“RiffReporter” story: The more precise the forecast, the less intervention is required

11.12.2018

A detailed article by freelance journalist Daniela Becker on the German reportage website RiffReporter, an innovative and award-winning project for “quality journalism on future topics”, presents TSCNET Services and the work of a Regional Security Coordinator (RSC) for the European power transmission grid. The article is based on thorough research and a talk with the two TSCNET managing directors, Maik Neubauer and Uwe Zimmermann. Besides the development of the company, the possible consequences of the EU package “Clean Energy for All Europeans” are also discussed.

An article on TSCNET Services has been issued on the reportage platform RiffReporter (picture: TSCNET Services / Quirin Leppert)

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> Read RiffReporter article, in German (html)

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Coupling of renewables and PtG for climate targets

11.12.2018

In order to achieve ambitious climate targets, a rapid expansion of renewable energy generation is essential. The German market still has great offshore potential in this respect. However, regenerative expansion makes no sense if the corresponding transport or storage capacities are lacking. TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO), is already known for its sustained efforts to significantly expand the transmission infrastructure in its control area as environmentally friendly as possible. But the TSO is also very active in the development of storage concepts, just consider, for example, the storage potential of the North Sea Wind Power Hub project or the “ELEMENT ONE” power-to-gas (PtG) pilot plant.

Together with Siemens and Shell, both global players in their respective fields, Tennet is now making additional efforts to promote the renewables as well as PtG. The three companies are convinced that green hydrogen will play a decisive role in the future energy mix as the basis for many power-to-X applications, which are technologies for storage and other uses of surplus electricity. TenneT, Siemens and Shell have thus commissioned a study on a new type of tender model for offshore wind capacity. This model intends to link the awarding of contracts for the operation of offshore plants to the production of hydrogen: The additional wind power from such facilities should not put too much strain on the onshore grid, but rather be used to generate hydrogen and even stablise the electricity grid. The green hydrogen can be transported via the gas grid and then be used in other sectors, such as industry or mobility.

Lex Hartman, Managing Director of TenneT, is determined to not squander any potential for renewable energies and convinced that PtG technologies provide flexibility, reduce the strain on the grid and make power supply more secure. “In the long term,” Mr Hartman continues, “the combination with hydrogen production can also be applied throughout Germany to other renewable energies. This advances the energy transition and helps to achieve our climate targets.”

TenneT, in cooperation with Siemens and Shell, proposes to couple offshore wind capacity tenders with PtG storage technologies (copyright photo composition by Stadtwerke Mainz)

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> See TenneT press release, in German (html)

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Households supersede power plants

05.12.2018

It is widely known that the closure of conventional power plants in the course of the energy transition and the resulting decrease in operating reserve pose demanding challenges to transmission system operators (TSOs). They now have to compensate for this lost reserve to ensure stability of the transmission grid and secure the customer supply. In its search for new approaches, TSCNET shareholder TenneT, the Dutch-German TSO, has been cooperating for quite some time with the sonnen GmbH, a company specialising in home energy storage systems. Now a breakthrough has been announced: For the first time, sonnen provides operating reserves throughout Germany with its networked home storage systems.

This means that the currently largest virtual battery, which can compensate for grid fluctuations, goes into operation. This battery works in a unique way: It consists of thousands of individual electricity storage units, which are used for the own energy consumption of their respective households. If there are deviations in the power grid, these batteries automatically arrange themselves into a virtual large battery by means of artificial intelligence. Households are thus capable of performing the same compensation functions as conventional power plants and short-term deviations in the grid can be compensated very quickly. For this reason, sonnen, together with its technology partner tiko Energy Solutions, has been prequalified by TenneT to provide primary control reserve.

The prequalification of the virtual battery system for the primary control power market is subject to the strictest technical and safety requirements. Lex Hartman, Managing Director of TenneT, comments on the innovative technology: “That networked battery storages as virtual power plants are now able to stabilise the grid in the event of frequency deviations, is a further step on the road to increased system integration of renewable energies.”

