UHV AC transmission systems - Part 302: Commissioning

IEC TS 63042-302:2021(E) applies to the commissioning of UHV AC transmission systems.
It mainly specifies the test purposes, test items, test preconditions, test methods and test acceptance criteria during pre-commissioning and system commissioning. Also, the measurement requirements for system commissioning are specified.

General Information

Status
Published
Publication Date
03-Oct-2021
Current Stage
PPUB - Publication issued
Completion Date
04-Oct-2021
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IEC TS 63042-302:2021 - UHV AC transmission systems - Part 302: Commissioning
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IEC TS 63042-302
Edition 1.0 2021-10
TECHNICAL
SPECIFICATION
colour
inside
UHV AC transmission systems –
Part 302: Commissioning
IEC TS 63042-302:2021-10(en)
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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

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
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– 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

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IEC TS 63042-302:2021  IEC 2021 – 3 –

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

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– 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 .................................................... 11

Table 3 – Recommended test items of system commissioning .............................................. 13

Table 4 – Recommended measurement items of system commissioning ............................... 19

Table 5 – DGA of UHV transformer, UHV reactor and neutral point reactor ........................... 21

Table A.1 – Test items for pre-commissioning of UHV AC transmission projects ................... 24

Table A.2 – System commissioning tests for UHV AC transmission projects ......................... 28

Table A.3 – Measurement items in system commissioning for UHV AC transmission

projects ................................................................................................................................. 35

Table B.1 – Pre-commissioning items ................................................................................... 39

Table B.2 – System commissioning items ............................................................................. 42

Table B.3 – Measurement items in system commissioning .................................................... 44

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IEC TS 63042-302:2021  IEC 2021 – 5 –
UHV AC TRANSMISSION SYSTEMS –
Part 302: Commissioning
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

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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC should not be held responsible for identifying any or all such patent rights.

IEC TS 63042-302 has been prepared by IEC technical committee 122: UHV AC transmission

systems. It is a Technical Specification.
The text of this Technical Specification is based on the following documents:
DTS Report on voting
122/115/DTS 122/117/RVDTS

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.

The language used for the development of this Technical Specification is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,

available at www.iec.ch/members_experts/refdocs. The main document types developed by

IEC are described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 63042 series, published under the general title UHV AC

transmission systems, can be found on the IEC website.
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– 6 – IEC TS 63042-302:2021  IEC 2021

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under webstore.iec.ch in the data related to the

specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates that it

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contents. Users should therefore print this document using a colour printer.
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IEC TS 63042-302:2021  IEC 2021 – 7 –
INTRODUCTION

Due to the increase in voltage level and transmission capacity, the reliability and security of

high voltage electric equipment and power system are facing new challenges. There is a need

to have consensus on a series of technical criteria and requirements for commissioning tests

for ultra-high voltage (UHV) AC transmission systems to check the proper and expected

performance of substation equipment and transmission lines, to verify the function of the

transmission system, to obtain the electromagnetic data and confirm the environmental

impacts complying with relevant local regulations. By commissioning, the integrated

performance and construction quality of the project before its commercial operation could be

confirmed.

This document proposes relevant test items, test preconditions, test methods, and test

acceptance criteria for pre-commissioning, system commissioning, and measurement during

system commissioning.
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– 8 – IEC TS 63042-302:2021  IEC 2021
UHV AC TRANSMISSION SYSTEMS –
Part 302: Commissioning
1 Scope

This part of IEC 63042 applies to the commissioning of UHV AC transmission systems.

It mainly specifies the test purposes, test items, test preconditions, test methods and test

acceptance criteria during pre-commissioning and system commissioning. Also, the
measurement requirements for system commissioning are specified.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their

content constitutes requirements of this document. For dated references, only the edition

cited applies. For undated references, the latest edition of the referenced document (including

any amendments) applies.
IEC 60076-6:2007, Power transformers – Part 6: Reactors
IEC 60076-10:2016, Power transformers – Part 10: Determination of sound levels
IEC 60076-10:2016/AMD1:2020

IEC 61000-4-13:2002, Electromagnetic compatibility (EMC) – Part 4-13: Testing and

measurement techniques – Harmonics and interharmonics including mains signalling at a.c.

power port, low frequency immunity tests
IEC 61000-4-13:2002/AMD1:2009
IEC 61000-4-13:2002/AMD2:2015

IEC 61786-2:2014, Measurement of DC magnetic, AC magnetic and AC electric fields from 1

Hz to 100 kHz with regard to exposure of human beings – Part 2: Basic standards for

measurements

IEC TS 63042-301:2018, UHV AC transmission systems – Part 301: On-site acceptance tests

