Offshore wind farm Borkum Riffgrund

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Offshore wind farm "Borkum Riffgrund"
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location
Offshore wind farm Borkum Riffgrund (Germany)
Offshore wind farm Borkum Riffgrund
Coordinates 53 ° 58 ′ 0 ″  N , 6 ° 33 ′ 0 ″  E Coordinates: 53 ° 58 ′ 0 ″  N , 6 ° 33 ′ 0 ″  E
country Germany
Waters North Sea
Data
Type Offshore wind farm
Primary energy Wind energy
power Reef bottom 1: 312  MW
Reef bottom 2: 448 MW
Reef bottom 3: 900 MW
owner Ørsted and others
Start of operations Riffgrund 1: 2015
Riffgrund 2: 2019
Riffgrund 3: 2024Template: future / in 4 years
founding Riffgrund 1:
77 × Monopile
1 × Suction-Bucket-Jacket
Riffgrund 2:
36 × Monopile
20 × Suction-Bucket Jacket
turbine Reef bottom 1:
78 × Siemens SWT-4.0-120 Reef
bottom 2:
56 × MHI Vestas V164
Website https://orsted.de/offshore-windenergie/unsere-offshore-windparks-nordsee
was standing October 2019
f2

Borkum Riffgrund is an offshore wind farm in the German exclusive economic zone of the North Sea . It consists of the three sub-areas Borkum Riffgrund 1 , Borkum Riffgrund 2 and Borkum Riffgrund 3 . Borkum Riffgrund 1 with 78  wind turbines of the type Siemens SWT-4.0-120 was taken in October 2015 operation, Borkum Riffgrund 2 with 56 wind turbines of the type MHI Vestas V164 followed in June 2019. Ørsted plans Borkum Riffgrund 3 bis 2024 Template: future / in 4 yearsto build.

Borkum Riffgrund 1

planning

The project was originally planned by PNE AG . The rights were sold to the Danish energy company Ørsted . However, PNE remained involved in the planning. The wind farm is located around 38 kilometers north of the island of Borkum and covers an area of ​​over 35 km². The permit application was submitted on June 9, 2000. Approval for the construction and operation of 77 wind turbines was granted on February 25, 2004 by the Federal Maritime and Hydrographic Agency (BSH) on the basis of the Marine Plant Ordinance and was initially limited to June 30, 2007. The deadline for the start of construction was extended to May 1, 2014 and a 78th plant with a suction bucket jacket foundation was approved .

The plans looked like this:

  • 2013: Construction of the transformer platform
  • Beginning of 2014: Construction of the foundations and laying of cables
  • Summer 2014: Installation of the wind turbines (since October 2014)
  • 2015: Completion of the wind farm

The total investment is 1.25 billion euros. The license holder and operator is Borkum Riffgrund I Offshore Windpark A / S GmbH & Co. OHG , an operating company based in the north .

Participation structure of Borkum Riffgrund 1 (as of October 25, 2019) :

proportion of Shareholders
50% Ørsted
32% Kirkbi Invest A / S
18% William Demant Invest A / S

construction

To secure the construction work in the construction site at sea, a 500 m safety zone was set up on August 1, 2013 around the planned locations of the outer wind turbines. From January 2014, the components for the foundations ( monopiles ) were transported to the construction site with the GeoSea installation ship “Pacific Orca” from Eemshaven, which serves as the base port . The installation of the 77 monopile foundations was completed at the end of July 2014.

At the end of August the “Pacific Orca” laid another foundation with new technology. It was a suction bucket jacket , which consists of a three-legged jacket structure with three bucket foundations . These are pressed into the ground synchronously by pumping them out with little noise. Coordinates of this system: 53 ° 58 ′ 2.7 ″  N , 6 ° 33 ′ 35.5 ″  E

Location of Borkum Riffgrund within the wind farm in the German Bight

The wind turbines, which have been installed on the foundations since October 2014, were brought to the construction site from Esbjerg in Denmark with the A2SEA installation vessel " Sea Installer " and erected there.

From June 2014, the 26 km long 155 kV AC submarine cable system supplied by the Norddeutsche Seekabelwerke (NSW) was laid from the transformer platform in the wind farm to the HVDC converter station DolWin alpha from the “Boa Sub C” cable layer . On February 17, 2015, some of the wind turbines supplied the first electricity via this connection. The last turbine was installed at the end of May. At this point in time, around half of the wind turbines were already connected to the grid. The remaining systems were connected to the grid during the summer.

