Tennet News

DEME has been awarded two contracts from cable solutions provider Prysmian for the engineering and installation works for the IJmuiden Ver Alpha and Nederwiek 1 offshore grid systems in the Netherlands, whose combined worth is over $315 million.This is the most extensive cabling award in DEME’s history and marks the company's first project involving Prysmian’s 525 kV HVDC cable technology, featuring increased transmission capacity, according to the company.The contracts encompass cable installation…

Jan De Nul Group together with its consortium partners LS Cable & System and Denys has signed the contracts for two 525 HVDC cable systems for the two grid connection systems BalWin4 and LanWin1. These mark the first two contracts signed under the long-term framework agreement that TenneT and Jan De Nul have signed earlier this year. The projects comprise the design, manufacturing, transport, installation, protection and testing of three 525 kV cable systems for connecting offshore…

Dutch shipbuilding conglomerate Damen announced it has delivered a new shallow draft vessel to the German energy infrastructure construction company Bohlen & Doyen Bau GmbH, a subsidiary of Friedrich Vorwerk. The new Multi Cat 1908 SD workboat, named Scholle, is the first marine asset to be bought by the company in many years.The 19.4-meter vessel has been bought for use on a multi-year project supporting transmission system operator TenneT on its offshore grid connection systems in the North Sea.

France-based Nexans has announced an expansion in its presence in the offshore wind and interconnection market, by adding a third cable laying vessel to its fleet.This strategic decision will allow the Group to meet the increasing demand for electrification, especially in the American and European markets, driven by a record project backlog and recently strengthened by contracts for TenneT and the section of the EuroAsia Interconnector that connects Greece and Cyprus.Building upon the technology featured on Nexans' flagship vessel…

Germany boosted its offshore wind power capacity by 357 megawatts (MW) to 7,036 MW last year, inching towards a planned 30,000 MW by 2030, power grid operator TenneT said.The German arm of the Dutch transmission group will play a key role in achieving the target, linking the majority of new wind farms to onshore high-voltage transmission grids, with a commitment to provide six 2,000 MW links by 2031.

Italian subsea cable firm Prysmian Group said Thursday it has added a new vessel - Barbarossa I - to its fleet."After the debut of the state-of-the-art 170-meter Leonardo da Vinci [vessel] in August 2021, Prysmian Group’s fleet would seem to be complete. But with the addition of Barbarossa I, Prysmian Group becomes the first company in the sector that can provide the full range of submarine cable-laying solutions from the shallowest coastal waters in Northern Europe to the profoundest depths of the Mediterranean Sea.

Dutch/German grid operator TenneT said Monday that the 900 MW offshore substation platform DolWin kappa had sailed away from the Dragados Offshore shipyard in Cádiz, Spain. "TenneT will soon be reliably bringing even more green wind power from the German North Sea to land via the direct current connection DolWin6," TenneT said in the announcement of the sailaway which took place on August 5, 2022."After only three years of construction, the platform is now on board the transport barge “Iron Lady” and on its way to the Dutch port of Rotterdam.

Offshore installation and decommissioning contractor Allseas has removed the Ninian Northern jacket in the North Sea in a single lift, showcasing its new jacket lifting system installed aboard its giant Pioneering Spirit vessel.In what was the first deployment of the new jacket lifting technology, Pioneering Spirit removed CNR International’s Ninian Northern jacket from the northern North Sea and transported it intact to shore for recycling.Weighing in at 8100 tonnes, the first commercial lift with Pioneering Spirit’s Jacket lift system (JLS) is one of the heaviest offshore jackets lifts ever…

Dutch marine services company Boskalis has delivered the Hollandse Kust Zuid Beta substation topside to Tennet in the Netherlands after a long journey from Dubai, where it was built.This is the second High Voltage Alternating Current (HVAC) offshore transformer station topside, built by Petrofac and Drydocks World Dubai for the Dutch-German transmission grid operator TenneT.The 700 MW Beta topside weighs 3,950 tonnes. It was shipped to the Dutch North Sea aboard Boskalis' Mighty Servant 3 heavy lift and transportation vessel.

TenneT's investigation has shown that there is no major damage to the HKZ Beta jacket in the Dutch North Sea which was hit by a drifting bulk carrier in a storm in January. This means that the 3,950t topside can be installed on the jacket as planned, forming part of the Hollandse Kust Zuid (HKZ) grid connection that connects the offshore wind farm zone to the Dutch mainland at the Maasvlakte. The wind farm is being built by Vattenfall. The incidentOn Monday, January 31, the freighter Julietta D.

