2020-05-07: When amdt is published, add supersession link between PR=65214 and PR=21445

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2020-05-07: When amdt is published, add supersession link between PR=64419 and PR=21139

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This part of IEC 61400 specifies procedures for validation of electrical simulation models for
wind turbines and wind power plants, intended to be used in power system and grid stability
analyses. The validation procedures are based on the tests specified in IEC 61400-21 (all
parts). The validation procedures are applicable to the generic models specified in
IEC 61400-27-1 and to other fundamental frequency wind power plant models and wind
turbine models.
The validation procedures for wind...
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    • Standard
      64 pages
      English language
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IEC TR 61400-12-4:2020 summarizes the current state of the art in numerical flow modelling, existing guidelines and past benchmarking experience in numerical model validation and verification. Based on the work undertaken, the document identifies the important technical aspects for using flow simulation over terrain for wind application as well as the existing open issues including recommendations for further validation through benchmarking tests.

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    • Technical report
      28 pages
      English language

This part of IEC 61400 defines standard electrical simulation models for wind turbines and wind
power plants. The specified models are time domain positive sequence simulation models,
intended to be used in power system and grid stability analyses. The models are applicable for
dynamic simulations of short term stability in power systems.
This document defines the generic terms and parameters for the electrical simulation models.
This document specifies electrical simulation models for the ...
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    • Standard
      97 pages
      English language
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This document specifies the implementation of a condition monitoring system for wind turbines, with particular focus on monitoring of the drivetrain. Guidance for a practical implementation of the FMSA is provided, as well as guidance for specifying best practices and minimum recommendations regarding the condition monitoring system used for failure mode detection, diagnostics and prognostics of the direct drive and geared wind turbine drivetrain, including: a) main bearing(s); b) gearbox, if ap...view more

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    • Standard
      50 pages
      French language
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    • Standard
      45 pages
      English language
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    • Draft
      50 pages
      French language
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    • Draft
      45 pages
      English language

This part of IEC 61400 specifies requirements to ensure the engineering integrity of wind
turbine blades as well as an appropriate level of operational safety throughout the design
lifetime. It includes requirements for:
• aerodynamic and structural design,
• material selection, evaluation and testing,
• manufacture (including associated quality management),
• transportation, installation, operation and maintenance of the blades.
The purpose of this document is to provide a technical refe...
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    • Standard
      67 pages
      English language
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IEC 61400-27-1:2020 defines standard electrical simulation models for wind turbines and wind power plants. The specified models are time domain positive sequence simulation models, intended to be used in power system and grid stability analyses. The models are applicable for dynamic simulations of short term stability in power systems. This document defines the generic terms and parameters for the electrical simulation models.
This document specifies electrical simulation models for the generic...
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    • Standard
      94 pages
      English language

IEC 61400-27-2:2020 specifies procedures for validation of electrical simulation models for wind turbines and wind power plants, intended to be used in power system and grid stability analyses. The validation procedures are based on the tests specified in IEC 61400-21 (all parts). The validation procedures are applicable to the generic models specified in
IEC 61400-27-1 and to other fundamental frequency wind power plant models and wind turbine models.
The validation procedures for wind turbin...
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    • Standard
      61 pages
      English language

This part of IEC 61400 specifies requirements and general principles to be used in assessing
the structural integrity of onshore wind turbine support structures (including foundations). The
scope includes the geotechnical assessment of the soil for generic or site specific purposes.
The strength of any flange and connection system connected to the rotor nacelle assembly
(including connection to the yaw bearing) are designed and documented according to this
document or according to IEC 61400...
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    • Standard
      126 pages
      English language
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IEC 61400-5:2020 specifies requirements to ensure the engineering integrity of wind turbine blades as well as an appropriate level of operational safety throughout the design lifetime. It includes requirements for:
aerodynamic and structural design,
material selection, evaluation and testing,
manufacture (including associated quality management),
transportation, installation, operation and maintenance of the blades.  The purpose of this document is to provide a technical reference for desi...
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    • Standard
      131 pages
      English and French language