The wind farm was officially opened on October 9, 2015 in the presence of Joachim zu Denmark .

Technical specifications

78 Siemens SWT-4.0-120 wind turbines with a nominal output of 4  MW and a rotor diameter of 120 m are used. The hub height is around 83 m, which means that the systems are around 142 m high up to the blade tip. With one exception, monopiles were used as foundations, which were driven into the seabed between 16 and 30 meters. The water depth on site is between 23 and 29 meters. The plant type was changed during the planning phase. Originally, Borkum Riffgrund 1 was to consist of a total of 77 wind turbines, each with 3  MW and a total output of 231 MW.

The grid connection of Borkum Riffgrund 1 is carried out by the transmission system operator Tennet TSO via high-voltage direct current transmission (HVDC). The electricity produced is routed to the converter station “Dörpen West” in Heede via the converter platform DolWin alpha located close to the wind farm and the 165 km long HVDC system DolWin1 (75 km sea and 90 km underground cables) . The Trianel Borkum wind farm with a total output of approx. 400 MW is also connected there.

Borkum Riffgrund 2

planning

The wind farm consists of two sub-areas, approx. 37 km and 40 km northwest of the island of Borkum and approx. 57 km from the Lower Saxony coast. The total area of ​​43 km² is located in the vicinity of Borkum Riffgrund 1 and Borkum Riffgrund 3 . The water depth there is about 25 to 30 meters.

In the original planning of PNE2 Riff II GmbH on July 25, 2006, 97 wind turbines with an output of 3.6 to 6 MW had been applied for and approved by the BSH on November 30, 2011 in accordance with the Marine Plant Ordinance. In the meantime, the project was sold by PNE to Ørsted in 2009.

In October 2012, Ørsted stopped Borkum Riffgrund 2 for the time being because the transmission system operator Tennet TSO could not promise to complete the grid connection on time.

With the participation of the Federal Network Agency, the expected completion date of the grid connection with 450 MW connected load was set for July 22, 2018 in 2015.

In June 2015, Ørsted announced that it would continue Borkum Riffgrund 2 and - subject to the final investment decision - opt for MHI Vestas V164 turbines with 8 MW each.

Due to the change in the type and number of systems (from 97 to 56), adjustments to the 2011 permit were necessary. In addition, the building permit, initially limited to 2015, was extended to July 1, 2018. In June 2016, Ørsted announced that it had made the final investment decision. 20 of the 56 systems are based on suction bucket jackets, 36 systems on monopiles.

The license holder and operator is Borkum Riffgrund 2 Offshore Wind Farm GmbH & Co. OHG , an operating company based in the north .

Participation structure of Borkum Riffgrund 2 (as of August 8, 2017) :

proportion of Shareholders
50% Ørsted
50% Global Infrastructure Partners

construction

Jacket foundation of the transformer platform for Borkum Riffgrund 2

Construction work on the wind farm construction site began in early 2018. The 36 monopile foundations were installed from March to May . The suction buckets were connected to the 20 jacket constructions in Cuxhaven near Cuxport and in June and July, faster than planned, the GeoSea brought them into the seabed.

The Danish turbine manufacturer MHI Vestas used the "Port Knock" in Emden an der Knock as a service base for the installation of the 56 wind turbines . The installation of the 8 MW systems took place from May to August 2018 with the installation vessel Bold Tern by Fred. Olsen Wind Carrier.

The transformer platform was lifted and installed on June 25, 2018 by the crane ship SSCV Thialf on the jacket foundation that was erected in 2017. It collects and transforms the power of the systems from medium to high voltage and forwards it to the DolWin Gamma converter station of the network operator TenneT.

The wind farm went into commercial operation on June 4, 2019.

Network connection

The grid connection of Borkum Riffgrund 2 is carried out by the transmission system operator Tennet TSO via high-voltage direct current transmission (HVDC). Two 225 MW HVAC lines connect the wind farm's transformer platform with Tennets DolWin gamma converter platform . This is connected by submarine and underground cables (80 km each) to the onshore converter station “Dörpen West” in Heede , which again generates three-phase current. The HVDC system called DolWin3 is designed for 900 MW and went into operation in 2019. The Merkur offshore wind farm with an output of 396 MW is also connected there.

Borkum Riffgrund 3

The wind farm consisted of three sub-projects that were combined by the Danish energy supply company Ørsted (formerly: Dong Energy) in September 2019. Part of the electricity from 100 MW is supplied to the materials manufacturer Covestro via a ten-year energy supply contract .

