• PD IEC/TR 60071-4:2004

    Current The latest, up-to-date edition.

    Insulation co-ordination Computational guide to insulation co-ordination and modelling of electrical networks

    Available format(s):  Hardcopy, PDF

    Language(s):  English

    Published date:  17-08-2004

    Publisher:  British Standards Institution

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

    FOREWORD
    1 Scope and object
    2 Normative references
    3 Terms and definitions
    4 List of symbols and acronyms
    5 Types of overvoltages
    6 Types of studies
       6.1 Temporary overvoltages (TOV)
       6.2 Slow-front overvoltages (SFO)
       6.3 Fast-front overvoltages (FFO)
       6.4 Very-fast-front overvoltages (VFFO)
    7 Representation of network components and numerical considerations
       7.1 General
       7.2 Numerical considerations
       7.3 Representation of overhead lines and underground cables
       7.4 Representation of network components when computing temporary
            overvoltages
       7.5 Representation of network components when computing slow-front
            overvoltages
       7.6 Representation of network components when computing fast-front
            transients
       7.7 Representation of network components when computing very-fast-front
            overvoltages
    8 Temporary overvoltages analysis
       8.1 General
       8.2 Fast estimate of temporary overvoltages
       8.3 Detailed calculation of temporary overvoltages [2], [9]
    9 Slow-front overvoltages analysis
       9.1 General
       9.2 Fast methodology to conduct SFO studies
       9.3 Method to be employed
       9.4 Guideline to conduct detailed statistical methods
    10 Fast-front overvoltages analysis
       10.1 General
       10.2 Guideline to apply statistical and semi-statistical methods
    11 Very-fast-front overvoltage analysis
       11.1 General
       11.2 Goal of the studies to be performed
       11.3 Origin and typology of VFFO
       11.4 Guideline to perform studies
    12 Test cases
       12.1 General
       12.2 Case 1: TOV on a large transmission system including long
                    lines
       12.3 Case 2 (SFO) - Energization of a 500 kV line
       12.4 Case 3 (FFO) - Lightning protection of a 500 kV GIS substation
       12.5 Case 4 (VFFO) - Simulation of transients in a 765 kV GIS [51]
    Annex A (informative) Representation of overhead lines and underground
            cables
    Annex B (informative) Arc modelling: the physics of the circuit-breaker
    Annex C (informative) Probabilistic methods for computing lightning-related
            risk of failure of power system apparatus
    Annex D (informative) Test case 5 (TOV) - Resonance between a line
            and a reactor in a 400/220 kV transmission system
    Annex E (informative) Test case 6 (SFO) - Evaluation of the risk of
            failure of a gas-insulated line due to SFO
    Annex F (informative) Test case 7 (FFO) - High-frequency arc
            extinction when switching a reactor
    Bibliography
    Figures
    Tables

    Abstract - (Show below) - (Hide below)

    Gives guidance on conducting insulation co-ordination studies which propose internationally recognized recommendations.

    Scope - (Show below) - (Hide below)

    Gives guidance on conducting insulation co-ordination studies which propose internationally recognized recommendations - for the numerical modelling of electrical systems, and - for the implementation of deterministic and probabilistic methods adapted to the use of numerical programmes. Its object is to give information in terms of methods, modelling and examples, allowing for the application of the approaches presented in IEC 60071-2, and for the selection of insulation levels of equipment or installations, as defined in IEC 60071-1.

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

    Committee PEL/99
    Development Note Supersedes 02/210372 DC (09/2004)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

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

    IEC 62271-100:2008+AMD1:2012+AMD2:2017 CSV High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breakers
    IEC 60099-4:2014 Surge arresters - Part 4: Metal-oxide surge arresters without gaps for a.c. systems
    IEC 60076-8:1997 Power transformers - Part 8: Application guide
    IEC TS 60071-5:2002 Insulation co-ordination - Part 5: Procedures for high-voltage direct current (HVDC) converter stations
    IEC 60071-2:1996 Insulation co-ordination - Part 2: Application guide
    IEC 60060-1:2010 High-voltage test techniques - Part 1: General definitions and test requirements
    IEC 60071-1:2006+AMD1:2010 CSV Insulation co-ordination - Part 1: Definitions, principles and rules
    IEC 62271-102:2001+AMD1:2011+AMD2:2013 CSV High-voltage switchgear and controlgear - Part 102: Alternatingcurrent disconnectors and earthing switches
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