The transmission capacity of the extra-high voltage grid in the southwest of Baden-Württemberg, Germany, is reaching its limits considering the requirements for an efficient and future-proof energy system. To increase capacity and ensure regional security of supply as well as reliable transmission in the future, Baden-Württemberg’s transmission system operator (TSO), TSCNET shareholder TransnetBW, is replacing the 220kV overhead line between Karlsruhe-Daxlanden and Eichstetten am Kaiserstuhl (near Freiburg) with a 380kV line. This line upgrade in the Upper Rhine Plain is part of the National Network Development Plan for Electricity and comprises the construction of around 120km of new lines and five substations.
The entire project is divided into four sections and the planning approval procedure for the section B1 between Sasbach and Offenburg-Weier in the Ortenau district was opened on 9 May. TransnetBW had submitted the relevant documents at the end of last year to the Freiburg Regional Council. After official review and a revision by the TSO, the authority initiated the approval procedure. Next steps include the consultation process with a month-long disclosure of the documents to the municipalities concerned and the involvement of public interest parties.