IEC 61400-25-2:2006

Wind turbines - Part 25-2: Communications for monitoring and control of wind power plants - Information models

Specifies the information model of devices and functions related to wind power plant applications. Specifies in particular the compatible logical node names, and data names for communication between wind power plant components, including the relationship between logical devices, logical nodes and data.
This publication is of high relevance for Smart Grid.

General Information

• Status: Published
• Publication Date: 13-Dec-2006
• ICS: 27.180 - Wind turbine energy systems
• Technical Committee: TC 88 - Wind energy generation systems
• Current Stage: DELPUB - Deleted Publication
• Start Date: 30-Jun-2015
• Completion Date: 26-Oct-2025

Relations

• Revised: IEC 61400-25-2:2015 - Wind turbines - Part 25-2: Communications for monitoring and control of wind power plants - Information models
• Effective Date: 05-Sep-2023

Standards Content (Sample)

INTERNATIONAL IEC
STANDARD 61400-25-2
First edition
2006-12
Wind turbines –
Part 25-2:
Communications for monitoring
and control of wind power plants –
Information models
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INTERNATIONAL IEC
STANDARD 61400-25-2
First edition
2006-12
Wind turbines –
Part 25-2:
Communications for monitoring
and control of wind power plants –
Information models
© IEC 2006 ⎯ Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
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For price, see current catalogue

– 2 – 61400-25-2 © IEC:2006(E)
CONTENTS
FOREWORD.5
INTRODUCTION.7

1 Scope.8
2 Normative references .9
3 Terms and definitions .10
4 Abbreviated terms .10
5 General .13
5.1 Overview of logical node classes.13
5.2 Use of logical node classes .15
5.3 Extensions of the information model.15
6 Wind power plant logical node classes .16
6.1 System specific logical nodes.16
6.2 Wind power plant specific logical nodes .18
6.3 Data name semantic.34
7 Common data classes .45
7.1 Basic concepts for common data classes (CDC).45
7.2 Common data class attributes .48
7.3 Wind power plant specific common data classes (CDC).53
7.4 Common data classes inherited from IEC 61850-7-3 .61
7.5 Common data class attribute semantics .63

Annex A (normative)  Information model for statistical data and historical statistical
data .68
Annex B (normative) Value range for units and multiplier .73
Annex C (informative) Wind Power Plant Controller .76
Annex D (informative) List of mandatory logical nodes and data .82

Figure 1 – Conceptual communication model of the IEC 61400-25 series .9
Figure 2 – Relationship of logical nodes.13
Figure 3 – Use of instances of logical nodes .15
Figure A.1 – Conceptual model of statistical and historical statistical data (1) .69
Figure A.2 – Conceptual model of statistical and historical statistical data (2) .70
Figure C.1 – Conceptual structure of the wind power plant control functions .76
Figure C.2 – Schematic illustration of the active power limitation control function .77
Figure C.3 – Schematic illustration of the gradient power control function.78
Figure C.4 – Schematic illustration of the delta power control function .78
Figure C.5 – Schematic illustration of a combined control – including gradient, delta
and active power limitation control .79
Figure C.6 – Schematic illustration of the apparent power control function.79
Figure C.7 – Schematic illustration of the reactive power control function .80
Figure C.8 – Schematic illustration of the power factor control function.81
Figure C.9 – Schematic illustration of the voltage control function using reactive power
control .81

