• EN 61400-21:2008

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

    WIND TURBINES - PART 21: MEASUREMENT AND ASSESSMENT OF POWER QUALITY CHARACTERISTICS OF GRID CONNECTED WIND TURBINES

    Available format(s): 

    Superseded date:  05-02-2022

    Language(s): 

    Published date:  07-11-2008

    Publisher:  European Committee for Standards - Electrical

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    Table of Contents - (Show below) - (Hide below)

    FOREWORD
    INTRODUCTION
    1 Scope
    2 Normative references
    3 Terms and definitions
    4 Symbols and units
    5 Abbreviations
    6 Wind turbine power quality characteristic parameters
      6.1 General
      6.2 Wind turbine specification
      6.3 Voltage fluctuations
          6.3.1 General
          6.3.2 Continuous operation
          6.3.3 Switching operations
      6.4 Current harmonics, interharmonics and higher frequency
          components
      6.5 Response to voltage drops
      6.6 Active power
          6.6.1 Maximum measured power
          6.6.2 Ramp rate limitation
          6.6.3 Set-point control
      6.7 Reactive power
          6.7.1 Reactive power capability
          6.7.2 Set-point control
      6.8 Grid protection
      6.9 Reconnection time
    7 Test procedures
      7.1 General
          7.1.1 Test validity
          7.1.2 Test conditions
          7.1.3 Test equipment
      7.2 Wind turbine specification
      7.3 Voltage fluctuations
          7.3.1 General
          7.3.2 Fictitious grid
          7.3.3 Continuous operation
          7.3.4 Switching operations
      7.4 Current harmonics, interharmonics and higher frequency
          components
      7.5 Response to temporary voltage drop
      7.6 Active power
          7.6.1 Maximum measured power
          7.6.2 Ramp rate limitation
          7.6.3 Set point control
      7.7 Reactive power
          7.7.1 Reactive power capability
          7.7.2 Set point control
      7.8 Grid protection
      7.9 Reconnection time
    8 Assessment of power quality
      8.1 General
      8.2 Voltage fluctuations
          8.2.1 General
          8.2.2 Continuous operation
          8.2.3 Switching operations
      8.3 Current harmonics, interharmonics and higher frequency
          components
    Annex A (informative) Sample report format
    Annex B (informative) Voltage fluctuations and flicker
    Annex C (informative) Measurement of active power, reactive
                          power and voltage
    Annex ZA (normative) Normative references to international
             publications with their corresponding European
             publications
    Bibliography

    Abstract - (Show below) - (Hide below)

    IEC 61400-21:2008 covers the definition and specification of the quantities to be determined for characterizing the power quality of a grid connected wind turbine; measurement procedures for quantifying the characteristics; and procedures for assessing compliance with power quality requirements, including estimation of the power quality expected from the wind turbine type.

    General Product Information - (Show below) - (Hide below)

    Committee TC 88
    Document Type Standard
    Publisher European Committee for Standards - Electrical
    Status Superseded
    Superseded By

    Standards Referenced By This Book - (Show below) - (Hide below)

    CEI CLC/TR 50373 : 2005 WIND TURBINES - ELECTROMAGNETIC COMPATIBILITY
    BS EN 61400-22:2011 WIND TURBINES - PART 22: CONFORMITY TESTING AND CERTIFICATION
    BS EN 61400-27-1 : 2015 WIND TURBINES - PART 27-1: ELECTRICAL SIMULATION MODELS - WIND TURBINES
    I.S. EN 61400-1:2005 WIND TURBINES - PART 1: DESIGN REQUIREMENTS
    CEI EN 61400-22 : 2011 WIND TURBINES - PART 22: CONFORMITY TESTING AND CERTIFICATION
    BS EN 61400-1 : 2005 WIND TURBINES - PART 1: DESIGN REQUIREMENTS
    CEI EN 61400-27-1 : 2016 WIND TURBINES - PART 27-1: ELECTRICAL SIMULATION MODELS - WIND TURBINES
    BS PD CLC/TR 50373 : 2004 WIND TURBINES - ELECTROMAGNETIC COMPATIBILITY
    I.S. EN 61400-27-1:2015 WIND TURBINES - PART 27-1: ELECTRICAL SIMULATION MODELS - WIND TURBINES
    CEI EN 61800-5-2 : 2009 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-2: SAFETY REQUIREMENTS - FUNCTIONAL
    CLC/TR 50373 : 2004 WIND TURBINES - ELECTROMAGNETIC COMPATIBILITY
    EN IEC 62933-2-1 : 2018 ELECTRICAL ENERGY STORAGE (EES) SYSTEMS - PART 2-1: UNIT PARAMETERS AND TESTING METHODS - GENERAL SPECIFICATION (IEC 62933-2-1:2017)
    I.S. EN IEC 62933-2-1:2018 ELECTRICAL ENERGY STORAGE (EES) SYSTEMS - PART 2-1: UNIT PARAMETERS AND TESTING METHODS - GENERAL SPECIFICATION
    TR 102 532 : 1.2.1 ENVIRONMENTAL ENGINEERING (EE); THE USE OF ALTERNATIVE ENERGY SOLUTIONS IN TELECOMMUNICATION INSTALLATIONS
    BS EN 61400-2:2014 (published 2014-10) Wind turbines Small wind turbines
    BS EN 61800-5-2:2017 (published 2017-09) Adjustable speed electrical power drive systems Safety requirements. Functional
    I.S. EN 61400-22:2011 WIND TURBINES - PART 22: CONFORMITY TESTING AND CERTIFICATION
    I.S. EN 61800-5-2:2017 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-2: SAFETY REQUIREMENTS - FUNCTIONAL
    EN 61400-22:2011 WIND TURBINES - PART 22: CONFORMITY TESTING AND CERTIFICATION (IEC 61400-22:2010)
    UNE-EN 61400-22:2011 Wind turbines -- Part 22: Conformity testing and certification
    EN 61400-27-1 : 2015 WIND TURBINES - PART 27-1: ELECTRICAL SIMULATION MODELS - WIND TURBINES (IEC 61400-27-1:2015)
    EN 61400-1:2005/A1:2010 WIND TURBINES - PART 1: DESIGN REQUIREMENTS
    EN 61400-2:2014 WIND TURBINES - PART 2: SMALL WIND TURBINES (IEC 61400-2:2013)
    EN 61800-5-2:2017 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 5-2: SAFETY REQUIREMENTS - FUNCTIONAL (IEC 61800-5-2:2016)

