IEC TR 62672:2018

Reliability and availability evaluation of HVDC systems

IEC TR 62672:2018(E) applies to all line-commutated and voltage-sourced high-voltage direct current (HVDC) transmission systems used for power exchange in utility systems. The purpose of this document is to define a standardized reporting protocol so that data collected from different HVDC transmission systems can be compared on an equitable basis. This document covers point-to-point transmission systems, back-to-back interconnections and multi-terminal transmission systems.

General Information

• Status: Published
• Publication Date: 25-Sep-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.240.01 - Power transmission and distribution networks in general
• Technical Committee: TC 115 - High Voltage Direct Current (HVDC) transmission for DC voltages above 100 kV
• Drafting Committee: WG 2 - TC 115/WG 2
• Current Stage: PPUB - Publication issued
• Start Date: 24-Sep-2018
• Completion Date: 26-Sep-2018

Relations

• Replaces: IEC TS 62672-1:2013 - Reliability and availability evaluation of HVDC systems - Part 1: HVDC systems with line commutated converters
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC TR 62672 ®
Edition 1.0 2018-09
TECHNICAL
REPORT
Reliability and availability evaluation of HVDC systems

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IEC TR 62672 ®
Edition 1.0 2018-09
TECHNICAL
REPORT
Reliability and availability evaluation of HVDC systems

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.240.01 ISBN 978-2-8322-6065-4

– 2 – IEC TR 62672:2018  IEC 2018
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, abbreviated terms and symbols . 7
3.1 Outage terms . 8
3.2 Capacity terms . 8
3.3 Outage duration terms . 9
3.4 Time categories . 9
3.5 Availability and utilization terms . 10
3.6 Commutation failure performance terms . 11
3.7 Abbreviated terms and symbols . 11
4 Classification of HVDC transmission system equipment . 12
4.1 General . 12
4.2 AC and auxiliary equipment (AC-E) . 13
4.2.1 General . 13
4.2.2 AC filter and other reactive power equipment (AC-E.F) . 13
4.2.3 AC control and protection (AC-E.CP) . 13
4.2.4 Converter/interface transformer (AC-E.TX) . 13
4.2.5 Synchronous compensator (AC-E.SC) . 13
4.2.6 Auxiliary equipment and auxiliary power (AC-E.AX) . 14
4.2.7 Other AC switchyard equipment (AC-E.SW) . 14
4.3 Valves (V) . 14
4.3.1 General . 14
4.3.2 Valve electrical (V.E) . 14
4.3.3 Valve cooling (V.VC) . 14
4.3.4 Valve capacitor (V.C) . 14
4.3.5 Phase reactor (V.PR) . 14
4.4 DC control and protection equipment (C-P) . 14
4.4.1 General . 14
4.4.2 Local control and protection (C-P.L) . 15
4.4.3 Master control and protection (C-P.M) . 15
4.4.4 Telecommunication equipment (C-P.T) . 15
4.5 Primary DC equipment (DC-E) . 15
4.5.1 General . 15
4.5.2 DC filters (DC-E.F) . 15
4.5.3 DC smoothing reactors (DC-E.SR) . 15
4.5.4 DC switching equipment (DC-E.SW) . 15
4.5.5 DC measuring equipment (DC-E.ME) . 16
4.5.6 DC earth electrode (DC-E.GE) . 16
4.5.7 DC earth electrode line (DC-E.EL) . 16
4.5.8 Other DC switchyard and valve hall equipment (DC-E.O) . 16
4.6 Other (O) . 16
4.7 DC transmission line (TL). 16
4.7.1 General . 16
4.7.2 DC overhead transmission line (TL-OH) . 16
4.7.3 DC underground/submarine cable (TL-C) . 17

4.8 External (EXT) . 17
5 Classification and severity of fault events and restoration codes . 17
5.1 Classification of fault events . 17
5.2 Severity codes . 18
5.3 Restoration codes . 19
6 Instructions for compilation of report . 19
6.1 General . 19
6.2 General instructions . 19
6.3 Instructions for Table 2 and Table 3 . 20
6.3.1 Section 1 . 20
6.3.2 Section 2 . 20
6.3.3 Sections 3, 4 and 5 . 20
6.3.4 Section 6 . 21
6.3.5 Section 7 . 21
6.4 Instructions for Table 4 and Table 5 . 24
6.4.1 Forced outages – Table 4 . 24
6.4.2 Scheduled outages – Table 5 . 24
6.5 Instructions for Table 6 . 26
6.6 Instructions for Table 7 . 27
6.7 Instructions for Table 8 . 28
6.8 Instructions for Table 9 . 29
7 Interpretation and evaluation of reports . 29
7.1 Calculation of outage duration . 29
7.2 External events . 29
7.3 Protective operation . 30
7.4 Performance of special controls . 30
Annex A (informative) Outage log form and examples . 33
A.1 Example of an outage log . 33
A.2 Examples of application of rule f) of 6.3.3 – Scheduled outage during a
forced outage . 34
A.2.1 Case 1: Scheduled outage does not increase ODF or extends outage
duration . 34
A.2.2 Case 2: Scheduled outage increases ODF . 35
A.3 Examples of application of rule g) of 6.3.3 – Second outage during an
outage . 36
A.3.1 Case 1: Second outage does not increase ODF or extends outage
duration . 36
A.3.2 Case 2: Second outage extends duration . 37
A.3.3 Case 3: Second outage with variable ODF . 38
Annex B (informative) Sample annual report . 39
Bibliography . 45

Figure A.1 – Scheduled outage does not increase ODF or extends outage duration . 35
Figure A.2 – Scheduled outage increases ODF . 35
Figure A.3 – Second outage does not increase ODF or extends outage duration . 36
Figure A.4 – Second outage extends duration . 37
Figure A.5 – Second outage with variable ODF . 38

– 4 – IEC TR 62672:2018  IEC 2018
Table 1 – Classification of fault events . 18
Table 2 – DC system performance for back-to-back systems and for two-terminal
systems reporting jointly (corresponding to Table 1 of Cigré TB 590:2014) . 22
Table 3 – DC system performance for multi-terminal systems and for stations reporting
separately as part of two-terminal systems (corresponding to Table 1 M/S of Cigré TB
590:2014) .
...