TenneT expands German headquarters

18.10.2019

The Dutch-German transmission system operator (TSO) TenneT conducts its German business from Bayreuth. Here, in the capital of the Bavarian administrative district of Upper Franconia, TenneT moved into its new corporate headquarters in 2018 and is now investing a further €20m in a new office building with space for around 220 new employees. Construction began on 17 October 2019 with the symbolic ground-breaking ceremony attended by representatives from regional and national politics, associations, partner institutions and employees.

With the increasing challenges arising for TenneT from the energy transition, the number of its employees is also growing proportionally. Their number has risen significantly in recent years, and this growth will continue. In 2016, around 800 people were employed in Bayreuth, today it is almost 1,200. After the completion of the new building planned for 2021, the TSCNET shareholder will employ more than 1,400 people on the so-called TenneT campus.

“This is a strong signal for the enormous growth of TenneT and a clear commitment to the location in Bayreuth,” explains TenneT CFO Otto Jager. “From here, we will advance the energy transition with grid extension and innovation projects for a secure electricity supply.”

TenneT celebrates the construction start of a new office building on the Tennet Campus in Bayreuth (picture: TenneT; from left to right: Thomas Löw, CTO of the construction company Markgraf, Bayreuth’s Lord Mayor Brigitte Merk-Erbe, TenneT CFO Otto Jager and architect Johannes Jung)

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Randstad 380kV North Ring in operation

14.10.2019

The four largest Dutch cities (Amsterdam, Rotterdam, The Hague and Utrecht) and their surroundings constitute the Randstad region in the Netherlands. With a population of more than 8 million people, it is Europe’s most densely populated area. Randstad has a high energy demand, which needs to be reliably met and secured also in the future. However, infrastructure construction measures are particularly challenging in such a conurbation. TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), has now made an elementary contribution to security of supply of the Randstad.

After a construction period of five years, the 60-kilometer-long Randstad 380kV North Ring power line was put into operation on 10 October. More than 1000 people from the region, 300 landowners, over 25 responsible authorities, 13 contractors and 200 TenneT employees were involved in its construction. The new high-voltage line will reliably supply millions of households and companies with electricity. It will also provide the transmission capacity required for green electricity from North Sea wind farms. As a complementary measure, the existing 150kV connections in the region were adapted and two new high-voltage substations have been built in Beverwijk and Vijfhuizen.

At 151 locations along the route, Tennet installed innovative Wintrack pylons that consume less space, reduce magnetic field zones and, due to their slim and streamlined shape, fit much better into their surroundings than conventional steel lattice pylons. Ten kilometres of the North Ring have been laid underground. The aluminium cables used by TenneT are a novelty. They are cheaper than conventional materials and conduct electricity more efficiently, which means that their carbon footprint is smaller.

TenneT has commissioned the Randstad 380kV North Ring (picture of the opening ceremony with TenneT CEO Manon van Beek and COO Ben Voorhorst: TenneT)

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€215m for green connection capacity

11.10.2019

The Dutch-German transmission system operator (TSO) TenneT plans to invest a further €215m to connect two GW of green electricity from solar and wind farms in the north of the Netherlands to the grid. The infrastructural measures include the construction of two new 380/110kV high-voltage substations in the provinces of Groningen and Drenthe. In addition, the TSCNET shareholder intends to provide extra capacity at nine existing 110kV substations in the northern Netherlands.

One GW corresponds roughly to the output of 3.5 million solar modules or 200 wind turbines. The additional capacity planned by the TSO is therefore considerable, but according to Ben Voorhorst, COO of the TSO, as many solar and wind farm transmission requests as possible should be complied with. Already now TenneT operates projects in the northern Netherlands with a volume of more than €1bn. This level of investment is now being further increased, with the TSO focusing strongly on the sustainability and efficiency of the investments. “The better the capacity expansions of electricity grids are actually utilised, the better the consumer’s money is spent,” explains Voorhorst.

TenneT invests €215m in the connection of renewable energies in the northern Netherlands (picture: TenneT)

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Central project management and office for SuedLink

24.09.2019

The SuedLink extra-high voltage line is not only the most important individual project of the energy transition in Germany, but also the largest underground cable project in the world: Around 700 kilometers of cable will be laid and around ten billion euros invested. By connecting the windy regions of northern Germany with the consumption centres in the industrially highly developed south, “power highways” such as SuedLink are indispensable for achieving Germany’s and Europe’s climate goals. SuedLink is implemented jointly by the two TSCNET shareholders TenneT, the Dutch-German transmission system operator (TSO), and TransnetBW, the TSO from southwest Germany.

