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Main Technical Data of UHV DC Electrical Equipment1
Appendix C
Main Technical Data of UHV DC Electrical Equipment1 Table C.1: Converter Valves. Main Technical Data
Unit Value
1. DC current ratings Nominal DC current IdN Minimum continuous operating DC current Maximum continuous operating DC current (rated transmission power, maximum ambient temperature, 50 C valve hall temperature, without redundant cooling in service) Maximum continuous operating DC current (1.1 p.u. of rated transmission power, maximum ambient temperature, 50 C valve hall temperature, with redundant cooling in service) Maximum current when operated with 1.4 p.u. overload for 3 s (maximum ambient temperature, 50 C valve hall temperature)
A A A
4000 367 4037
A
4497
A
kV kV
800 816
2. DC voltage ratings Nominal pole-to-neutral DC voltage UdRN Maximum continuous pole-to-neutral DC voltage under rated operation (including errors) Nominal no-load DC voltage UdioN Maximum no-load DC voltage Udioabsmax (design value) Load rejection factor at temporary overvoltage (valve blocked)
kV 230.0 kV 237.6 p.u. 1.4
3. Transient current of thyristor valve Peak short-circuit current of a single valve (αmin 5 5 , f 5 49.8 Hz, followed by blocking) Recovery time with follow-up blocking
kA
43.9
ms
2.12
kV kV
450/426 1600/1800
4. Insulation level Valve (SIWL/LIWL) Upper 12-pulse bridge’s DC bus-to-ground insulation level (SIWL/LIWL)
1
The technical data in this appendix are parameters of the main equipment in converter stations in the XiangjiabaShanghai project.
697
698 Appendix C Table C.2: Six-Inch Thyristors. Main Technical Data
Average Symbols Unit SCR
Worst SCR
Rated SCR
Test Conditions
Continuous off-state DC voltage
VD
V
7020 (1 min)
Peak off-state voltage
VDM
V
4953
5585
6423
Off-state operating voltage (peak)
VDWM
V
4953
5585
6423
Repetitive peak off-state voltage
VDRM
V
6017
6019
7900
7675
Non-repetitive peak off-state voltage
VDSM
V
8257
8500
8500
8500
Forward breakover voltage (DC)
V(BO)
V
8257
8500
8500
Continuous on-state voltage (DC)
VT
V
1.81
1.94
1.97
Continuous reverse voltage (DC)
VR
V
7020 (1 min)
Peak reverse voltage (crest)
VRWM
V
4953
5585
6423
Repetitive peak reverse voltage
VRRM
V
6017
7001
7900
7675
Non-repetitive peak reverse voltage
VRSM
V
6750
7611
8500
8198
Continuous on-state current (DC)
IT
A
4500
4542
4200
4500
On-state overload current
I(OV)
A
5934
Surge (non-repetitive) on-state current
ITSM
A
45,800
46,000
46,000
Table C.3: Converter Transformer. Main Technical Data Type
Connection of transformer winding (after three phases are connected) Rated voltage ratio
HV End Y/Y
LV End Y/Y
HV End Y/Δ
LV End Y/Δ
Forced-oil and air cooled, oil-immersed type single-phase two-winding transformer with on-load tap changer YNy
YNd11
pffiffiffi pffiffiffi (530/ 3)/(170.3/ 3)
pffiffiffi (530/ 3)/170.3
Cooling method
ODAF
Rated capacity (MVA)
321.1
Average temperature rise under operation at rated capacity (K)
55
Hot-spot temperature rise under operation at rated capacity (K)
68
Top oil temperature rise (K)
50
Short-circuit impedance of main tap (%)
18 (Continued )
Main Technical Data of UHV DC Electrical Equipment 699 Table C.3: (Continued) HV End Y/Y
Main Technical Data Insulation level (kV)
Lightning impulse
HV End Y/Δ
500 kV side
1550
Line side neutral
200
Valve side Chopped lightning impulse
500 kV side
Switching impulse
500 kV side
Valve side
Valve side Noise
LV End Y/Y
1800
1300
1550
1175
1705 1980
1430
1705
1293
1175 1600
1175
1300
Under rated power frequency voltage (dB(A))
75
Rated current (A)
1391
Tapping range
2 5 to 123