2020-03-23: corrigendum created to confirm EN 61400-22:2011 and is not the result of a mistake (see BT decision D165/C016)

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IEC 61400-6:2020 specifies requirements and general principles to be used in assessing the structural integrity of onshore wind turbine support structures (including foundations). The scope includes the geotechnical assessment of the soil for generic or site specific purposes. The strength of any flange and connection system connected to the rotor nacelle assembly (including connection to the yaw bearing) are designed and documented according to this document or according to IEC 61400-1. The sco...view more

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    • Standard
      252 pages
      English and French language
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    • Standard
      123 pages
      English language

This document presents measurement procedures that enable noise emissions of a wind turbine to be characterised. This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far away enough to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to faci...view more

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    • Corrigendum
      3 pages
      English and French language
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This part of IEC 61400 deals with safety philosophy, quality assurance, and engineering
integrity and specifies requirements for the safety of small wind turbines (SWTs) including
design, installation, maintenance and operation under specified external conditions. Its
purpose is to provide the appropriate level of protection against damage from hazards from
these systems during their planned lifetime.
This standard is concerned with all subsystems of SWTs such as protection mechanisms,
int...
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    • Corrigendum
      3 pages
      English and French language
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This part of IEC 61400 specifies essential design requirements to ensure the structural
integrity of wind turbines. Its purpose is to provide an appropriate level of protection against
damage from all hazards during the planned lifetime.
This document is concerned with all subsystems of wind turbines such as control and
protection functions, internal electrical systems, mechanical systems and support structures.
This document applies to wind turbines of all sizes. For small wind turbines, I...
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    • Corrigendum
      3 pages
      English language
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This document presents measurement procedures that enable noise emissions of a wind turbine to be characterised. This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far away enough to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to faci...view more

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    • Corrigendum
      3 pages
      English and French language
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This part of IEC 61400 deals with safety philosophy, quality assurance, and engineering
integrity and specifies requirements for the safety of small wind turbines (SWTs) including
design, installation, maintenance and operation under specified external conditions. Its
purpose is to provide the appropriate level of protection against damage from hazards from
these systems during their planned lifetime.
This standard is concerned with all subsystems of SWTs such as protection mechanisms,
int...
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    • Corrigendum
      3 pages
      English and French language
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This part of IEC 61400 specifies essential design requirements to ensure the structural
integrity of wind turbines. Its purpose is to provide an appropriate level of protection against
damage from all hazards during the planned lifetime.
This document is concerned with all subsystems of wind turbines such as control and
protection functions, internal electrical systems, mechanical systems and support structures.
This document applies to wind turbines of all sizes. For small wind turbines, I...
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    • Corrigendum
      3 pages
      English language
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This document specifies additional requirements for assessment of the external conditions at an offshore wind turbine site and specifies essential design requirements to ensure the engineering integrity of fixed offshore wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime. This document focuses on the engineering integrity of the structural components of an offshore wind turbine but is also concerned with subsyst...view more

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    • Standard
      151 pages
      English language
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IEC TS 62257-9-6:2019 is available as IEC TS 62257-9-6:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62257-9-6:2019 proposes a simple selection procedure and cheap, comparative tests which can be performed in laboratories of developing countries, in order to identify the most suitable model of small Photovoltaic Individual Electrification Systems (PV- IES) up to 500 Wp for a particular...view more

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    • Technical specification
      35 pages
      English language

This part of IEC 61400 specifies additional requirements for assessment of the external conditions at an offshore wind turbine site and specifies essential design requirements to ensure the engineering integrity of fixed offshore wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime. This document focuses on the engineering integrity of the structural components of an offshore wind turbine but is also concerned wit...view more

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    • Standard
      151 pages
      English language
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IEC TR 61400-21-3:2019 provides guidance on principles which can be used as the basis for determining the application, structure and recommendations for the WT harmonic model. For the purpose of this Technical Report, a harmonic model means a model that represents harmonic emissions of different WT types interacting with the connected network.
This document is focused on providing technical guidance concerning the WT harmonic model. It describes the harmonic model in detail, covering such aspec...
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    • Technical report
      33 pages
      English language

