Paper on MRC extension

26.03.2020

The so-called 4M Market Coupling Countries (4M MC) – the Czech Republic, Hungary, Romania and Slovakia – are to be connected to the Europe-wide Multi Regional Coupling (MRC) of the electricity market. This will introduce Single Day-Ahead Coupling across 23 European countries. The initiative to implement the MRC expansion is the DE-AT-PL-4M MC Project, also known as “Interim Coupling Project”. The relevant transmission system operators (TSOs) from Austria, Czechia, Germany, Hungary, Poland, Romania and Slovakia – the TSCNET shareholders 50Hertz, APG, ČEPS, MAVIR, PSE, SEPS, TenneT, and Transelectrica – are part of the project consortium.

The AT-PL-4M MC Project establishes implicit capacity allocation based on Net Transfer Capacity (NTC) at six borders (PL-DE, PL-CZ, PL-SK, CZ-DE, CZ-AT, HU-AT). The Nominated Electricity Market Operators (NEMOs) and TSOs participating in the DE-AT-PL-4M MC Project now have published an information paper for market participants containing key information on the project in a question and answer format. This information includes the main expected changes for the market, the planned communication methods with market participants and a high-level technical description of the market design to be implemented by the project.

The partners of the AT-PL-4M MC Project for integrating Czechia, Hungary, Romania and Slovakia into MRC have published an information paper

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> Open AT-PL-4M MC information paper provided by MAVIR (pdf, 732.98kB)

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Borssele Beta platform topside ready for sail out

20.03.2020

In the Borssele offshore wind farm area in the south-western part of the Dutch North Sea, Borssele Alpha, the first and largest connection system for wind farms from the Dutch-German transmission system operator (TSO) TenneT in Dutch territorial waters, is already in operation. Now the TSCNET shareholder is in the process of installing Borssele Beta to connect further wind farms, in this case Borssele III and IV that are still under construction. The topside of the offshore transformer platform for Borssele Beta is now ready for shipping. It was built at the construction yard of the offshore platform specialist HSM Offshore in Schiedam in the Rotterdam-The Hague metropolitan area and will be put to sea on 22 March 2020.

When the pontoon carrying the 3,650-tonne superstructure arrives at its destination, a crane vessel will place the top side on the platform substructure (jacket). The top side comprises three interior levels and an outer deck. It is 25 metres high, 58 metres long and 32 metres wide. The Borssele Beta grid connection will have a capacity of 700MW and is scheduled to be commissioned on 1 September 2020. The Borssele III, IV, and V wind farms, which are located about 22km from the coast, will be connected to this transmission system. Borssele V by the Two Towers consortium has been designated as an innovation site within the wind farm zone and will be connected to Borssele Beta. The electricity generated by these offshore wind farms will then be transported ashore via two 67-kilometre-long cables to the high-voltage transformer station near the town of Borssele in the Dutch province of Zeeland.

Marco Kuijpers, Director Offshore Projects a TenneT, comments on the TSO’s progress in offshore expansion: “With this platform, the offshore grid that TenneT is building in the Dutch North Sea is definitively taking shape. Borssele Beta is the second offshore grid connection built by TenneT. Over the coming eight years we will build a new offshore connection every year. I am proud that we are able to make such a significant contribution to the energy transition in which offshore wind energy plays a crucial role.”

TenneT also assumes a marine ecological responsibility and makes its offshore platforms available for other uses. The TSO cooperates in this respect with the Dutch Directorate-General for Public Works and Water Management (Rijkswaterstaat). The Borssele Beta offshore platform therefore also features a Maritime Information Provision Service Point (MIVSP). This is a monitoring station with various monitoring systems, such as nautical radars, meteorological systems and ecological monitoring systems. Similar stations are being installed on every TenneT offshore transformer platform.