Tap step (%)
1.25
Tap transfer rate (steps/min)
12
Switching times without maintenance
1 3 105
Electrical life (switching times)
5 3 105
Mechanical life (switching times)
1 3 106
Full lightning impulse withstand voltage (kV)
325
Permissible continuous DC current flowing through neutral of line side winding of each phase’s converter transformer (A)
10
Tap changer
LV End Y/Δ
1050
700 Appendix C Table C.4: Dry-Type Smoothing Reactor. Main Technical Data
Unit Value
Rated inductance
mH
75(1 1 5%)
Nominal rated DC current IdN
A
4000
Maximum continuous operating DC current under 1.10 p.u. of the rated transmitting power
A
4497
Maximum DC current under 2 h overload operation
A
4731
Maximum current when operated at 1.4 p.u. overload for 3 s
A
5909
Transient fault current (peak)
kA
40
Nominal rated pole-to-neutral DC voltage
kV
800
Maximum continuous operating DC voltage under rated operation (including errors)
kV
816
Rated neutral bus voltage
kV
120
Maximum neutral bus voltage
kV
123
Winding temperature rise
Average temperature rise Hot-spot temperature rise
K K
80 105
Insulation level and test voltage (applicable to two series-connected 75 mH devices)
Switching impulse withstand level (peak, between terminals) Switching impulse withstand level (peak, terminal-to-earth) Lighting impulse withstand level (peak, between terminals)
kV
1675
kV
1600
kV
2100
Lightning impulse withstand level (peak) Chopped lightning impulse withstand level (peak, between terminals) DC withstand voltage (kV, DC, 120 min, to ground)
kV
1950
kV
2310
kV
1236
dB
70
Insulation level and test voltage (applicable to two series-connected 75 mH smoothing reactors)
Sound pressure level
Table C.5: Wall Bushings (kV). 6 800 kV Line Pole Bushing
6 400 kV Line Pole Bushing
Rated operating voltage (DC)
800
400
Maximum continuous operating voltage (DC)
816
408
DC withstand voltage (DC)
1224
612
Power frequency withstand voltage
865
433
Lightning impulse withstand level
1800
1300
Switching impulse withstand level
1620
1050
Polarity reversal withstand voltage (DC)
1020
510
Main Technical Data
Main Technical Data of UHV DC Electrical Equipment 701 Table C.6: DC Voltage Measuring Device. Main Technical Data
Unit
Line Pole (Fulong)
Neutral Bus (Fulong)
Nominal DC voltage UdN
kV
8
10
Maximum continuous DC voltage Udmax
kV
816
95
Measuring ranges
kV
1 1200
6 120
Output bus voltage of isolated A/D system
p.u.
1.0
1.0
kV
800
60
DC voltage withstand test (dry) (60 min), simultaneously with polarity reversal and partial discharge test
kV
1224
143
Lightning impulse tests
kV
1950
574
Table C.7: DC Current Measuring Devices. Between Two 12-pulse Converters
Main Technical Data
Unit
Line Pole (in Valve Hall and Outdoor)
Neutral Bus (in Valve Hall and Outdoor)
Converter on HV Side
Converter on Neutral Bus Side
Rated DC current IdN
A
4000
4000
4000
4000
Steady-state DC measuring limit
A
5000
5000
5000
5000
Transient measuring limit
kA
24
24
24
24
Lightning impulse withstand level
kV
2182
450
1800
1175
Switching impulse withstand level
kV
1792
325
1600
950
Measurement accuracy
(0134%) IdN
%
0.5
0.2
0.5
0.2
(134300%) IdN
%
1.5
1.5
1.5
1.5
(300600%) IdN
%
10
10
10
10
Table C.8: DC Arresters. DC Arresters
Valve Arresters
Main Technical Data
Unit
DB
CBH
CBL
V11
V12
V2/V3
Continuous voltage (peak)
kV
824
878
404.5
248.8
248.8
248.8
Continuous voltage with commutation overshoot (peak)
kV
916
496.4
Reference voltage Uc (DC)
kV
969
1070
553
288.4 288.4 295.6 pffiffiffi pffiffiffi pffiffiffi 204 2 204 2 210 2
Maximum residual voltage under steep front current 1000 A (peak) impulse 3000 A (peak)
kV
, 1536 , 1627 , 842
, 420
, 420