Borkum Riffgrund West I and II

At the request of Energiekontor on March 23, 2000, on February 25, 2004 the Federal Maritime and Hydrographic Agency (BSH) approved the construction and operation of 80  wind turbines on the basis of the Marine Plant Ordinance . The area is 40 kilometers northwest of the island of Borkum and covers an area of ​​almost 30 km² with water depths of 29 to 33 meters. In November 2011 Ørsted acquired the wind farm rights.

For Borkum Riffgrund West II , Ørsted secured a contract for 240 MW in April 2017. In the invitation to tender under the wind energy at sea law , Ørsted offered 0.00 cents per kilowatt hour and thus secured grid connection capacity. In the tender in April 2018, Ørsted secured a further 420 MW for Borkum Riffgrund West I and again waived a market premium in accordance with the Renewable Energy Sources Act .

OWP West

At the request of Northern Energy OWP West GmbH (formerly LCO Nature GmbH ) on September 1, 2006, the BSH approved the construction and operation of 41 wind turbines on April 15, 2014 on the basis of the Offshore Plant Ordinance.

For Northern Energy OWP West , Ørsted secured a contract for 240 MW in April 2017. In the tender, Ørsted again offered 0.00 cents per kilowatt hour and thus secured additional grid connection capacity.

Network connection

The total connected load of 900 MW will be connected to the DolWin5 offshore HVDC system . The 130 km long direct current connection to the grid connection point Umspannwerk Emden / Ost near Borssum will be implemented using 100 km of submarine and 30 km of underground cables. The three-phase connection of the wind farms to the converter platform DolWin epsilon will take place by means of a new 66 kV direct connection concept. With this concept, the 66 kilovolt cable harnesses of the wind turbines are connected directly to the offshore converter platform. The elimination of the 155 kV three-phase submarine cable systems and wind farm transformer stations that were previously used, reduces the overall costs of the DolWin5 grid connection system . The responsible transmission system operator is again Tennet TSO.

business

Ørsted base in Norddeich

Ørsted has been using a site in Norddeich as a maintenance and service base since 2015 . Here is the operations control center, built by the construction company Johann Bunte . Due to the expansion in the North Sea, the operations control center is being expanded.