The topside of the offshore transformer platform Borssele Beta of TenneT is constructed and ready for shipping (picture: HSM Offshore)

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> See TenneT press release (html)

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Grid and supply security in times of COVID-19

16.03.2020

Transmission system operators (TSOs) are managing an integral part of our society’s systemically relevant critical infrastructure, which must be maintained under all circumstances. In the current global health crisis, the TSCNET shareholders, like all other TSOs, are aware of their specific responsibility for the security of European electricity supply, which is a matter of preserving social and economic life. The TSOs are focusing on their core business: secure electricity supply, and have taken technical precautions, especially in sensitive areas such as the control centres. But of course, hygienic and social measures are also adopted with regard to the safety of their customers, business partners and employees.

As far as the TSO’s own employees are concerned, as many colleagues as possible are sent to work from home. For a large number of technical staff, e.g. in the areas of monitoring, maintenance or repair, this is obviously only possible to a limited extent. The four German TSOs for example have taken a number of precautionary measures. These include in particular:

  • Strict rules regarding business trips and contact with other persons.
  • Special requirements apply to the staff in the control rooms and in the technical teams which are absolutely necessary for the maintenance of the grid. Generally speaking, the control rooms are equipped for all emergencies, far beyond the current threat from the corona virus.
  • The precautionary measures taken are checked daily and adjusted to the current situation if necessary.
  • The individual TSOs also adapt their measures in accordance with the rules and regulations applicable in their respective grid areas.

To play an active role in the containment of COVID-19, the TSOs also respond with such understandable measures as access restrictions or the cancellations of meetings and public information events. Instead, the companies are opting for online conferences. 50Hertz, for example, one of the four German TSOs, is introducing an online participation system as a replacement for the cancelled information events for example on the transregional SuedOstLink power line so that citizens can be continuously involved in the planning process.

The European TSOs contribute actively and responsibly to the containment of SARS-CoV-2 without compromising system security (electron microscope image of SARS-CoV-2: NIAID, CC BY 2.0)

Linkup
> 50Hertz, in German (html)
> APG, in German (html)
> Energinet, (html)
> TenneT Germany press release, in German (html, published on 17 March)
> TransnetBW, in German (html)

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TenneT creates, invests and researches for the energy future

12.03.2020

Promoting the energy transition is a priority objective of TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO). This is clearly reflected in the TSO’s just-published Integrated Annual Report. As in recent years, the Annual Report is accompanied by the Green Finance Report 2019.

In line with the energy policy and climate goals of the Netherlands and Germany, TenneT increased its investments yet again in 2019 and spent €3.1bn on the energy transition and supply security (grid availability of 99.9998% in 2019). This financial commitment is even to be stepped up: TenneT is planning annual investments of €4bn to €5bn for the future. The financial performance of the company, with revenues of €4.1bn in 2019 and an EBIT (excluding special effects) of €753m, supports these ambitious plans. Manon van Beek, CEO of TenneT, has every reason to be content with the sound development of the TSO: “We have made great strides again in pursuing our ambition to achieve a sustainable energy future for everyone. Not only in realising and developing new onshore and offshore connections, but also by the required far-reaching international cooperation and working on innovations in close coordination with relevant stakeholders.”

As regards offshore connections, TenneT has already exceeded in 2019 the German government’s expansion target for offshore wind power capacity in the North and Baltic Sea, which is 6.5GW for 2020. With last year’s commissioning of BorWin 3, TenneT’s ninth offshore grid connection system in DC technology, the TSO now has a total of twelve offshore grid connections in operation (nine in DC and three in AC technology) with a total capacity of 7.1GW. But TenneT is not resting on its successes to date: The connection systems DolWin5, DolWin6, and BorWin5 are being developed and will increase the offshore transmission capacity provided by TenneT for wind farms in the German North Sea to almost 10GW by 2025. In addition, Borssele Alpha, TenneT’s first offshore connection system in AC technology in the Dutch North Sea, was installed on schedule and is now ready for operation. Borssele Beta will be completed in 2020.

