Tennet News

14 Feb 2020

Siemens Hands Over BorWin3 to TenneT

Image: Siemens

The BorWin3 offshore wind grid connection project in the German North Sea has been handed over to the German/Dutch transmission grid operator TenneT, by contractors Siemens and Petrofac.The 900 MW project will convert three-phase electric power generated by the Hohe See and Albatros offshore wind farms into direct current and transmit it 160km back to shore to the German national grid.Siemens was responsible for the grid connection system including an onshore converter station.The grid connections HelWin1 and HelWin2…

13 Feb 2020

TenneT Intros 2GW Offshore Grid Plans

Image: TenneT

European transmission system operator TenneT has announced plans to build two 2 GW offshore grid connections in the IJmuiden Ver wind energy area, having entered into a so-called 'innovation partnership' with its suppliers.Given the combination of the large distance to the coast and the size of the IJmuiden Ver wind energy area, a 2 GW direct current (HVDC) solution, based on 525 kilovolts, appears to offer most economical  advantages. It requires only one cable system per 2 GW…

22 Jan 2020

VLCV BV Completes Borssele Cable Project

Image: C-Ventus Offshore Windfarm Services BV

VLCV BV, a joint venture between VL Specials and C-Ventus Offshore Windfarm Services, has completed the installation of two ducts, including bellmouths, for the cable system of the Borssele offshore wind project in the Netherlands.Arvid de Groot, Project Manager at VLCV BV said: “Today I can proudly announce that both ducts and Bellmouths have been successfully installed. Our teams have been working hard since October on the successful installation of both ducts. The successful…

13 Nov 2019

Prysmian Wraps Up DolWin3 Gig

Image: Prysmian

Prysmian Group, the major player in energy and telecom cable systems industry,  has has announced that it commissioned the 900MW DolWin3 high voltage direct current (HVDC) offshore grid link in the German North Sea.Prysmian had secured this project in February 2013, with a contract awarded by Alstom Grid (now GE Grid GmbH) on behalf of the Dutch-German grid operator TenneT.DolWin3, the third offshore grid connection in the DolWin cluster, links the offshore converter platform DolWin Gamma…

23 Oct 2019

NKT Services TenneT Offshore Cable Joints

Image: NKT

German-Dutch power grid operator TenneT has awarded the cable company NKT with a three-year service agreement contract covering the cable jointing part of a larger offshore service agreement.The contract covers the cable jointing work for seven power cable systems and includes a tailored preparedness plan designed by NKT to ensure minimum downtime in case of damages to the high-voltage power cables, which originally was manufactured by NKT.For NKT, the agreement supports the company’s…

04 Sep 2019

DNV GL to Certify TenneT Platform in German Sea

Pic: DNV GL

DNV GL has signed a four-year framework agreement with TenneT to provide project certification for new High Voltage Direct Current (HVDC)  substations linked to offshore wind farms in the German North Sea.Agreement includes certification of TenneT’s DolWin5 converter platform with cost-saving offshore grid connection concept. TenneT awarded DNV GL the contract following an independent EU tendering process.Under this framework agreement, DNV GL is expected to carry out project certification for upcoming TenneT’s HVDC platforms…

03 Sep 2019

COBRA Cable Readies for Action

IGBT converter tower  inside the COBRAcable converter station in Eemshaven (photo: Siemens)

The 700MW COBRAcable interconnector linking the Dutch and the Danish grid will be available for the electricity market as of delivery day, 7 September, Dutch high-voltage grid operator TenneT said."After three years of construction, including the laying of the submarine cables as well as the construction of two onshore converter stations, and a successful test phase earlier this year, COBRAcable will be available for the electricity market as of the delivery day of 7 September…

16 Jul 2019

German North Sea Wind Power Output Up

Image: TenneT

The North Sea "wind harvest" of the first half of 2019 exceeds the first half of 2018 by 16 percent.TenneT Holding said in a press release that in the first half of 2019, the wind energy transmitted from the North Sea to land by the transmission grid operator TenneT rose to 9.51 terawatt hours (TWh).This corresponds to an increase of a good 16 percent compared with the first half of 2018 (8.17 TWh), said the transmission system operator in the Netherlands and in a large part of…