, 430
kV
1536
, 1627 , 842
, 420
, 420
, 430
10 kA (peak)
kV
1653
1753
907
432
454
467
20 kA (peak)
kV
1751
1864
964
454
482
497
1000 A (peak)
kV
1381
1453
751
369
376
387
3000 A (peak)
kV
1445
1518
785
380
393
405
10 kA (peak)
kV
1547
1642
849
406
425
437
20 kA (peak)
kV
1621
1731
896
425
448
461
300 A (peak)
kV
1316
1402
725
, 360 363
363
1000 A (peak)
kV
1371
1447
748
368
374
385
3000 A (peak)
kV
1431
1510
781
379
391
402
For a single impulse (4 ms)
kJ/kV
7.0
7.0
7.0
7.0
7.0
7.0
13,500
19,000
10,100 10,300 5100
5300
3
4
4
4
Maximum residual voltage under 8/20 µs current impulse
Maximum residual voltage under 3045/6090 µs current impulse
Energy absorption rating
For the entire surge arrester kJ Number of parallel columns
8
4
Main Technical Data of UHV DC Electrical Equipment 703 Table C.9: DC Transfer Switch. Main Technical Data
Unit
MRTB
GRTS
NBS
NBGS
Rated current
A
4970
4970
4970
Rated voltage
kV
95
95
95
95
Maximum transfer current
A
4330
1200
4970
4970
Maximum transfer voltage (peak)
kV
120
54
55
45
Maximum arcing time if the switch operates successfully
ms
20
20
20
20
1860
262
950
794
The integral of arcing current over time if the switch fails As and recloses LIWL between breaks (dry)
kVcrest 189
85
88
71
LIWL to ground (dry)
kVcrest 574
574
574
574
SIWL between breaks (wet)
kVcrest 138
62
64
52
SIWL to ground (wet)
kVcrest 452
452
452
452
The (maximum) rate of rise of recovery voltage
kV/ ms
280
280
280
280
Normal closing time
ms
50
50
50
50
Normal reclosing time (COC) if the switch fails
ms
430
218
191
160
Operation cycle
OCO OCO COC COC
Number of series poles
2
1
2
2
Rated capacitance
µF
60
22
60
60
Maximum energy absorbed by arrester
kJ
53,050
1270
5570
1700
Nominal inductance
µH
60
Table C.10: Main Technical Data of Other UHV DC Projects. Main Technical Data
Yunnan—Guangdong Project
Haminan—Zhengzhou Project
Xiluodu—Zhejiang Project
DC voltage (kV)
6 800
6 800
6 800
DC current (kA)
3125
5000
5000
DC power (MW)
5000
8000
8000
Transmission distance (km)
1373
2210
1669
Main connection scheme
Each pole having two series connected 12-pulse converter units
Each pole having two series connected 12-pulse converter units
Each pole having two series connected 12-pulse converter units
Converter transformers
Capacity (MVA)
250.21 (Sending end) 244 (Receiving end) Short-circuit impedance 18% (Sending end) 18.5% (Receiving end) Step size 1.25% Number of tap 1 18/ 2 6 (Sending end) positions 1 16/ 2 8 (Receiving end) Type Single-phase two-winding Cooling method ODAF (Sending end) ODAF (Receiving end)
405.13 (Sending end) 376.61 (Receiving end) 20% (Sending end) 19% (Receiving end) 1.25% 1 23/ 2 5 (Sending end) 1 25/ 2 5 (Receiving end) Single-phase two-winding OFAF (Sending end) ODAF (Receiving end)
404 (Sending end) 382 (Receiving end) 19% (Sending end) 19% (Receiving end) 1.25% 1 23/ 2 5 (Sending end) 1 23/ 2 5 (Receiving end) Single-phase two-winding OFAF (Sending end) ODAF (Receiving end)
Converter valves
Size (inch) Valve tower structure
5 Double valve unit
6 Double valve unit
6 Double valve unit
Smoothing reactors
Inductance (mH) Type Arrangement
300 Dry Line pole: 2 3 75 mH Neutral bus: 2 3 75 mH
300 Dry Line pole: 3 3 500 mH Neutral bus: 3 3 500 mH
300 Dry Line pole: 3 3 500 mH Neutral bus: 3 3 500 mH
AC filters/ shunt capacitors
Total compensation capacity (Mvar)
3366 (Sending end) 3010 (Receiving end)
3575 (Sending end) 4940 (Receiving end)
5200 (Sending end) 4879 (Receiving end)
DC filters
Type (for each pole of a 12/24 and 36/48 converter station) Equivalent disturbing Monopolar: 2000 current (mA) Bipolar: 2000
12/24 and 2/39
12/24 and 2/39
