IEC TR 62001-4:2021

High-voltage direct current (HVDC) systems - Guidance to the specification and design evaluation of AC filters - Part 4: Equipment

IEC TR 62001-4:2021

Name:IEC TR 62001-4:2021   Standard name:High-voltage direct current (HVDC) systems - Guidance to the specification and design evaluation of AC filters - Part 4: Equipment
Standard number:IEC TR 62001-4:2021   language:English language
Release Date:06-Sep-2021   technical committee:SC 22F - Power electronics for electrical transmission and distribution systems
Drafting committee:MT 21 - TC 22/SC 22F/MT 21   ICS number:29.200 - Rectifiers. Convertors. Stabilized power supply

IEC TR 62001-4
Edition 2.0 2021-09
TECHNICAL
REPORT
High-voltage direct current (HVDC) systems – Guidance to the specification and
design evaluation of AC filters –
Part 4: Equipment




your local IEC member National Committee for further information.

IEC Central Office Tel.: +41 22 919 02 11
3, rue de
CH-1211 Geneva 20
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 18 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary

(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc

If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
.
IEC TR 62001-4
Edition 2.0 2021-09
TECHNICAL
REPORT
High-voltage direct current (HVDC) systems – Guidance to the specification and

design evaluation of AC filters –

Part 4: Equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200 ISBN 978-2-8322-1013-0

– 2 – IEC TR 62001-4:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references. 9
3 Terms and definitions . 9
4 Steady state rating . 9
4.1 General . 9
4.2 Calculation method . 9
4.2.1 General . 9
4.2.2 AC system pre-existing harmonics . 11
4.2.3 Combination of converter and pre-existing harmonics . 12
4.2.4 Equipment rating calculations . 12
4.2.5 Application of voltage ratings. 16
4.3 AC network conditions . 16
4.4 De-tuning effects . 16
4.5 Network impedance for rating calculations . 16
4.6 Outages . 17
5 Transient stresses and rating . 17
5.1 General . 17
5.2 Switching impulse studies . 18
5.2.1 Energization and switching . 18
5.2.2 Faults external to the filter . 20
5.2.3 Faults internal to the filter . 21
5.2.4 Transformer inrush currents . 22
5.3 Fast fronted waveform studies . 22
5.3.1 General . 22
5.3.2 Lightning strikes . 22
5.3.3 Busbar flashover studies . 22
5.4 Insulation co-ordination . 22
6 Losses . 24
6.1 Background . 24
6.2 AC filter component losses . 24
6.2.1 General . 24
6.2.2 Filter/shunt capacitor losses . 24
6.3 Reactor and resistor losses . 26
6.3.1 General . 26
6.3.2 Filter resistor losses . 27
6.3.3 Shunt reactor losses . 27
6.4 Criteria for loss evaluation . 27
6.4.1 General . 27
6.4.2 Fundamental frequency AC filter busbar voltage . 28
6.4.3 Fundamental frequency and ambient temperature . 28
6.4.4 AC system harmonic impedance . 28
6.4.5 Harmonic currents generated by the converter . 29
6.4.6 Pre-existing harmonic distortion . 29
6.4.7 Anticipated load profile of the converter station . 29

7 Design issues and special applications . 30
7.1 General . 30
7.2 Performance aspects . 30
7.2.1 Low order harmonic filtering and resonance conditions with AC system . 30
7.2.2 Definition of interference factors to include harmonics up to 5 kHz . 31
7.2.3 Triple-tuned filter circuits . 32
7.2.4 Harmonic AC filters on tertiary winding of converter transformers . 33
7.3 Rating aspects . 34
7.3.1 Limiting high harmonic currents in parallel-resonant filter circuits . 34
7.3.2 Transient ratings of parallel circuits in multiple tuned filters . 34
7.3.3 Overload protection of high-pass harmonic filter resistors . 34
7.3.4 Back-to-back switching of filters or shunt capacitors . 35
7.3.5 Short time overload – reasonable specification of requirements . 35
7.3.6 Low voltage filter capacitors without fuses . 36
7.4 Filters for special purposes . 36
7.4.1 Harmonic filters for damping transient overvoltages . 36
7.4.2 Non-linear filters for low order harmonics/transient overvoltages . 37
7.4.3 Series filters for HVDC converter stations . 38
7.4.4 Re-tunable AC filters . 41
7.5 Impact of new HVDC station in vicinity of an existing station . 42
7.6 Redundancy issues and spares . 43
7.6.1 Redundancy of filters – Savings in ratings and losses . 43
7.6.2 Internal filter redundancy . 44
7.6.3 Spare parts . 44
8 Protection . 45
8.1 Overview. 45
8.2 General . 45
8.3 Bank and sub-bank overall protection . 47
8.3.1 General . 47
8.3.2 Short-circuit protection . 47
8.3.3 Overcurrent protection . 47
8.3.4 Thermal overload protection . 47
8.3.5 Differential protection . 48
8.3.6 Earth fault protection . 48
8.3.7 Overvoltage and undervoltage protection . 48
8.3.8 Special protection functions and harmonic measurements . 49
8.3.9 Busbar and breaker failure protection . 49
8.4 Protection of individual filter components . 49
8.4.1 Unbalance protection for filter and shunt capacitors . 49
8.4.2 Protection of low voltage tuning capacitors . 51
8.4.3 Overload protection and detection of filter detuning . 51
8.4.4 Temperature measurement for protection . 51
8.4.5 Measurement of fundamental frequency components . 51
8.4.6 Capacitor fuses . 51
8.4.7 Protection and rating of instrument transformers . 52
8.4.8 Examples of protection arrangements . 53
8.5 Personnel protection . 53
9 Audible noise . 56
9.1 General . 56

– 4 – IEC TR 62001-4:2021 © IEC 2021
9.2 Sound active components of AC filters . 56
9.3 Sound requirements . 58
9.4 Noise reduction . 58
10 Seismic requirements . 59
10.1 General .
...

  • Relates Information
  • ISO 8130-9:1992

    ISO 8130-9:1992 - Coating powders
    09-28
  • EN 352-2:2020/FprA1

    EN 352-2:2021/oprA1:2023
    09-28
  • IEC TS 61158-4:1999

    IEC TS 61158-4:1999 - Digital data communications for measurement and control - Fieldbus for use in industrial control systems - Part 4: Data Link protocol specification Released:3/24/1999 Isbn:2831847656
    09-28
  • HD 566 S1:1990

    HD 566 S1:1998
    09-28
  • ISO 5131:1982/Amd 1:1992

    ISO 5131:1982/Amd 1:1992
    09-28
  • EN 60598-2-22:1990

    EN 60598-2-22:1996
    09-27
  • ISO 8504-2:1992

    ISO 8504-2:1992 - Preparation of steel substrates before application of paints and related products -- Surface preparation methods
    09-27
  • EN 12165:2024

    prEN 12165:2022
    09-27
  • IEC TS 61158-6:1999

    IEC TS 61158-6:1999 - Digital data communications for measurement and control - Fieldbus for use in industrial control systems - Part 6: Application Layer protocol specification Released:3/24/1999 Isbn:2831847613
    09-27
  • ISO 4252:1992

    ISO 4252:1992 - Agricultural tractors -- Operator's workplace, access and exit -- Dimensions
    09-27