In order to efficiently advance the further approval procedure and the subsequent construction of SuedLink, the two TSOs have commissioned the international technical service company Jacobs as central service provider. The aim is to coordinate and control the various tasks such as planning, approval, obtaining easements and construction under one roof. This makes SuedLink the first major project in Germany in which an external central service provider is involved. TenneT Managing Director Tim Meyerjürgens explains why the two partners decided on a model that has proven itself many times in such large-scale projects on the international market: “The schedule for implementation is challenging. At the same time, the expectations of politics and the public continue to rise. For this very reason, controlling and coordination play such an important role.”

The commissioning of Jacobs is accompanied by the opening of the central SüdLink office in Würzburg, Lower Franconia. Together with the central service provider, TransnetBW and TenneT will initially create 130 jobs there, the number of which will rise to 250 in the course of the project. To better incorporate regional knowledge into the planning process, further decentralised project offices are to follow along the route. Dr. Werner Götz, Chairman of the TransnetBW Executive Board, comments on the development: “By commissioning a central service provider and setting up a joint project facility in Würzburg, we have laid the foundations for the successful implementation of this major project.” The staff in Würzburg will include engineers, archaeologists, landscape planners, biologists, geologists, and project managers, all joining forces for Europe’s energy future.

TenneT and TransnetBW commission a central service provider for the implementation of SuedLink (picture: TenneT / Katja Schubert)

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> See TransnetBW press release on the office opening, in German (html)

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Borssele Alpha ready to operate

05.09.2019

Just one month ago, TSCNET shareholder TenneT fully implemented BorWin3 in the German Bight, the twelfth offshore grid connection project of the Dutch-German transmission system operator (TSO). Now there is once again good news for the energy transition, this time from the Dutch North Sea: Borssele Alpha, TenneT’s first and largest connection system for wind farms in Dutch territorial waters, is ready for operation – right on schedule and within budget. From 2020 on, Borssele Alpha will supply the green electricity from the offshore wind farms Borssele I and II ashore.

The two Borssele wind farms will have a capacity of around 700MW. The Borssele Alpha grid connection will transmit the electricity to the substation near the town of Borssele in the Dutch province of Zeeland, where TenneT has built a new transformer station next to the existing station. The Borssele grid connection is TenneT’s first Dutch major project under the National Energy Agreement for offshore wind farms and fully complies with the conditions set out in the Dutch government’s Offshore Wind Energy Development Framework.

According to the Energy Agreement, TenneT will have installed 3,500MW of grid connections for offshore wind farms by the end of 2023. The next project is Borssele Beta, followed by Hollandse Kust (zuid) Alpha and Beta and Hollandse Kust (noord). TenneT’s standardised procedure for offshore connections will make it possible to complete these projects more efficiently, quickly and economically. In line with the Dutch Follow-up Roadmap for Offshore Wind Energy, a further 6,100MW of offshore wind energy will be realised between 2024 and 2030.

The Borssele Alpha offshore grid connection of TenneT is operational (picture: Screenshot taken from the Borssele video)

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COBRAcable market launch on 7 September

02.09.2019

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, which is exactly on schedule. The first direct connection between the electricity markets of Denmark and the Netherlands was jointly realised and is operated by the two TSCNET shareholders Energinet, the Danish transmission system operator (TSO), and TenneT, the Dutch-German TSO.

The high-voltage DC cable with a length of about 325km has a capacity of 700MW. The Netherlands can import more sustainable electricity from Denmark through COBRAcable, mainly wind energy. In addition, the cable provides Dutch capacity on a structural basis for the Danish electricity grid, thus ensuring security of supply in Denmark, which of course also works the other way round. Moreover, the cable connection is designed in such a way that an offshore wind farm can be connected at a later date, so that COBRAcable contributes to a sustainable European energy landscape.

The COBRAcable interconnector of Energinet and Tennet is available to the market from 7 September (picture: screenshot taken from TenneT-video “First pile COBRAcable”, YouTube)

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Start of construction for replacement 380kV line in Lower Saxony

22.08.2019

The competent planning approval authority has granted TSCNET shareholder TenneT, the German-Dutch electricity transmission system operator (TSO), permission to build the 380 kV Emden – Conneforde line. Construction work will now be started immediately. The combined replacement new construction project is regarded as an important element for a successful energy transition – with the decision of the Lower Saxony State Authority for Road Construction and Transport after several years of preparation and intensive citizen dialogue, network expansion in northern Germany continues to pick up speed.