Onshore, TenneT has eight transmission lines under construction in Germany, more than ever before. In the Netherlands, the 60km-long Randstad 380kV North Ring power line was put into operation, reliably supplying Europe’s most densely populated area with electricity and providing transmission capacity for green energy. At European level, the “green” COBRAcable deserves special mention, which since 2019 directly connects the Dutch and Danish markets for the first time. The German and Norwegian markets will also be directly connected by the NordLink cable, which is currently under construction. On top of this, a proof-of-concept for the North Sea Wind Power Hub has shown the technical feasibility of the concept of multiple wind power distribution hubs in the North Sea.

All these grid expansion projects are complemented by innovative solutions and intensive research to better utilise TenneT’s existing transmission system. These include vehicle-to-grid pilots, the deployment of home storage systems in grid stabilisation and digital solutions for higher grid utilisation. Another long-term innovation project is Element One, a 100MW electrolysis plant to be built in Germany to promote an integrated energy system.

TenneT presents Integrated Annual Report 2019 and Green Finance Report 2019 (picture: TenneT)

Linkup
> See TenneT press release (html)
> Visit Integrated Annual Report 2019 site (html)
> Direct access to the report download (html)
> Open Green Finance Report 2019 (pdf, 802.38kB)

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Deep Dig-It trencher at work for TenneT

09.03.2020

The Hollandse Kust (South) offshore wind area in the Dutch North Sea is located 22 kilometres off the coast of the Dutch province of Zuid-Holland. TSCNET shareholder TenneT is responsible for connecting the wind farms under construction there via two corresponding offshore platforms to the onshore high-voltage substation in the industry and port area of Maasvlakte, from where the green electricity is transmitted further to the Randstad 380kV South Ring power line in the Dutch Randstad region, the most densely populated area in Europe, and further.

But there is a major challenge to be met by the Dutch-German transmission system operator (TSO): On the first ten kilometres of the offshore route, the four submarine cables to be laid are crossing the entrance to Europe’s busiest cargo port, the port of Rotterdam. To pass through the busy Rotterdam-Maasmond shipping lane, the cables here must be buried more than 5 metres deep into the seabed. For this specific job, the Dutch maritime contracting company Van Oord designed and built the Deep Dig-It trencher, a gigantic remote-controlled trencher.

Last Friday, final tests were carried out in the Aleksiahaven of Maasvlakte in preparation for the actual laying of the submarine cables in July. The innovative device is a so-called Tracked Remotely Operated Vehicle, which drives unmanned over the seabed, creates a deep trench for the cables, inserts the cables and closes the trench again. The Deep Dig-It is the largest and most powerful machine in its class. The trencher weighs 125 tonnes, is more than 17 metres long, well over 8 metres high and 11 metres wide. This makes it possible to bury cables in very hard ground, while the burial depth that can be achieved with the Deep Dig-It is well over 5 metres.

TenneT employs the powerful Deep Dig-It trencher to connect the Hollandse Kust (South) wind farms to the onshore grid (picture: Van Oord nv)

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> See TenneT press release (html)

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COBRAcable proves to be a great success

06.03.2020

It is now half a year since TSCNET customer Energinet, the transmission system operator (TSO) from Denmark, and TSCNET shareholder TenneT, the Dutch-German TSO, made COBRAcable available to the market. The high-voltage DC cable with a length of about 325km and a capacity of 700MW is the first direct connection between the electricity markets of Denmark and the Netherlands. The basic idea behind COBRAcable is to compensate for the volatility of wind power. Consequently, the Netherlands imports electricity via the cable on days with large Danish wind power generation, while on days with little wind in Denmark the electricity is transported in the opposite direction.

This works perfectly, as the interconnector’s transmission data from the first six-month period prove: In total, Denmark has imported almost 700GWh via the COBRAcable and the Netherlands almost 1,400GWh. On average, COBRAcable was operated at full capacity 79% of the time during the last half year. The impressive traffic on this binational connection proves its adequacy through its operation. The new interconnector therefore substantially contributes to the energy transition by exchanging volatile renewable energy across borders and additionally creates a trading profit on the spot market for electricity – a multiple benefit for nature, society and the companies involved.

