TenneT is a leading European grid operator. We are committed to providing a secure and reliable supply of electricity 24 hours a day, 365 days a year, while helping to drive the energy transition in our pursuit of a brighter energy future – more sustainable, reliable and affordable than ever before. In our role as the first cross-border Transmission System Operator (TSO) we design, build, maintain and operate 24,500 km of high-voltage electricity grid in the Netherlands and large parts of Germany, and facilitate the European energy market through our 16 interconnectors to neighbouring countries. 

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North of the Maasvlakte, TenneT is developing the Hollandse Kust (zuid) offshore grid for the connection of new wind farms. Four offshore cables will be buried in the North Sea bed. For the first ten kilometres of the offshore cable route, these cables will be sunk 5.5 metres into the seabed to cross the busy Rotterdam "Maasmond". The first two cables were installed in September 2020 and now the remaining cables will follow. Tuesday the underwater robot 'Deep Dig-It' has successfully crossed the Rotterdam Maasmond with the third cable and is now on its way to the recently installed Beta jacket in the Hollandse Kust (zuid) wind area.

Deploying an underwater robot to lay cables for the offshore Hollandse Kust Zuid project

Offshore Cable Underwater Robot Hollandse Kust zuid Rotterdam Maasmond.jpg

Underwater robot laying cables successfully crossed the Rotterdam Maasmond to connect Hollandse Kust (zuid)

2GW standard essential to help Europe become the world’s first climate-neutral continent by 2050. TenneT starts tender of 2GW stations (Platform & HVDC system) for Dutch IJmuiden Ver projects. First 2GW IJmuiden Ver project operational in 2028.

Cable load for the Hollandse Kust Zuid Alpha project - 2020

Offshore Cable Load Hollandse Kust Zuid Alpha 2020.jpg

Tender 2GW high voltage stations big step towards 2050 climate neutral Europe

The wind power booster realises acceleration potential of three years for Germany's ambitious climate targets. Energy Ministers Olaf Lies and Jan Philipp Albrecht and Economics Senator Kristina Vogt welcome TenneT's initiative for sustainable grid expansion in the North Sea and coastal regions. Industry and offshore sector support TenneT's proposal as an essential contribution to decarbonisation and smart coupling of wind energy with hydrogen.

The LanWin hub

Offshore LanWin Wind Energy Hub 6GW Germany.jpg

The wind power booster: TenneT presents 6-gigawatt hub to accelerate offshore expansion targets

TenneT together with other European Transmission System Operators (TSOs) of the Core Capacity Calculation Region (Core CCR) have taken another important step on the backbone of the European Energy Market of the future: The Improved Coordination Solution (ICS) of remedial actions.

Pylon

Pylon 2016.jpg

Coordinating Remedial Actions In Core Region

·       2 GW standard essential to meet increased Dutch and German 2030 offshore targets 
·       TenneT starts tender of 525 kV DC offshore cable system for Dutch IJmuiden Ver projects
·       Market parties and TenneT set new global offshore standard, first connection operational in 2028

TenneT has opened 2GW Program tender for 525 kV DC offshore Cable manufacturing and installation

The European Organization of Transmission System Operators for Electricity (ENTSO-E)  gave the green light for supporting the electricity systems in Ukraine and Moldova. Following extensive safety, security and stability analyses, ENTSO-E, of which TenneT is also a member, has decided to provide emergency support to the Ukrainian and Moldovan power systems,  connecting it to the so-called 'synchronous' continental European electricity grids.

TenneT stands with Ukraine

Visual Oekraïne Ukraine ENTSO-E

Ukrainian and Moldovan electricity grids linked to European high-voltage grid

Hollandse Kust (zuid) Alpha, TenneT’s high voltage connection for offshore wind farms Hollandse Kust (zuid) I and II is ready for use. TenneT completed the installation and energization of the offshore grid connection. Wind farm developer Vattenfall can now connect the wind turbines to the high voltage grid. On top of that, the Hollandse Kust (zuid) Beta topside was successfully installed this week.

Hollandse Kust Zuid (beta) Topside

Two significant milestones for offshore grid connection Hollandse Kust (zuid)

The national grid operator TenneT is looking for parties in Limburg and Brabant who can flexibly handle their electricity supply and demand. This exploration is part of a so-called congestion study that the grid operator is currently conducting in order to use the busy electricity grid in these two provinces even more intensively.



hoogspanningsverbinding tussen Borssele en Rilland

Onshore hoogspanningsverbinding tussen Borssele en Rilland.jpg

TenneT in search of flexible power in Brabant and Limburg

•EIB signs a EUR 250 million loan agreement with TenneT to finance the 40km high voltage electricity transmission corridor in the North of the Netherlands between Eemshaven and Vierverlaten, as well as the new high voltage substation in Vierverlaten.