Monopolar: 6000 Bipolar: 3000
Monopolar: 6000 Bipolar: 3000
Main Technical Data of UHV DC Electrical Equipment1 Table C.1: Converter Valves. Main Technical Data
Unit Value
1. DC current ratings Nominal DC current IdN Minimum continuous operating DC current Maximum continuous operating DC current (rated transmission power, maximum ambient temperature, 50 C valve hall temperature, without redundant cooling in service) Maximum continuous operating DC current (1.1 p.u. of rated transmission power, maximum ambient temperature, 50 C valve hall temperature, with redundant cooling in service) Maximum current when operated with 1.4 p.u. overload for 3 s (maximum ambient temperature, 50 C valve hall temperature)
A A A
4000 367 4037
A
4497
A
kV kV
800 816
2. DC voltage ratings Nominal pole-to-neutral DC voltage UdRN Maximum continuous pole-to-neutral DC voltage under rated operation (including errors) Nominal no-load DC voltage UdioN Maximum no-load DC voltage Udioabsmax (design value) Load rejection factor at temporary overvoltage (valve blocked)
kV 230.0 kV 237.6 p.u. 1.4
3. Transient current of thyristor valve Peak short-circuit current of a single valve (αmin 5 5 , f 5 49.8 Hz, followed by blocking) Recovery time with follow-up blocking
kA
43.9
ms
2.12
kV kV
450/426 1600/1800
4. Insulation level Valve (SIWL/LIWL) Upper 12-pulse bridge’s DC bus-to-ground insulation level (SIWL/LIWL)
1
The technical data in this appendix are parameters of the main equipment in converter stations in the XiangjiabaShanghai project.
697
698 Appendix C Table C.2: Six-Inch Thyristors. Main Technical Data
Average Symbols Unit SCR
Worst SCR
Rated SCR
Test Conditions
Continuous off-state DC voltage
VD
V
7020 (1 min)
Peak off-state voltage
VDM
V
4953
5585
6423
Off-state operating voltage (peak)
VDWM
V
4953
5585
6423
Repetitive peak off-state voltage
VDRM
V
6017
6019
7900
7675
Non-repetitive peak off-state voltage
VDSM
V
8257
8500
8500
8500
Forward breakover voltage (DC)
V(BO)
V
8257
8500
8500
Continuous on-state voltage (DC)
VT
V
1.81
1.94
1.97
Continuous reverse voltage (DC)
VR
V
7020 (1 min)
Peak reverse voltage (crest)
VRWM
V
4953
5585
6423
Repetitive peak reverse voltage
VRRM
V
6017
7001
7900
7675
Non-repetitive peak reverse voltage
VRSM
V
6750
7611
8500
8198
Continuous on-state current (DC)
IT
A
4500
4542
4200
4500
On-state overload current
I(OV)
A
5934
Surge (non-repetitive) on-state current
ITSM
A
45,800
46,000
46,000
Table C.3: Converter Transformer. Main Technical Data Type
Connection of transformer winding (after three phases are connected) Rated voltage ratio
HV End Y/Y
LV End Y/Y
HV End Y/Δ
LV End Y/Δ
Forced-oil and air cooled, oil-immersed type single-phase two-winding transformer with on-load tap changer YNy
YNd11
pffiffiffi pffiffiffi (530/ 3)/(170.3/ 3)
pffiffiffi (530/ 3)/170.3
Cooling method
ODAF
Rated capacity (MVA)
321.1
Average temperature rise under operation at rated capacity (K)
55
Hot-spot temperature rise under operation at rated capacity (K)
68
Top oil temperature rise (K)
50
Short-circuit impedance of main tap (%)
18 (Continued )
Main Technical Data of UHV DC Electrical Equipment 699 Table C.3: (Continued) HV End Y/Y
Main Technical Data Insulation level (kV)
Lightning impulse
HV End Y/Δ
500 kV side
1550
Line side neutral
200
Valve side Chopped lightning impulse
500 kV side
Switching impulse
500 kV side
Valve side
Valve side Noise
LV End Y/Y
1800
1300
1550
1175
1705 1980
1430
1705
1293
1175 1600
1175
1300
Under rated power frequency voltage (dB(A))
75
Rated current (A)
1391
Tapping range
2 5 to 123
Tap step (%)
1.25
Tap transfer rate (steps/min)
12