In research prompted by the incident in the Dutch North Sea in January when a drifting bulk carrier hit offshore wind facilities, Dutch maritime research institute MARIN this week, with industry partners, tested three innovative barriers aimed at averting collisions between ships and wind turbines.The drifting bulk carrier Julietta D initially collided with a tanker before hitting a transformer platform and a turbine foundation for the Hollandse Kust Zuid wind farm currently under…

The second High Voltage Alternating Current (HVAC) offshore transformer station topside, delivered by Petrofac and Drydocks World Dubai for the Dutch-German transmission grid operator TenneT, has set sail from the fabrication facility in the UAE, Petrofac said Monday.The 700 MW Beta topside weighs 3,950-tonne. It is being shipped to the Dutch North Sea aboard Boskalis' Mighty Servant 3 heavy lift and transportation vessel. The topside will form part of the Hollandse Kust Zuid (HKZ) grid connection that connects the offshore wind farm zone to the Dutch mainland at the Maasvlakte.

A cargo ship was cast adrift by storm Corrie on Monday in the Dutch North Sea, in the area where grid operator TenneT is building two transformer platforms (Hollandse Kust Zuid Alpha and Beta) for the connection of the offshore wind farm Hollandse Kust Zuid that is being built by Vattenfall. "TenneT is currently working on the Hollandse Kust Zuid Alpha platform. Fortunately, the situation was safe for the 100 or so employees present and there was no need to evacuate," Tennet said Tuesday.However…

Belgian offshore installation service provider DEME Offshore has installed the DolWin6 High Voltage DC (HVDC) cable in the German North Sea, using its LNG-powered DP3 vessel Living Stone. DolWin6 has a transmission capacity of 900 MW and is owned and operated by transmission system operator TenneT. The HVDC cable runs from several offshore wind farms in Germany via Norderney to the German mainland."This is the first time a cable-laying vessel has installed cables while powered on LNG…

Borssele III & IV, one of the largest offshore wind farms in the Dutch sector of the North Sea, has reached full commissioning, Van Oord a partner in the Blauwwind consortium behind the 731.5 MW wind farm's development, said Thursday.Blauwwind is a consortium between Shell, Partners Group, Eneco, DGE and Van Oord.Located 22 kilometers off the Dutch coast and the Province of Zeeland, the wind farm is capable of powering 825,000 Dutch households with electricity. Roeland Borsboom, Project Director for Blauwwind said: "This is a great achievement by everybody involved.

Dubai's Drydocks World shipyard has cut first steel for the HVAC Transformer Station Topside, named Hollandse Kust Zuid (HKZ) Beta.This is the third such unit that Drydocks World will be constructing for Petrofac and end-client TenneT, and the second project for the HKZ offshore wind farm, as it is also building the Alpha HVAC substation.The HVAC platform will form part of a renewable energy wind farm, located in the HKZ grid connection in the Dutch sector of the North Sea. The topside will weigh approximately 3…

European transmission system operator TenneT has awarded VDL Network Supplies a contract to support the construction of half of the wintrack pylons (high-voltage pylons) for a new 380 kV high-voltage connection from Borssele to Rilland.The new pylons, which are some 60 to 80 meters high, will be produced by VDL KTI in Mol (Belgium). The high-voltage pylons will be supplied between early 2021 and late 2022 and erected on the TenneT route between Borsele and Rilland in the province of Zeeland.The high-voltage lines that connect the pylons will transport electricity originating from wind farms off the coast of Zeeland, which are due to be completed this year and next year.Project Manager Nicolien Vrisou van Eck from TenneT said: “We have every confidence in our partnership with VDL.

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, BorWin2, SylWin1, and BorWin3 – for which Siemens supplied all the technology for direct current transmission – are thus now in commercial operation and are transmitting power.Siemens, together with Petrofac, was awarded the contract for BorWin3 in the spring of 2014.

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 completion of this EPC-project illustrates the capacities of VLCV BV on complex and challenging operations”.The Borssele cable project consists of the design…

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 strategic focus to grow its service business as the industry attention for power cable service is expected to increase in the years ahead.The global transition…

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, representing a cost-saving grid connection concept which will be applied for connecting offshore wind farms…

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, limiting the impact on the environment and the surroundings.To realise such an innovative direct current system, TenneT launched the design phase with five HVDC suppliers on the basis of an innovation partnership: ABB Power Grids…

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, located approximately 85 kilometers offshore in the North Sea, to the German mainland.As a one-stop-shop service provider, Prysmian was responsible for the supply…