The transmission data from the COBRAcable of Energinet and TenneT confirm a high level of traffic on the line (picture: screenshot taken from Energinet-video “Constructing the green COBRAcable”, Vimeo)

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> See Energinet press release (html)

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TenneT concludes successful V2G pilot

04.03.2020

Considering the increase in renewable energies, electromobility represents an additional challenge, but also an opportunity for transmission system operators (TSOs). The decentralised feed-in of renewable energies leads to transport bottlenecks in the transmission grid, but when it comes to balancing power generation and consumption, electric vehicles can contribute to maintaining the balance and security of supply. For this reason, TSCNET shareholder Tennet, the Dutch-German TSO, is intensively researching this field. Together with car manufacturer Nissan and energy service provider The Mobility House, the TSO now has successfully concluded a substantive vehicle-to-grid (V2G) pilot project, which was initiated in March 2018.

As part of a SINTEG (“Schaufenster intelligente Energie” – “Smart Energy Showcases“) project sponsored by the German Federal Ministry for Economic Affairs and Energy, the partners have investigated the potential of electric vehicle batteries in storing and feeding back locally produced electricity in order to stabilise the power grid and at the same time increase the use of renewable energies and save CO2. During the project phase, Nissan electric vehicles were deployed as mobile energy storage systems in the TenneT control area in northern and southern Germany to instantly reduce local overloads in power supply and demand.

The project offers a significant solution to the increasingly frequent bottlenecks. The wind power available in northern Germany was used by electric cars in the region. At the same time, in the south, electricity from fully charged batteries of Nissan LEAF vehicles was fed back into the grid instead of raising fossil generation. These smart redistribution measures were controlled by software from The Mobility House, the smart charge and energy management system ChargePilot, which follows TenneT’s specifications and also considers the mobility and charging requirements of vehicle users.

TenneT managing director Tim Meyerjürgens comments on the V2G research: “The pilot project has shown that we will be able to use electric mobility in the future to flexibly manage renewable electricity production, which is highly dependent on the weather. This relieves the strain on the electricity grid and helps us to limit the expensive throttling of wind turbines. The short-term flexibility, which is thus provided to us by electromobility, can supplement the grid expansion and become an important component of the energy transition.”

TenneT, Nissan, and The Mobility House have successfully concluded a research project on the use of automobile battery systems for grid stabilisation (picture: screenshot taken from TenneT video “Kooperationsprojekt Stabilisierung des Stromnetzes – Vehicle 2 Grid“, YouTube)

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> See TenneT press release, in German (html)

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Dutch communication pilot project for aFRR provision

25.02.2020

The significant growth in decentralised energy generation is noticeably changing the European energy landscape. Consumers are also playing an increasingly active role by generating their own electricity as prosumers. The electricity system is thus changing from a demand-oriented system with centralised generation to a more supply-oriented system with decentralised generation. Maintaining the balance of the future transmission system is thus a major concern of European transmission system operators (TSOs), which could be supported by new players serving the ancillary services market as balancing services providers (BSPs). However, product specifications stand for a barrier to new entrants, for example in the field of data communications.

TSCNET shareholder TenneT, the Dutch-German TSO, is already researching suitable balancing solutions in several projects. TenneT is now also investigating the possibility of allowing decentralised, sustainable electrical energy to participate in the Dutch market for automatic Frequency Restoration Reserve (aFRR). The aFRR delivery requires a real-time data connection. Until now, the only secure and reliable option has been the leased line. This is not a problem for large production units, while for new BSPs the purchase of a leased line is a major barrier to entering the aFRR market.

This is where the aFRR pilot project comes in: For the first time, a new type of data connection was successfully used, whereby the data communication between the market participants and TenneT (for activation and measurements) was realised via TenneT’s mobile network. This removed a major obstacle to the provision of aFRR by (new) BSPs and enabled grid balancing by means of horticulturists, electric boilers and car batteries. TenneT will monitor and evaluate the performance of its mobile network in the coming months. If this is successful, the TSO will make the data connection available as soon as possible to all BSPs interested in using it to supply aFRR.