•The upgraded energy infrastructure will, amongst others, support the connection of North Sea wind farms to the electricity grid and ensure a high security of supply

•This financing increases the aggregate total EIB commitment to TenneT projects to EUR 1.8 billion.

Green Bonds

Finance Market Green Bonds 2022.jpg

EIB finances TenneT electricity transmission corridor in the Netherlands, supporting renewable energy production

The high-voltage grid in the provinces of Gelderland and Flevopolder is reaching the limit of what can be returned to the grid. The high-voltage substations and connections in this area are reaching the maximum limit of what can be transported. Over the next few years TenneT will make various investments to increase the capacity of the grid. At the same time, the transmission system operator will investigate the possibilities of using other solutions to create more space on the grid in an accelerated manner. This is evident from the formal notification that was made today to the ACM, the regulator of the energy market.

High-voltage grid in Gelderland and Flevopolder reaches limit for electricity feed-in

The expected congestion is caused by the rapid growth of solar and wind production in the grid of the regional grid operator (Liander) and in TenneT's grid. The resulting higher transport demand cannot be fully facilitated due to the limited available transport capacity in the high-voltage grid. 

TenneT expects structural congestion, as referred to in Article 9.5 of the Electricity Grid Code, in the 150kV grid in Flevoland and Gelderland during the period 2021-2029

On Monday 31 January, due to storm Corrie a cargo ship was cast adrift in the area where TenneT is building two transformer platforms (Hollandse Kust Zuid Alpha and Beta) for the offshore grid connection of the wind farm Hollandse Kust Zuid, that is being built by Vattenfall.

Detailed view of the damage caused by the cargo ship to the Hollandse Kust Zuid Beta jacket

Damage to the Hollandse Kust Zuid Beta jacket due to adrift ship collision cargoship detail 3 offshore

 Update on damage to HKZ Beta platform jacket caused by collision with a cargo ship

The offshore transformer station of the Hollandse Kust (zuid) Alpha platform is successfully installed on the jacket in the North Sea, about 20 kilometers off the coast of The Hague, on Sunday December 26th 2021. The transformer station, also called topside, is one of the two topsides of the Hollandse Kust (zuid) offshore grid, which will connect the offshore wind farm area with the same name to the Dutch onshore high-voltage grid. 

Offshore Platform Hollandse Kust Zuid alpha being lifted into place

Offshore Platform Hollandse Kust Zuid alpha lifted into place

Hollandse Kust (zuid) Alpha topside installed at the North Sea

TenneT will anticipate the new Electricity Grid Code in its ongoing congestion management studies. This will offer more possibilities to meet connection requests. These congestion studies will be completed as from Q1 2022.

Progress of TenneT congestion management studies

TenneT successfully priced a new EUR 1 billion senior Green Bond representing its largest ever issue-size. The market demonstrated keen interest for the offering with an order book of approximately EUR 2 billion. With the offering, TenneT reconfirms its status amongst the top 3 corporate issuers of green debt financing globally, with currently approximately EUR 13 billion of green debt issued across different formats during the last 6 years.

Strong market reception for TenneT’s new EUR 1 billion Green Bond

New consortium prevails: McDermott and GEIRI/C-EPRI win bid for converter stations at sea and on land / 980 megawatt grid connection - output of a large power plant / Record length of 190 kilometres of subsea cable

Offshore Platform BorWin6 (980MW) with its connection to land

Offshore Platform BorWin6 (980MW) connection to land Germany

TenneT awards land and sea station of grid connection project BorWin6 to international consortium

Cooperation agreement concluded on joint electricity hub and extra-high volt-age DC-line / Innovative multi-terminal hub planned in Schleswig-Holstein at the North Sea coast / Integration of four gigawatts (GW) North Sea offshore wind power / Electricity transport via 200 km long underground DC cable

Multi-terminal hub in the Heide area (as of January 2022)

Heide Hub Transformer Station Grid converter offshore - TenneT and 50hertz jointly bring wind power from the North Sea into the extra-high voltage grid

50Hertz and TenneT to jointly bring wind power from the North Sea into the extra-high voltage grid for the first time

North Sea "wind harvest" becomes a stabilising factor in the low-wind year 2021 / TenneT welcomes plans of the Federal Minister of Economics to prioritise offshore expansion in the future in the German North Sea  