“The new transmission line supports the transport of renewable energy to the high-consumption regions and thus contributes to greater security of supply,” explains TenneT Managing Director Tim Meyerjürgens. The approximately 60-kilometer-long line runs from Emden through four administrative districts and is to run underground on two sections with a total of around five kilometres. Commissioning is planned for 2021. The existing 220kV line between Emden and Conneforde will then be dismantled.

TenneT has received approval for the construction of the 380 kV Emden – Conneforde line and will begin construction immediately (collage using pictures of TenneT)

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TransnetBW order for “bnBm” gas power plant

20.08.2019

TSCNET Services shareholder TransnetBW, one of the four German transmission system operators (TSOs), has awarded Energie Baden-Württemberg AG (EnBW) the contract for the provision of a “special network equipment” (“besonderes netztechnisches Betriebsmittel”, bnBm). EnBW will construct and operate a gas turbine power plant with a capacity of 300MW at Marbach. The city is the birthplace of the poet Friedrich Schiller and is located about 20 kilometres north of Stuttgart on the Neckar River.

The special network equipment will not be available to the market, but will be used from 1 October 2022 as a “safety buffer” exclusively at the request of TransnetBW to ensure safety and reliability in the transmission grid. It thus serves as a further reserve for the safety and reliability of the electricity supply system.

“Behind us lies a demanding tendering procedure, because we had to procure a completely new product,” says Dr. Rainer Pflaum, Managing Director of TransnetBW. It was about access to a capacity that “helps to stabilise the power grid flexibly and reliably”. The new plant would be an important component for supply security in the region.

Together with the TSOs Amprion and TenneT, TransnetBW issued a call for tenders for the special grid technology equipment with a total volume of 1,200MW open to technology and Europe-wide at the end of June 2018. Altogether, the tenders cover four regions in southern Germany, each with a capacity of 300MW.

TransnetBW placed an order for the provision of a gas turbine power plant with a capacity of 300MW (picture: EnBW)

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BorWin3 in operation

12.08.2019

The offshore grid connection BorWin3 operated by TSCNET shareholder TenneT in the German Bight is ready for feed-in since early August. This means that the total transmission capacity for offshore wind farms in the German North Sea is already 7.132GW. The Dutch-German transmission system operator (TSO) has thus not only met the German government’s expansion targets for sustainable North Sea wind power – 6.5GW by 2020 – but has significantly exceeded them.

BorWin3, TenneT’s twelfth offshore grid connection project, brings a further 900MW capacity. After BorWin1 and BorWin2, it is the third connection that the TSO has implemented near the East Frisian island of Borkum using DC technology. The corresponding converter and transformer station were built at TenneT’s Emden/Ost site to feed the green energy into the onshore extra-high voltage grid. BorWin3 bridges a total distance of 160km. The submarine cable is 130km long and the last section ashore to Emden/Ost is completed by underground cabling.

The TSO can be satisfied with its own offshore progress, but TenneT Managing Director Tim Meyerjürgens calls for further efforts, as the current rate of offshore wind expansion in Europe is not sufficient to achieve the goals of the Paris Climate Agreement. “An accelerated, large-scale and internationally coordinated expansion is necessary,” explains Meyerjürgens. In this context, TenneT has just presented a feasibility study of the North Sea Wind Power Hub concept for the implementation of wind power distribution hubs in the North Sea. Meyerjürgens points out that with an internationally coordinated approach the connection and integration of large offshore wind energy capacities could be much more effective and cost-efficient than with continued individual national planning.

In early August, the offshore grid connection BorWin3 of TenneT was put into operation (picture of the offshore converter platform BorWin gamma: TenneT)

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TSO conditions for reserve capacity approved

05.08.2019

The four German transmission system operators (TSOs), the TSCNET shareholders 50Hertz, Amprion, TransnetBW and Tennet, the Dutch-German TSO, ensure the supply of electricity under all circumstances and thus hold reserve capacities as ultima ratio for unforeseeable and exceptional extreme situations on the electricity market. The reserve capacity is calculated at 2GW and the facilities to provide the capacity are determined every two years by the TSOs through a tendering procedure.

Last week, the Bundesnetzagentur (German Federal Network Agency) approved the new standard conditions for the reserve capacity which had been drafted by the TSOs. The standard conditions are the basis of the contractual relationship between the respective TSO and the operator providing the capacity. They are designed to be as transparent as possible and include, among other things, rules on the availability and use of the reserve system, remuneration or contractual penalties.

Due to the standard conditions, the potential participants in the tender procedure know the terms under which the reserve facilities must be operated and the legal consequences in case of failure of a plant. Now that the conditions have been approved, the tender for the first performance period can start as planned on 1 September 2019.

The German Federal Network Agency approved the TSO standard conditions for reserve capacity (picture: Bundesnetzagentur)

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