Switching times without maintenance
1 3 105
Electrical life (switching times)
5 3 105
Mechanical life (switching times)
1 3 106
Full lightning impulse withstand voltage (kV)
325
Permissible continuous DC current flowing through neutral of line side winding of each phase’s converter transformer (A)
10
Tap changer
LV End Y/Δ
1050
700 Appendix C Table C.4: Dry-Type Smoothing Reactor. Main Technical Data
Unit Value
Rated inductance
mH
75(1 1 5%)
Nominal rated DC current IdN
A
4000
Maximum continuous operating DC current under 1.10 p.u. of the rated transmitting power
A
4497
Maximum DC current under 2 h overload operation
A
4731
Maximum current when operated at 1.4 p.u. overload for 3 s
A
5909
Transient fault current (peak)
kA
40
Nominal rated pole-to-neutral DC voltage
kV
800
Maximum continuous operating DC voltage under rated operation (including errors)
kV
816
Rated neutral bus voltage
kV
120
Maximum neutral bus voltage
kV
123
Winding temperature rise
Average temperature rise Hot-spot temperature rise
K K
80 105
Insulation level and test voltage (applicable to two series-connected 75 mH devices)
Switching impulse withstand level (peak, between terminals) Switching impulse withstand level (peak, terminal-to-earth) Lighting impulse withstand level (peak, between terminals)
kV
1675
kV
1600
kV
2100
Lightning impulse withstand level (peak) Chopped lightning impulse withstand level (peak, between terminals) DC withstand voltage (kV, DC, 120 min, to ground)
kV
1950
kV
2310
kV
1236
dB
70
Insulation level and test voltage (applicable to two series-connected 75 mH smoothing reactors)
Sound pressure level
Table C.5: Wall Bushings (kV). 6 800 kV Line Pole Bushing
6 400 kV Line Pole Bushing
Rated operating voltage (DC)
800
400
Maximum continuous operating voltage (DC)
816
408
DC withstand voltage (DC)
1224
612
Power frequency withstand voltage
865
433
Lightning impulse withstand level
1800
1300
Switching impulse withstand level
1620
1050
Polarity reversal withstand voltage (DC)
1020
510
Main Technical Data
Main Technical Data of UHV DC Electrical Equipment 701 Table C.6: DC Voltage Measuring Device. Main Technical Data
Unit
Line Pole (Fulong)
Neutral Bus (Fulong)
Nominal DC voltage UdN
kV
8
10
Maximum continuous DC voltage Udmax
kV
816
95
Measuring ranges
kV
1 1200
6 120
Output bus voltage of isolated A/D system
p.u.
1.0
1.0
kV
800
60
DC voltage withstand test (dry) (60 min), simultaneously with polarity reversal and partial discharge test
kV
1224
143
Lightning impulse tests
kV
1950
574
Table C.7: DC Current Measuring Devices. Between Two 12-pulse Converters
Main Technical Data
Unit
Line Pole (in Valve Hall and Outdoor)
Neutral Bus (in Valve Hall and Outdoor)
Converter on HV Side
Converter on Neutral Bus Side
Rated DC current IdN
A
4000
4000
4000
4000
Steady-state DC measuring limit
A
5000
5000
5000
5000
Transient measuring limit
kA
24
24
24
24
Lightning impulse withstand level
kV
2182
450
1800
1175
Switching impulse withstand level
kV
1792
325
1600
950
Measurement accuracy
(0134%) IdN
%
0.5
0.2
0.5
0.2
(134300%) IdN
%
1.5
1.5
1.5
1.5
(300600%) IdN
%
10
10
10
10
Table C.8: DC Arresters. DC Arresters
Valve Arresters
Main Technical Data
Unit
DB
CBH
CBL
V11
V12
V2/V3
Continuous voltage (peak)
kV
824
878
404.5
248.8
248.8
248.8
Continuous voltage with commutation overshoot (peak)
kV
916
496.4
Reference voltage Uc (DC)
kV
969
1070
553
288.4 288.4 295.6 pffiffiffi pffiffiffi pffiffiffi 204 2 204 2 210 2
Maximum residual voltage under steep front current 1000 A (peak) impulse 3000 A (peak)
kV
, 1536 , 1627 , 842
, 420
, 420
, 430
kV
1536
, 1627 , 842
, 420
, 420
, 430
10 kA (peak)
kV
