d23_abb_stark winfarm and hvdc light
TRANSCRIPT
© ABB AG April 20, 2009 | Folie 1
Connecting Offshore Windfarm Clusters by HVDC Light®
Günter Stark, Windstärke 09 “Kurs Offshore“, Bremerhaven 16/17 Juni 2009
© ABB AG Juni, 2009 GST | Folie 2
Overview
Why HVDC ?
HVDC Classic, HVDC Light®
BorWin 1
Project Overview
Platform
Sea Cable
Land Cable
Outlook
© ABB AG Juni, 2009 GST | Folie 3
Development of the Electrical Grid
After first steps with DC:Standardisation with three-phaseAC current
Power transmission over longdistances at high voltage levels750kV/400kV in order to reduce losses
Production and consumptionof electrical energy in the samegeographical area.
© ABB AG Juni, 2009 GST | Folie 4
Characteristics of AC Cable Connections
Advantages
Known technology
Economical for short distances
Disadvantages
Reactive power compensation necessary
Max. economical distance around 100km
Longer distances need compensation on half way
Max. power around 250 MW (today)
Instability and resonancesbetween wind farm and grid possible
© ABB AG Juni, 2009 GST | Folie 5
What is HVDC?
DC Current
AC Current
HVDC Converter
HVDC Converter AC Current
HVDC Technology has been developed 50 Years ago.
© ABB AG Juni, 2009 GST | Folie 6
HVDC TechnologiesHVDC Classic and HVDC Light
600 MW,200 x 120 x 22 m
HVDC Classic (300 – 6.400 MW)Thyristor-Technology
Typical design: Valve building, filter and switchgear
Mass impregnated cables
Limited reactive power supply
HVDC Light® (50 – 1.100 MW)IGBT-Technology
Typical Design: Building withall components except transformers
VPE-Cable
Full reactive power supply
Voltage Source Converter
Black start capability550 MW,
120 x 50 x 11 m
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HVDC Classic 3000 MW Longquan Converter Station, Panorama View
© ABB AG Juni, 2009 GST | Folie 8
Overview
Why HVDC ?
HVDC Classic, HVDC Light®
BorWin 1
Project Overview
Platform
Sea Cable
Land Cable
Outlook
© ABB AG Juni, 2009 GST | Folie 11
Offshore wind power connectorsHVDC Light grid connection
© ABB AG Juni, 2009 GST | Folie 15
Example: Grid connection of the offshore wind farms cluster “SylWin” in the German North Sea
Transmission distance:
Sea cable: 160 km
Land cable: 50 km
Offshore wind farms
Sandbank 24
Nördlicher Grund
DanTysk
Butendiek
Nordpassage
…
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Scenario 1 with 10 x 200 MW AC grid connection
Platform
AC Cable
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Scenario 2 with 5 x 400 MW HVDC grid connection
PlatformDC Cable
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Scenario 3 with 2 x 1000 MW HVDC grid connection
PlatformDC CableAC Cable
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The first project to connect offshore wind BorWin 1
Customer: E.ON, Germany
Customer‘s need:connection of a 400 MW offshore wind farm to the German transmission grid125 km coast distancewithin two years (in operation end of 2009)
ABB response400 MW HVDC Light®system, ±150 kV125 km sea cable, 75 km land cableTurnkey delivery including platform
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BorWin 1 Single Line Diagram
DC
Cap
acito
r
AC B
reak
er +
pr
eins
ert.
Res
isto
r
DC
Cho
pper
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BorWin 1 Platform layout
Topside weight approx 3.300 t(incl. 800 t ABB equipment)Size approx 52 x 35 x 22 m Jacket 1.500 t (Height 62 m, sea level to topside approx 20 m) Topside and jacket verified, witnessed and approved by Germanische Lloyd according to the German rules & regulationsPermits for the platform has to be obtained from BSH before start of installation & operation
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BorWin 1 Platform and Jacket
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BorWin 1Plattform Montage
Plattformdeck:3800 to. ABB Equipment ca. 850 to.Maße: 50x30x25m
Montage in Vlisssingen NL
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BorWin 1HVDC Light® IGBT Module Stack und Transformator
Plattformdeck:3800 to. ABB Equipment ca. 850 to.Maße: 50x30x25m
Montage in Vlisssingen NL
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BorWin 1HVDC Light Station, Diele
Cooling Units
ReactorsValves
Chopper
AC Filter Yard
DC FilterYard
Power Transformer
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BorWin 1HVDC Light® Cables
121 km sea cable (1200 mm2 Cu)
8,4 km Wadden Sea, Norderney und Ems (1600 mm2 Cu)
73,6 km land cable (2300 mm2 AL)
Triple extruded VPE
- Conductor shield- HVDC Polymer Isolator- Isolator shield
Lead shield
Armour steel protection
Outer layer: Polypropylen
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BorWin 1Installation des Landkabels im Sommer 2008
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Temperature distribution in the Ground (Example)
Max. losses of 60 W/m result in max.55 W/m2 at Surface above the cable (Solar Radiation in Winter approx: 200 W/m2)
Temperature at Cable Jacket in Summer Conditions: 42 °C(Dray out of the earth will occur earliest at 50 °C )
4139373533312927252321191715
Temperature in °C
-1 -0,8 -0,6 -0,4 -0,2 0 0,2 0,4 0,6 0,8 1 1,2
0
-0,2
-0,4
-0,6
-0,8
-1,0
-1,2
-1,4
Depth in m
Distance in m
40
35
30
25
20
Temperature in °C
0 0,40,2 0,6 0,8 1
Distance in m
Temperature profilecorrespondingto the red line
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Magnetic Field
No electrical field outside the cable
Very low magnetic field
Exactly similar to natural magnetic field
Less that 1/10 of Earth‘s magnetic field
2 m above the cable (≈ 1 m above Ground)
Cable Distance in m
Mag
netic
Fie
ld in
Mic
rote
sla
DC CableEarth Magnetic FieldLimit for Public Areas
© ABB AG Juni, 2009 GST | Folie 31
Conclusion
HVDC will be an important contribution for the challenges in the expansion of the grid in Germany -today and in the future.
Offshore wind farm connection
Additional transmission capability of the existing 400-kV-Grid
Many innovations during the last 15 years with ongoing development
No substitute for the existing development of the AC grid.
© ABB AG Juni, 2009 GST | Folie 32