61400-25-2 © IEC:2006(E) – 3 –

Table 1 – System specific logical nodes.13
Table 2 – Wind power plant specific logical nodes .14
Table 3 – Wind turbine specific logical nodes.14
Table 4 – Wind power plant common logical node class.16
Table 5 – Logical node zero class.17
Table 6 – Physical device information class .17
Table 7 – LN: Wind turbine general information (WTUR).18
Table 8 – LN: Wind turbine rotor information (WROT) .19
Table 9 – LN: Wind turbine transmission information (WTRM).20
Table 10 – LN: Wind turbine generator information (WGEN) .21
Table 11 – LN: Wind turbine converter information (WCNV) .22
Table 12 – LN: Wind turbine transformer information (WTRF) .23
Table 13 – LN: Wind turbine nacelle information (WNAC) .24
Table 14 – LN: Wind turbine yawing information (WYAW) .25
Table 15 – LN: Wind turbine tower information (WTOW) .25
Table 16 – LN: Wind power plant meteorological information (WMET) .26
Table 17 – LN: Wind power plant alarm information (WALM).27
Table 18 – LN: Wind turbine state log information (WSLG) .27
Table 19 – LN: Wind turbine analogue log information (WALG) .29
Table 20 – LN: Wind turbine report information (WREP) .32
Table 21 – LN: Wind power plant active power control information (WAPC) .33
Table 22 – LN: Wind power plant reactive power control information (WRPC) .34
Table 23 – Data name semantic.35
Table 24 – General table structure of a common data class (CDC) .46
Table 25 – Common data class attributes .47
Table 26 – Conditions for the presence of an attribute .47
Table 27 – CDC: Attribute basic types .48
Table 28 – Analogue value .48
Table 29 – TimeStamp type .49
Table 30 – TimeQuality definition.50
Table 31 – TimeAccuracy .50
Table 32 – Quality .51
Table 33 – Unit .51
Table 36 – Wind power plant specific common data classes .53
Table 37 – CDC: Setpoint value (SPV).54
Table 38 – CDC: Status Value (STV) .55
Table 39 – CDC: Alarm (ALM).56
Table 40 – CDC: Command (CMD) .57
Table 41 – CDC: Event counting (CTE).58
Table 42 – CDC: State timing (TMS) .60
Table 43 – CDC: Alarm Set Status (ASS).61
Table 44 – Specialized common data classes .62

– 4 – 61400-25-2 © IEC:2006(E)
Table 45 – Device name plate common data class specification WDPL.62
Table 46 – Common data class attribute semantic .63
Table A.1 – Description of Data .71
Table A.2 – Object reference setting group common data class specification .72
Table B.1 – SI units: base units .73
Table B.2 – SI units: derived units .73
Table B.3 – SI units: extended units.74
Table B.4 – SI units: industry specific units.74
Table B.5 – Multiplier .75
Table D.1 – Mandatory system specific logical nodes .82
Table D.2 – Mandatory wind power plant specific logical nodes .82
Table D.3 – Mandatory wind turbine specific logical nodes.82
Table D.4 – Mandatory wind power plant specific common data classes (CDC) .82
Table D.5 – Mandatory common data classes inherited from IEC 61850-7-3 .83
Table D.6 – Mandatory common data classes inherited from IEC 61850-7-3 and
specialised.83

61400-25-2 © IEC:2006(E) – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
WIND TURBINES –
Part 25-2: Communications for monitoring
and control of wind power plants –
Information models
FOREWORD
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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.
International Standard IEC 61400-25-2 has been prepared by IEC technical committee 88:
Wind turbines.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The text of this standard is based on the following documents:
FDIS Report on voting
88/275/FDIS 88/281/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts of the IEC 61400 series, under the general title Wind turbines can be found
on the IEC website.
– 6 – 61400-25-2 © IEC:2006(E)
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

