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380 kV overhead line Pasewalk – Bertikow
380-kV overhead line Güstrow – Parchim Süd – Perleberg
380-kV overhead line Perleberg – Wolmirstedt
380-kV overhead line Pulgar-Vieselbach
380-kV Berlin diagonal power link
380 kV overhead line "Nordring Berlin"
Grid connection of the Jessen/Nord substation
Grid reinforcement of 380-kV high-voltage transmission line Röhrsdorf-Weida-Remptendorf
Combined Grid Solution
Interconnectors and phase shifters
380-kV line Bärwalde – Schmölln
380 kV grid connection to the Förderstedt substation
Wind Bus Bar
Why expand the grid?
Frequently asked questions
Energy Transition Outlook 2035
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Overhead line and cable
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European internal energy market
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Congestion management international
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Disclosure of EEG data
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Measures as per § 13 para. 1 EnWG
Measures as per § 13 para. 2 EnWG
Commercial transactions to balance the redispatch balancing group
Archive Measures as per § 13 EnWG
Redispatch Calculator SWKL
Control reserve (capacity provision)
Control energy (activated balance energy)
Full article: News of 50Hertz
Exploiting instead of curtailing green electricity
50Hertz and Neubrandenburger Stadtwerke are constructing a new installation for climate-friendly heat supply
Gas and turbine power plant of Neubrandenburger Stadtwerke, photo: neu.sw
The power grids in Germany cannot transport the full volume of wind energy at all times of the year, as this would overload the grid. Wind turbines are then at a temporary standstill and the energy remains unused. Transmission system operator 50Hertz together with Neubrandenburger Stadtwerke (neu.sw) now seek to change this. What can be pictured as an oversized electric kettle (Power-to-Heat, P2H), a new installation will in future transform excess green electricity into heat for the city. Both companies have now contractually agreed to construct the plant with a capacity of 30 megawatt by late 2023 on the premises of the Neubrandenburger Stadtwerke. The basis of the collaboration is a regulation from the Energy Industry Act to exploit green electricity instead of shutting down wind turbines. This is the first collaboration of its kind in Germany. The investment costs of about 14 million EuR are borne by 50Hertz, while neu.sw is responsible for the construction and operation of the P2H unit.
To date, significant portions of the electricity and heat supply of the city of Neubrandenburg were covered by a natural-gas-fired combined heat and power generation (CHP) unit that produces electricity and heat at the same time. During periods when an overload of the 50Hertz grid is imminent because too much renewable energy is being generated, the capacity of the CHP will in future be reduced so that the excess wind power can be used. Until now, this would have been linked to limitations in heat supply; however, with the new Power-to-Heat unit, this gap in heat supply can be closed. In the near future, it will therefore be possible to exploit more renewable energy and consume less carbon-containing natural gas, so that a significant amount of the greenhouse gas carbon dioxide can be reduced.
Dr Dirk Biermann, Chief Markets and System Operations Officer at 50Hertz, welcomes the contractual agreement: “We managed to develop a solution that is beneficial for both, the local economy and the consumers of Neubrandenburg. With this project, we are for the first time implementing a coupling of the heat and electricity sectors in the grid expansion area after the introduction of the new legal regulations. As such, both companies make an important contribution to the reduction of the CO2 emissions, which are harmful to the climate, and as such to driving the energy transition forward. We are currently in the final signing stage of similar contracts with power plant operators in Mecklenburg-Western Pomerania, so that all this does not remain a one-hit wonder.”
For Ingo Meyer, CEO of neu.sw, the Power-to-Heat unit is the next step in the green heat transition of the company: “Here in Neubrandenburg, we are located in the middle of the grid expansion area, with many renewable energy installations. We want to use the electricity, as this will make the generation for district heating more eco-friendly in combination with our short-term heat accumulator, which is currently under construction.”
In order to realise this collaboration project, extensive preliminary works were required. The legal framework conditions, for instance, had to be checked and the necessary contractual prerequisites needed to be elaborated. For the Power-to-Heat unit and its connection to the local electricity and heat distribution system, planning documents had to be drawn up and cost estimates needed to be made.
In 2017, the legislative granted the transmission system operators the possibility to contractually agree the construction as well as the operation of a P2H unit with a CHP unit operator. The basis for this is the Energy Industry Act (EnWG). In accordance with §13 (6a) of the EnWG, excess electricity should not be curtailed in the so-called grid expansion area, but transformed into heat using Power-to-Heat technology for further exploitation. The grid exploitation area includes the northern part of Lower Saxony as well as the states of Bremen, Schleswig-Holstein, Hamburg and Mecklenburg-Western Pomerania.
50Hertz operates the electricity transmission system in the north and east of Germany, which it expands as needed for the energy transition. The 50Hertz control area covers the Länder of Brandenburg, Mecklenburg-Western Pomerania, Saxony, Saxony-Anhalt and Thuringia, as well as the city states of Berlin and Hamburg. Within these regions, 50Hertz and its 1,100 employees ensure that 18 million people are supplied with electricity around the clock. 50Hertz is a forerunner in the field of secure integration of renewable energy: in our grid area, more than half of the electricity consumed is already generated from renewable sources, and the trend is rising. The shareholders of 50Hertz are the Belgian transmission system operator Elia (80 per cent) and the KfW bank group with 20 per cent. As a European transmission system operator, 50Hertz is part of the Elia Group and a member of the European association ENTSO-E.
About Neubrandenburger Stadtwerke
Neubrandenburger Stadtwerke and its subsidiaries supply about 27,500 households with district heating. This is about 80 per cent in the city. The multi-utility company moreover takes care of electricity, potable water, wastewater, gas supply, urban bus traffic, television, internet, telephony, IT and telecommunication services. neu.sw also runs an indoor swimming pool and a crematorium. The group employs more than 550 people.
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