TenneT has prequalified a virtual battery system consisting of individual storage units for the provision of operating reserve (picture: TenneT)

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> See TenneT press release, in German (html)
> Watch sonnen demonstration video, in German (YouTube)

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SIREN project successfully concluded

03.12.2018

After a term of three years, the Croatian research project “Smart Integration of RENewables” (in short: SIREN) has been brought to a satisfactory completion by the project partners, one of whom is TSCNET shareholder HOPS, the transmission system operator (TSO) from Croatia. Together with the Croatian Science Foundation, HOPS was also the funder of the scientific research on the optimisation of current and the development of new system management strategies for the large-scale integration of volatile electricity capacities from renewable sources.

An assessment of the capacity of the transmission grid and the production units was carried out in order to determine flexibility requirements. As second part of the project, the potentials of energy storage units in the transmission system – e.g. pumped-storage power plants, battery systems or flywheels – were evaluated. Finally, also regulatory aspects of the large-scale integration of storage solutions were subject of the research.

Notwithstanding the successful and timely development of solution models and implementation propositions, HOPS will by no means cease its activities in this future-oriented sector. The H2020 project within the CROSSBOW project (“CROSS BOrder management of variable renewable energies and storage units enabling a transnational Wholesale market”), in which HOPS is actively involved, is a kind of continuation of SIREN. The multi-partner project CROSSBOW with a focus on Southeast Europe was launched in November 2018 in the Bulgarian capital of Sofia, with HOPS presiding over one subproject and one working package.

The SIREN project on the integration of the renewables and grid optimisation has been successfully completed

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> See HOPS press release, in Croatian (html)
> Visit SIREN website (html)

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Amprion upgrades historic line

26.11.2018

The power line from Reutlingen-Rommelsbach to Herbertingen in the German state of Baden-Württemberg crosses the southwestern ridge of the Swabian Alb on a length of 61km. Dating back to the 1920s, the overhead line operated by Amprion, one of the four German transmission system operators (TSOs), is an innovative pioneering achievement in the German transmission grid. Already in the Weimar Republic (the German state from 1918 to 1933), it was used to balance electricity between generation and consumption by connecting the Rhenish mining area with water storage facilities in the Alps.

Now it no longer meets the requirements of the energy present and future. TSCNET shareholder Amprion is therefore dismantling the old line and replacing it with new pylons and conductor ropes. Instead of the current 380 and 220kV circuits, the line will in future be equipped with two 380kV circuits. It will then enable an improved exchange of electrical energy between the wind power generation sites in the north, consumers in the residential and industrial areas, and pumped storage plants in the Alps. The line will thus strengthen regional supply as well as supra-regional transmission and is an important component of the energy transition.

A symbolic cut of the spade on 23 November in Zwiefalten-Sonderbuch on the Swabian Alb marked the official opening of Amprion’s currently largest construction site. Over the next two years, 221 old pylons will be dismantled and 181 new ones will be built. The key figures of the construction project are impressive: The TSO is investing a total of around €85m, and over 11,000 tonnes of steel, thousands of tonnes of concrete foundation and around 1500km of aluminium conductor rope will be used along the route. Due to the significance of the Reutlingen-Herbertingen line for industrial history, four old masts will be preserved as industrial monuments.

Amprion is completely rebuilding the historic Reutlingen-Herbertingen overhead line and improving it for the energy future (picture: Amprion, exemplary picture of line installation work)

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> See Amprion press release, in German (html)

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WindNODE flexibility platform in trial operation

21.11.2018

The energy transition results in a rapidly growing share of volatile electricity volumes from renewable energy generation. The participants in the energy market are thus faced with new and challenging tasks that go beyond the mere safe operation of electricity grids. Optimum capacity utilisation and maximum use of renewable, weather-dependent energy instead of the throttling of sustainable plants are key requirements of today’s market. The TSCNET shareholder 50Hertz, one of the four German transmission system operators (TSOs), meets the new challenges through the systematic use of flexibility.

