TSOs introduce possible SuedLink routings

21.02.2019

The SuedLink extra-high voltage line is an integral part of Germany’s future low-carbon energy infrastructure. Major supra-regional projects such as Suedlink are included in the German Federal Requirements Plan Act and are often referred to as “power highways”. In order to reach Germany’s and Europe’s climate goals, they are indispensable to link the windy regions of northern Germany with the consumption centres in the industrially highly developed south. SuedLink is jointly carried out by the two TSCNET shareholders TenneT, the Dutch-German transmission system operator (TSO), and TransnetBW, the TSO from southwest Germany.

The European “Project of Common Interest” (PCI) with an investment volume of around €10bn is planned as a DC underground cable. It comprises two measures with a capacity of 2GW each, from the northernmost federal state of Schleswig-Holstein through western Lower Saxony, northern Hesse and southern Thuringia to Bavaria and Baden-Württemberg respectively. In 2017, TenneT and TransnetBW defined a whole network of possible corridor sections suitable for detailed consideration. On that basis, the Federal Network Agency (Bundesnetzagentur) decided on the cable routes to be thoroughly analysed. In recent months, TenneT and TransnetBW then carried out an in-depth examination and evaluation of these corridor alternatives by applying around 150 criteria.

On 21 February, the two TSOs presented the proposed corridor and the other corridor options derived from their study to the Network Agency. “With the detailed studies of the possible corridor variants, we have now identified a specific underground cable corridor that has the smallest possible impact on humans and nature,” explains Manon van Beek, CEO at TenneT. To give all interested parties the opportunity to inform themselves in advance, TenneT and TransnetBW publish the overview maps of the proposed corridor and the grid of all possible corridors on their respective project websites. Numerous dialogue events are to follow. “Transparency is one of our highest priorities,” comments Dr. Werner Götz, CEO at TransnetBW, on this procedure.

TenneT and TransnetBW present possible corridor variants for SuedLink (picture: TenneT)

Linkup
> See TenneT press release (html)
> See TransnetBW press release, in German (html)

See article on single page

TenneT and Gasunie present “Infrastructure Outlook 2050”

15.02.2019

Electricity grids in Europe are increasingly confronted with the fluctuating feed-in of renewable energies. Consequently, they need more flexibility, which can be provided by the comprehensive coupling of sectors such as energy, transport, industry and heat. Many European transmission system operators (TSOs) have identified the integration of electricity and gas transmission infrastructures as a promising approach to fulfilling the requirements of the coming sustainable energy system. Electricity and gases must complement each other, since interlinking both grid types creates new storage possibilities and also provides additional transport options for renewables. Both factors will help to keep energy supplies reliable and affordable also in the low carbon energy future.

TSCNET shareholder TenneT, the Dutch-German TSO for electricity, and Gasunie, the Dutch TSO for gas, each operate grids in the Netherlands as well as in Germany. Last year they entered into a sector coupling partnership with plans for the Power-to-Gas (PtG) pilot plant “ELEMENT ONE”. Now the TSOs have presented their joint “Infrastructure Outlook 2050”. It clearly illustrates that the existing electricity and gas infrastructures in the Netherlands and Germany continue to play a decisive role in coping with the increase in renewable energies and achieving the Paris climate targets. The main conclusion of the joint TSO study is that electricity and gas networks must be more closely interconnected by 2050 in order to meet the objectives. The Outlook is also the first document of its kind to consider various scenarios for the future development of energy supply.

The importance of hydrogen from PtG technologies for energy storage and transport is also highlighted. But even despite the potential of sector integration, further expansion of the electricity grid remains essential, as all scenarios envisage a significant increase in the necessity of electricity transport. In addition, however, there must also be backing from political decision-makers and the creation of a clear, supportive regulatory framework. Manon van Beek, CEO at TenneT, argues that “energy systems are not converted overnight but require sustained, joint efforts”. She therefore sees the need for close cooperation between all those involved in the energy market. In this respect, the “Infrastructure Outlook 2050” represents a “solid, joint start with fresh insights”.

TenneT and Gasunie present the “Infrastructure Outlook 2050” on developing and coupling of transmission infrastructures (picture: Gasunie)

Linkup
> See TenneT press release (html)
> See TenneT press release, in German (html)
> Open “Infrastructure Outlook 2050” (pdf, 45.28Mb)

See article on single page

Hybridge to couple energy sectors

11.02.2019

Last summer, TSCNET shareholder Amprion, one the four German transmission system operators (TSOs) for electricity, and Open Grid Europe (OGE), German TSO for natural gas, announced a collaboration in the field of sector coupling by means of power to gas (PtG) facilities. PtG technologies offer promising perspectives for a low-carbon energy future. Now the two partners are ready to launch the sector coupling at system level in Germany with the project “hybridge” comprising an electrolyser in the 100MW class and a hydrogen infrastructure.

