConM es002 for generator shaft vi brati on

GC_1 O

<vend or speci fi c bi n nam e 1 >

CMB

e. g. , Bn1 Pwr

GC_1 O

<vend or speci fi c bi n nam e 2>

CMB

e. g. , Bn2Pwr

GC_1 O


…

GC_1 O

Data
Me a sure d in fo rm a tio n

<vend or speci fi c d ata obj ect n am e>

CM M

..
<vend or speci fi c d ata obj ect n am e>
Co n figu ra tio n

…
<vend or speci fi c bi n nam e n + 1 >

CMB

e. g. , Bn1 Tm p

GC_1 O

<vend or speci fi c bi n nam e n + 2>

CMB

e. g. , Bn2Tm p


GC_1 O

6.3.2

CDCs applicable for the logical node WCON

Al l com m on data cl asses that are specified or referenced i n this docum ent or in
I EC 61 400-25-2 can be u sed for specifyin g th e d ata in th e l og ical n ode WCON .

7 Common data classes for wind turbine condition monitoring
7.1 General
All com m on data classes th at are specified i n I EC 61 400-25-2 can be appl i ed for con dition
m onitori ng . Ad di tion all y, the foll owi n g com m on d ata cl asses are specifical l y related to
con d ition m on i tori n g:
a) con d ition m on i tori n g bin (CM B);
b) con d ition m on i tori n g m easurem ent (CM M);
c) comm on data cl ass scalar array val ue (SVA);
d) com plex m easurem ent valu e array (CM VA).

7.2 Common data classes defined in IEC 61 400-25-2

The comm on d ata cl asses specified or referenced in Clause 7 of I EC 61 400-25-2: 201 5 are
applicabl e for m od el l in g con d ition m on i toring inform ation as wel l as th e com m on d ata cl asses
defin ed i n th e 7. 5 up to 7. 8.

7.3 Conditions for data attribute inclusion
Subclause 7. 3 l ists th e con d itions th at specify th e presence of a d ata attribute.
Tabl e 4 g ives th e con d iti ons used i n th is docu m ent i n d icatin g th e th e presence of d ata
attributes.



BS EN 61400‑25‑6:2017
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 I EC 201 6

– 19 –

Table 4 – Conditions for the presence of a data attribute
Abbreviation

Condition

AC_DLN _M

Th e d ata attri bute shal l be present, i f d ata n am e space of th i s data d evi ates from the d ata
n am e space referen ced by ei th er l n N s of th e l ogi cal n od e i n whi ch th e d ata i s con tai n ed or
l d N s of th e l ogi cal devi ce i n wh i ch th e d ata i s contai ned (appl i es to dataN s i n al l CDCs
onl y)

AC_DLN DA_M

Th e d ata attri bute shal l be present, i f CDC nam e space of thi s d ata d evi ates from the CDC
n am e space referen ced by ei th er th e d ataN s of th e d ata, th e l n N s of th e l ogi cal nod e i n
whi ch th e d ata i s defi n ed or l d N s of the l ogi cal d evi ce i n whi ch th e d ata i s contai ned
(appl i es to cdcN s an d cd cN am e i n al l CDCs on l y)

AC_SCAV

Th e presen ce of the confi g urati on d ata attri bute d epen d s on th e presen ce of i an d f of the

an al og val ue of th e d ata attri bu te to whi ch th i s confi gu rati on d ata attri bu te rel ates. For a
gi ven d ata obj ect, th at d ata attri bu te
– sh al l be present, i f both i an d f are present,
–

shal l be opti onal i f on l y i i s present, an d

–

i s n ot req ui red i f onl y f i s present.

N OTE I f on l y i i s presen t i n a devi ce wi th ou t fl oati n g poi nt capabi l i ti es, th e confi gu rati on
param eter can possi bl y be exchan ged offl i n e.
MF(si bl i n g)

M F(si bl i n g): Param eter sib lin g: si bl i n g el em en t nam e. M and atory i f
present, oth erwi se forbi d den

GC_1

At l east on e of th e data attri butes shal l be presen t for a gi ven i n stan ce of DataObj ect /
SubDataObj ect

M

Data attri bu te i s m an datory

O

Data attri bu te i s opti on al


7.4

sib lin g

Common data class attribute name semantic

Tabl e 5 lists the sem antic for th e com m on d ata attributes used in th is d ocu m ent

el em en t i s


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I EC 61 400-25-6: 201 6

 I EC 201 6

Table 5 – Common data class attribute name semantic
Data attribute name

Semantic

bn Ref

Con di ti on m on i tori n g bi n obj ect referen ce

trd


Transd u cer n am e accord i n g to 8. 2. 2

sh fI d

Sh aft i den ti fi cati on accord i ng to m odel from Fi gure 8

brgPos

Beari n g posi ti on accord i n g to m odel from Fi gure 8

m xType

Measurem ent type accord i ng to 8. 2. 4

stVal

Status of the bi n. Thi s m eans th at the “bi n ” i s acti ve or not. The “bi n ” i s acti ve wh en al l
th e m easu red val u es are i n si d e th e ran ges con fi g u red for th at bi n

refx

Reference to operati on al state val ue to be used for bi n ni n g

minx

Mi n i m u m val u e of operati on al state val ue

m axx

Maxi m u m val u e of operati on al state val u e


i nstM agI

I n stant m agni tud e i n teger

i nstM agF

I n stant m agni tud e fl oat

m agI

m agni tud e i n teg er (d ead band )

m agF

m agni tud e fl oat (d ead band )

nu m SV

N u m ber of el em en ts i n SVA

un i ts

SI u ni t of el em en ts i n SVA or u n i t of absci ssa, e. g. H z

Db

Dead ban d used at m agI or m agF Deadban d . Sh al l represen t a confi g urati on param eter
u sed to cal cu l ate al l deadban d ed d ata attri bu tes. Th e val u e sh al l represent the
percen tage of th e d i fferen ce between m axi m um an d m i n im um i n i n crem ents of 0, 001 %


zeroDb

Confi gu rati on param eter u sed to cal cul ate th e ran ge arou nd zero, where th e an al ogu e
val u e wi l l be forced to zero. Th e val u e sh al l represen t th e percentag e of di fferen ce
between m axi m u m an d m i n i m um i n i ncrem ents of 0, 001 %

sVC

Scal ed val u e con fi g – offset an d gai n

sm pRate

Sam pl e rate

Offset

Correspon di n g absci ssa val ue from fi rst el em en t i n array

Del ta

I n crem ental val u e of absci ssa

7.5

Condition monitoring bin (CMB)

CM B com m on d ata class i nclu des:

•

•

references to th e m easured val u es th at defin es th i s bi n;
a m in im um an d a m axim um for th e bin d efin ition .

Com m on d ata class CM B sh all be defin ed as specified i n Table 6.