IEC TS 63042-201:2018

IEC TS 63042-201 ®
Edition 1.0 2018-12
TECHNICAL
SPECIFICATION
colour
inside
UHV AC transmission systems –
Part 201: UHV AC substation design
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IEC TS 63042-201 ®
Edition 1.0 2018-12
TECHNICAL
SPECIFICATION
colour
inside
UHV AC transmission systems –
Part 201: UHV AC substation design

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.01; 29.240.10 ISBN 978-2-8322-6330-3

– 2 – IEC TS 63042-201:2018 © IEC 2018
CONTENTS
FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 UHV AC substation requirement . 10
4.1 General requirement . 10
4.2 System demands . 10
4.3 Operation and maintenance requirements . 11
4.4 Construction requirements . 11
4.5 Site condition . 11
4.6 Environmental impact. 12
4.7 Economy . 12
5 Bus scheme and feeder connection . 12
5.1 General . 12
5.2 Scheme at high-voltage side of main transformer . 13
5.3 Scheme at intermedium-voltage side of main transformer . 14
5.4 Scheme at low-voltage side of main transformer . 14
5.5 System neutral earthing mode of a UHV AC substation . 15
6 Selection of equipment and conductors . 16
6.1 General . 16
6.1.1 Voltage . 16
6.1.2 Rated current . 16
6.1.3 Rated frequency . 16
6.2 Basic requirements . 16
6.2.1 Electrical requirements . 16
6.2.2 Mechanical requirements . 17
6.2.3 Environmental conditions . 17
6.3 Transformer . 18
6.4 UHV shunt reactor and neutral-earthing reactor . 19
6.5 UHV switchgear . 19
6.6 UHV circuit breaker . 20
6.7 UHV disconnector . 20
6.8 UHV earthing switch for maintenance . 21
6.9 High-speed earthing switch . 22
6.10 UHV current transformer . 22
6.11 UHV voltage transformer . 22
6.12 UHV surge arrester . 23
6.13 Reactive power compensation device for low voltage side of UHV
transformer . 23
6.14 UHV bushing . 23
6.15 UHV insulator . 24
6.16 UHV conductor. 24
6.16.1 General . 24
6.16.2 Conductor type . 24
6.16.3 Selection of current-carrying capacity (cross-section) . 25
6.16.4 Corona and radio interference . 25
6.16.5 Mechanical strength. 26

7 Equipment layout . 26
7.1 General requirement of equipment layout . 26
7.1.1 General . 26
7.1.2 Optimization of substation layout . 26
7.1.3 Seismic performance . 26
7.1.4 Construction, serviceability and reliability and failure response ability. 26
7.2 Minimum clearances . 27
7.2.1 Normal environmental conditions . 27
7.2.2 Minimum clearances in air-voltage range . 27
7.3 Electromagnetic environment . 27
7.3.1 Electrostatic induction mitigation design . 27
7.3.2 Magnetic induction mitigation design . 28
7.3.3 Audible noise mitigation design . 28
7.4 Selection of switchgear equipment . 29
7.5 Switchgear Installations layout . 29
7.5.1 General . 29
7.5.2 Location arrangement of switchgear . 29
7.5.3 Basic arrangement of surge arresters . 30
7.5.4 Optimal gas-insulated busbar (GIB) layout and length . 30
7.5.5 Utilization of working space for substations . 30
7.6 Protection against direct lightning strike . 31
7.7 Earthing systems . 31
7.7.1 General considerations . 31
7.7.2 Multiple point earthing method for GIS . 32
7.8 Seismic design . 33
7.8.1 General . 33
7.8.2 Basic seismic design . 33
7.8.3 Special seismic performance for UHV AC substation equipment . 34
8 Control, protection and communication . 35
8.1 General . 35
8.2 Control system . 35
8.3 Relay protection . 36
8.3.1 General . 36
8.3.2 Duplicated configuration of UHV AC equipment relay protection . 36
8.3.3 UHV transformer protection . 36
8.4 Communication . 37
8.5 Electromagnetic compatibility requirements for control and protection

equipment . 37
9 DC and AC auxiliary power supply system . 38
9.1 General . 38
9.2 DC power supply system . 38
9.3 AC auxiliary power supply system . 38
9.4 AC uninterruptible power supply (UPS) system . 39
10 UHV gantry, support and foundation design . 39
10.1 UHV gantry and support design . 39
10.1.1 General . 39
10.1.2 Load and combination of loads . 39
10.1.3 Detailing requirements . 40
10.2 GIS or MTS foundation design . 41
...