IEC TS 63042-302:2021

IEC TS 63042-302 ®
Edition 1.0 2021-10
TECHNICAL
SPECIFICATION
colour
inside
UHV AC transmission systems –
Part 302: Commissioning
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.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
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 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
committee, …). It also gives information on projects, replaced have 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and withdrawn publications.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
and French, with equivalent terms in 18 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: sales@iec.ch.
IEC TS 63042-302 ®
Edition 1.0 2021-10
TECHNICAL
SPECIFICATION
colour
inside
UHV AC transmission systems –
Part 302: Commissioning
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.01; 29.240.10 ISBN 978-2-8322-1024-6

– 2 – IEC TS 63042-302:2021  IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General . 9
4.1 Requirements . 9
4.2 Main purpose . 9
4.3 General structure of commissioning . 10
4.4 Scope of application . 10
4.5 Technical preparation of system commissioning . 10
5 Pre-commissioning . 11
5.1 General . 11
5.2 Combined test . 11
5.2.1 General . 11
5.2.2 Protection and control system test . 11
5.2.3 Instrument transformer test . 12
5.2.4 Switchgear and transformer test . 12
5.2.5 AC and DC power supply system test . 13
5.3 Communication system test . 13
6 System commissioning . 13
6.1 General . 13
6.2 Test requirements . 14
6.2.1 General . 14
6.2.2 Energizing test of no-load UHV power transformer . 14
6.2.3 Energizing test of tertiary connected reactor . 14
6.2.4 Energizing test of tertiary connected capacitor . 15
6.2.5 Energizing test of UHV busbar shunt reactor . 16
6.2.6 Energizing test of UHV busbar . 16
6.2.7 Energizing test of no-load UHV transmission line . 17
6.2.8 Loop closing (interconnecting)/opening (splitting) test . 18
7 Measurement in system commissioning . 19
7.1 General . 19
7.2 Measurement requirements . 19
7.2.1 General . 19
7.2.2 Transient voltage and current measurement . 19
7.2.3 Electric quantity measurement . 20
7.2.4 Relay protection measurement . 20
7.2.5 Harmonic measurement . 20
7.2.6 Sound level measurement of power transformer/shunt reactor . 20
7.2.7 Vibration measurement . 21
7.2.8 DGA of power transformer/shunt reactor . 21
7.2.9 Temperature measurement . 21
7.2.10 Power frequency electric and magnetic field measurement of substation
and transmission line . 22
7.2.11 Audible noise measurement of substation and transmission line . 22

7.2.12 Radio interference measurement of transmission line . 22
7.2.13 Partial discharge monitoring in GIS/power transformer . 22
Annex A (informative) Commissioning experiences in China . 23
A.1 General . 23
A.2 Overview. 23
A.3 Regulations . 23
A.4 Pre-commissioning . 23
A.5 System commissioning . 26
A.5.1 General . 26
A.5.2 Technical preparations . 26
A.5.3 Confirmation on preconditions for on-site commissioning . 27
A.5.4 System commissioning tests . 27
A.6 Measurement in system commissioning . 35
A.6.1 General . 35
A.6.2 Measurement in system commissioning . 36
Annex B (informative) Commissioning experiences in Japan . 39
B.1 Overview. 39
B.2 Regulations . 39
B.3 Pre-commissioning in Japan . 39
B.3.1 General . 39
B.3.2 Combined test . 40
B.3.3 Communication system test . 41
B.4 System commissioning in Japan . 42
B.4.1 General . 42
B.4.2 Energizing test. 42
B.5 Measurement in system commissioning in Japan . 43
B.5.1 General . 43
B.5.2 Measurement in system commissioning . 44
Annex C (informative) Commissioning experiences in India . 51
C.1 Overview. 51
C.2 Design, testing, installation, transportation and construction . 52
C.3 On-site acceptance tests . 53
C.3.1 General . 53
C.3.2 1 200/400 kV, 333 MVA single phase transformers . 53
C.3.3 1 200 kV dead tank spring-spring type SF6 circuit-breakers . 53
C.3.4 1 200 kV double break centre rotating and knee type disconnector . 54
C.3.5 1 200 kV capacitive voltage transformers . 54
C.3.6 850 kV surge arrestors . 54
C.4 Commissioning . 54
Bibliography . 56

Figure 1 – General structure of on-site acceptance tests and commissioning . 10
Figure A.1 – Circuit for test of UHV transformer with current increasing from zero . 31
Figure A.2 – Circuit for test of UHV transformer with voltage increasing from zero . 32
Figure A.3 – Circuit for loop closing (interconnecting)/opening (splitting) test operated
by UHV transmission line circuit breakers . 34
Figure B.1 – Circuit for transient voltage and current measurement . 44

– 4 – IEC TS 63042-302:2021  IEC 2021
Figure B.2 – Analysis results of electrostatic induced field in the vicinity of bushing
above the ground . 47
Figure B.3 – Electrostatic induction field intensity distribution . 47
Figure C.1 – Basic set-up at Bina 1 200 kV National Test Station . 52
Figure C.2 – Typical variation in voltage over the period of 4 days at Bina 1 200 kV

National Test Station . 55

Table 1 – Scope of application . 10
Table 2 – Recommended test items of pre-commissioning .
...