61400-25-2 © IEC:2006(E) – 7 –
INTRODUCTION
The IEC 61400-25 series defines communication for monitoring and control of wind power
plants. The modeling approach of the IEC 61400-25 series has been selected to provide
abstract definitions of classes and services such that the specifications are independent of
specific protocol stacks, implementations, and operating systems. The mapping of these
abstract classes and services to a specific communication profile is not within the scope of
this part of the IEC 61400-25 series but within the scope of future IEC 61400-25-4 .
To reach interoperability, all data in the information model need a strong definition with regard
to syntax and semantics. The semantics of the data is mainly provided by names assigned to
logical nodes and data they contain, as defined in this part of the IEC 61400-25 series.
Interoperability is easiest if as much as possible of the data are defined as mandatory.
It should be noted that data with full semantics is only one of the elements required to achieve
interoperability. Since data and services are hosted by devices (IED), a proper device model
is needed along with compatible domain specific services (see IEC 61400-25-3).
This part is used to specify the abstract definitions of a logical device class, logical node
classes, data classes, and abstract common data classes. These abstract definitions are
mapped into concrete object definitions that are to be used for a particular protocol.
The compatible logical node name and data name definitions found in this part and the
associated semantics are fixed.
NOTE Performance of the IEC 61400-25 series implementations are application specific. The IEC 61400-25 series
does not guarantee a certain level of performance. This is beyond the scope of the IEC 61400-25 series. However,
there is no underlying limitation in the communications technology to prevent high speed application (millisecond
level responses).
—————————
To be published.
– 8 – 61400-25-2 © IEC:2006(E)
WIND TURBINES –
Part 25-2: Communications for monitoring
and control of wind power plants –
Information models
1 Scope
The focus of the IEC 61400-25 series is on the communications between wind power plant
components such as wind turbines and actors such as SCADA systems. Internal
communication within wind power plant components is outside the scope of the IEC 61400-25
series.
The IEC 61400-25 series is designed for a communication environment supported by a client-
server model. Three areas are defined, that are modelled separately to ensure the scalability
of implementations:
1) wind power plant information models,
2) information exchange model, and
3) mapping of these two models to a standard communication profile.
The wind power plant information model and the information exchange model, viewed
together, constitute an interface between client and server. In this conjunction, the wind
power plant information model serves as an interpretation frame for accessible wind power
plant data. The wind power plant information model is used by the server to offer the client a
uniform, component-oriented view of the wind power plant data. The information exchange
model reflects the whole active functionality of the server. The IEC 61400-25 series enables
connectivity between a heterogeneous combination of client and servers from different
manufacturers and suppliers.
As depicted in Figure 1, the IEC 61400-25 series defines a server with the following aspects:
– information provided by a wind power plant component, for example “wind turbine rotor
speed” or “total power production of a certain time interval”, is modelled and made
available for access.
– services to exchange values of the modelled information defined in IEC 61400-25-3.
– mapping to a communication profile, providing a protocol stack, to carry the exchanged
values from the modelled information (IEC 61400-25-4).
The IEC 61400-25 series only defines how to model the information, information exchange
and mapping to specific communication protocols. The standard excludes a definition of how
and where to implement the communication interface, the application program interface and
implementation recommendations. However, the objective of the standard is that the
information associated with a single wind power plant component (such as a wind turbine) is
accessible through a corresponding logical device.
IEC 61400-25-2 specifies the information model of devices and functions related to wind
power plant applications. In particular, it specifies the compatible logical node names, and
data names for communication between wind power plant components. This includes the
relationship between logical devices, logical nodes and data. The names defined in the IEC
61400-25 series are used to build the hierarchical object references applied for
communicating with components in wind power plants.

61400-25-2 © IEC:2006(E) – 9 –
This part of IEC 61400-25 specifies common attribute types and common data classes related
to wind turbine applications. In particular it specifies common data classes for:
• setpoint value,
• status value,
• alarm,
• command,
• event counting,
• state timing,
• alarm set status.
Communication model of the IEC 61400-25 series
Client Server
Messaging
Messaging
Information exchange Information exchange
Information exchange through mapping Information exchange
through mapping
model (get, set, report, model (get, set, report,
model (get, set, report, to communication model (get, set, report,
to communication
log, control, publish / log, control, publish /
log, control, publish / profile (Read, log, control, publish /
profile (Read,
subscribe, etc.) subscribe, etc.)
subscribe, etc.) write, . message) subscribe, etc.)
write, . message)
defined in defined in
defined in defined in defined in
defined in
Wind power
Actor IEC 61400-25-3 IEC 61400-25-3
IEC 61400-25-3 IEC 61400-25-4 IEC 61400-25-3
plant
e.g. IEC 61400-25-4
SCADA component
e.g. wind turbine
Wind power plant Wind power plant
Wind power plant Wind power plant
information model information model
information model information model
(rotor speed, break
defined in (rotor speed, break
defined in
status, total power
status, total power
IEC 61400-25-2
Application Application
production, etc.)
IEC 61400-25-2
production, etc.)
defined in
defined in
IEC 61400-25-2
IEC 61400-25-2
Outside
Outside
scope
scope
IEC  2172/06
Figure 1 – Conceptual communication model of the IEC 61400-25 series
Devices implementing the information model of this part shall choose one or more logical
nodes as required by the application.
NOTE 1 The IEC 61400-25 series focuses on the common, non-vendor-specific information. Those information
items that tend to vary greatly between vendor-specific implementations can for example be specified in bilateral
agreements or by user groups.
NOTE 2 This part does not provide tutorial material.
2 Normative references
The following referenced documents are indispensable for the application 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.
IEC 61400-25 (all parts), Wind turbines - Part 25: Communications for monitoring and control
of wind power plants
IEC 61850-5, Communication networks and systems in substations – Part 5: Communication
requirements for functions and device models
IEC 61850-7-1:2003, Communication networks and systems in substations – Part 7-1: Basic
communication structure for substations and feeder equipment – Principles and models

