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BSI PD IEC/TS 63014-1:2018

BSI PD IEC/TS 63014-1:2018

$215.11

High voltage direct current (HVDC) power transmission. System requirements for DC-side equipment – Using line-commutated converters

Published By Publication Date Number of Pages
BSI 2018 90
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This Technical Specification is intended to provide an overall and consistent set of guidelines to facilitate the specification of equipment for the DC-side of a high-voltage direct current (HVDC) system using line-commutated converters. For point-to-point HVDC transmission systems, this document covers all DC-side equipment located between the converter valves and the DC overhead line or cable termination, excluding the converter valves themselves. For back-to-back HVDC systems, this document covers all DC-side equipment excluding the converter valves themselves. Throughout this publication, the terms ‘direct voltage’ and ‘DC voltage’ are used interchangeably, as are ‘direct current’ and ‘DC current’.

Traditionally, the largest items of such equipment, such as the DC smoothing reactor and DC harmonic filters, have generally been located outdoors but increasingly the trend is to locate such equipment indoors (although not in the valve hall itself) to provide protection from pollution. Although product standards exist for some DC-side equipment types, many such items of equipment have only standards written for AC applications and, in such cases, the purpose of this document is to provide guidance as to how to specify the additional requirements (particularly with regard to testing) for such equipment to cover their use in DC conditions.

The converter itself is excluded from this scope, being covered by IEC 60700-1 [1] 1 and IEC 60700-2 [2].

Although this document includes requirements for DC disconnectors and certain types of specialised DC switching devices (such as the Metallic Return Transfer Switch (MRTS)), it excludes any type of DC circuit-breaker designed to interrupt fault currents.

DC-side equipment for HVDC systems based on voltage-sourced converter (VSC) technology is excluded from this document and will be covered in a future Part 2 of IEC 63014.

PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
8 FOREWORD
10 1 Scope
2 Normative references
12 3 Terms and Definitions
3.1 DC switching devices
3.1.1 Types of DC switching device
13 3.1.2 Applications of DC switching devices
14 3.2 Filter components
3.2.1 Filter capacitors
3.2.2 Filter resistors
3.3 Surge arresters
15 4 General
4.1 Overview
16 Figures
Figure 1 – Scope of DC-side equipment for a back-to-back HVDC converter station with one 12-pulse bridge per end
17 Figure 2 – Scope of DC-side equipment for a transmission HVDC converter station with one 12-pulse bridge per pole
18 4.2 Environmental conditions
4.3 Choice of indoor versus outdoor DC yard
19 5 DC smoothing reactors
6 DC switching devices
6.1 High-speed DC switches
6.1.1 General
20 6.1.2 Comparison of operating duties
21 6.1.3 Ratings
Tables
Table 1 – Summary of main parameters affectingspecification of high-speed DC switches
22 Table 2 – Table of standard ratings in accordance with IEC 62271-100 and their applicability to high-speed DC switches
25 6.1.4 Tests
26 Figure 3 – Key for application of test voltages
27 Table 3 – Test conditions for direct voltage test
Table 4 – Test conditions for partial discharge test
28 Table 5 – Test conditions for polarity reversal test
29 Table 6 – Test conditions for RIV test
30 Table 7 – Test conditions for lightning-impulse withstand test
31 Table 8 – Test conditions for switching impulse withstand test
Table 9 – Test conditions for power frequency withstand test
32 6.1.5 Special test on current commutation capability
33 Figure 4 – Test circuit for commutation test
34 6.2 DC disconnectors and earthing switches
6.2.1 General
6.2.2 Ratings
Table 10 – Table of standard ratings in accordance with IEC 62271-102 and their applicability to HVDC disconnectors and earthing switches
37 7 DC GIS
7.1 General
7.2 DC GIS configuration (components of DC GIS)
8 DC filter components
8.1 General
38 8.2 Main DC filter capacitor
8.2.1 General
8.2.2 Design requirements for DC capacitors
Figure 5 – Typical arrangement of shunt DC filter
39 8.2.3 Rated voltage
8.2.4 Base voltage for creepage calculation
40 8.2.5 Tests for DC capacitors
43 8.3 Filter resistors
8.3.1 General
8.3.2 Technical data
44 Table 11 – Ratings for resistors
45 8.3.3 Design aspects
Figure 6 – Typical scheme of a resistor composed of one module
48 Table 12 – Recommended temperature and temperature rise limits for bolted and welded connections
49 8.3.4 Maintenance
8.3.5 Tests
53 8.4 Filter reactors
Figure 7 – Transient current performance of resistor
54 8.5 Auxiliary capacitors
8.5.1 General
8.5.2 Rated voltage of the auxiliary capacitor banks
8.5.3 Base voltage for creepage calculation for auxiliary DC filter capacitors
8.6 Series blocking filters
55 8.7 DC neutral bus capacitor
9 Coupling capacitors and line traps for power line carrier (PLC)
10 DC surge arresters
10.1 General
10.2 Surge arrester specification
10.2.1 General
56 10.2.2 Continuous operating voltage (COV)
10.2.3 Protective characteristics
Figure 8 – Operating voltage of a converter bus arrester (CB), rectifier operation
57 10.2.4 Insulation withstand levels of arrester housing
10.2.5 Energy dissipation capability
10.3 Test requirements
11 Instrument transformers
11.1 DC current transformer
11.2 DC voltage transformer
11.3 Current transformers in DC filter circuits
12 DC insulators and bushings
12.1 Bushings
58 12.2 Post insulators
12.2.1 General
12.2.2 Type tests
60 12.2.3 Routine tests
12.2.4 Special tests (subject to agreement between the manufacturer and the purchaser)
12.3 Suspension insulators
13 Monitoring equipment for electrode line or dedicated metallic return
61 Annex A (informative)Overview of DC-side equipment
A.1 General
Figure A.1 – Main items of DC yard equipment for a typical HVDC transmission scheme
62 A.2 DC smoothing reactor
63 A.3 Filter equipment
A.3.1 DC harmonic filters
64 Figure A.2 – Some commonly used DC filter configurations
65 A.3.2 Series DC blocking filters
66 A.4 DC bushings
Figure A.3 – Series blocking filter
67 A.5 Instrument transformers
A.5.1 General
A.5.2 Direct voltage measurement
Figure A.4 – Resistive voltage divider for measurement of direct voltage
68 A.5.3 DC current measurement
69 Figure A.5 – Operating principle of zero-flux CT (simplified)
70 Figure A.6 – Current measurement by resistive shunt using optical powering
Figure A.7 – Optical current measurement
71 A.6 Surge arresters
73 Figure A.8 – Typical arrangement of surge arresters in a converter stationwith one 12-pulse bridge per pole (only one pole shown)
74 A.7 Electrode line monitoring and protection equipment
75 Figure A.9 – Electrode line monitoring by AC current injection
76 Annex B (informative)DC switching devices for HVDC converter stations
B.1 General
77 Figure B.1 – Typical arrangement of DC switching devices for a bipolar transmission scheme with one 12-pulse bridge per pole
78 B.2 Typical DC switching device applications
B.2.1 Metallic return transfer switch (MRTS) and earth return transfer switch (ERTS)
Figure B.2 – Typical arrangement of bypass switches and disconnectorsfor a bipolar transmission scheme with two 12-pulse bridges per pole
Figure B.3 – Example arrangement of line paralleling switches for a bipolar HVDC transmission scheme
80 B.2.2 Neutral bus switch (NBS)
Table B.1 – Summary of main parameters affecting specification of MRTS and ERTS
81 B.2.3 Neutral bus earthing switch (NBES)
Table B.2 – Summary of main parameters affecting specification of NBS
82 B.2.4 Bypass switch (BPS)
Table B.3 – Summary of main parameters affecting specification of NBES
83 B.2.5 Converter paralleling switch
Table B.4 –Summary of main parameters affecting specification of BPS
84 B.2.6 Line paralleling switch
Figure B.4 – Example arrangement of converter paralleling switches for a bipolar HVDC transmission scheme
Table B.5 – Summary of main parameters affecting specification of CPS
85 B.3 Design
Table B.6 – Summary of main parameters affecting specification of LPS
86 Figure B.5 – Commutation switch based on the divergent current oscillation method, without (left) and with (right) making switch
87 Figure B.6 – Oscillogram of a commutation event
88 Figure B.7 – Commutation switch with pre-charged capacitor
Figure B.8 – Parallel arrangement of switches used at very high current
89 Bibliography

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