At a joint press conference on 11 February in the German capital of Berlin, the current status of hybridge and further steps were presented. Since the partners, who estimate the costs for the entire project at €150m, are ready to enter the approval phase, Dr. Klaus Kleinekorte, CTO at Amprion, explained that the regulatory framework must now be set up quickly. The more so, as it is crucial for the German climate targets that PtG is available in the GW range from 2030. “The ball is in the court of politics. If the course is set now, the plant can already go into operation in 2023,” commented Dr. Kleinekorte.

The ideal location for the first PtG plant in the projected size, in which electricity from renewable energies is converted into green hydrogen and partly further into green methane via an electrolyser, was found at an intersection between the Amprion and OGE grids in the district of Emsland in the northwest of the German federal state of Lower Saxony. The regional natural gas storage facilities, which can be converted to hydrogen in the future, also contribute to optimal conditions for the development of a hydrogen grid to complement the 100MW electrolyser. Amprion and OGE intend to further develop an existing OGE pipeline for the exclusive transport of hydrogen. The concept of Amprion and OGE for sector coupling at system level also includes non-discriminatory third-party access for all market participants to the planned grid coupling infrastructure.

Amprion and the gas-TSO Open Grid Europe are ready to launch their joint sector coupling project “hybridge” (picture: Amprion; from left to right: Dr. Thomas Hüwener, Member of the OGE Management Board, and Dr. Klaus Kleinekorte, CTO at Amprion)

Linkup
> See Amprion press release, in German (html)

See article on single page

Automobile batteries to stabilise the grid

07.02.2019

Automobile battery storage systems can be employed for system stabilisation and thus substitute large power plants. This is the encouraging result of a joint research project successfully conducted by the Daimler subsidiary Mercedes-Benz Energy and TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO). The pilot was carried out in the Daimler battery test laboratory in Kamenz, a small Saxon town near Dresden, with funds from the innovation programme “Smart Energy Showcases. Digital Agenda for the Energy Transition” (“Schaufenster intelligente Energie. Digitale Agenda für die Energiewende” – SINTEG) initiated by the German Federal Ministry for Economic Affairs and Energy.

The impetus for this research, as well as for other TenneT innovation projects, derives from the energy transition, which has brought about two decisive changes for the TSOs: the loss of reactive power due to the shutdown of large power plants and the volatility of renewable energy generation. Still, generation and consumption need to be balanced in the grid in order to maintain the 50Hz frequency. In this respect, vehicle-to-grid technologies are a promising approach to providing enough primary balancing power.

The prototype storage system installed in the laboratory is based on lithium-ion automobile batteries with a total connected load of approx. 1MW and a storage capacity of 750kWh. It is connected to a specifically constructed test grid. The test runs in Kamenz have shown that such battery storage systems are suitable for highly dynamic system support, since they respond to a frequency deviation in less than 100 milliseconds. They are also employable for system recovery, even for the start-up of entire power stations, e.g. after a major power failure. In this case, they can function as a kind of starter battery and restart the inert rotating masses of a power station. The project partners verified this by simulating a power failure in the test grid, which was restored afterwards with the automobile battery storage system.

TenneT and Mercedes-Benz Energy have conducted a research project on the use of automobile battery systems for grid stabilisation (illustration using a picture provided by Mercedes-Benz Energy GmbH)

Linkup
> See TenneT press release (html)

See article on single page

Revised Network Development Plan for Germany

04.02.2019

The four German transmission system operators (TSOs) and TSCNET shareholders 50Hertz, Amprion, TenneT and TransnetBW today have published the first draft of the new 2019 version of their “Network Development Plan (NDP) 2030” on their joint NDP website. All the different scenarios of the NDP meet the German official 65 percent target for renewables in gross electricity consumption, but differ in terms of the use of innovative technologies, storage technologies and flexibility options. Irrespective of this, a further increase in the internal German electricity market gap can be observed in all scenarios – with cumulative generation in the north and consumption centres in the south and west.

