IEC TR 63262:2019

Performance of unified power flow controller (UPFC) in electric power systems

IEC TR 63262:2019(E) provides guidelines for applying unified power flow controllers (UPFC) in power systems. It includes letter symbols, terms and definitions, principles and configurations, design rules, performance requirements for key equipment control and protection, insulation co-ordination, system performance and tests. This technical report applies to the UPFC based on modular multi-level converter (MMC) technology, as well as UPFC based on three-level converter technology.

General Information

• Status: Published
• Publication Date: 12-Sep-2019
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.200 - Rectifiers. Convertors. Stabilized power supply
• ICS: 29.240.99 - Other equipment related to power transmission and distribution networks
• Technical Committee: SC 22F - Power electronics for electrical transmission and distribution systems
• Drafting Committee: MT 36 - TC 22/SC 22F/MT 36
• Current Stage: PPUB - Publication issued
• Start Date: 08-Oct-2019
• Completion Date: 13-Sep-2019

Standards Content (Sample)

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 .
...