19 Jun 2019

Prysmian Bags Dolwin5 Cabling

Schematic illustration of offshore grid connection project DolWin5. Image: Prysmian

Italian multinational corporation Prysmian Group  has been awarded a major grid connection project worth in region of EUR 140 million by the Dutch-German grid operator TenneT which will enable the connection of multiple offshore wind farms to the German grid.“The Dolwin5 project continues our valued long relationship with the major TSO TenneT and demonstrates our ability to provide tailor-made submarine cable solutions for challenging projects, providing the offshore infrastructure needed to support the growth of clean energy in Northern Europe.” stated Hakan Ozmen…

05 Jun 2019

Wilhelmsen Acquires 50% of NorSea Wind

Image: Norsea Wind AS.

Norway-based global maritime industry group Wilhelmsen Ship Management (WSM) has announced the acquisition of a 50% stake of NorSea Wind and it’s subsidiaries to expand its offerings in the the renewable wind energy market.NorSea Wind, founded in 2016 as a subsidiary of  Norsea Group, provides project management and logistics planning throughout all stages for on and offshore wind farm projects.It is the focal element within Norsea Group where it integrates all service offerings for the wind energy segment as it’s go-to-market strategy.

22 May 2019

TenneT Issues EUR1.25bln Green Bond

Image: TenneT

Netherlands-based transmission system operator TenneT Holding B.V. has launched and priced another Green Bond issue of EUR 1.25 billion, with proceeds set to be used for investing in offshore wind.The Green Bond issue is split in two tranches of EUR 500 million and EUR 750 million with the support of five banks: ABN AMRO, Barclays, HSBC, NatWest Markets and SMBC Nikko."Proceeds will be used to invest in green projects in the Netherlands and Germany to connect large scale of offshore wind to the onshore electricity grid…

08 May 2019

Keppel-Aibel Team Wins German Offshore Gig

Image: Aibel

Norwegian energy services provider Aibel AS and a unit of Singaporean conglomerate Keppel Corporation have jointly won a contract to deliver two converter stations as part of the DolWin cluster servicing German offshore wind farms.The grid operator TenneT Offshore has tasked Aibel and Keppel O&M, a unit of Keppel Corp, with the design, engineering, procurement, construction, installation and commissioning of a 900-MW offshore High Voltage Direct Current (HVDC) converter station…

17 Apr 2019

Tennet Relocates Submarine Cable from Borssele

Image: TenneT Holding B.V.

The transmission system operator Tennet has moved the first submarine cable from the Dutch wind farm zone "Borssele" to the transformer station."TenneT has laid the first sea cable to connect the Alpha platform to the transformer substation in Borssele. In the morning of Friday 12 April, VBNK started withdrawing the sea cable on land and early Saturday morning the cable reached the newly built transformer substation," said a press release.The cable-laying vessel, Giant 7, then…

16 Apr 2019

Interview: Astrid Skarheim Onsum, SVP, Head of Wind, Aker Solutions

Offshore renewable energy is gaining investment support in the United States, particularly on the east coast. While the U.S. is a full generation behind its European counterparts in tapping the wind as an energy source, if current plans come to fruition it could gain ground quickly. Recently we spoke with Astrid Skarheim Onsum, SVP, Head of Wind Aker Solutions, for her view on the path ahead and the growing role and promising future of ‘floating wind.’Please give an overview of your responsibilities as SVP…

26 Sep 2018

DNV GL to Certify TenneT Offshore Power Substations

Image: DNV GL

DNV GL, the world’s largest resource of independent energy experts and certification body, has been contracted by Transmission System Operator TenneT to deliver the complete project certification for two offshore substations (OSS) for the Hollandse Kust Zuid offshore wind farms in the Dutch North Sea.The reliability of renewable sources is increasingly important as the world continues to rapidly electrify while also switching to greener forms of generation. According to DNV GL’s…

25 Sep 2018

Boskalis is Exploring Biofuels

(Photo: Boskalis)

Dutch dredging and offshore contractor Royal Boskalis Westminster N.V. said it will run its vessels on a biofuel blend while working on a project to install the export cable to the Borssele offshore wind farm.The Borssele Alpha project is being executed on behalf of TenneT and is aimed at connecting the Borssele offshore grid with the Dutch high-voltage grid.During this project, Boskalis will run its vessels on a biofuel blend of up to 30 percent. As of last week, the large trailing suction hopper dredger Prins der Nederlanden is powered by a biofuel blend…

