IEC TR 60919-1:2005

TECHNICAL IEC
REPORT TR
60919-1
Second edition
2005-03
Performance of high-voltage direct current (HVDC)
systems with line-commutated converters –
Part 1: Steady-state conditions

Reference number
IEC/TR 60919-1:2005(E)
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TECHNICAL IEC
REPORT TR
60919-1
Second edition
2005-03
Performance of high-voltage direct current (HVDC)
systems with line-commutated converters –
Part 1: Steady-state conditions

 IEC 2005  Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
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PRICE CODE
Commission Electrotechnique Internationale
XC
International Electrotechnical Commission
Международная Электротехническая Комиссия
For price, see current catalogue

– 2 – TR 60919-1  IEC:2005(E)

CONTENTS
FOREWORD.6

1 Scope .8

2 Normative references .10

3 Types of HVDC systems .10

3.1 General .10
3.2 HVDC back-to-back system .11
3.3 Monopolar earth return HVDC system .12
3.4 Monopolar metallic return HVDC system .14
3.5 Bipolar earth return HVDC system.15
3.6 Bipolar metallic return HVDC system.18
3.7 Two 12-pulse groups per pole .20
3.8 Converter transformer arrangements.20
3.9 DC switching considerations .20
3.10 Series capacitor compensated HVDC systems .25
4 Environment information .27
5 Rated power, current and voltage .31
5.1 Rated power.31
5.2 Rated current .31
5.3 Rated voltage .32
6 Overload and equipment capability .32
6.1 Overload .32
6.2 Equipment capability.33
7 Minimum power transfer and no-load stand-by state .34
7.1 General .34
7.2 Minimum current.34
7.3 Reduced direct voltage operation .35
7.4 No-load stand-by state.35
8 AC system.36
8.1 General .36

8.2 AC voltage .36
8.3 Frequency .37
8.4 System impedance at fundamental frequency.38
8.5 System impedance at harmonic frequencies.38
8.6 Positive and zero-sequence surge impedance .38
8.7 Other sources of harmonics .38
8.8 Subsynchronous torsional interaction (SSTI) .38
9 Reactive power.39
9.1 General .39
9.2 Conventional HVDC systems .39
9.3 Series capacitor compensated HVDC schemes .41
9.4 Converter reactive power consumption.41

TR 60919-1  IEC:2005(E) – 3 –

9.5 Reactive power balance with the a.c. system.41

9.6 Reactive power supply.42

9.7 Maximum size of switchable VAR banks.42

10 HVDC transmission line, earth electrode line and earth electrode .42

10.1 General .42

10.2 Overhead line(s).43

10.3 Cable line(s).43

10.4 Earth electrode line .44

10.5 Earth electrode.44

11 Reliability .44
11.1 General .44
11.2 Outage .44
11.3 Capacity.45
11.4 Outage duration terms .45
11.5 Energy unavailability (EU).46
11.6 Energy availability (EA).47
11.7 Maximum permitted number of forced outages .47
11.8 Statistical probability of outages.47
12 HVDC control .48
12.1 Control objectives.48
12.2 Control structure.48
12.3 Control order settings .54
12.4 Current limits.54
12.5 Control circuit redundancy .55
12.6 Measurements.55
13 Telecommunication.55
13.1 Types of telecommunication links.55
13.2 Telephone .56
13.3 Power line carrier (PLC) .56
13.4 Microwave .56
13.5 Radio link .57
13.6 Optical fibre telecommunication .57
13.7 Classification of data to be transmitted.57
13.8 Fast response telecommunication .58
13.9 Reliability .58
14 Auxiliary power supplies .58
14.1 General .58
14.2 Reliability and load classification.59
14.3 AC auxiliary supplies .60
14.4 Batteries and uninterruptible power supplies (UPS) .60
14.5 Emergency supply .61
15 Audible noise .61
15.1 General .61
15.2 Public nuisance .61
15.3 Noise in working areas .62

– 4 – TR 60919-1  IEC:2005(E)

16 Harmonic interference – AC .63

16.1 AC side harmonic generation .63

16.2 Filters.63

16.3 Interference disturbance criteria.67

16.4 Levels for interference .68

16.5 Filter performance .69

17 Harmonic interference – DC.69

17.1 DC side interference.69

17.2 DC filter performance.71

17.3 Specification requirements.
...