power transmission solutions grid access
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1 04-2009 Power Transmission DivisionE T PS SL/Re
Power Transmission SolutionsGrid Access
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© Siemens AG 2009Energy Sector
Connecting the 500 MW Greater Gabbard Offshore Wind Farm to the Grid
Dietmar RetzmannAlberto Schultze
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Global Trends CO2 Reduction – Green EnergyMegacities – Security of Supply
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Electrical Energy is the Backbone of our Society …
… today and in Future
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Greenland Melt-Down has accelerated –
Sea-Level Rise from Ice-Melting and thermal Expansion: 1961-2003: +18 +/-5 cm per 100 Years 1993-2003: +31 +/-8 cm per 100 Years
Source: Gregory et al., Nature (2004)
Possible Maximum Value as Worst-CaseBusiness-As-Usual Scenario
Source: "An End to Global Warming“, L.O. Williams,Elsevier 2002
Accelerated Greenland Melt-Down North of Germany after Sea-Level Rise by 100 m
Pictures of the Future ?
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of Power Supply04-2009
ustainability
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Lynn / Inner Dowsing, GB, 200854 x SWT-3.6-107 (194 MW)
Burbo Banks, GB, 200725 x SWT-3.6-107 (90 MW)
Lillgrund, SE, 200748 x SWT-2.3-93 (110 MW)
Middelgrunden, DK, 200020 x SWT-2.0 (40 MW)
Horns Rev II, DK, 200991 x SWT-2.3-93 (209 MW)
Samsø, DK, 200210 x SWT-2.3-82 (23 MW)
Rhyl Flats, GB, 200925 x SWT-3.6-107 (90 MW)
Gunfleet Sands, GB, 200930 x SWT-3.6-107 (108 MW)
Rødsand, DK, 200372 x SWT-2.3-82 (165,6 MW)
Vindeby, DK, 199111 x 450 (4,95 kW)
Offshore Windfarms in Europe – our Projects
Gunfleet Sands II, GB 200918 x SWT-3.6-107 (64,8 MW)
* planned or under Construction
Rødsand II, DK, 201090 x SWT-2.3-93 (207 MW)
Sheringham Shoal,GB, 201188 x SWT-3.6-107 (316,8 MW)
Several DONG Projects in Northern Europe500 x SWT-3.6 (1800 MW) *
Greater Gabbard,GB, 2009/2010140 x SWT-3.6-107 (504 MW)
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Solutions for Grid Access
Grid Access, SVC, SVC PLUS, HVDC, HVDC PLUS
MV / HV-SwitchgearCablingwith MV / HV-cables
Potentially:
Gearbox
Wind Power (E R WP)Drive Technologies (I DT) Power Transmission (E T)
Blades Nacelle
Wind Turbine
Turnkey Wind Farms
Generator variable or fixed Speed
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Siemens Energy: Turnkey Solutions for Grid Access – from one single Source
Studies
Engineering
Procurement
Construction
Training &Maintenance
Cable and Laying
Civil Works
Road Works
Platform Construction
Project Financing
AIS, HIS, GIS
FACTS, HVDC
MV Switchgear
Transformers
Control, Communication
and Protection
Technology Service Partnership
Wind Turbines
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Turnkey Responsibility:First and crucial Steps
Definition of most economic Wind Farm Network and Grid Connection (AC versus DC).
Define Layout and specify Components of the entire Grid Connection.
Load-Flow Studies and Short-Circuit Calculations of the whole System.
Define the System Grounding Concept and perform Insulation Coordination for the entire Grid Connection.
Verification the static and dynamic Performance and Design of Reactive Power Compensation and / or DC System.
Evaluation of System Resonance Behavior driven by the Cables, Transformers, Reactors and Wind Generators.
Prove the Conformity with the GRID CODE.
Design of Protection, Control (SCADA) and Communication System.
System Efficiency: Evaluation of overall Losses for various Scenarios.
Evaluation of Electro-Magnetic Interferences for the Grid Connection.
Optimization of System Reliability and Availability.
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Turnkey: Responsibility –from Studies to Commercial Operation
Procurement, Transport, Erection,Commissioning
Commercial Operation
System and Design Studies
538 m538 m
538 m538 m
538 m538 m
538 m538 m
538 m
73 A219 A
8010 m
219 A219 A
219 A438 A
438 A
657 A
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Examples of Studies – Verification of Grid Code
Source: EWIS Interim Report June-2008
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System and Design Studies:Detailed Modeling of a Number of Wind Farms
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Example of System and Design Studies:Single Line Diagram of a complex System – Example with DC Link
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SVC PLUSThe Advanced STATCOMInnovation Meets Experience
Single Units:
+/- 25 MVAr+/- 35 MVAr+/- 50 MVAr
Up to 4parallel Units:
+/- 200 MVAr
Siemens uses MMC Technology(Modular Multilevel Converter)
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SVC PLUS – A View of the Technology
Cooling System Converter Control & Protection
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Layout SVC PLUS: Example of +/- 50 MVAr
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21 m
25 m
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SVC PLUS: Example of Factory Acceptance Tests – Nuremberg, Germany
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Greater Gabbard: World’s largest Offshore Wind Farm – Overview
Project Owner:
Airtricity
Project Development:
Airtricity & Fluor
Balance of Plant Contractor:
Fluor
Solution for Grid Access:
Siemens
Wind Turbines:
Siemens
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Greater Gabbard Offshore Wind Farm
132 kV Export Cable Lengths:
Gabbard to Onshore approx. 46 km –Three Circuits
Galloper to Gabbard approx. 16 km –One Circuit
Inner Gabbard:
100 Wind Turbines
Galopper:
40 Wind Turbines
Inter-Array Cables: 33 kV
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Landing Point for the Sea Cables
Sizewell A Nuclear Power StationSizewell B Nuclear Power Station
132 kV Cables
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Greater Gabbard Main Platform
2 Decks, Topside approx. 2000 t:16 incoming 33 kV Cables from Wind Turbine Array 3 GIS 33 kV Switchboards3 x 33/132 kV Transformers,3 Winding 90/90/180 MVAAuxiliary/Earthing Transformers4 GIS 132 kV Circuit Breakers132 kV Cable Connections to TransformersGenerator, Refuge, Fire Suppression, Metering, etc.Helipad
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Galloper Platform
2 Decks, Topside approx. 2000 t6 incoming 33 kV Cables from Wind Turbine Array GIS 33 kV Switchboard2 x 33/132 kV Transformers,2 Winding 90 MVA Auxiliary/Earthing Transformers2 x 33 kV 30 MVAr ReactorsGIS 132 kV Circuit Breaker132 kV Cable Connections to TransformersGenerator, Refuge, Fire Suppression, Metering, etc.Helipad
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Gabbard Offshore Substation
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October 2008 – Supports ready for Deck Assembly
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November 2008 – Deck Assembly
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December 2008 – Structure appears
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March 2009 – Onshore Civil Works …
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come out of the Ground
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April 2009 – Internal Structure & Helipad
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May 2009 – Platform GIS Switchboard
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May 2009 – Final Tuning
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May 2009 – Ready for Roll out
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Roll out 6th June 2009
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Roll out 6th June 2009
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Roll out 6th June 2009
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The Future ? – Global Link for Green Energywith HVDC and FACTS
6-7 GW DCs in China
Thank You for Your Attention !
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