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IEC TR 63042-303:2021

(Main)

UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters

UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters

IEC TR 63042-303:2021(E) specifies measurement methods of UHV AC transmission line power frequency parameters. These measured parameters mainly include sequence parameters, mutual parameters between double-circuit lines, phase parameters and some other related parameters.

General Information

Status
Published
Publication Date
06-Apr-2021
ICS
29.240.20 - Power transmission and distribution lines
Technical Committee
TC 122 - UHV AC transmission systems
Drafting Committee
WG 3 - TC 122/WG 3
Current Stage
PPUB - Publication issued
Start Date
06-May-2021
Completion Date
07-Apr-2021
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IEC TR 63042-303:2021 - UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parametersIEC TR 63042-303:2021 - UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters
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Technical report
IEC TR 63042-303:2021 - UHV AC transmission systems - Part 303: Guideline for the measurement of UHV AC transmission line power frequency parameters
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IEC TR 63042-303 ®
Edition 1.0 2021-04
TECHNICAL
REPORT
UHV AC transmission systems –
Part 303: Guideline for the measurement of UHV AC transmission line power
frequency parameters
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
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IEC TR 63042-303 ®
Edition 1.0 2021-04
TECHNICAL
REPORT
UHV AC transmission systems –
Part 303: Guideline for the measurement of UHV AC transmission line power

frequency parameters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.20 ISBN 978-2-8322-9646-2

– 2 – IEC TR 63042-303:2021 © IEC 2021
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 General . 9
4.1 Background. 9
4.2 Measurement items . 9
4.3 Main circuit configuration . 10
4.4 Measurement condition . 10
5 Requirement of measuring instrument . 10
5.1 Current transformer. 10
5.2 Voltage transformer . 10
5.3 Measuring instrument of DC resistance . 10
5.4 Offset frequency power source . 11
5.5 Special measuring instrument of transmission line power frequency
parameter . 11
6 Conversion of offset frequency measurement results . 11
7 Measurement of induced voltage and induced current . 12
7.1 General . 12
7.2 Induced voltage . 12
7.3 Induced current . 13
8 Phase verification and measurement of insulation resistance . 13
8.1 General . 13
8.2 Phase verification . 13
8.3 Measurement of insulation resistance . 14
9 Measurement of DC resistance . 14
10 Measurement of positive-sequence parameter . 15
11 Measurement of zero-sequence parameter . 17
12 Measurement of mutual impedance and coupling capacitance between double-
circuit transmission lines on the same tower . 19
12.1 General . 19
12.2 Measurement of line-mode impedance . 20
12.3 Measurement of line-mode capacitance . 20
12.4 Measurement of ground-mode impedance . 20
12.5 Measurement of ground-mode capacitance . 21
12.6 Data process . 21
13 Measurement of phase parameters . 22
13.1 Measurement of self-impedance . 22
13.2 Measurement of self-capacitance . 23
13.3 Measurement of coupling capacitance between two phases . 24
13.4 Measurement of mutual impedance between two phases . 25
Annex A (informative) Example of transmission line power frequency parameter
measurement . 28
A.1 Introduction of transmission line . 28
A.2 Measurement of positive-sequence parameter . 28

A.2.1 Measured data . 28
A.2.2 Calculation results . 28
A.3 Measurement of zero-sequence parameter . 29
A.3.1 Measured data . 29
A.3.2 Calculation results . 29
A.4 Measurement of phase parameter . 29
A.4.1 General . 29
A.4.2 Capacitance matrix . 30
A.4.3 Impedance matrix . 30
Annex B (informative) Derivation process of measurement and calculation for
coupling capacitance between two phases . 31
Annex C (informative) Safety precautions . 34
Bibliography . 35
Figure 1 – Measurement of induced voltage . 12
Figure 2 – Measurement of induced voltage . 13
Figure 3 – Measurement of induced current . 13
Figure 4 – Phase verification . 14
Figure 5 – Measurement of insulation resistance . 14
Figure 6 – Measurement of DC resistance . 15
Figure 7 – Measurement of positive-sequence parameter . 16
Figure 8 – Measurement of zero-sequence parameter . 18
Figure 9 – Measurement of line-mode impedance . 20
Figure 10 – Measurement of line-mode capacitance . 20
Figure 11 – Measurement of ground-mode impedance . 21
Figure 12 – Measurement of ground-mode capacitance . 21
Figure 13 – Measurement of self-impedance by two-terminal synchronous

measurement method . 22
Figure 14 – Measurement of self-capacitance by two-terminal synchronous
measurement method . 23
Figure 15 – Measurement of coupling capacitance between two phases . 24
Figure 16 – Measurement of mutual impedance between two phases . 26
Figure B.1 – The π-equivalent circuit of 3-phase system during measurement . 31
Table 1 – Calculation method of positive-sequence parameters . 17
Table 2 – The calculation method of zero-sequence parameters . 18
Table 3 – Calculation process and equations of parameters per unit length of double-
circuit lines on the same tower . 22
Table 4 – The calculation of self-impedance . 23
Table 5 – The calculation of self-capacitance . 24
Table A.1 – Measured data of transmission line I . 28
Table A.2 – Positive-sequence parameters of transmission line I . 28
Table A.3 – DC resistance of line I . 29
Table A.4 – Measured data of transmission line I . 29
Table A.5 – Zero-sequence parameters of transmission line I . 29

– 4 – IEC TR 63042-303:2021 © IEC 2021
Table A.6 – The capacitance matrix of transmission line I and II . 30
Table A.7 – The resistance matrix of transmission line I and II . 30
Table A.8 – The reactance matrix of transmission line I and II . 30

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
UHV AC TRANSMISSION SYSTEMS –
Part 303: Guideline for the measurement of UHV AC
transmission line power frequency parameters

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,
Technic
...

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