The Ostbayernring power line from Upper Franconia to Upper Palatinate in the German state of Bavaria regularly reaches its limits due to the increasing feed-in of renewable energy. The transmission capacity of the Ostbayerring must therefore be significantly increased in order to guarantee future security of supply and grid stability. For this purpose, a highly efficient replacement construction is planned along the existing route. In the context of this Ostbayernring upgrade, also the Mechlenreuth substation in Münchberg is being renewed and expanded since spring 2018.
The substation is operated by TSCNET shareholder TenneT, the Dutch-German transmission system operator (TSO). It is a central hub for regional and supra-regional energy supply, as here the existing and in future the new Ostbayerring is connected to the subordinate 110 kV level of the distribution grid. The modernisation of the substation is making great progress: On 11 October 2018, a heavy-load rail transport system delivers a new direct coupling transformer with a transport weight of 254t to Mechlenreuth.
The 300MVA transformer is scheduled to go into operation in April 2019. Like the Ostbayernring itself, the substation cannot be switched off completely for a longer period of time in order to guarantee constant power supply. All the particular components will therefore be individually dismantled, newly erected and put back into operation in several construction phases and during ongoing operation. The modification of the entire Mechlenreuth plant should be completed in 2023.
TenneT expects the delivery of a direct coupling transformer to the Ostbayernring substation in Mechlenreuth (picture of a previous transformer transport: TenneT)
> See TenneT press release, in German (html)