– 10 – 61400-25-2 © IEC:2006(E)
IEC 61850-7-2:2003, Communication networks and systems in substations – Part 7-2: Basic
communication structure for substations and feeder equipment – Abstract communication
service interface (ACSI)
IEC 61850-7-3, Communication networks and systems in substations – Part 7-3: Basic
communication structure for substations and feeder equipment – Common data classes
IEC 61850-7-4, Communication networks and systems in substations – Part 7-4: Basic
communication structure for substations and feeder equipment – Compatible logical node
classes and data classes
ISO 639 (all parts), Codes for the representation of names of languages
ISO 1000, SI units and recommendations for the use of their multiples and of certain other
units
ISO 3166 (all parts), Codes for the representation of names of countries and their
subdivisions
RFC 2445, Internet Calendaring and Scheduling Core Object Specification (iCalendar)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61400-25-1 as well
as the following apply.
3.1
conditional
attribute of a common data class provided by an implementation of the IEC 61400-25 series if
a certain condition corresponding with the attribute is true
3.2
mandatory
defined content shall be provided in compliance with the IEC 61400-25 series
3.3
optional
defined content can be optionally provided in compliance with the IEC 61400-25 series
4 Abbreviated terms
CDC Common Data Class
DC Data Class
IED Intelligent Electronic Device
LCB Log Control Block
LD Logical Device
LN Logical Node
LPHD Logical node Physical Device Information
RCB Report Control Block
SBO Select Before Operate
WPP Wind Power Plant
WT Wind Turbine
XML Extensible Markup Language

Abbreviated terms used to build names of data classes found in LNs shall be as listed below.
EXAMPLE RotPos is constructed by using two names "Rot" which stands for Rotor and "Pos" which stands for
"Position". Thus the concatenated name represents a "Rotor Position”.