Offshore Platform BorWin Gamma auf See 

German offshore share of total wind energy yield rises to almost 18 percent in 2021 In the Netherlands, almost twice as much wind energy was  produced offshore as onshore  

Battery storage helps to stabilize the electricity system by providing system services / Intelligent interaction of battery storage systems to support congestion management in the transmission network 

Fleet of electric vehicles

Bidirectional charging management project group electromobility electric vehicle 2

TenneT and be.storaged to use flexibility of battery storage to support stable network operation

NordLink - the "green cable" - receives "PR Report Award 2021” / TenneT's digital-hybrid press event marks a milestone in Corona times in the "Technology and Innovation" category

NordLink Report Award - the project team

NordLink Report Award - project team photo with the award

Award for NordLink: Digital opening ceremony with Chancellor Merkel sets new standards in media relations

Suppliers which have been invited for previous tenders for the above products do not have to respond to this notice, as they will automatically receive an invitation for the submission of their offers.

TenneT TSO B.V. has started the process for contracting Reactive Power for 2022

Both partners are receiving further support from the transmission system operator TenneT



TenneT, Ørsted, Uniper: More offshore wind power for the decarbonization of Germany as an industrial location

North Sea wind is becoming increasingly important for the success of the energy transition. TenneT is building 16 more offshore grid connections by 2030, increasing transmission capacity to around 29 gigawatts in the German and Dutch North Seas.

Offshore platform Borssele Beta

Offshore platform Borssele Beta wind turbines August 2020.jpg

Offshore share of total wind energy yield increases despite low wind in first half of 2021

TenneT continues successful pilot projects on the use of electromobility for the security of electricity supply as a partner in the joint research project "Bidirectional charging management - BDL". Intelligent charging control of electric cars can help stabilise the power grid and thus limit grid expansion. BDL project: First test vehicles delivered - testing in everyday life begins. 

Electric vehicle for Bidrectional Charging Management

Innovation Electric Vehicle Bidrectional Charging Management BDL News July 2021.jpg

Right of way for green electricity: TenneT investigates bidirectional charging management for e-cars

They have published a joint paper that highlights the key enabling role TSOs are playing in the establishment of a climate-neutral society by 2050.

8 leading European transmission system operators launch a common initiative to support the energy system to reach carbon neutrality

Arina Freitag is the new Chief Financial Officer (CFO) of the European grid operator TenneT as if  1 January 2022. Arina was previously Managing Director of Flughafen Stuttgart GmbH. Freitag succeeds Otto Jager, who left the company at the end of 2021.

CFO Arina Freitag

CFO Arina Freitag july 2021.jpg

Arina Freitag starts as TenneT's new CFO 

Investment of EUR 4 billion in European energy transition and system resilience in 2021
Solid financial performance with an underlying revenue of EUR 6.4 billion; EUR 4.25 billion of equity capital committed by Dutch government 
Looking ahead, growth must be responsible and smart, taking account of finite resources
Annual investment growing to a minimum of EUR 6 billion by 2025 

Annual report - Responsible growth

Annual Report 2021 Responsible Growth

TenneT speeds up growth to drive sustainable energy system

The installation of the second offshore transformer platform for the grid connection of wind farm Hollandse Kust (zuid) can be carried out as planned. TenneT has had investigations carried out on the jacket (substructure) that was damaged in January during storm Corrie by a collision with the adrift vessel Julietta D. 

Seen from top: the Sail Away of the Hollandse Kust (noord) platform

Offshore Platform Sail Away HKN Hollandse Kust Noord 

Installation of transformer platform can be carried out as planned

The second jacket of TenneT's offshore transformer platform for the wind farm Hollandse Kust (zuid) has arrived at its final destination and has been installed, some 22 kilometres off the coast of The Hague. The 2,852-tonne heavyweight was placed on the bottom of the North Sea by a special lifting vessel (the Sleipnir) of the Dutch company Heerema, on behalf of main contractor Petrofac. The jacket left the  fabrication yard end of May in the United Arab Emirates, where it was built. The jacket is the foundation on which the transformer platform will be placed. The connection for the wind farms will be ready for use in 2022.