1653
1753
907
432
454
467
20 kA (peak)
kV
1751
1864
964
454
482
497
1000 A (peak)
kV
1381
1453
751
369
376
387
3000 A (peak)
kV
1445
1518
785
380
393
405
10 kA (peak)
kV
1547
1642
849
406
425
437
20 kA (peak)
kV
1621
1731
896
425
448
461
300 A (peak)
kV
1316
1402
725
, 360 363
363
1000 A (peak)
kV
1371
1447
748
368
374
385
3000 A (peak)
kV
1431
1510
781
379
391
402
For a single impulse (4 ms)
kJ/kV
7.0
7.0
7.0
7.0
7.0
7.0
13,500
19,000
10,100 10,300 5100
5300
3
4
4
4
Maximum residual voltage under 8/20 µs current impulse
Maximum residual voltage under 3045/6090 µs current impulse
Energy absorption rating
For the entire surge arrester kJ Number of parallel columns
8
4
Main Technical Data of UHV DC Electrical Equipment 703 Table C.9: DC Transfer Switch. Main Technical Data
Unit
MRTB
GRTS
NBS
NBGS
Rated current
A
4970
4970
4970
Rated voltage
kV
95
95
95
95
Maximum transfer current
A
4330
1200
4970
4970
Maximum transfer voltage (peak)
kV
120
54
55
45
Maximum arcing time if the switch operates successfully
ms
20
20
20
20
1860
262
950
794
The integral of arcing current over time if the switch fails As and recloses LIWL between breaks (dry)
kVcrest 189
85
88
71
LIWL to ground (dry)
kVcrest 574
574
574
574
SIWL between breaks (wet)
kVcrest 138
62
64
52
SIWL to ground (wet)
kVcrest 452
452
452
452
The (maximum) rate of rise of recovery voltage
kV/ ms
280
280
280
280
Normal closing time
ms
50
50
50
50
Normal reclosing time (COC) if the switch fails
ms
430
218
191
160
Operation cycle
OCO OCO COC COC
Number of series poles
2
1
2
2
Rated capacitance
µF
60
22
60
60
Maximum energy absorbed by arrester
kJ
53,050
1270
5570
1700
Nominal inductance
µH
60
Table C.10: Main Technical Data of Other UHV DC Projects. Main Technical Data
Yunnan—Guangdong Project
Haminan—Zhengzhou Project
Xiluodu—Zhejiang Project
DC voltage (kV)
6 800
6 800
6 800
DC current (kA)
3125
5000
5000
DC power (MW)
5000
8000
8000
Transmission distance (km)
1373
2210
1669
Main connection scheme
Each pole having two series connected 12-pulse converter units
Each pole having two series connected 12-pulse converter units
Each pole having two series connected 12-pulse converter units
Converter transformers
Capacity (MVA)
250.21 (Sending end) 244 (Receiving end) Short-circuit impedance 18% (Sending end) 18.5% (Receiving end) Step size 1.25% Number of tap 1 18/ 2 6 (Sending end) positions 1 16/ 2 8 (Receiving end) Type Single-phase two-winding Cooling method ODAF (Sending end) ODAF (Receiving end)
405.13 (Sending end) 376.61 (Receiving end) 20% (Sending end) 19% (Receiving end) 1.25% 1 23/ 2 5 (Sending end) 1 25/ 2 5 (Receiving end) Single-phase two-winding OFAF (Sending end) ODAF (Receiving end)
404 (Sending end) 382 (Receiving end) 19% (Sending end) 19% (Receiving end) 1.25% 1 23/ 2 5 (Sending end) 1 23/ 2 5 (Receiving end) Single-phase two-winding OFAF (Sending end) ODAF (Receiving end)
Converter valves
Size (inch) Valve tower structure
5 Double valve unit
6 Double valve unit
6 Double valve unit
Smoothing reactors
Inductance (mH) Type Arrangement
300 Dry Line pole: 2 3 75 mH Neutral bus: 2 3 75 mH
300 Dry Line pole: 3 3 500 mH Neutral bus: 3 3 500 mH
300 Dry Line pole: 3 3 500 mH Neutral bus: 3 3 500 mH
AC filters/ shunt capacitors
Total compensation capacity (Mvar)
3366 (Sending end) 3010 (Receiving end)
3575 (Sending end) 4940 (Receiving end)
5200 (Sending end) 4879 (Receiving end)
DC filters
Type (for each pole of a 12/24 and 36/48 converter station) Equivalent disturbing Monopolar: 2000 current (mA) Bipolar: 2000
12/24 and 2/39
12/24 and 2/39
Monopolar: 6000 Bipolar: 3000
Monopolar: 6000 Bipolar: 3000