A single example from 2017 shows the extent of today’s throttling measures: 641GWh of renewable power generation were throttled in the 50Hertz control area for grid stability reasons. In order to use otherwise lost energy, more than 70 partners from all over East Germany are working on the WindNODE project promoted by the German Federal Ministry for Economic Affairs and Energy. A central component of the project is the flexibility platform, a digital procurement system that is designed to reduce the throttling of wind turbines in the event of grid bottlenecks. Via the platform, regional generators, consumers and storage operators offer TSOs and distribution system operators (DSOs) flexible use of their facilities. TSOs and DSOs cooperate closely in the project.

The flexibility platform has now gone into test operation after almost two years of developing. The intention is to balance the load distribution of volatile generation quantities and to integrate them optimally into the system. By connecting or disconnecting flexible loads – for example industrial production facilities – the power consumption at appropriate grid nodes is regulated in such a way that bottlenecks and thus the throttling of wind energy are prevented and maximum use of green electricity is facilitated.

Dr. Dirk Biermann, Chief Markets & System Operations Officer at 50Hertz, emphasises the importance of both, more efficient use of the existing grid and grid extension, to achieve the German government’s renewable share targets. “We need to get into Power-to-X applications and the systematic use of flexibility. This is why the WindNODE platform comes at the right time and can help to effectively use regeneratively generated ‘excess electricity’ instead of throttling it.”

The WindNODE flexibility platform for effective use of renewable energy and congestion management in east Germany has been put into trial operation

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

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Approval for upgrade of Weinviertel line

12.11.2018

Transparent and comprehensible planning, extensive information for communities, landowners and residents, and the sustainable consideration of environmental interests – the efforts of the Austrian TSCNET shareholder APG have paid off: The national transmission system operator (TSO) has been validly approved to modernise and upgrade the overhead line through the Weinviertel (“wine quarter”) in the northeast of Lower Austria. APG is investing €200m in the project and construction will start in summer 2019.

The increase in capacity of the more than 70-year-old line from 220kV to mostly 380kV is to be accompanied by the bundling of infrastructure, which results in a reduction of 15km of line and 53 pylons and thus relieves the population and nature reserves. In addition, the new line will be connected to the regional distribution grid via a new substation to be built in Neusiedl/Zaya. This will significantly improve the quality of the electricity supply in the Weinviertel and is a precondition for the further integration of wind and solar energy in Lower Austria.

Dr. Ulrike Baumgartner-Gabitzer, CEO of APG, comments on the approval: “We are happy about this result as a consequence of a very transparent process involving all parties concerned.” Gerhard Christiner, CTO of the TSO, emphasises the importance of the upgrade both for supply security as well as the integration of renewables and adds: “The Weinviertel line is an essential component for the realisation of the energy and climate strategy #mission 2030 adopted by the Austrian Federal Government.”

APG has received approval to upgrade the Weinviertel line in Lower Austria (picture: photo composition)

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> See APG press release, in German (html)

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Construction start for Wilhelmshaven-Conneforde line in Germany

09.11.2018

The power line from Wilhelmshaven on the German North Sea coast to the Conneforde substation in Ammerland, both in the federal state of Lower Saxony, is one of those line projects in Germany that are urgently needed to extend the transmission capacities for wind energy from northern Germany to the consumption centres in the south and west. Moreover, the 380kV line is one of the German pilot projects for partial underground cabling in the three-phase current range. It will be around 30km long and comprise 60 pylons. In two sections, underground cables will be laid over a length of around 5.3km.

TSCNET shareholder TenneT has now begun construction of the new line with a symbolic turning of the first sod in Conneforde. The Dutch-German transmission system operator (TSO) by no means celebrated its first new construction in recent times: “This is already the fifth grid expansion project in Lower Saxony for which we can officially start construction within one year,” explains Lex Hartman, Managing Director of TenneT. Also the Fedderwarden substation (near Wilhelmshaven) is yet to be built. The scheduled commissioning date for line and substation is 2020.

