IEC TR 63042-100:2016

IEC TR 63042-100 ®
Edition 1.0 2016-12
TECHNICAL
REPORT
UHV AC transmission systems –
Part 100: General information
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IEC TR 63042-100 ®
Edition 1.0 2016-12
TECHNICAL
REPORT
UHV AC transmission systems –
Part 100: General information
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.01 ISBN 978-2-8322-3791-5

– 2 – IEC TR 63042-100:2016 © IEC 2016
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 8
4 Planning . 8
4.1 General . 8
4.2 Security and stability . 9
4.3 Transmission systems . 9
4.4 System voltage . 10
4.5 Reliability and availability . 10
4.6 Transmission network . 11
4.7 Network requirement . 11
4.8 Transmission planning . 11
5 System design . 11
5.1 General . 11
5.2 System design and solutions . 11
5.2.1 Reactive power compensation . 11
5.2.2 Protection scheme . 12
5.2.3 Reclosing scheme . 12
5.3 Insulation coordination . 12
5.3.1 General . 12
5.3.2 Lightning overvoltage . 12
5.3.3 Slow front overvoltage (SFO) . 12
5.3.4 Very fast front overvoltage (VFFO) . 13
5.3.5 AC temporary overvoltage . 13
6 Transmission line and substation design. 13
6.1 General . 13
6.2 Transmission line . 14
6.2.1 General . 14
6.2.2 Basic concept for selecting the UHV AC transmission line . 14
6.2.3 Conductor design for the transmission line . 14
6.2.4 Pollution design for insulators . 14
6.2.5 Air clearance between tower and conductor . 14
6.2.6 Right of way (ROW) . 14
6.2.7 Height of conductor . 14
6.2.8 Structural tower design, foundation . 15
6.3 Substation . 15
6.3.1 Area survey and selection. 15
6.3.2 Substation bus scheme . 15
6.3.3 Substation switchgear type . 16
6.3.4 Equipment layout . 18
6.4 Main equipment for the substation and related design . 19
6.4.1 General . 19
6.4.2 Power transformers . 19
6.4.3 Switchgear . 19

6.4.4 Air clearance . 19
6.4.5 Seismic performance . 20
6.4.6 Tertiary circuit . 20
6.4.7 Substation electrical auxiliary system . 20
6.5 Control and protection and communication . 20
7 Construction . 20
7.1 General . 20
7.2 Transmission line . 21
7.2.1 Transportation and preparing work at site . 21
7.2.2 Foundation . 21
7.2.3 Assembling of tower . 21
7.2.4 Stringing . 21
7.2.5 Quality control . 21
7.3 Substation . 21
7.3.1 Transportation . 21
7.3.2 Installation . 21
8 Commissioning . 22
9 Operation and maintenance . 22
9.1 Transmission lines . 22
9.2 Substations . 23
9.2.1 General . 23
9.2.2 Operation . 23
9.2.3 Maintenance . 23
10 Environmental considerations . 24
10.1 Transmission lines . 24
10.1.1 General . 24
10.1.2 EMF . 24
10.1.3 Electrostatic induction. 24
10.1.4 Electromagnetic induction . 25
10.1.5 Audible noise with corona discharge . 25
10.1.6 Radio interference with corona discharge . 25
10.1.7 Wind noise . 25
10.1.8 Environmental impact . 25
10.2 Substations . 25
10.2.1 Earthing design . 25
10.2.2 Electrostatic-induction design . 25
10.2.3 Audible noise mitigation design . 26
10.2.4 Disaster-prevention design . 26
Bibliography . 27

Figure 1 – Bus scheme . 16
Figure 2 – General method of commissioning on site . 22
Figure 3 – Basic way of considering operation and maintenance of UHV AC
substations . 24

Table 1 – AC three-phase systems having a highest voltage for equipment exceeding
800 kV . 10
Table 2 – Comparison of lightning fault between UHV and 550 kV systems . 10

– 4 – IEC TR 63042-100:2016 © IEC 2016
Table 3 – Substation switchgears’ comparison (GIS, Hybrid-IS, and AIS) . 17
T
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