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IEC 61803
Edition 2.0 2020-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Determination of power losses in high-voltage direct current (HVDC) converter
stations with line-commutated converters
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IEC 61803
Edition 2.0 2020-10
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Determination of power losses in high-voltage direct current (HVDC) converter
stations with line-commutated converters
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.200 ISBN 978-2-8322-8970-9
– 2 – IEC 61803:2020 RLV © IEC 2020
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms, definitions and symbols. 6
3.1 Terms and definitions . 7
3.2 Symbols . 8
4 Overview . 9
4.1 General . 9
4.2 Ambient conditions. 9
4.2.1 General . 9
4.2.2 Outdoor standard reference temperature . 9
4.2.3 Coolant standard reference temperature . 10
4.2.4 Standard reference air pressure . 10
4.3 Operating parameters . 10
5 Determination of equipment losses . 11
5.1 Thyristor valve losses . 11
5.1.1 General . 11
5.1.2 Thyristor conduction loss per valve . 11
5.1.3 Thyristor spreading loss per valve . 12
5.1.4 Other conduction losses per valve . 13
5.1.5 DC voltage-dependent loss per valve . 13
5.1.6 Damping loss per valve (resistor-dependent term) . 14
5.1.7 Damping loss per valve (change of capacitor energy term) . 15
5.1.8 Turn-off losses per valve . 15
5.1.9 Reactor loss per valve . 16
5.1.10 Total valve losses . 16
5.1.11 Temperature effects. 16
5.1.12 No-load operation loss per valve . 17
5.2 Converter transformer losses . 17
5.2.1 General . 17
5.2.2 No-load operation losses . 17
5.2.3 Operating losses. 17
5.2.4 Auxiliary power losses . 19
5.3 AC filter losses . 19
5.3.1 General . 19
5.3.2 AC filter capacitor losses . 19
5.3.3 AC filter reactor losses . 20
5.3.4 AC filter resistor losses . 20
5.3.5 Total AC filter losses . 20
5.4 Shunt capacitor bank losses . 20
5.5 Shunt reactor losses . 21
5.6 DC smoothing reactor losses . 21
5.7 DC filter losses . 22
5.7.1 General . 22
5.7.2 DC filter capacitor losses . 22
5.7.3 DC filter reactor losses . 22
5.7.4 DC filter resistor losses . 23
5.7.5 Total DC filter losses . 23
5.8 Auxiliaries and station service losses . 23
5.9 Radio interference/PLC Series filter losses . 24
5.10 Other equipment losses . 25
Annex A (normative informativee) Calculation of harmonic currents and voltages . 31
A.1 Harmonic currents in converter transformers . 31
A.2 Harmonic currents in the AC filters . 31
A.3 Harmonic voltages on the DC side . 32
A.4 DC side harmonic currents in the smoothing reactor . 32
Annex B (informative) Typical station losses . 33
Annex C (informative) HVDC converter station loss evaluation – An illustration . 34
C.1 General . 34
C.2 Loss evaluation under various cases . 35
Bibliography . 37
Figure 1 – Typical high-voltage direct current (HVDC) equipment for one pole (auxiliary
equipment is not shown) . 26
Figure 2 – Simplified three-phase diagram of an HVDC 12-pulse converter . 27
Figure 3 – Simplified equivalent circuit of a typical thyristor valve . 27
Figure 4 – Current and voltage waveforms of a valve operating in a 12-pulse converter
(commutation overshoots are not shown) . 28
Figure 5 – Thyristor on-state characteristic . 29
Figure 6 – Conduction current and voltage drop . 29
Figure 7 – Distribution of commutating inductance between L and L . 30
1 2
Figure 8 – Thyristor current during reverse recovery . 30
Table B.1 – Typical values of losses . 33
Table C.1 – Conditions for calculation of losses in case D1 . 36
Table C.2 – Conditions for calculation of losses in Case D2. . 36
– 4 – IEC 61803:2020 RLV © IEC 2020
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
DETERMINATION OF POWER LOSSES IN HIGH-VOLTAGE
DIRECT CURRENT (HVDC) CONVERTER STATIONS WITH
LINE-COMMUTATED CONVERTERS
FOREWORD
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