Tomatoes from Dutch greenhouses keeping the grid in balance – TenneT carries out a pilot project to improve data communication for aFRR supply

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> See TenneT press release (html)

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BorWin3 operation handed over to TenneT

14.02.2020

The offshore grid connection BorWin3 in the German Bight near the island of Borkum has been operational since August 2019. The twelfth offshore grid connection project of TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), extends TenneT’s transmission capacity for offshore wind farms in the German North Sea by a further 900MW, so that the total capacity already amounts to 7.132GW – and since the German government’s expansion targets for wind energy in the North Sea by 2020 are only 6.5GW, the TSO has clearly exceeded them.

After several weeks of trial operation, BorWin3 has now been handed over to TenneT by the general contractors. The consortium of Siemens and Petrofac was responsible for the construction, transport, installation and commissioning of the two BorWin3 converters (offshore and onshore). The transfer of operations represents a further major contribution to the energy transition in Germany and Europe.

At the same time, TenneT is pursuing ambitious goals for its Dutch offshore projects. The TSO is planning on a large scale, as the Dutch government has set a target in its “Offshore Wind Roadmap 2030” to reach a cumulative offshore wind capacity of 11.5GW by 2030, so that 40% of the Dutch electricity demand will then come from offshore wind farms. In the IJmuiden Ver wind energy area, off the coast of the region of North Holland, the company intends to implement two 2GW offshore grid connections to complement the eight 0.7GW AC grid connections already planned in the Dutch North Sea. As there is currently no 2GW grid connection, a new platform design and a high-voltage direct current (HVDC) transmission system that enables increased power transmission are required.

Furthermore, given the long distance to the coast and the size of the IJmuiden Ver wind energy area, a 2GW HVDC solution based on 525kV seems to be the most economically solution. It requires only one cable system per 2GW, which limits the impact on the environment and surroundings. The technology is by no means fundamentally new to TenneT. The TSO can draw on its extensive HVDC experience with offshore grid connections in Germany and with interconnectors. TenneT also uses the 525kV level for NordLink, the new offshore connection between Germany and Norway.

To implement such an innovative DC system, TenneT has initiated the design phase with five HVDC suppliers based on an innovation partnership. These suppliers will develop the advanced 2GW-525kV HVDC solution based on the criteria defined by the company and the technical capabilities of the partners.

The operation of BorWin3 was handed over to TenneT (picture of the offshore converter platform BorWin gamma: TenneT)

Linkup
> See TenneT press release on BorWin3, in German (html)
> See TenneT press release on Dutch 2GW plans (html)
> Watch BorWin3 project movie, in German (YouTube)

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Tennet conducts market survey on grid boosters

07.02.2020

Power generation in Germany is changing rapidly in the course of the energy transition and a 65% share of renewable energies is expected in 2030. To meet the challenge of integrating these quantities of renewables, it is necessary for the four German transmission system operators (TSOs) to supplement the mandatory grid expansion with technical innovations. The higher utilisation of the existing transmission system plays a particularly important role in this respect, because if the generated electricity exceeds line capacities, the TSOs have to carry out costly redispatch measures.

TSCNET shareholder TenneT, the Dutch-German TSO, plans to implement grid boosters, an innovation also considered in the German “Network Development Plan 2030”. The general idea of grid boosters involves fast power sources in the form of large batteries. TenneT’s grid booster concept provides for a higher utilisation of the grid during smooth operation. If a transmission line within the monitoring range of the grid boosters exceeds a predefined limit value, the load of the respective circuit is restored to permanently permissible values within a short time by reactive use of the grid boosters.

TenneT is now conducting a market survey on the grid boosters. The purpose of this enquiry is to prepare for the award of contracts and to inform the market players. All interested parties are invited to participate in this process and to submit a written statement on the intended approach by 31 March 2020 via a platform set up by the TSO. The results of the process should help TenneT to carry out a competitive, transparent and non-discriminatory award procedure.

TenneT invites market players to participate in a market survey on grid boosters

Linkup
> See TenneT press release, in German (html)
> Visit market survey platform, in German (html)

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