IEC TR 63065:2017

Guidelines for operation and maintenance of line commutated converter (LCC) HVDC converter station

IEC TR 63065:2017(E) provides general guidance on basic principles and general proposals for the safe and economic operation and maintenance of an LCC converter station.
These guidelines are based on the operation and maintenance practices that have been used successfully during the last decades at HVDC converter stations all over the world, and can be referred to by new HVDC users to optimize operation and maintenance policy and assist in performing the operation and maintenance work.
This document focuses only on the operation and maintenance of the equipment inside an LCC converter station, including back-to-back HVDC systems. The operation and maintenance of HVDC overhead transmission lines, HVDC cables and voltage sourced converter (VSC) are not covered by this document.

General Information

• Status: Published
• Publication Date: 02-Jun-2022
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• ICS: 29.240.01 - Power transmission and distribution networks in general
• ICS: 33.160.20 - Radio receivers
• Technical Committee: TC 115 - High Voltage Direct Current (HVDC) transmission for DC voltages above 100 kV
• Drafting Committee: WG 6 - TC 115/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 03-Oct-2017
• Completion Date: 15-Sep-2017

Relations

• Amended By: IEC TR 63065:2017/AMD1:2022 - Amendment 1 - Guidelines for operation and maintenance of line commutated converter (LCC) HVDC converter station
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TR 63065 ®
Edition 1.0 2017-09
TECHNICAL
REPORT
Guidelines for operation and maintenance of line commutated converter (LCC)
HVDC converter station
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Central Office Tel.: [phone]
3, rue de Varembé Fax: [phone]
CH-1211 Geneva 20 [e-mail]
Switzerland www.iec.ch
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.

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IEC TR 63065 ®
Edition 1.0 2017-09
TECHNICAL
REPORT
Guidelines for operation and maintenance of line commutated converter (LCC)

HVDC converter station
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200; 29.240.01 ISBN 978-2-8322-4802-7

– 2 – IEC TR 63065:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Operation . 8
4.1 Operation policy . 8
4.1.1 Target reliability and availability . 8
4.1.2 Operation cost . 9
4.1.3 Manned or unmanned . 9
4.2 Operation condition and limits . 9
4.3 Operations of an HVDC system . 10
4.3.1 General . 10
4.3.2 Typical operation configuration . 10
4.3.3 Set up the control mode . 12
4.3.4 Operation procedure . 13
4.4 Operations of HVDC equipment . 16
4.4.1 Converter valves. 16
4.4.2 Converter transformers and oil immersed smoothing reactors . 19
4.4.3 AC/DC breakers and switchgear . 22
4.4.4 AC/DC filters . 24
4.4.5 Control and protections . 27
4.4.6 DC measurement instruments . 29
4.4.7 Valve cooling system . 30
4.4.8 Auxiliary power system . 33
5 Maintenance . 34
5.1 Maintenance policy . 34
5.1.1 General . 34
5.1.2 Corrective maintenance . 34
5.1.3 Time-based maintenance (TBM) . 34
5.1.4 Condition-based maintenance (CBM) . 35
5.1.5 Reliability-centred maintenance (RCM) . 35
5.1.6 Maintenance programme . 35
5.2 Maintenance during operation . 36
5.2.1 Routine maintenance for converter transformers . 36
5.2.2 Maintenance for control and protections . 36
5.2.3 Maintenance for DC measurements . 37
5.2.4 Routine maintenance for valve cooling system . 37
5.3 Maintenance under outage . 37
5.3.1 Converter valves. 37
5.3.2 Converter transformers . 38
5.3.3 AC/DC breakers and switchgear . 39
5.3.4 AC/DC filters . 40
5.3.5 DC measurements . 40
5.3.6 Valve cooling system . 41
5.3.7 AC/DC arresters . 41

6 Fault analysis and troubleshooting . 42
6.1 General . 42
6.2 System disturbances . 42
6.3 Station faults . 43
6.4 General information for fault analysis . 43
6.4.1 General . 43
6.4.2 Interpreting events and the TFR . 43
6.4.3 Checking plant circuit diagram and application software logics . 43
6.4.4 Analyzing the equipment status . 43
6.4.5 Simulation . 44
6.4.6 Site test . 44
6.4.7 Involving the HVDC supplier . 44
7 Training . 44
7.1 General . 44
7.2 Operator training program . 44
7.2.1 General . 44
7.2.2 Training courses . 44
7.2.3 Participation during installation and commissioning . 45
7.3 Maintenance training program . 45
7.3.1 General . 45
7.3.2 Training courses . 45
7.3.3 Training during equipment installation and testing . 46
7.3.4 Continuous transfer of knowledge . 46
8 Spare parts . 46
9 Tools . 47
10 Documentation . 48
10.1 General . 48
10.2 Documents to be provided by the supplier . 48
10.3 Documents to be prepared by the operators . 48
10.4 Statistics and analysis . 48
Bibliography . 50

Table 1 – Basic tools needed for operation and maintenance of an HVDC converter
station . 47

– 4 – IEC TR 63065:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GUIDELINES FOR OPERATION AND MAINTENANCE
OF LINE COMMUTATED CONVERTER (LCC)
HVDC CONVERTER STATION
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are mad
...