In response to the increase in required transport capacity estimated at around 11GW – due to the expansion of renewables, the significant reduction in the use of coal for electricity generation and the development of the European electricity market – the TSOs consider the construction of two additional major DC lines with a total length of 1160km to be necessary. These two extra lines with a total capacity of 4GW were not part of previous NDPs and go beyond the current German Federal Requirements Plan. The new lines are foreseen to run as underground cables in a corridor from the federal state of Schleswig-Holstein via Lower Saxony and North Rhine-Westphalia to Baden-Württemberg. They are part of the scenario B 230, in which the German TSOs propose to build altogether more than 4500km of new or upgraded power lines by 2030 (the abovementioned 1160km of the new DC lines plus an additional 450km of new constructions and 2900km of upgrades).

The costs for the expansion of the German extra-high voltage grid in the B 230 scenario will rise significantly as a result of the new projects. The TSOs estimate the costs at around €52bn. As in previous years, the Offshore Network Development Plan was drafted together with the NDP and integrated into the new NDP 2030. The NDP publication marks the start of a four-week public consultation. The comments will be taken into account for the second draft of the NEP 2030, which will then be submitted to the Federal Network Agency for review. The Agency is expected to announce its modified plans probably in May, after which the Federal Government will have to confirm the expansion in the official Federal Requirements Plan.

The four German TSOs present a revised Network Development Plan 2030, which provides for a total of 4500km of new or upgraded power lines (picture: Amprion GmbH / Haslauer)

Linkup
> See Amprion press release (html)
> See TransnetBW press release, in German (html)
> Visit the Grid Development Plan website (html)

See article on single page

TenneT performs blockchain pilots successfully

29.01.2019

The energy transition demands digital transition – the number of renewable sources is increasing, while in the future there will be less and less conventional plants available to ensure the required flexibility and stability in the grid for which the transmission system operators (TSOs) are responsible. As such, the Dutch-German TSCNET shareholder TenneT is constantly seeking new decentralised sources that can replace lost flexibility. In addition to wind and solar energy, these can include batteries, industrial plants or cogeneration. This is where digitisation comes in, because only through so-called “aggregator” and block chain technology the capacity and potential of all these sources can be combined and fully utilised.

TenneT has launched two pilot projects last year, one in the Netherlands and one in Germany, both employing blockchain technology. In the first case, e-vehicles and in the second case household batteries were used to balance the grid and avoid congestions. The blockchain application is an IBM development and the Dutch green electricity supplier Vandebron is the cooperation partner in the Netherlands. Vandebron provides battery capacity from e-car charging sessions at TenneT’s request. In this way, the TSO can draw on an additional electricity pool. In Germany, TenneT collaborates with Sonnen E-services, a company specialising in home energy storage systems. Decentralised household batteries from Sonnen are integrated into the TenneT network via a blockchain and interconnected. Through the smart use of these batteries, Sonnen contributes to facilitating power transmission in Germany.

Since both blockchain tests were successful, TenneT and IBM have signed a contract for the further development of blockchain technology. The companies will intensify the implementation so that many more parties can gain access to the electricity market. Three new partners have already been won as additional “aggregators” to ensure improved matching of electricity supply and demand. TenneT CEO Manon van Beek explains that the TSO offers not only “a new way of integrating decentralised sources”, but also “private individuals a good opportunity to participate actively in the energy transition, making the energy transition more affordable together”.

TenneT has successfully conducted two blockchain research pilot projects (picture: Sonnen GmbH)

Linkup
> See TenneT press release (html)

See article on single page

Agreement on minimum capacity at Danish-German border

25.01.2019

In July 2017, the Danish Ministry of Energy, Utilities and Climate and the German Ministry for Economic Affairs and Energy adopted a joint declaration on the increase of cross-border electricity trade between Western Denmark and Germany. The competent transmission system operators (TSOs), the TSCNET shareholders Energinet from Denmark and TenneT, the Dutch-German TSO, subsequently agreed to implement a joint countertrading programme. Energinet and TenneT have been meeting the requirements of the joint declaration since July 2017 and have since ensured minimum available hourly capacities for both directions at the border.

In addition, TenneT has committed itself to the European Commission (EC) in 2018 to further expand the coordinated trade programme and to implement the corresponding EC decision in cooperation with Energinet from January 2019. In order to better comply with TenneT’s additional obligations from the commitment, the two TSOs have now signed an extended agreement supporting TenneT in doing so.

Energinet and Tennet signed an extended agreement on guaranteeing minimum capacities for cross-border trade

Linkup
> See Energinet press release (html)

See article on single page

MIGRATE and PROMOTioN workshop in Berlin

22.01.2019

The consortia of two innovative grid-related research projects funded under the EU Horizon 2020 programme – MIGRATE and PROMOTioN – invite to their first joint workshop entitled “Technical challenges and recommendations for the future European power grid”. Both projects aim to maintain security of supply, grid stability and reliability in times of large scale renewable energy integration. The event takes place on 28 February 2019 at the Maritim Hotel near the Brandenburg Gate in the heart of the German capital of Berlin.