Westküstenleitung Eiderquerung ohne Mast

Beta jacket for offshore power socket Hollandse Kust (zuid) installed

TenneT successfully issued the largest corporate Green  Eurobond transaction ever. In volatile times TenneT’s strong financial profile assured a solid response from investors, with orderbooks touching the EUR 8bn mark after final terms, showing several triple digit orders and a well-diversified investor base. With the offering, TenneT reconfirms its status amongst the top 3 corporate issuers of green debt financing globally, with currently approximately EUR 16.7bn billion outstanding, issued across different formats (senior, hybrid, USPP and Schuldschein) during the last 7 years

TenneT reconfirms position as top Green Bond Issuer

TenneT invested EUR 1,615 million in the Dutch and German high-voltage grids in the first half of 2021, a 14.7% increase compared to the first half of 2020 (EUR 1,408 million). Underlying operating result (EBIT) increased  to EUR 431 million in the first half of 2021 (first half of 2020: EUR 414 million). Underlining its robust financial position TenneT issued its largest ever (EUR 1.8 billion) and first green triple tranche Eurobond transaction.

TenneT's 2021 Half Year Report

Document Half Year Report 2021 Cover Towards a new balance.PNG

TenneT delivering on projects enabling the energy transition with record green financing in first half of 2021

A further reduction in the capacity of gas and coal-fired power plants will result in a greater interdependence among countries in Northwestern Europe to meet their security of supply requirements in the medium to long term (2025-2030). This will also create greater risks for the security of supply for the Netherlands. These are the findings of the report ‘Monitoring Security of Supply 2021’, an annual analysis by TenneT that is commissioned by the Dutch Ministry of Economic Affairs & Climate Policy. 

International dependency on security of electricity supply calls for more cross-border coordination 

On Monday 31 January, a cargo ship was cast adrift by storm Corrie in the area where TenneT is building two transformer platforms (Hollandse Kust Zuid Alpha and Beta) for the connection of the 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.

Damage to the Hollandse Kust Zuid Beta jacket

Damage to the Hollandse Kust Zuid Beta jacket due to adrift ship collision cargoship 2 offshore

Ship adrift near TenneT platforms

Through its existing network of smart chargers, NewMotion will manage the charging speeds of thousands of electric vehicles (EVs) to balance the grid and reduce our reliance on fossil fuel

stock freileitungsmast

stock freileitung mast

NewMotion is the first charge point operator licenced to deliver grid balancing services at megawatt scale

Boskalis has been awarded the Hollandse Kust West Beta export cable contract by TenneT, in consortium with Orient Cables (NBO). The contract scope comprises the installation of two 65-kilometer-long export cables that will connect the planned Hollandse Kust West Beta 700 MW offshore wind farm to TenneT’s onshore grid in the Netherlands. 

Offshore Project NL Hollandse Kust Zuid HKZ Zeekabel Aanlande

Offshore Project NL Hollandse Kust Zuid HKZ Zeekabel Aanlanden.jpg

TenneT awards Boskalis consortium Hollandse Kust West Beta export cabling contract

Contractor combination NRG (Denys, Alsema and Van Vulpen) will realise the link between the offshore cables for the wind farm Hollandse Kust (west Beta) and the transformer station in Wijk aan Zee for TenneT. NRG will install 2.5 km of high voltage underground cables from Velsen beach. This will be done by means of underground directional drilling, as used for the Hollandse Kust (north) and (west Alpha) projects.

TenneT awards NRG contract for onshore cable connection of Hollandse Kust (West Beta) project

REPowerEU package highlights need for exceptional measures in the current energy crisis 


Installation of the Hollandse Kust (zuid) Beta jacket

Offshore Platform Hollandse Kust Zuid Beta jacket installation

TenneT calls for acceleration of North Sea cross-border wind for European energy independence and security

TenneT expects the ongoing congestion management studies to be completed as of September. The various studies are in full swing and extensive market consultations are currently taking place. The current studies take into account the latest insights from the new Grid Code, which was published by the ACM last week.

Wahle-Mecklar Bauabläufe Fertig gestockter und beseilter Donaumast

TenneT congestion studies update

Celebrating a significant energy transition milestone at the Maasvlakte

Offshore net Hollandse Kust (zuid) Alpha en Beta klaar voor gebruik - Manon van Beek - opening HkZ

Offshore grid Hollandse Kust (zuid) Alpha and Beta ready for use

In the Esbjerg Declaration in May at the North Sea Energy Summit, Germany, the Netherlands, Denmark, and Belgium agreed to jointly install at least 65 gigawatts of offshore wind energy by 2030. Transmission system operator (TSO) TenneT will account for almost two-thirds of this with 40 gigawatts - 20 gigawatts each in the German and Dutch North Seas. Achieving these offshore targets requires a new tender approach to ensure that the supply chain is able to anticipate on necessary investments.

