www.senergyworld.com

The Super Smart Windy Grid – The Offshore Option

Presentation by Peter McGarleyRenewableUK 2010

Glasgow SECC 3rd November

Senergy Econnect

• International consultants and advisors in renewable energy and grid integration

• Over 50GW of grid integration studies for wind with ~3GW projects connected

• Services include:

• Electrical engineering

• On-site generation

• Grid connection feasibility

• Grid code compliance

• Due diligences

• Commercial & regulatory

• Geophysical and geotechnical

consultancy

• Cable routing and burial protection

indices

• Consultancy

• Smartgrid products

• Electrical design

• Technical adviser

• Technical services

• Strategic services

• Foundation design,

construction and installation

assessment

EU OffshoreGrid

• PROJECT DNA• Techno-economic study

• Coordinator 3E, 8 partners, consultancy & applied research

• Budget: 1.4 million euros

• Funding: 75% from Intelligent Energy Europe (Contract IEE/08/780/SI2.528573)

• May 2009 to October 2011

Consortium Members

• CONSULTANTS

• 3E: strategy, techncial coordination, management

• Senergy Econnect: Grid design optimisation

• IEO: thorough knowledge on wind power policy

• dena: power markets and regulatory situation

• APPLIED RESEARCH

• Sintef: power market model and TradeWind experience

• Uni Oldenburg: energy meteorology

• NTUA: wind energy in the Mediterranean

• INDUSTRY ASSOCIATION

• EWEA: communication and technical review

• STAKEHOLDER INPUT / REVIEW

EU OffshoreGrid

• GENERAL OBJECTIVES• Recommendations on topology and capacity choices

• Guideline for investment decision & project execution

• Trigger a coordinated approach for the Mediterranean ring

• SPECIFIC OBJECTIVES• A selection of blueprints for an offshore grid

• Business figures for investments and return

• Insight in interaction of design drivers and techno-economic parameters

• Representative wind power time series

• Feedback from & acceptance by stakeholders

EU OffshoreGrid

• Senergy Econnect scope:

• To provide the technical design for an integrated offshore transmission network allowing connection of offshore wind and marine renewables and interconnection between the countries of the Baltic and North Seas for the purposes of arbitrage where justified

• Technical design is integrated in to a power market model of the European grid produced by SINTEF to assess power flows on offshore grid – iterative process

• To provide a cost estimate for such a network or networks

EU OffshoreGrid Reference

• Planned offshore wind and marine

CountryOffshoreGrid offshore scenario

2020 2030

Belgium 1 994 3 794

Denmark 2 329 3 799

Estonia 0 1 600

Finland 590 3 190

France 2 510 4 914

Germany 10 249 26 553

Ireland 1 055 3 780

Latvia 0 900

Lithuania 0 1 000

Netherlands 4 622 12 122

Norway 957 9 667

Poland 500 5 300

Russia 0 500

Sweden 2 983 10 522

UK 15 303 38 146

Total Northern EU 42 135 115 620

Total OffshoreGrid 43 093 125 787

EU OffshoreGrid Reference

• ENTSO-E - TYNDP

Radial Scenario

• Initial step – define radial scenario

• Each project connected radially to selected onshore connection point

• Appropriate technology solution selected based on project capacity, timing and connection distance, e.g.

• HVAC technology ineffective beyond 80km• Projects <2020 use technology commercially available today• Projects >2030 use evolved technologies

• Connection distance determined by GIS plots around subsea obstacles

Key Design Assumptions

• OffshoreGrid technology used to be evolutionary rather than revolutionary

Pre 2010 150kV HVAC 3 core subsea cable

+/- 150kV 400MW HVDC Voltage Source Converters

2010 2020 220kV HVAC 3 core subsea cable

+/-320kV 1000MW HVDC Voltage Source Converters

320kV XLPE subsea HVDC cable

2020 2030 380kV HVAC 3 core subsea cable

+/-500kV 2000MW HVDC Voltage Source Converters

500kV XLPE subsea HVDC cable

HVDC Circuit Breakers

Radial Scenario

Radial Scenario

• Statistics:

• Total Connected Capacity = 129GW

• Total Cost = €83.201bn

• €643k/MW

• Total length of cable = 31,500km

• 294 HVDC VSC converter stations

Hubs

• 1st stage of Offshore Grid

• Group projects into hubs and share export cables

• Cost effective

• Less cabling

• Fewer cables at landfall

• Risk of stranded assets

Case Study German Hubs

• Total Connected Capacity = 26.6GW• Hubs

• Total Cost = € 18,650m (€15,280m excluding onshore cables)

• €702k/MW (€575k/MW excluding onshore cables)

• Base Case Comparison• Total Cost = € 28,069m (€20,116m excluding onshore

cables)

• €1057k/MW (€758k/MW excluding onshore cables)

Meshed OffshoreGrid

• Connect +/- 320kV and +/-500kV hubs

• Defined by prototype Grids

• Justified by further need for arbitrage between countries

• Capacity for interconnection to be established from market model iterations

Meshed OffshoreGrid

• Comparison:• Look at Additional

Direct Links• Higher capital cost

• No constraint

• Key – determine balance of cost and constraint from modelling

EU OffshoreGrid Challenges

• Technical• Onshore bottlenecks• Technology e.g. different voltages used

• Market• Planning uncertainties• Risk & financing• Variable generation vs long-term contract on cable

• Regulatory• Different regulatory schemes• Slow permitting procedures• Unclear cost allocation & allowed profit margins

• Policy• Renewable energy support schemes• Political priorities

EU OffshoreGrid

• Stakeholder Meetings

• We want your input

• Held twice per year

• Next meeting:• 22nd November 2010• Berlin• See details on www.offshoregrid.eu or me afterwards

Senergy Econnect

Thank You

Peter McGarley

econnect@senergyworld.com

+44 (0)191 238 7300