IEC TS 61400-25-71:2019 focus on the communications between wind power plant components such as wind turbines and actors such as SCADA systems. Non­-IEC 61850/IEC 61400-25 internal communication within wind power plant components is outside the normative scope of the IEC 61400-25 series.
This document describes how to extend the IEC 61400-25 series with the IEC 61850­6 Substation Configuration description Language (SCL) file format for describing communication­-related Intelligent Electronic De...
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    • Technical specification
      86 pages
      English language

This Standard  applies to lightning protection of wind turbine generators and wind power systems. Refer to Annex M guidelines for small wind turbines. This document defines the lightning environment for wind turbines and risk assessment for wind turbines in that environment. It defines requirements for protection of blades, other structural components and electrical and control systems against both direct and indirect effects of lightning. Test methods to validate compliance are included. Guidan...view more

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    • Standard
      196 pages
      English language
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IEC 61400-24:2019 applies to lightning protection of wind turbine generators and wind power systems. Refer to guidelines for small wind turbines in annex. This document defines the lightning environment for wind turbines and risk assessment for wind turbines in that environment. It defines requirements for protection of blades, other structural components and electrical and control systems against both direct and indirect effects of lightning. Test methods to validate compliance are included. Gu...view more

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    • Standard
      196 pages
      English language
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This part of IEC 61400 includes:
• definition and specification of the quantities to be determined for characterizing the
electrical characteristics of a grid-connected wind turbine;
• measurement procedures for quantifying the electrical characteristics;
• procedures for assessing compliance with electrical connection requirements, including
estimation of the power quality expected from the wind turbine type when deployed at a
specific site.
The measurement procedures are valid for singl...
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    • Standard
      147 pages
      English language
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      1 day

This part of IEC 61400 defines an information model from which time-based, and productionbased
availability indicators for services can be derived and reported.
The purpose is to provide standardised metrics that can be used to create and organise
methods for availability calculation and reporting according to the user’s needs.
The document provides information categories, which unambiguously describe how data is
used to characterise and categorise the operation. The information model speci...
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    • Standard
      101 pages
      English language
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IEC 61400-26-1:2019 defines an information model from which time-based, and production-based availability indicators for services can be derived and reported. The purpose is to provide standardised metrics that can be used to create and organise methods for availability calculation and reporting according to the user’s needs. The document provides information categories, which unambiguously describe how data is used to characterise and categorise the operation. The information model specifies ca...view more

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    • Standard
      101 pages
      English language
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      1 day

IEC 61400-21-1:2019 includes: · definition and specification of the quantities to be determined for characterizing the electrical characteristics of a grid-connected wind turbine; · measurement procedures for quantifying the electrical characteristics; · procedures for assessing compliance with electrical connection requirements, including estimation of the power quality expected from the wind turbine type when deployed at a specific site. The measurement procedures are valid for single wind tur...view more

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    • Standard
      147 pages
      English language
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      1 day

IEC 61400-24:2019 applies to lightning protection of wind turbine generators and wind power systems. Refer to guidelines for small wind turbines in annex.
This document defines the lightning environment for wind turbines and risk assessment for wind turbines in that environment. It defines requirements for protection of blades, other structural components and electrical and control systems against both direct and indirect effects of lightning. Test methods to validate compliance are included.
...
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    • Standard
      405 pages
      English and French language
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    • Standard
      191 pages
      English language

IEC 61400-26-1:2019 defines an information model from which time-based, and production-based availability indicators for services can be derived and reported.
The purpose is to provide standardised metrics that can be used to create and organise methods for availability calculation and reporting according to the user’s needs.
The document provides information categories, which unambiguously describe how data is used to characterise and categorise the operation. The information model specifies ...
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    • Standard
      213 pages
      English and French language

IEC 61400-21-1:2019 includes:
· definition and specification of the quantities to be determined for characterizing the electrical characteristics of a grid-connected wind turbine;
· measurement procedures for quantifying the electrical characteristics;
· procedures for assessing compliance with electrical connection requirements, including estimation of the power quality expected from the wind turbine type when deployed at a specific site.
The measurement procedures are valid for single wind...
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    • Standard
      298 pages
      English and French language