To create transparency in the design process, TenneT involved the interested public, citizens as well as public stakeholders, much more in the planning than the formal procedure would have prescribed. In three years, the TSO has organised nine information markets along the route and conducted numerous individual discussions. “It is our central concern to harmonise our projects as closely as possible with the country and its people, while realising a secure energy supply for the benefit of electricity consumers,” explains Mr Hartman.

From left to right: Andreas Wagner, Lord Mayor of Wilhelmshaven; Dr. Maren Bergmann, Project Manager at TenneT; Rolf Neuhaus, responsible Head of Department at the District of Friesland (picture: TenneT)

TenneT celebrates the construction start of the powerline project Wilhelmshaven-Conneforde (illustration based on screenshots taken from a TenneT video on YouTube)

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> See TenneT press release, in German (html)

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Successful test for the Combined Grid Solution

09.11.2018

The Combined Grid Solution is a joint offshore connection project by the two TSCNET shareholders 50Hertz, one of the four German Transmission System Operators (TSOs), and the Danish TSO Energinet. The binational interconnector in the Baltic Sea will integrate the electricity systems of Denmark and Germany by linking the German wind farm Baltic 2 to the Danish wind farm Kriegers Flak. The utilisation of grid connections from offshore wind farms to couple the transmission grids of two countries is nothing less than a world premiere.

The laying of the two submarine cables “150kV-line KFE-BaZ 155“ and “150kV-line KFE-BaZ 156“ was completed at the beginning of July and the two TSOs have now successfully conducted 24-hour testing of both cables. Around noon on 6 November and in the afternoon thereafter, the two cables were energised one after the other up to the disconnector on the offshore substation OSS KFE and now are ready to transport electricity. Sebastian Wagner, Sub-Project Manager Sea cables at 50Hertz, and Energinet’s Project Manager Daniel Johan Brøndum jointly declared: “Everyone in the team worked closely together and delivered to-the-point. We are very happy and celebrate this success together.”

The submarine cables for the Danish-German offshore interconnector Combined Grid Solution of 50Hertz and Energinet were successfully tested (illustration based on pictures of 50Hertz / Sebastian Wagner)

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> See 50Hertz project news (html)
> See Energinet project news (html)

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ELES presents FutureFlow progress

08.11.2018

The EU-funded FutureFlow project explores innovative e-trading solutions for smart cross-border balancing and redispatching in the control areas of four central-south European transmission system operators (TSOs), all shareholders of TSCNET. The project is coordinated by the Slovenian TSO ELES, the other TSO participants being APG from Austria, MAVIR from Hungary, and Transelectrica from Romania. In times of increasing regenerative energy generation and lack of flexibility services from conventional plants, the FutureFlow consortium considers the prosumer as a new source of flexibility for the transmission grid.

A cross-border pilot with 48MW of flexible power capacity in Austria, Hungary, Romania and Slovenia has already proven that the involvement of the prosumers can save regulating energy. In order to communicate these and other results, ELES representatives took the opportunity to promote FutureFlow during the “European Utility Week” in the Austrian capital of Vienna. At the introductory panel “Interoperable Platforms and Data Exchange for Energy Services” on 6 November, mag. Uroš Salobir, Director of the Strategic Innovation Department at ELES, explained with regard to the cross-border integration of the system service markets: “For automatic frequency control, the FutureFlow project offers 60% savings and up to 57% for redispatching.”

Eles promoted the FutureFlow project for smart cross-border balancing and redispatching on the “European Utility Week” in Vienna (picture based on screenshots taken from FutureFlow promotional video)

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> See ELES press release (html)
> Visit FutureFlow website (html)
> Watch FutureFlow promotional video “Prosumers as guardians of the power system” (YouTube)

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