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Grid reinforcement of 380-kV high-voltage transmission line Röhrsdorf-Weida-Remptendorf


The energy transition and the switch to more renewable energy lead to new challenges for the electrical grid. The electricity produced in the north and east of Germany has to be transported to the consumption centres farther south. In order to do this, the capacity of the high-voltage transmission grid has to be increased. As a result of the construction of a new, more powerful 380-kV overhead line between Röhrsdorf in Saxony and Weida and Remptendorf in Thuringia, the transfer capacity in the south of the 50Hertz control area should increase and the security of supply to companies and households should be ensured in these regions.

The existing 100 km-long 380-kV overhead line is currently operated at 2500 ampere per electrical circuit and should be upgraded to a current-carrying capacity of 3600 ampere in the future. This increases the transfer capacity by about 40 per cent. After the new line has been put into operation, the existing 380-kV line will be disassembled. In addition to the construction of the new line, the substations in Röhrsdorf, Weida and Remptendorf have to be prepared for the new overhead line.

The project was legally approved in the Federal Requirement Plan Act and designated as project no. 14. The authority that is competent for its approval is the Federal Network Agency located in Bonn.


The current 380-kV overhead line between the substations of Röhrsdorf and Remptendorf The current 380-kV overhead line between the substations of Röhrsdorf and Remptendorf

Computer simulation shows alternative corridors

At two project conferences in Schleiz and Altenburg, 50Hertz explained its application for federal sector planning with the aid of a computer simulation. To this end, three short films were made, depicting the possible alternative corridors in the landscape. The films are based on a three-dimensional terrain model with the existing line and the 1000 metre wide corridors.

Two films showcase the approved eastern section between Röhrsdorf and Weida and a possible alternative to the south. The third film shows the studied corridors in the approved section Weida – Remptendorf. The current route is coloured orange in the films. Other existing overhead lines that run parallel to the current line in certain places are shown in green.

These and other films, created in August 2016 for information fairs, can be seen on 50Hertz’s YouTube channel.