This part of IEC 61400 specifies essential design requirements to ensure the structural
integrity of wind turbines. Its purpose is to provide an appropriate level of protection against
damage from all hazards during the planned lifetime.
This document is concerned with all subsystems of wind turbines such as control and
protection functions, internal electrical systems, mechanical systems and support structures.
This document applies to wind turbines of all sizes. For small wind turbines, I...
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    • Standard
      173 pages
      English language
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IEC 61400-3-1:2019 outlines the minimum design requirements for fixed offshore wind turbines and is not intended for use as a complete design specification or instruction manual.
Several different parties may be responsible for undertaking the various elements of the design, manufacture, assembly, installation, erection, commissioning, operation and maintenance of an offshore wind turbine and for ensuring that the requirements of this document are met. The division of responsibility between the...
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    • Standard
      309 pages
      English and French language

IEC TS 61400-3-2:2019 specifies additional requirements for assessment of the external conditions at a floating offshore wind turbine (FOWT) site and specifies essential design requirements to ensure the engineering integrity of FOWTs. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime.
This document focuses on the engineering integrity of the structural components of a FOWT but is also concerned with subsystems such as contr...
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    • Technical specification
      51 pages
      English language

IEC 61400-1:2019 is available as IEC 61400-1:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61400-1:2019 specifies essential design requirements to ensure the structural integrity of wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime. This document is concerned with all subsystems of wind turbines suc...
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    • Standard
      173 pages
      English language
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IEC 61400-1:2019 is available as IEC 61400-1:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61400-1:2019 specifies essential design requirements to ensure the structural integrity of wind turbines. Its purpose is to provide an appropriate level of protection against damage from all hazards during the planned lifetime. This document is concerned with all subsystems of wind turbines suc...
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    • Standard
      347 pages
      English and French language
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    • Standard
      168 pages
      English language

IEC/IEEE 60076-16:2018 is also available as IEC/IEEE 60076-16:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC/IEEE 60076-16:2018 applies to dry-type and liquid-immersed transformers for wind turbine step-up application having a winding with highest voltage for equipment up to and including 72,5 kV. This document applies to the transformer used to connect the wind turbine generator to...
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    • Standard
      21 pages
      English language

This document presents measurement procedures that enable noise emissions of a wind turbine to be characterised. This involves using measurement methods appropriate to noise emission assessment at locations close to the machine, in order to avoid errors due to sound propagation, but far away enough to allow for the finite source size. The procedures described are different in some respects from those that would be adopted for noise assessment in community noise studies. They are intended to faci...view more

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    • Standard
      10 pages
      English language
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The contents of the corrigendum of October 2019 have been included in this copy.

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    • Standard
      10 pages
      English language
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The contents of the corrigendum of October 2019 have been included in this copy.

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    • Standard
      16 pages
      English and French language

This standard deals with procedures for the assessment of electricity generation within the direct building environment through wind power systems. The wind power systems described in this document are small plants as they may occur in domestic production and use of electricity in connection with buildings. This standard covers wind generation power systems ≤ 75 kW.

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    • Standard
      16 pages
      English language
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This part of IEC 61400-25 specifies standard techniques for testing of compliance of
implementations, as well as specific measurement techniques to be applied when declaring
performance parameters. The use of these techniques will enhance the ability of users to
purchase systems that integrate easily, operate correctly, and support the applications as
intended.
This part of IEC 61400-25 defines:
• the methods and abstract test cases for compliance testing of server and client devices
used...
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    • Standard
      60 pages
      English language
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IEC 61400-25-5:2017 specifies standard techniques for testing of compliance of implementations, as well as specific measurement techniques to be applied when declaring performance parameters. The use of these techniques will enhance the ability of users to purchase systems that integrate easily, operate correctly, and support the applications as intended. This part of IEC 61400-25 defines: the methods and abstract test cases for compliance testing of server and client devices used in wind power ...view more

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    • Standard
      60 pages
      English language
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