    Standards Referencing This Book - (Show below) - (Hide below)

    IEC 61800-3:2017 Adjustable speed electrical power drive systems - Part 3: EMC requirements and specific test methods
    EN 60044-2:1999/A2:2003 INSTRUMENT TRANSFORMERS - PART 2: INDUCTIVE VOLTAGE TRANSFORMERS
    IEC 61000-4-30 : 3.0EN+(REDLINE+VERSION) ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-30: TESTING AND MEASUREMENT TECHNIQUES - POWER QUALITY MEASUREMENT METHODS
    IEC 60050-415:1999 International Electrotechnical Vocabulary (IEV) - Part 415: Wind turbine generator systems
    IEC 61000-4-15 : 2.0 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-15: TESTING AND MEASUREMENT TECHNIQUES - FLICKERMETER - FUNCTIONAL AND DESIGN SPECIFICATIONS
    EN 61000-4-30:2015/AC:2017-01 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-30: TESTING AND MEASUREMENT TECHNIQUES - POWER QUALITY MEASUREMENT METHODS (IEC 61000-4-30:2015/COR1:2016)
    IEC 61400-12-1:2017 Wind energy generation systems - Part 12-1: Power performance measurements of electricity producing wind turbines
    EN 61000-3-3:2013 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 3-3: LIMITS - LIMITATION OF VOLTAGE CHANGES, VOLTAGE FLUCTUATIONS AND FLICKER IN PUBLIC LOW-VOLTAGE SUPPLY SYSTEMS, FOR EQUIPMENT WITH RATED CURRENT <= 16 A PER PHASE AND NOT SUBJECT TO CONDITIONAL CONNECTION (IEC 61000-3-3:2013)
    IEC 60044-2:1997+AMD1:2000+AMD2:2002 CSV Instrument transformers - Part 2 : Inductive voltage transformers
    EN 62008 : 2005 PERFORMANCE CHARACTERISTICS AND CALIBRATION METHODS FOR DIGITAL DATA ACQUISITION SYSTEMS AND RELEVANT SOFTWARE
    EN 61000-4-7:2002/A1:2009 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-7: TESTING AND MEASUREMENT TECHNIQUES - GENERAL GUIDE ON HARMONICS AND INTERHARMONICS MEASUREMENTS AND INSTRUMENTATION, FOR POWER SUPPLY SYSTEMS AND EQUIPMENT CONNECTED THERETO (IEC 61000-4-7:2002/A1:2008)
    IEC 62008:2005 Performance characteristics and calibration methods for digital data acquisition systems and relevant software
    EN 61400-1:2005/A1:2010 WIND TURBINES - PART 1: DESIGN REQUIREMENTS
    EN 61400-12-1:2017 WIND POWER GENERATION SYSTEMS - PART 12-1: POWER PERFORMANCE MEASUREMENT OF ELECTRICITY PRODUCING WIND TURBINES (IEC 61400-12-1:2017)
    IEC 60044-1:1996+AMD1:2000+AMD2:2002 CSV Instrument transformers - Part 1: Current transformers
    IEC TR 61000-3-7:2008 Electromagnetic compatibility (EMC) - Part 3-7: Limits - Assessment of emission limits for the connection of fluctuating installations to MV, HV and EHV power systems
    IEC 61000-4-7:2002+AMD1:2008 CSV Electromagnetic compatibility (EMC) - Part 4-7: Testing and measurement techniques - General guide on harmonics and interharmonics measurements and instrumentation, for power supply systems and equipment connected thereto
    EN 61800-3 : 2004 AMD 1 2012 ADJUSTABLE SPEED ELECTRICAL POWER DRIVE SYSTEMS - PART 3: EMC REQUIREMENTS AND SPECIFIC TEST METHODS (IEC 61800-3:2004/A1:2011)
    IEC 61000-3-3 : 3.0EN+(REDLINE+VERSION) ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 3-3: LIMITS - LIMITATION OF VOLTAGE CHANGES, VOLTAGE FLUCTUATIONS AND FLICKER IN PUBLIC LOW-VOLTAGE SUPPLY SYSTEMS, FOR EQUIPMENT WITH RATED CURRENT <= 16 A PER PHASE AND NOT SUBJECT TO CONDITIONAL CONNECTION
    EN 60044-1:1999/A2:2003 INSTRUMENT TRANSFORMERS - PART 1: CURRENT TRANSFORMERS
    IEC TR 61000-3-6:2008 Electromagnetic compatibility (EMC) - Part 3-6: Limits - Assessment of emission limits for the connection of distorting installations to MV, HV and EHV power systems
    IEC 61400-1:2005+AMD1:2010 CSV Wind turbines - Part 1: Design requirements
    EN 61000-4-15:2011 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-15: TESTING AND MEASUREMENT TECHNIQUES - FLICKERMETER - FUNCTIONAL AND DESIGN SPECIFICATIONS (IEC 61000-4-15:2010)
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