IEC TR 63262:2019

IEC TR 63262 ®
Edition 1.0 2019-09
TECHNICAL
REPORT
colour
inside
Performance of unified power flow controller (UPFC) in electric power systems

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IEC TR 63262 ®
Edition 1.0 2019-09
TECHNICAL
REPORT
colour
inside
Performance of unified power flow controller (UPFC) in electric power systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200; 29.240.99 ISBN 978-2-8322-7393-7

– 2 – IEC TR 63262:2019 © IEC 2019
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 8
3 Terms, definitions and symbols. 9
Terms and definitions . 9
Symbols . 10
4 Principles and configurations . 11
Basic principles . 11
UPFC configurations . 12
4.2.1 Basic structure. 12
4.2.2 UPFC configuration in single transmission line . 13
4.2.3 UPFC configuration in double transmission lines . 13
4.2.4 UPFC configuration in multiple transmission lines . 15
5 Design rules . 15
Proposal selection . 15
Parameter selection and coordination . 15
6 Performance requirements for key equipment . 16
General . 16
Voltage sourced converters (VSCs) . 16
6.2.1 General . 16
6.2.2 Three-level converters . 16
6.2.3 Modular multi-level converters (MMCs) . 17
Series transformer . 18
6.3.1 General . 18
6.3.2 Winding connection mode . 18
6.3.3 Insulation level . 19
6.3.4 Short circuit capability . 20
6.3.5 Over-excitation tolerance . 20
6.3.6 DC biasing . 20
Shunt transformer . 20
6.4.1 General . 20
6.4.2 Winding connection . 20
6.4.3 On-load voltage regulation . 21
6.4.4 DC biasing . 21
6.4.5 Harmonics and over-excitation tolerance . 21
Fast bypass switch (FBS) . 22
7 Control and protection . 22
Control system of UPFC. 22
7.1.1 Basic requirement . 22
7.1.2 Configuration requirements . 23
7.1.3 Functions of control system . 23
Protection system of UPFC . 24
7.2.1 Basic requirements . 24
7.2.2 Configuration requirements . 24
7.2.3 Functions of protection system . 24

Requirements on UPFC monitoring system . 25
Requirements on communication interfaces . 26
8 Insulation co-ordination . 26
Principles of insulation co-ordination . 26
8.1.1 General . 26
8.1.2 Insulation co-ordination procedure . 26
8.1.3 Arrester protective scheme . 27
Voltages and overvoltages in service . 27
8.2.1 Maximum operating voltage . 27
8.2.2 Sources of overvoltages . 28
Determination of the required withstand voltages (Urw) . 28
9 System performance . 30
General . 30
Steady-state performance . 30
9.2.1 General . 30
9.2.2 Steady state control requirement of transmission line power . 30
9.2.3 Steady state control requirement of reactive power compensation and
voltage control . 30
9.2.4 Overload capacity requirement . 30
Dynamic performance . 30
Fault ride-through performance . 31
10 Tests . 31
General . 31
Off-site tests of main components . 31
10.2.1 Converter valve . 31
10.2.2 Fast bypass switch (FBS) . 32
10.2.3 Transformers . 32
Onsite commissioning test . 33
10.3.1 General . 33
10.3.2 Converter energizing test . 33
10.3.3 Energizing test of series transformer . 34
10.3.4 UPFC initial operational tests . 34
10.3.5 Steady-state performance test . 34
10.3.6 Dynamic performance test . 34
10.3.7 Protection trip test . 34
10.3.8 Additional control function test . 34
10.3.9 Overload test . 34
10.3.10 Fault ride-through test of AC system . 34
Annex A (informative)  Examples of typical UPFC projects . 35
A.1 Inez UPFC project structure of U.S.A. . 35
A.2 Kangjin UPFC project structure of South Korea . 35
A.3 Marcy UPFC project structure of U.S.A. . 36
A.4 Nanjing UPFC project structure of China . 36
A.5 Shanghai UPFC project structure of China . 37
A.6 Suzhou UPFC project structure of China . 37
A.7 Other information for typical UPFC projects . 38
A.8 Technical and economic evaluation for UPFC projects . 38
Annex B (informative) The difference between UPFC and other FACTS . 39

– 4 – IEC TR 63262:2019 © IEC 2019
Bibliography . 40

Figure 1 – UPFC used in a two-terminal transmission system . 11
Figure 2 –UPFC power flow schematic diagram . 12
Figure 3 – UPFC control functions .
...