IEC TR 63065 ®
Edition 1.1 2022-06
CONSOLIDATED VERSION
TECHNICAL
REPORT
colour
inside
Guidelines for operation and maintenance of line commutated converter (LCC)
HVDC converter station
All rights reserved. Unless otherwise specified, 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
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
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 Products & Services Portal - products.iec.ch
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variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 19 additional languages.
once 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
Centre: [e-mail].
IEC TR 63065 ®
Edition 1.1 2022-06
CONSOLIDATED VERSION
TECHNICAL
REPORT
colour
inside
Guidelines for operation and maintenance of line commutated converter (LCC)
HVDC converter station
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200; 29.240.01 ISBN 978-2-8322-3828-8

IEC TR 63065 ®
Edition 1.1 2022-06
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Guidelines for operation and maintenance of line commutated converter (LCC)
HVDC converter station
– 2 – IEC TR 63065:2017+AMD1:2022 CSV
© IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions, and abbreviated terms . 6
3.1 Terms and definitions . 6
3.2 Abbreviated terms . 7
4 Operation . 8
4.1 Operation policy . 8
4.1.1 Target reliability and availability . 8
4.1.2 Operation cost . 9
4.1.3 Manned or unmanned . 9
4.2 Operation condition and limits . 9
4.3 Operations of an HVDC system . 10
4.3.1 General . 10
4.3.2 Typical operation configuration . 10
4.3.3 Set up the control mode . 12
4.3.4 Operation procedure . 13
4.4 Operations of HVDC equipment . 16
4.4.1 Converter valves. 16
4.4.2 Converter transformers and oil immersed smoothing reactors . 19
4.4.3 AC/DC breakers and switchgear . 22
4.4.4 AC/DC filters . 24
4.4.5 Control and protections . 27
4.4.6 DC measurement instruments . 29
4.4.7 Valve cooling system . 30
4.4.8 Auxiliary power system . 33
4.4.9 Fire protection system . 34
5 Maintenance . 35
5.1 Maintenance policy . 35
5.1.1 General . 35
5.1.2 Corrective maintenance . 36
5.1.3 Time-based maintenance (TBM) . 36
5.1.4 Condition-based maintenance (CBM) . 36
5.1.5 Reliability-centred maintenance (RCM) . 37
5.1.6 Maintenance programme . 37
5.2 Maintenance during operation . 37
5.2.1 Routine maintenance for converter transformers . 37
5.2.2 Maintenance for control and protections . 38
5.2.3 Maintenance for DC measurements . 38
5.2.4 Routine maintenance for valve cooling system . 38
5.2.5 Routine maintenance for Fire protection system . 39
5.3 Maintenance under outage . 39
5.3.1 Converter valves. 39
5.3.2 Converter transformers . 39
5.3.3 AC/DC breakers and switchgear . 41
5.3.4 AC/DC filters . 41

© IEC 2022
5.3.5 DC measurements . 42
5.3.6 Valve cooling system . 42
5.3.7 AC/DC arresters . 43
5.3.8 Fire protection system . 43
6 Fault analysis and troubleshooting . 44
6.1 General . 44
6.2 System disturbances . 44
6.3 Station faults . 44
6.4 General information for fault analysis . 45
6.4.1 General . 45
6.4.2 Interpreting events and the TFR . 45
6.4.3 Checking plant circuit diagram and application software logics . 45
6.4.4 Analyzing the equipment status . 45
6.4.5 Simulation . 45
6.4.6 Site test . 46
6.4.7 Involving the HVDC supplier . 46
7 Training . 46
7.1 General . 46
7.2 Operator training program . 46
7.2.1 General . 46
7.2.2 Training courses . 46
7.2.3 Participation during installation and commissioning . 46
7.3 Maintenance training program . 47
7.3.1 General . 47
7.3.2 Training courses . 47
7.3.3 Training during equipment installation and testing . 47
7.3.4 Continuous transfer of knowledge . 48
8 Spare parts . 48
9 Tools . 49
10 Documentation . 50
10.1 General . 50
10.2 Documents to be provided by the supplier . 50
10.3 Documents to be prepared by the operators . 50
10.4 Statistics and analysis . 50
Bibliography . 52

Table 1 – Basic tools needed for operation and maintenance of an HVDC converter
station . 49

– 4 – IEC TR 63065:2017+AMD1:2022 CSV
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
GUIDELINES FOR OPERATION AND MAINTENANCE
OF LINE COMMUTATED CONVERTER (LCC)
HVDC CONVERTER STATION
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of
...