61400-25-2 © IEC:2006(E) – 11 –

Term Description Term Description
A Current Elev Elevator
AC AC Emg Emergency
Ack Acknowledge En Enable
Acs Access Ent Entrance
Act Actual Ety Empty
Alm Alarm Evt Event
An Analogue Ex External
Ane Anemometer Exp Expired
Ang Angle Ext Excitation
Alt Altitude Flsh Flash
At Active (real) Flt Fault
Atv Activate Ftr Filter
Av Average Gbx Gearbox
Avl Availability Gra Gradient
Az Azimuth Gri Grid
Bec Beacon Gn Generator
Bl Blade Gs Grease
Blk Blocked Hi High
Brg Bearing Hly Hourly
Brk Brake Hor Horizontal
Cab Cable Ht Heating
Calc Calculation Htex Heat-exchanger
Ccw Counter clockwise Hum Humidity
Ch Characteristic Hy Hydraulic
Chg Change Hz Frequency
Chk Check Ice Ice
Chrg Charge Id Identifier
Cl Cooling Idl Idling
Cm Command Inc Increase
Cnv Converter Inj Injection
Ct Counting Inl Inline
Ctl Control Inlet Inlet
Cw Clockwise Inst Instantaneous
d Description Intl Internal
Dat Data Lev Level
Db Deadband Log Log
DC DC (Direct Current) Lift Lift
Dcl DC-link Lim Limit
Dec Decrease Lo Low
Dehum De-humidifier Lu Lubrication
Del Delta Lum Luminosity
Det Detection Man Manual
Dir Direction Max Maximum
Disp Displacement Met Meteorological
Dly Daily Min Minimum
Dmd Demand Mly Monthly
Drv Drive Mod Mode
Dn Down Mthd Method
Egy Energy Mul Multiplier
– 12 – 61400-25-2 © IEC:2006(E)
Term Description Term Description
Mx Measurement Tra Transient
Nac Nacelle Trf Transformer
Num Number (size) Trg Trigger
Of Off line Torq Torque
Oil Oil Tur Turbine
Op Operate, Operating Un Under
Oper Operator Urg Urgent
Ov Over V Voltage
Per Period, Periodic VA Apparent power
PF Power factor Val Value
Ph Phase Vals Values
Pmp Pump Ver Vertical
Pl Plant Vib Vibration
Plu Pollution Vis Visibility
Pos Position Wd Wind (power)
Pres Pressure Wly Weekly
Prod Production Wup Windup
Pt Pitch Xdir X-direction
Ptr Pointer Ydir Y-direction
Pwr Power Yly Yearly
q Quality Yw Yaw
Rdy Ready
Rep Report
Rms Root-mean-square
Rng Range
Roof Roof
Rot Rotor (windturbine)
Rs Reset
React Reactive
Rtr Rotor (generator)
Sdv Standard deviation
Sev Severity
Seq Sequence
Shf Shaft
Smk Smoke
Smp Sampled
Sp Setpoint
Spd Speed
Src Source
St Status
Sta Stator
Stdby Standby
Stop Stop
Str Start
Sw Switch
Sys System
t Timestamp
Tm Timer
Tmp Temperature
Tot Total
Tow Tower
61400-25-2 © IEC:2006(E) – 13 –
5 General
5.1 Overview of logical node classes
The following two groups of common logical node classes are defined:
1) system specific logical nodes,
2) wind power plant specific logical nodes.
System specific logical nodes shall include all common information for physical hosting
devices and wind power independent information. Wind power plant specific logical nodes
shall inherit at least all mandatory information of system logical nodes.
All logical node classes defined in this part of the IEC 61400-25 series inherit their structure
from the abstract logical node class (LN, see Figure 2) defined in 9.1.1 of IEC 61850-7-2.
Apart from the logical node class ‘Physical Device Information’ (LPHD) all logical node
classes (LLN0 and wind power plant specific LNs) defined in this part of the IEC 61400-25
series inherit at least the mandatory information of the common logical node (Common LN).
Abstract LN Class
LN
defined in 9.1.1 of IEC
61850-7-2
Wind power plant
LPHD
common LN
system specific LNs
LLN0
Wind power plant
specific LN
e.g. WTUR
IEC  2173/06
Figure 2 – Relationship of logical nodes
The system specific logical node classes listed in Table 1 are all mandatory. The logical node
zero (LLN0) represents common information of the logical device, and the logical node
physical device (LPHD) represents common information of the physical devices hosting the
logical device (see 8.2 of IEC 61850-7-1).
Table 1 – System specific logical nodes
LN classes Description M/O
LLN0 Logical Node Zero M
LPHD Physical Device Information M

Wind power plant information shall be classified in wind power plant specific logical nodes. In
principle, classification of wind power plant information in different logical nodes is an
arbitrary process and the modelling method offers flexibility. From the viewpoint of
standardisation it is preferable that all wind power plant information will be build
unambiguously and in a similar way. Table 2 shows the wind power plant information break
down into logical nodes.
– 14 – 61400-25-2 © IEC:2006(E)
Table 2 – Wind power plant specific logical nodes
LN classes Description M/O
WTUR Wind turbine general information M
WALM Wind power plant alarm information O
WMET Wind power plant meteorological information O
WAPC Wind power plant active power control information O
WRPC Wind power plant reactive power control information O

A wind power plant consists of several components, including one or more wind turbines.
Table 3 shows the breakdown of a wind turbine into logical nodes. Each wind turbine model
shall include the mandatory logical nodes listed in Table 3. Despite of the fact that some
logical nodes are optional for use, it is highly recommended in the IEC 61400-25 series to
deviate as little as possible from the logical nodes as proposed in Table 2 and Table 3.
Table 3 – Wind turbine specific logical nodes
LN classes Description M/O
WTUR Wind turbine general information M
WROT Wind turbine rotor information M
WTRM Wind turbine transmission information O
WGEN Wind turbine generator information M
WCNV Wind turbine converter information O
WTRF Wind turbine transformer information O
WNAC Wind turbine nacelle information M
WYAW Wind turbine yawing information M
WTOW Wind turbine tower information O
WALM Wind power plant alarm information M
WSLG Wind turbine state log information O
WALG Wind turbine analogue log information O
WREP Wind turbine report information O

