IEC TR 63368:2024

IEC TR 63368 ®
Edition 1.0 2024-09
TECHNICAL
REPORT
colour
inside
Control and protection systems for high-voltage direct current (HVDC) power
transmission systems – Off-site real-time simulation testing

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IEC TR 63368 ®
Edition 1.0 2024-09
TECHNICAL
REPORT
colour
inside
Control and protection systems for high-voltage direct current (HVDC) power

transmission systems – Off-site real-time simulation testing

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.99  ISBN 978-2-8322-9712-4

– 2 – IEC TR 63368:2024 © IEC 2024
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
3.1 Terms and definitions . 7
3.2 Abbreviated terms . 7
4 Test environment . 8
4.1 General . 8
4.2 Real-time simulator . 8
4.2.1 General . 8
4.2.2 Simulation interface devices . 8
4.2.3 Simulation model . 9
4.3 HVDC control and protection devices . 11
4.3.1 Control devices . 11
4.3.2 Protection devices . 11
4.3.3 Measurement devices . 12
4.3.4 Monitoring devices . 12
4.3.5 Fault recording devices . 12
4.3.6 Valve base control devices . 12
5 Steady state control tests . 12
5.1 General . 12
5.2 DC switching sequence tests . 13
5.3 Energization of reactive power components . 13
5.4 Energization of converter transformers. 13
5.5 Open line test of HVDC control system . 13
5.6 Deblock-block performance tests . 13
5.7 Operator control mode transfer tests . 14
5.8 Operation status tests . 14
5.9 Tap changer control tests. 14
5.10 Reactive power control tests . 14
5.10.1 Reactive power component switching function tests . 14
5.10.2 Reactive power curve tests . 14
5.11 Power ramping tests . 15
5.12 Overload tests . 15
5.13 Metallic and ground return configuration and transfer tests . 15
5.14 Reduced voltage operation tests . 15
5.15 Tests of static characteristic curves of converters . 15
5.16 PQ diagram tests of VSC-HVDC converters . 15
6 Dynamic control tests . 16
6.1 General . 16
6.2 Power step test . 16
6.3 Current step test . 16
6.4 Voltage step test . 16
6.5 Gamma step test . 17
6.6 AC system related tests . 17

6.6.1 AC disturbance tests . 17
6.6.2 AC/DC interaction tests . 17
6.7 Stability control function tests . 18
6.8 Power system restoration test . 18
6.9 Grid code tests . 18
7 Protection tests . 19
7.1 General . 19
7.2 Trip signal logic tests . 19
7.3 Converter unit area protection tests . 19
7.4 DC bus area protection tests . 19
7.5 DC filter area protection tests . 20
7.6 DC line area protection tests . 20
7.7 Switch protection tests . 20
7.8 Other protection tests . 20
8 Redundancy and reliability of control and protection system tests . 21
8.1 General . 21
8.2 Redundant system failure tests . 21
8.3 System monitoring and switching tests . 21
8.4 Electromagnetic interference tests (optional) . 22
8.5 IT security . 22
9 Special tests for VSC . 23
9.1 General . 23
9.2 Control system delay (optional) . 23
9.3 Valve control and protection function tests . 23
9.3.1 Valve control function test . 23
9.3.2 Valve protection function tests . 24
9.4 STATCOM tests . 24
10 Test report . 24
Annex A (informative) Examples of protection areas and faults . 25
Annex B (informative) A typical test method for control system delay . 28
Bibliography . 30

Figure 1 – Relationship between clauses and test phases. 6
Figure A.1 – Typical faults in a LCC HVDC substation
(IEC/TR 60919-2:2008/AMD1:2015, Figure 7) . 26
Figure A.2 – Typical faults in a VSC HVDC substation (example – symmetrical
monopole shown in single phase) . 27
Figure B.1 – Composition of control system delay . 28
Figure B.2 – The real-time simulation test scheme for control system delay . 29

– 4 – IEC TR 63368:2024 © IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONTROL AND PROTECTION SYSTEMS FOR HIGH-VOLTAGE DIRECT
CURRENT (HVDC) POWER TRANSMISSION SYSTEMS –
OFF-SITE REAL-TIME SIMULATION TESTING

FOREWORD
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...