See also

Web links

Footnotes

  1. ↑ Ørsted wins another offshore wind auction in Germany. In: orsted.de. April 27, 2018. Retrieved April 28, 2018 .
  2. ↑ Focus magazine “UNOFOLIO”, November 2011 edition, p. 6, ISSN  2190-3964
  3. ↑ Offshore wind farm Borkum Riffgrund 2 approved . In: Schiff & Hafen , issue 2/2012, p. 45, Seehafen-Verlag, Hamburg 2012, ISSN  0938-1643
  4. ↑ Notification of approval. (PDF) February 25, 2004, accessed October 25, 2019 .
  5. ↑ Investing in offshore wind . In: Schiff & Hafen , issue 4/2012, p. 6, Seehafen-Verlag, Hamburg 2012, ISSN  0938-1643
  6. ↑ NfS 29/13 v. June 15, 2012, pp. 4.4–4.6, BSH , Hamburg / Rostock 2013, ISSN  0027-7444
  7. ↑ Eckhard-Herbert Arndt: "Riffgrund 1": Precision work . In: Daily port report of February 26, 2014, p. 15, ISSN  2190-8753
  8. ↑ Foundations for the Borkum wind farm via Eemshaven . In: Hansa , issue 2/2014, p. 8, ISSN  0017-7504
  9. ↑ GeoSea aces reef bed test. In: reNEWS - Renewable Energy News. July 29, 2014, accessed January 22, 2018 .
  10. ↑ Dong debuts bucket at Reef Bottom. In: reNEWS - Renewable Energy News. August 28, 2014, accessed January 22, 2018 .
  11. ↑ Eckhard-Herbert Arndt: Turbine safely installed · Offshore wind farm Borkum "Riffgrund 1" is supplied by Esbjerg . In: Daily port report of October 28, 2014, p. 3
  12. ↑ “Boa Sub C” takes over submarine cable · NSW produces components for TenneT for the connection of “Borkum Riffgrund 1” . In: Daily port report of June 3, 2014, p. 15
  13. ↑ Eckhard-Herbert Arndt: Offshore Park "Riffgrund 1" now supplies green electricity . In: Daily port report from February 18, 2015, p. 1
  14. ↑ David Weston: Dong completes Borkum Riffgrund 1 installations. In: Windpower Offshore . May 27, 2015, accessed May 27, 2015 .
  15. ↑ Martinelle Rich: Big wave in the wind from the sea. In: Westfälische Nachrichten . October 9, 2015, accessed October 9, 2015 .
  16. ↑ TenneT: DolWin1. Retrieved January 22, 2018 .
  17. ↑ Notification of approval. (PDF) December 30, 2011, accessed October 25, 2019 .
  18. ↑ Wind farm in the North Sea is threatened. In: T-Online.de . December 30, 2011, accessed October 21, 2012 .
  19. ↑ Federal Network Agency : Approval to change an expected completion date. (PDF) October 29, 2015, accessed April 3, 2017 .
  20. ↑ Ørsted: Wind turbines for Borkum Riffgrund 2: DONG Energy and MHI Vestas sign supply contract. August 24, 2015, accessed January 22, 2018 .
  21. ↑ DONG Energy chooses 8 MW offshore wind turbines from Vestas for wind farm Borkum Riffgrund 2. In: windkraft-journal.de. June 15, 2015, accessed January 22, 2018 .
  22. ↑ Ørsted: DONG Energy decides to build the German offshore wind farm Borkum Riffgrund June 2 , 2016, accessed on January 22, 2018 .
  23. ↑ Eckart Gienke: Mega wind farm is being built off the coast. In: Nordwest-Zeitung . June 25, 2016. Retrieved June 27, 2016 .
  24. ↑ Dong sells shares in the offshore wind farm Borkum Riffgrund 2. In: IWR.de. August 8, 2017, accessed January 22, 2018 .
  25. ↑ First offshore foundation Riffgrund 2 . In: Renewable Energies. The magazine , March 9, 2018.
  26. ↑ Cuxport turns suction buckets for "Borkum Riffgrund 2" . In: Hansa , issue 5/2018, p. 86.
  27. ↑ Ørsted: Borkum Riffgrund 2: First suction bucket jacket foundation installed. Press release, June 4, 2018.
  28. ↑ Ørsted: Last suction bucket jacket foundation installed in the offshore wind farm Borkum Riffgrund 2. Press release, July 31, 2018.
  29. ↑ MHI Vestas makes Emder Port Knock the base . In: Hansa , issue 5/2018, p. 87.
  30. ↑ Ørsted: Borkum Riffgrund 2: First 8-megawatt turbine successfully installed in the German North Sea. Press release, May 7, 2018.
  31. ↑ Ørsted: Last wind turbine installed in the offshore wind farm Borkum Riffgrund 2. Press release, September 3, 2018.
  32. ↑ Ørsted: Offshore transformer station installed in the Borkum Riffgrund 2 wind farm. Press release, June 26, 2018.
  33. ↑ Ørsted: Offshore wind farm Borkum Riffgrund 2 officially in operation. June 4, 2019, accessed June 12, 2019 .
  34. ↑ TenneT: DolWin3. Retrieved January 22, 2018 .
  35. ↑ Ørsted is merging future offshore wind farms under the new names Borkum Riffgrund 3 and Gode Wind 3. In: Ørsted. Retrieved September 10, 2019 .
  36. ↑ Kathrin Witsch: Orsted builds the first offshore wind farm without subsidies. In: Handelsblatt . December 3, 2019, accessed December 4, 2019 .
  37. ↑ Notification of approval. (PDF) In: Federal Maritime and Hydrographic Agency . February 25, 2004, accessed September 21, 2019 .
  38. ↑ DONG Energy acquires rights to the offshore wind farm Borkum Riffgrund West. In: cleanthinking.de. November 21, 2011. Retrieved November 29, 2011 .
  39. ↑ a b Katharina Wolf: Three projects without EEG funding are awarded. In: Renewable Energies. The magazine . April 18, 2017. Retrieved April 28, 2018 .
  40. ^ Tilman Weber: 4.66 cents for German offshore wind power. In: Renewable Energies. The magazine. April 27, 2018. Retrieved April 28, 2018 .
  41. ↑ Notification of approval. (PDF) In: Federal Maritime and Hydrographic Agency. April 15, 2014, accessed September 21, 2019 .
  42. ↑ TenneT DolWin5. Retrieved August 29, 2019 .
  43. ↑ Bunte builds offshore headquarters in Norddeich. In: New Osnabrück Newspaper . January 30, 2014, accessed July 16, 2017 .
  44. ↑ Bunte wins the contract to expand the offshore headquarters. In: New Osnabrück Newspaper . May 15, 2017. Retrieved July 16, 2017 .