2GW Offshore platform

Large-scale offshore tender sets TenneT on course to deliver 2030 offshore expansion targets 

In the first half of 2022 within a complex and unpredictable external environment TenneT continued its strong efforts to drive the energy transition, investing EUR 1.6 billion in the grid and once again maintaining a high grid availability of 99.999%. Underlying revenue increased by EUR 2,407 million to EUR 4,975 million. 

The cover of the TenneT Half Year Report 2022

Cover TenneT Half Year Report 2022

EUR 1.6 billion of grid investments for carbon neutral future amid strong focus on energy security

New offshore standard set by the 2GW Program will accelerate Europe’s energy transition / With a combined six gigawatts, BalWin1, BalWin2 and BalWin3 will meet 20 per cent of the expansion targets for offshore wind by 2030 set out in the coalition agreement of Germany's new federal government / The three projects in the German North Sea will supply around 7.5 million households with green offshore electricity

Platform at sea

TenneT invites tenders for sea and land stations of the first three German 2 gigawatt grid connections

The Supervisory Board of TenneT Holding B.V. has appointed Arina Freitag as chief financial officer (CFO) of TenneT, the European grid operator whose main activities are in the Netherlands and large parts of Germany. Freitag’s appointment takes effect on 1 January 2022. She will succeed Otto Jager, who has been TenneT CFO since 2013 and in early 2021 announced his decision to leave the company.

Arina Freitag to become TenneT's new CFO

TenneT and Siemens Energy confirm partnership at press briefing to mark next project milestone. TenneT COO Tim Meyerjürgens urges politicians to consistently accelerate grid expansion processes. 900 megawatt grid connection for the transmission of wind energy from sea to land.

The DolWin6 platform during sunset

Offshore Topside Platform DolWin6 kappa.jpg

DolWin6: TenneT's offshore platform about to sail out

Ørsted's Borkum Riffgrund 1 wind farm is the first German offshore wind farm whose produced electricity is fed into the German electricity grid of transmission system operator TenneT in a system-stabilising manner. Following the successful completion of a pre-qualification process, Borkum Riffgrund 1 demonstrates that balancing services can be offered and fed into the electricity grid.

The HelWin 1 offshore converter platform 

Offshore Platform HelWin 1 Converter Platform Germany

Ørsted offshore wind farm is the first to supply balancing capacity to German grid

TenneT will soon be reliably bringing even more green wind power from the German North Sea to land via the direct current connection DolWin6. Europe’s leading offshore transmission system op-erator has now reached the next important milestone on its path to this objective: the sail-out of the 900 MW offshore platform DolWin kappa, which took place on 5 August 2022 from the Dragados Offshore shipyard in Cádiz, Spain.

DolWin-kappa Sailout

DolWin-kappa Sailout (1)

Sail-out completed: TenneT’s 900 MW offshore platform DolWin kappa leaves shipyard in Cádiz

Following a 12-day installation, the offshore converter station is now in place 45 kilo-metres off the coast of Lower Saxony.

DolWin-kappa Installation

TenneT installs 900 MW DolWin kappa platform in the German North Sea

In the context of the European regulation on the internal market for electricity, part of the Clean Energy Package, the European TSOs will conduct a common study into alternative bidding zone configurations, the so-called bidding zone review. Bidding zones are areas in Europe in which a single (wholesale) electricity market price applies. 

TenneT Donaumast

TenneT Donaumast.jpg

TSOs propose methodology, assumptions and alternative configurations for the upcoming European bidding zone review

In the context of the European Electricity Regulation, part of the Clean Energy Package, the European Transmission System Operators (TSOs) for electricity have to conduct a common study into alternative bidding zone configurations, the so-called Bidding Zone Review.

Control Room of the Future

Control Room of the Future 1.jpg

Bidding Zone Review: TSOs investigate alternative bidding zone configurations

•	Direct current cables for at least ten connection systems for wind energy transmission from sea to land in Germany and the Netherlands   
•	TenneT's 2 Gigawatt program increases and bundles electricity transmission capacities and reduces environmental impact 
•	Investment security, accelerated expansion and development of required resources and supply chains


2GW cables

Offshore cable 2GW

TenneT announces large scale HVDC cable tender for offshore grid connections in the North Sea

Repair work on the Norned cable has been completed. The 580-kilometre high-voltage connection between Norway and the Netherlands is being prepared for return to operations in the coming weeks. The cable is now expected to return to regular operations on 17 October.

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