power transmission solutions grid access

1 04-2009 Power Transmission DivisionE T PS SL/Re

Power Transmission SolutionsGrid Access

1 Power Transmission DivisionE T PS SL/Re04-2009

© Siemens AG 2009Energy Sector

Connecting the 500 MW Greater Gabbard Offshore Wind Farm to the Grid

Dietmar RetzmannAlberto Schultze


Global Trends CO2 Reduction – Green EnergyMegacities – Security of Supply



Electrical Energy is the Backbone of our Society …

… today and in Future



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 ?

5 04-2009 Power Transmission DivisionE T PS SL/Re5 Power Transmission DivisionE T PS SL/Re

of Power Supply04-2009

ustainability


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)


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


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



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.


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


Examples of Studies – Verification of Grid Code

Source: EWIS Interim Report June-2008


System and Design Studies:Detailed Modeling of a Number of Wind Farms


Example of System and Design Studies:Single Line Diagram of a complex System – Example with DC Link


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)



SVC PLUS – A View of the Technology

Cooling System Converter Control & Protection


Layout SVC PLUS: Example of +/- 50 MVAr


21 m

25 m


SVC PLUS: Example of Factory Acceptance Tests – Nuremberg, Germany

17 Power Transmission Division04-2009 E T PS SL/Re


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


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


Landing Point for the Sea Cables

Sizewell A Nuclear Power StationSizewell B Nuclear Power Station

132 kV Cables


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


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


Gabbard Offshore Substation



October 2008 – Supports ready for Deck Assembly



November 2008 – Deck Assembly



December 2008 – Structure appears



March 2009 – Onshore Civil Works …


come out of the Ground


April 2009 – Internal Structure & Helipad


May 2009 – Platform GIS Switchboard



May 2009 – Final Tuning



May 2009 – Ready for Roll out



Roll out 6th June 2009



The Future ? – Global Link for Green Energywith HVDC and FACTS

6-7 GW DCs in China

Thank You for Your Attention !

power transmission solutions grid access

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