As shown in Table 2 and Table 3, information is mainly modelled by a set of LN classes,
which are classified by physical turbine decomposition. A useful practical exception involves
alarm information; all alarms shall be collected in a separate logical node.
Separate logical nodes for logged events (statuses, alarms, commands, event-counters,
state-timers) and logged analogue time series (long period, demands, transient recording),
shall model historical logged information.
Besides common information for all turbines (manufacturer independent), most information
will, in practice, be determined by the turbine concept, the manufacturer, the site and the
state of the art of turbine technology. For this reason, as a modelling guideline, the data class
attribute names representing the specific information in the wind power plant specific logical
nodes are focussed on the most prevailing modern wind turbine concept, namely 3-bladed,
variable speed, active pitch (electric/hydraulic) and gearbox transmission. In case of
additional information originated by other wind turbine systems or components, new data
classes or specialised data classes to existing LNs could be defined. Additional user-specific
LNs could also be defined.
61400-25-2 © IEC:2006(E) – 15 –
The semantic of the data class names and semantic definitions are alphabetically listed and
defined in 6.3. Units and multipliers associated with the data classes are specified in
Annex B.
The modelling approach, including the general table structure of a logical node, is described
in 6.2.2 of IEC 61400-25-1.
Standardised names for logical node classes are written in capital letters. Data names of the
first level in the hierarchy (below the logical node level) start with a capital letter, and attribute
names and data names of the second and lower levels in the hierarchy with a small letter.
5.2 Use of logical node classes
The logical node classes defined in this part of the standard, for example, WROT, WTUR, and
those referenced from other standards, e. g. XCBR and MMXU from 5.12.1 and 5.10.7 of
IEC 61850-7-4, have to be instantiated in real systems. Figure 3 depicts an example of a real
wind turbine that uses several instances of logical nodes.
WROT
WGEN2
WGEN1
Rotor
WTRM
Generator
Generator
Transmission
Converter
Specified in
WCNV
WNAC WYAW
IEC 61850-7-4
Nacelle
Yaw system
Tower
WTUR
WTRF
WTOW
MMXUMMXU
WREP
Transformer
MMXU
MM
WT
WSLG
controller
M
WT Circuit
Breaker
Utility
Utility Circuit
WALM
grid
Breaker
XCBR
XCBR
WAPC
WPP
Meterological
controller
WRPC
mast
WMET
IEC  2174/06
Figure 3 – Use of instances of logical nodes
The logical node instances depicted represent information from wind turbines “WTUR”, yawing
system “WYAW”, converter “WCNV”, etc. The instance names, for example of WGEN1 and
WGEN2 represent different generators. Figure 3 also illustrates the interfacing electrical
system including measurements “MMXU”, circuit breakers “XCBR”, etc. MMXU, XCBR and
other logical nodes related to the electrical system are specified in IEC 61850-7-3.
5.3 Extensions of the information model
The information model described in Clause 6 can be extended with additional logical nodes
and data for a particular implementation. If a different topology is applied (for example several
generators and gearboxes) or more sensors (temperature, current) are used for monitoring
purposes, the user is free to assign relevant information to additional data names. Any data
can be added to any logical node.

– 16 – 61400-25-2 © IEC:2006(E)
The extension rules for LNs, data classes, and data attributes shall be as defined in Annex A
of IEC 61850-7-4. The name space concept defined in Clause 14 of IEC 61850-7-1 allows one
to define any extension – the name spaces are differentiated by unique identifiers.
6 Wind power plant logical node classes
6.1 System specific logical nodes
6.1.1 Wind power plant common logical node class
The wind turbine specific compatible logical nodes classes defined in this part of the IEC
61400-25 series are specialisations of the wind turbine common logical node class as defined
in Table 4.
Table 4 – Wind power plant common logical node class
Wind power plant common Logical Node class
Attribute name Attribute Explanation M/O
type
LNName Logical node name. Shall be inherited from Logical-Node Class (see 9.1.1
of IEC 61850-7-2)
Data
Mandatory Logical Node Information (Shall be inherited by ALL LN but LPHD)
NamPlt LPL Name plate (inherited from IEC 61850-7-4) M
Optional Logical Node Information
Mod INC Mode (inherited from IEC 61850-7-4) O
Beh INS Behaviour (inherited from IEC 61850-7-4) O
Health INS Health (inherited from IEC 61850-7-4) O
Loc SPS Local operation (inherited from IEC 61850-7-4) O
EEHealth INS External equipment health (inherited from IEC 61850-7-4) O
EEName WDPL External equipment name plate O
OpCntRs INC Operation counter resetable (inherited from IEC 61850-7-4) O
OpCnt INS Operation counter (inherited from IEC 61850-7-4) O
OpTmh INS Operation time (inherited from IEC 61850-7-4) O
Information for statistical information
CalcExp SPS Calculation period expired O
CalcStr SPC Start calculation at time operTm (if set) or immediately O
CalcMthd ING Calculation Method of statistical data. Allowed values: O
PRES | MIN | MAX |TOTMIN | TOTMAX |AVG | SDV
CalcPer ING Calculation Period of statistical data, shall be in seconds O
CalcSrc ORG Object Reference to Source logical node O
NOTE All five data for statistical information shall be available if statistical information is supported.

