On the site of the former Philippsburg nuclear power plant, which was shut down completely on 31 December 2019, a new DC substation for the German supra-regional “power highway” ULTRANET is being constructed. The Philippsburg substation in the German state of Baden-Württemberg represents the southern end point of ULTRANET, where the high-voltage direct current (HVDC) line will be connected to the regional 380kV AC grid. The new substation is thus to become one of the most important energy hubs in Germany’s future energy landscape. It is being built on behalf of TSCNET shareholder TransnetBW, the transmission system operator (TSO) from Baden-Württemberg. In its entirety, ULTRANET is a joint project of TransnetBW and further German TSCNET shareholder Amprion. It will transmit wind energy generated in the northwest of Germany to the industrially highly developed southwest. On the other hand, the Philippsburg substation will enable the conversion of AC to DC, e.g. to transport excess photovoltaic electricity from the south to the north.
In March 2020, the construction of the ULTRANET substation was approved by the competent authority and in May, the demolition of the two cooling towers of the former power plant created the necessary construction space of around 100,000m². Now, the ceremonial laying of the foundation stone took place in Phillipsburg in the presence of high-ranking representatives from politics, business, and society – and in strict compliance with the Corona regulations. Dr. Werner Götz, Chairman of the TransnetBW Executive Board, commented: “It was nevertheless very important to us not to let this important day pass without expressing our thanks to politicians, partners, and the project team.”
Andreas Feicht, State Secretary at the German Federal Ministry for Economic Affairs and Energy, recognised the progress of the European Project of Common Interest (PCI): “The converter in Philippsburg illustrates that the grid expansion is progressing in large steps.” Franz Untersteller, Minister of the Environment, Climate Protection, and the Energy Sector of Baden-Württemberg, emphasised the specific nature of the location and its symbolic value: “There are few places where the energy transition can be visualised in such a condensed form as here in Philippsburg. After the two cooling towers were detonated in May of this year, the old world made way for the new.”