CISPR TR 18-2:2017, Radio interference characteristics of overhead power lines and

high-voltage equipment – Part 2: Methods of measurement and procedure for determining

limits
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
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IEC TS 63042-302:2021  IEC 2021 – 9 –
3.1
commissioning

tests and measurements performed to verify the quality of equipment installation and verify

the system in an appropriate state before a transmission project being put into commercial

operation, consisting of two parts of pre-commissioning and system commissioning
3.2
pre-commissioning

series of tests and measurements performed in a substation before system commissioning of

a transmission project

Note 1 to entry: The tests include combined tests and communication tests to further assess the condition of

equipment after installation and on-site acceptance test for a transmission project.

3.3
system commissioning

series of tests and measurements performed (or checked) for the equipment and the power

system in the operating power grid after pre-commissioning

Note 1 to entry: The tests and measurements are implemented after completing on-site acceptance test and pre-

commissioning test, in order to ensure the project fulfils the requirements of commercial operation.

3.4
loop closing
loop interconnecting

operation performed by closing circuit-breaker of transmission line or transformer to make the

power grid of same or different voltage levels run in loop (synchronous interconnection)

network

Note 1 to entry: The purpose of the test is to verify the correctness of the synchronous strategy set for the tested

circuit-breakers, and to ensure security when the power grid is loop closed (interconnected).

3.5
loop opening
loop splitting

operation performed by opening circuit-breaker of transmission line or transformer to make

the power grid of same or different voltage levels run out of loop (synchronous
interconnection) network

Note 1 to entry: The purpose of the test is to verify the security when the power grid is loop opened (split).

4 General
4.1 Requirements

The overall requirements including main purpose, general method, scope of application, and

technical preparation for UHV AC system commissioning are as follows in 4.2 to 4.5 to secure

objectivity and transparency for evaluation and judgment of commissioning and to follow the

regulation of each country for safety and environmental security.
4.2 Main purpose
Commissioning is performed to confirm the integrated performance capability and

construction quality of the project before its commercial operation. The utilities should carry

out commissioning tests for UHV equipment and system-oriented aspects before the operation.

The purposes are as follows:

• to confirm the proper and expected performance of substation equipment and transmission

lines;
• to verify the function of the transmission system;
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– 10 – IEC TS 63042-302:2021  IEC 2021

• to obtain the data such as electromagnetic field, sound level, etc., and to confirm the

environmental impacts complying with relevant local regulations.
4.3 General structure of commissioning

The general structure of on-site acceptance tests and commissioning is shown in Figure 1, to

confirm the soundness of every equipment and transmission line, the communication test

between protection, control, information equipment and control centre, and also the function

of the power grid. The commissioning consists of pre-commissioning and system

commissioning. Details of pre-commissioning and system commissioning are shown in Clause

5 and Clause 6 respectively.
Figure 1 – General structure of on-site acceptance tests and commissioning
4.4 Scope of application
The scope of the application is shown in Table 1.
Table 1 – Scope of application
IEC documents Each Combined Communication Energizing Interconnecting
test test test test test
IEC TS 63042-301
UHV AC transmission systems –
Applied - - - -
Part 301: On-site acceptance
tests
IEC TS 63042-302
- Applied Applied Applied Applied
UHV AC transmission systems –
Part 302: Commissioning
4.5 Technical preparation of system commissioning

With regard to the newly constructed UHV AC substations and transmission lines, simulation

analysis should be carried out, as the necessary technical basis for evaluating the risks and

ensuring the security and availability of system commissioning tests based on the practical

conditions of equipment and nearby power grid including transmission lines.
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IEC TS 63042-302:2021  IEC 2021 – 11 –

The simulation analysis consists of two parts, power flow and stability analysis, and

electromagnetic transient analysis. The power flow and stability simulation analysis focuses

on power grid operation mode, power flow arrangement, fault current, voltage fluctuation,

system stability performance during a disturbance, and security control measures. The

electromagnetic transient analysis focuses on overvoltage and overcurrent for each

commissioning test, and technical measures to ensure the security of equipment and system.

Commissioning program should be prepared prior to on-site implementation, which should

specify the test purposes, test contents, test and measurement procedures, and on-site

security measures, etc. The commissioning program should be compiled based on the

simulation results, the practical connection wirings of the commissioned substations, and the

characteristics of commissioned equipment and transmission lines.
5 Pre-commissioning
5.1 General
The conditions of pre-commissioning for UHV AC projects are as follows:

• the installation of equipment has been completed, and on-site acceptance tests are

completed;
• the network connection of the protection and control system
...

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