IEC 60700-3:2022

IEC 60700-3 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thyristor valves for high voltage direct current (HVDC) power transmission –
Part 3: Essential ratings (limiting values) and characteristics

Valves à thyristors pour le transport d’énergie en courant continu à haute
tension (CCHT) –
Partie 3: Valeurs assignées (valeurs limites) et caractéristiques essentielles

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IEC 60700-3 ®
Edition 1.0 2022-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Thyristor valves for high voltage direct current (HVDC) power transmission –

Part 3: Essential ratings (limiting values) and characteristics

Valves à thyristors pour le transport d’énergie en courant continu à haute

tension (CCHT) –
Partie 3: Valeurs assignées (valeurs limites) et caractéristiques essentielles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.200 ISBN 978-2-8322-6121-7

– 2 – IEC 60700-3:2022 © IEC 2022
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviated terms . 7
3.1 Terms and definitions . 7
3.2 Symbols and abbreviated terms . 8
3.2.1 General . 8
3.2.2 Subscripts . 8
3.2.3 Letter symbols . 8
3.2.4 Abbreviated terms . 9
4 Service conditions . 9
4.1 General . 9
4.2 Environmental conditions . 9
4.2.1 Site altitude . 9
4.2.2 Air temperature and humidity range in valve halls . 9
4.2.3 Cleanness in valve halls . 10
4.2.4 Seismic conditions . 10
4.3 System conditions . 10
4.3.1 General information of the system . 10
4.3.2 AC system voltage . 10
4.3.3 AC system frequency . 10
4.3.4 DC system voltage . 10
4.3.5 DC system current and overload requirements . 11
4.3.6 Short circuit current requirements for thyristor valves . 11
4.3.7 Insulation coordination design related to thyristor valves . 11
4.4 Technical parameters for six-pulse bridge design . 11
4.4.1 General . 11
4.4.2 Voltage parameters . 11
4.4.3 Current parameters. 12
4.4.4 Valve arrester parameters . 13
4.4.5 Other system parameters. 13
4.5 Other conditions. 14
5 Ratings . 14
5.1 Voltage and current ratings (limiting values) . 14
5.1.1 Rated AC voltage across valve (U ) . 14
v0N
5.1.2 Maximum steady state AC voltage across valve (U ) . 14
v0max
5.1.3 Maximum temporary state AC voltage across valve (U ) . 14
v0maxT
5.1.4 Minimum steady state AC voltage across valve (U ) . 15
v0min
5.1.5 Minimum temporary state AC voltage across valve (U ) . 15
v0minT
5.1.6 Valve repetitive peak off-state voltage (U ) . 15
vDRM
5.1.7 Valve non-repetitive peak off-state voltage (U ) . 15
vDSM
5.1.8 Valve repetitive peak reverse voltage (U ) . 15
vRRM
5.1.9 Valve non-repetitive peak reverse voltage (U ) . 15
vRSM
5.1.10 Valve switching impulse withstand voltage (SIWV ) . 15
v
5.1.11 Valve lightning impulse withstand voltage (LIWV ) . 16
v
5.1.12 Valve steep front impulse withstand voltage (STIWV ) . 16
v
5.1.13 Valve switching impulse protective firing voltage (SIPL ) . 16
PF
5.1.14 Valve RMS current (I ) . 16
v(RMS)
5.1.15 Valve average current (I ) . 16
v(av)
5.1.16 Valve one-loop fault current with re-applied forward voltage (I ) . 16
SCα
5.1.17 Valve multiple-loop fault current without re-applied forward voltage
(I ) . 17
SCβ
5.2 Delay and extinction angle ratings (limiting values) . 17
5.2.1 Rated firing delay angle (α ) . 17
N
5.2.2 Minimum allowable firing delay angle (α ) . 17
min
5.2.3 Maximum allowable firing delay angle (α ) . 17
max
5.2.4 Minimum temporary state firing delay angle (α ) . 17
minT
5.2.5 Rated extinction angle (γ ) . 17
N
5.2.6 Minimum allowable extinction angle (γ ). 17
min
5.2.7 Maximum allowable extinction angle (γ ) . 17
max
5.2.8 Minimum temporary state extinction angle (γ ) . 17
minT
5.3 Insulation and test voltage levels (limiting values) . 18
5.3.1 Maximum DC voltage between valve terminals (U ) . 18
d(v)max
5.3.2 Maximum DC voltage across multiple valve unit (U ) . 18
d(m)max
5.3.3 Maximum DC voltage across valve support (U ) . 18
d(vs)max
5.3.4 Maximum AC voltage between valve terminals (U ) . 18
ac(v)max
5.3.5 Maximum AC voltage across multiple valve unit (U ) . 19
ac(m)max
5.3.6 Maximum AC voltage across valve support (U ) . 19
ac(vs)max
5.3.7 Maximum switching impulse voltage between valve terminals
(U ). 19
s(v)max
5.3.8 Maximum switching impulse voltage across multiple valve unit
(U ) . 19
s(m)max
5.3.9 Maximum switching impulse voltage across valve support (U ) . 20
s(vs)max
5.3.10 Maximum lightning impulse voltage between valve terminals (U ) . 20
l(v)max
5.3.11 Maximum lightning impulse voltage across multiple valve unit
(U ) . 20
l(m)max
5.3.12 Maximum lightning impulse voltage across valve support (U ) . 20
l(vs)max
5.3.13 Maximum steep front impulse voltage between valve terminals
(U ) . 20
st(v)ma
...