The MIGRATE project (“Massive InteGRATion of power Electronic devices”) comprises 23 partners from 13 European countries, including the transmission system operators (TSOs) and TSCNET shareholders Amprion (Germany), ELES (Slovenia), and TenneT (Germany and the Netherlands). The aim of MIGRATE is to explore technology-based solutions for the current and future technological challenges to the transmission system, in particular by linking generation and consumption via power electronics.

The PROMOTioN project (“PROgress on Meshed HVDC Offshore Transmission Networks”) seeks to further develop innovative technologies relevant for the deployment of meshed offshore HVDC grids. Its specific objective is to improve the cooperation between grid operators and major suppliers for a technical architecture and interoperable technologies to accelerate HVDC grid development. As the largest energy project in Horizon, the consortium includes 33 partners from 11 countries, among them TenneT and further TSCNET shareholder Energinet, the Danish TSO.

The first joined workshop of the European research projects MIGRATE and PROMOTioN will be held in Berlin on 28 February

Linkup
> See ELES press release (html)
>Visit MIGRATE or PROMOTioN website (html, both with access to event agenda and registration)

See article on single page

Record wind power feed-in for 50Hertz

16.01.2019

While last weekend’s windstorm “Florenz” with its masses of snow posed great challenges to the European Alpine countries – and thus also to the transmission system operators (TSOs) based there – the north German coasts and low mountain ranges were hit by stormy, sometimes heavy gusts. 50Hertz, the north-eastern German TSO, whose control area includes such geographical ranges, reports a welcome side effect of “Florenz”: a new record in wind energy feed-in.

On 13 January at 8.45 p.m., the TSO’s grid management for the first time recorded more than 16,000MW in the 50Hertz grid. Thus, the very current record level of New Year’s Day 2019 was even surpassed. At that moment on 13 January, the grid area of 50Hertz could theoretically have been completely supplied with wind energy and there still would have been additional export capacities.

“The value has shown us once again that we as a company together with our neighbouring networks and partners are well prepared for such extreme situations. The grid can withstand such loads,” says Andreas John, Head of System Management at 50Hertz. His team at the Transmission Control Centre in Neuenhagen near the German capital of Berlin had the situation well under control any time.

The windstorm “Florence” led to a new record in the feed-in of wind energy in the control area of 50Hertz (picture of the 50Hertz Transmission Control Centre: Jan Pauls / 50Hertz)

Linkup
> See 50Hertz press release, in German (html

See article on single page

Successful tests for the HeatFlex project

15.01.2019

Volatile and decentralised energy generation is an essential characteristic of the energy future. What is at first an evident risk to grid stability, could also prove to be an opportunity for smart and flexible grid management, since small and decentralised consumption devices, if actively involved, could even help to stabilise the grid. In order to explore this potential, TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), and the southern German distribution system operator (DSO) Bayernwerk Netz GmbH have launched HeatFlex last summer, a research project to increase the flexibility and stability of the entire transmission system.

TenneT and Bayernwerk jointly investigate how decentralised devices can be involved most effectively. The power users that HeatFlex is concerned with are, for example, electric storage heaters, heat pumps, water heaters and potentially also electric vehicles in the Bayernwerk area. They can be controlled by the DSO using ripple control. If a bottleneck in the transmission grid is to be expected, for instance due to a lot of wind power, decentralised consumption devices are used for grid control: At TenneT’s request, they will be triggered by Bayernwerk and then cease consuming too much electricity but instead supply the grid with the necessary electricity for stabilisation.

There are over 170,000 decentralised controllable devices with a total capacity of around 200MW in the Bayernwerk distribution area. A first test in summer already proved the technical feasibility of HeatFlex in cases of real bottleneck situations. It turned out that the communication between the control centres of both operators worked quickly and efficiently. “With this project, we are testing solutions for tomorrow already today. HeatFlex is one of the pilot projects with which we are investigating which decentralised flexibilities we can use in the future to stabilise the grid. These include, for example, projects with power-to-gas, with bidirectionally chargeable electric vehicles or with home storage and blockchain technology,” explains TenneT Managing Director Wilfried Breuer.

HeatFlex, the joint research project of TenneT and Bayernwerk on flexible grid control, is making progress (picture: Bayernwerk AG)

Linkup
> See TenneT press release, in German (html)

See article on single page