IEC PAS 62001:2004

Guide to the specification and design evaluation of a.c. filters for HVDC systems

This document is a Guide to the specification and design evaluation of a.c. side harmonic performance and a.c. side filters for HVDC schemes. It is intended to be primarily for the use of the utilities and consultants who are responsible for issuing the Technical Specifications for new HVDC projects and evaluating designs proposed by prospective suppliers.

General Information

• Status: Replaced
• Publication Date: 19-Jul-2004
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• Technical Committee: SC 22F - Power electronics for electrical transmission and distribution systems
• Current Stage: DELPUB - Deleted Publication
• Completion Date: 14-Oct-2009

Relations

• Replaced By: IEC TR 62001:2009 - High-voltage direct current (HVDC) systems - Guidebook to the specification and design evaluation of A.C. filters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

PUBLICLY
IEC
AVAILABLE
PAS 62001
SPECIFICATION
First edition
Pre-Standard
2004-07
Guide to the specification
and design evaluation of a.c. filters
for HVDC systems
Reference number
IEC/PAS 62001:2004(E)
Publication numbering
As from 1 January 1997 all IEC publications are issued with a designation in the

60000 series. For example, IEC 34-1 is now referred to as IEC 60034-1.

Consolidated editions
The IEC is now publishing consolidated versions of its publications. For example,

edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the

base publication incorporating amendment 1 and the base publication incorporating

amendments 1 and 2.
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PUBLICLY
IEC
AVAILABLE
PAS 62001
SPECIFICATION
First edition
Pre-Standard
2004-07
Guide to the specification
and design evaluation of a.c. filters
for HVDC systems
© IEC 2004 – 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.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale
XH
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 –
PAS 62001 © IEC:2004 (E)
CONTENTS
FOREWORD .5

1. INTRODUCTION AND OBJECTIVES . 8

1.1 General . 9

1.2 Definitions . 9

1.3 Introduction. 9

1.4 Past experience.10

1.5 Objectives.11

1.6 Approach .11

2. GENERAL ASPECTS OF SPECIFICATIONS .12
2.1 General . 13
2.2 Boundaries of responsibility. 13
2.3 Scope of studies. 15
2.4 Scope of supply . 16
2.5 Technical data to be supplied by Contractor. 16
2.6 Alternative proposals by Bidders . 17
3. PERMISSIBLE DISTORTION LIMITS .19
3.1 General . 20
3.2 Voltage distortion. 21
3.3 Distortion limits pertaining to the HV and EHV network equipment . 27
3.4 Telephone interference . 29
3.5 Special criteria . 32
4. HARMONIC GENERATION. 43
4.1 General . 44
4.2 Converter harmonic generation . 44
4.3 Calculation methodology. 48
4.4 Sensitivity of harmonic generation to various factors . 51
4.5 Externally generated harmonics. 54
5. HARMONIC INTERACTION ACROSS CONVERTERS . 57
5.1 Introduction. 58
5.2 Interaction phenomena . 58
5.3 Interaction modelling . 59
5.4 Impact on a.c. filter design . 61
5.5 Study methods. 62
5.6 Possible countermeasures . 63

5.7 Recommendations for the Technical Specification. 64
6. FILTER ARRANGEMENTS . 65
6.1 Overview. 66
6.2 Advantages and disadvantages of typical filters . 66
6.3 Classification of filter types . 67
6.4 Tuned filters. 68
6.5 Damped filters. 73
6.6 Choice of filters. 77
ii
– 3 –
PAS 62001 © IEC:2004 (E)
7. FILTER PERFORMANCE CALCULATION . 78

7.1 Calculation procedure . 79

7.2 Detuning and tolerances. 82

7.3 Network impedance for performance calculations. 85

7.4 Outages of filter banks / sub-banks. 91

7.5 Considerations of probability. 92

7.6 Flexibility regarding compliance. 94

8. FILTER SWITCHING AND REACTIVE POWER MANAGEMENT. 96

8.1 Introduction . 97

8.2 Reactive power interchange with a.c. network. 97

8.3 HVDC converter reactive power capability. 98

8.4 Bank / sub-bank definitions and sizing. 99
8.5 Hysteresis in switching points .102
8.6 Converter Q-V control near switching points .103
8.7 Operation at increased converter control angles.103
8.8 Filter switching sequence and harmonic performance.103
8.9 Demarcation of responsibilities .105
9. STEADY STATE RATING.111
9.1 Introduction .112
9.2 Calculation method.112
9.3 A.C. network conditions.118
9.4 De-tuning effects.118
9.5 Network impedance for rating calculations.119
9.6 Outages.119
10. TRANSIENT STRESSES AND RATING .120
10.1 General . 121
10.2 Switching impulse studies . 121
10.3 Fast fronted waveform studies . 125
10.4 Insulation co-ordination . 125
11. LOSSES. 128
11.1 Background. 129
11.2 A.C. filter component losses. 129
11.3 Filter reactor losses . 131
11.4 Criteria for loss evaluation . 132
12. DESIGN ISSUES AND SPECIAL APPLICATIONS . 137
12.1 Introduction . 138
12.2 Performance aspects. 138

12.3 Rating aspects . 141
12.4 Filters for special purposes . 144
12.5 Impact of new HVDC station in vicinity of an existing station. 149
12.6 Redundancy issues and spares . 150
13. PROTECTION. 153
13.1 Introduction . 154
13.2 General .
...