13 Sep 2018

BorWin Gamma Platform Sails Away

Image: Petrofac

The offshore converter platform, BorWin gamma, has now safely set sail from Dubai and begun its journey to  its offshore site in the German part of the North Sea.Through the Gulf of Oman, the 18,000 ton ‘topside’ will pass into the Red Sea before going through the Suez Canal onto the Mediterranean and past Gibraltar. The journey then moves through the Bay of Biscay, to the English Channel and into the North Sea where it will be integrated with the ‘jacket’ nearly 130 kilometres off the German coast.Along with BorWin3…

07 May 2018

Under the Sea: A Roadmap for Renewable Energy

© Fokke / Adobe Stock

Thanks to increasing levels of debt financing for climate-aligned projects, wind-generated power has become one of the fastest-growing green industries. Jessica Williams, an Infrastructure Analyst at S&P Global Ratings, considers the submarine technologies that are making this progress possible.Renewable energy is making an increasing contribution to the electrical grid. By the end of 2016, “green energy” sources accounted for almost a quarter of the world’s electricity supply, according to REN21.

26 Feb 2018

Norsea, Wilhelmsen Bag Offshore Wind Deal

The offshore wind market is moving from niche to being one of the leading sources of renewable energy. Photo courtesy NorSea Group

NSG Wind and Wilhelmsen Ship Management have together won a five year frame agreement with TenneT, a leading European electricity transmission system operator. NSG Wind and Wilhelmsen Ship Management have secured a frame agreement running until 2022. The framework agreement is to provide a complete technical maintenance solution for TenneT’s off- and onshore transformer stations and AC electricity transmission systems. Dennis Jul Pedersen, CEO of NSG Wind, says: “The offshore wind market is moving from niche to being one of the leading sources of renewable energy.

09 May 2017

Energy Island: Europeans Mull North Sea Hub

Image: TenneT

A plan set in motion by three European transmission system operators (TSO) aims to develop mammoth offshore wind farm infrastructure in the North Sea supported by at least one manmade island. First unveiled in June 2016, plans for the North Sea Wind Power Hub project will now press ahead to develop a large offshore renewable European electricity system following the signing of a trilateral agreement by TenneT TSO B.V. (Netherlands), Energinet.dk (Denmark) and TenneT TSO GmbH (Germany) in Brussels on March 23, 2017.

23 Jan 2017

Rotterdam port mull power-to-gas-plant development

Photo Port of Rotterdam Authority

Six Rotterdam-based parties will investigate how sustainably generated electricity, converted into hydrogen, can be used in the production of fuels. TNO, Stedin, Smartport, Uniper, BP Refinery Rotterdam and Port of Rotterdam Authority will investigate the technical and economic feasibility of a power-to-gas plant in the Rotterdam port area, as well as the necessary amendments to regulations. The parties above signed a cooperation agreement to this end on 18 January 2017. The construction…

18 May 2016

DNV GL bags COSCO's HVDC Converter Platform Deal

DNV GL - Korea - Stoddart, Arthur William  Courtesy DNV GK

DNV GL has been awarded a contract by COSCO Shipping Company Limited (COSCO SHIPPING) of China for the installation engineering services for the BorWin gamma high voltage direct current (HVDC) converter platform. The Dutch-German transmission system operator TenneT is developing the offshore AC/DC converter platform BorWin gamma as part of the grid connection project BorWin3. The project will provide an essential renewable offshore resource to meet increasing energy demands in Germany, as part of the German Energiewende (Energy Transition) programme.

28 Jul 2015

ABB hands over Germany’s DolWin1

Germany’s DolWin1 Photo ABB

ABB, the leading power and automation technology group, has successfully commissioned and handed over the DolWin1 offshore wind grid connection to the Dutch-German transmission system operator TenneT. The 800 megawatts (MW) High Voltage Direct Current (HVDC) link connects offshore wind farms around 75 kilometers off the German coast in the DolWin cluster, with the country’s transmission grid. The DolWin1 grid connection can integrate 800 MW of offshore wind power, enough to supply around one million households with clean energy.

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