Anholt Offshore Wind Farm

Transcription

1 Anholt Offshore Wind Farm Vindmølleindustrien May 21 th 2013 Flemming Thomsen Senior Director DONG Energy Wind Power

2 Anholt Offshore Wind Farm 111 wind turbines located on 88km 2 between the peninsula of Djursland and the island of Anholt in the sea of Kattegat Total capacity: 400MW Equals the annual electricity energy consumption of 400,000 households (eq. Greater Copenhagen) The wind farm will cover 4% of Denmark's total electricity consumption with CO 2 emission-free electricity 2

3 Economics of Anholt Offshore Wind Farm DONG Energy is guaranteed øre/kwh (no price regulation) for the first 20 TWh, equivalent to approx. 12 years, equals 140 /MWh After this, the electricity is sold on market terms without subsidies The capital investment for the farm is approx. 10 billion DKK Grid connection approx. 1.3 billion DKK Total investment 1.5 billion The concession lasts for 25 years. 3

4 Wind farm is in operation before end 2013 Time February 2008 Activity Political agreement of the establishment of a 400 MW wind farm April 2009 DEA release tender specifications April 2010 DEA receive tender 2 July 2010 Concession granted DONG Energy July 2010 Autumn 2011 January 2012 January 2012 Geological surveys commenced Shore landing cable work commenced Start offshore construction Foundation construction commenced March 2012 June 2012 September 2012 October 2012 Summer 2013 Transformer platform work commenced Laying-out of cables in the wind farm commenced Erection of wind turbines commenced First electricity Entire wind farm operational 4

5 DONG Energy is Owner and EPC contractor Anholt Offshore Wind Farm is jointly-owned by DONG Energy (50%), PensionDanmark (30%) and PKA (20%). DONG Energy is responsible for construction and operation of the wind farm. PensionDanmark is a customer-owned pensions company handling: collective-bargaining and company-agreed labour market pensions, health schemes and employee training fonds for 600,000 members employed in 22,000 public and private companies. PKA is the largest administration company for pension funds administering labour market pensions for eight independent pension funds with a total of 245,000 members. More than 90% are women. The members are employed in the social and health services and with the local authorities. 5

6 Anholt Offshore Wind Farm the Site 111 wind turbines located 20 km from Grenaa and 15 km from the island of Anholt. Optimised layout concept aims at maximising annual energy production considering soil conditions, turbine / foundation loads and other physical constraints. Concentrated rows of turbines on the edge of the wind farm and more disperse rows inside. This has previously shown higher production than a standard grid layout. Turbine distances are approx. 600 meters at the edge and approx meters inside the wind farm. 6

7 Park layout Original park layout Allowed to use 88km 2 out of 144km 2 Original park layout based on geophysical survey from EIA Some indications of soft soil areas meant detailed depth profiles for all turbine positions Analysis showed that some positions were challenged by soft subsoil leading to changes in the final park layout Final park layout Final park layout optimised for energy yield taking into account: Geotechnical properties of the site (in respect of the installation process and future use of vessels with jack-up function) The best use of the available area Losses caused by interference between the turbines 7

8 111 structures Nacelle / Turbine Blades Blade length: 58.5m Rotor diameter: 120m Tower built from 3 tower sections m Transition Piece Secures monopile on tower/turbine and has boat landing and access ladder for service vessels Water surface Monopile Hammered 20-30m into the seabed Seabed 8

9 First monopile Aalborg 7

10 Installation of Monopiles with HLV Svanen January to July

11 Installation Transition Piece with Jumbo Javelin April to July

12 Cable installation within the wind farm June to September 2012 The 111 wind turbines are divided into 12 groups. Each group is connected with sea cables to the substation. Total cable length inside wind farm: 160km Total cable weight: 3900t 1450t copper is needed for the production of the cables 12

13 Turbine installation with 4 different vessels Up to 3 at the same time 13

14 Wind turbine installation September 2012 to May 2013 Loading nacelle and Sea Power departure Grenaa with first turbine 31 th August 2012 SEA POWER A2SEA Semi jack-up 1 turbine per load-out 45 turbines installed 14

15 Wind turbine installation SEA WORKER A2SEA Jack-up barge Non self-propelled 2 turbines per load-out January to May turbines installed

16 Wind turbine installation SEA JACK A2SEA Jack-up Barge Non self-propelled 2 turbines per load-out February to March turbines installed

17 Wind turbine installation SEA INSTALLER A2SEA Purpose-built vessel 2 turbines per load-out February to April turbines installed 17

18 Working 24/7 18

19 Grenaa Harbour Load-out of turbines and O&M facilities Distance to turbines 18 km to 35 km 19

20 Siemens pre-assembly site in Grenaa m 2 90 persons 20

21 The installation vessels jack-up when loading turbines 21

22 Working through winter 22

23 Last TP ready for turbine installation, cleaned for bird droppings.. 23

24 and equipped with flags, balloons, fresh air and Wunderbaums 24

25 Sea Power installing turbine 111 on

26 Last blade is realised from the installation tool 26

27 Energinet.dk installs and operates the substation and cables to shore Trafoplatform installed spring 2012 and energized late June 2012 The cable to shore north of Grenaa is 25km long and has a diameter of approx 26cm. It will probably be the world's largest submarine cable to date measured by diameter The cable will carry 220 kv AC which is the highest voltage ever transmitted through a sea cable The cable will be connected to a land cable leading to the existing onshore substation at Trige near Aarhus DONG Energy has various medium voltage and communication equipment on the offshore platform 27

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29 Base harbour in Grenaa DONG Energy has modified and extended existing buildings to provide office and storage facilities in Grenaa for O&M activities Workforce of 70 people permanently located in Grenaa 29

30 Installation case vessels and manpower on site Site activities Expted Man years Number of persons Number of Vessels

31 Anholt Offshore Wind Farm creates ripple effect The project creates approx 8,000 jobs in the construction period* Orders for almost 7 billion DKK with Danish-based companies Orders for more than 300 million DKK with local suppliers Operations with a crew of approx 70 employees is established in the service buildings in Grenaa Three service vessels permanently based in Grenaa *The Danish Energy Agency and Danmarks Statistik have estimated the total net employment effect in Denmark at 8,000 jobs in the construction phase.

32 Thank you for your attention Further information 32