The data CalcMthd shall be included in any logical node that represents analogue or counting
information if the calculation method is unequal PRES. The data CalcExp, CalcStr, CalcPer
and CalcSrc shall be included in any logical node that represents statistical data (MIN, MAX,
etc.).
A specialisation of this wind power plant Common Logical Node class shall inherit all
information required in the wind power plant specific logical nodes (see Table 2). For the
optional logical node information, there are three possibilities for specialisation:
– not to inherit a specific information item;
– inherit a specific information item and leave it as optional;

61400-25-2 © IEC:2006(E) – 17 –
– inherit a specific information item and define it as mandatory.
6.1.2 Logical node zero (LLN0)
The LLN0 class shall be used to address common issues for Logical Devices as defined in
Table 5.
Table 5 – Logical node zero class
LLNO class
Attribute
Attribute name Explanation M/O
type
LN shall inherit all Mandatory Data from wind power plant Common M
Logical Node Class (see 6.1.1).

The LLN0 represents information that is specific for a logical device. The name plate of the
LLN0 represents the root name space (logical device namespace, ldNs) for a logical device.
The value for the IEC 61400-25 series is “IEC 61400-25:2006”. The name space also applies
to names inherited from other standards. Only one logical device name space shall be used
for each Logical Device, i.e. only one version can be used for a single Logical Device.
6.1.3 Physical device information (LPHD)
The LPHD class shall model common issues for physical devices as defined in Table 6.
Table 6 – Physical device information class
LPHD class
Attribute name Attribute Explanation M/O
type
LNName Logical node name. Shall be inherited from Logical-Node Class (see
IEC 61850-7-2)
Data
PhyNam WDPL Physical device name plate (see 7.4.2.2) M
PhyHealth INS Physical device health (inherited from IEC 61850-7-4) M
OutOv SPS Output communications buffer overflow (inherited from IEC 61850-7-4) O
Proxy SPS Indicates if this LD is a proxy (inherited from IEC 61850-7-4) M
InOv SPS Input communications buffer overflow (inherited from IEC 61850-7-4) O
NumPwrUp INS Number of Power ups (inherited from IEC 61850-7-4) O
WrmStr INS Number of Warm Starts (inherited from IEC 61850-7-4) O
WacTrg INS Number of watchdog device resets detected (inherited from O
IEC 61850-7-4)
PwrUp SPS Power Up detected (inherited from IEC 61850-7-4) O
PwrDn SPS Power Down detected (inherited from IEC 61850-7-4) O
PwrSupAlm SPS Power supply alarm (inherited from IEC 61850-7-4) O
RsStat SPC Reset device statistics (inherited from IEC 61850-7-4) O

– 18 – 61400-25-2 © IEC:2006(E)
6.2 Wind power plant specific logical nodes
6.2.1 Wind turbine general information (WTUR)
The logical node comprises the data classes that represent the wind turbine general
information as listed in Table 7. This logical node shall be mandatory, which means that at
least all mandatory defined data classes shall be available for compliance with this part of the
IEC 61400-25 series.
Table 7 – LN: Wind turbine general information (WTUR)
WTUR class
Attribute
Attribute name Explanation M/O
type
LN shall inherit all Mandatory Data from Wind Power Plant Common M
Logical Node Class (see 6.1.1)
Data
Common information
AvlTmRs TMS Turbine availability time (vendor-specific) O
OpTmRs TMS Operation time (vendor-specific) O
StrCnt CTE Number of turbine starts (vendor-specific) O
StopCnt CTE Number of turbine stops (vendor-specific) O
TotWh CTE Total (net) act
...