As a result of the energy transition, the four German transmission system operators (TSOs) all are heavily involved in compensation measures to maintain long-term security of electricity supply in light of the decommissioning of nuclear and other large-scale power plants. Since 2015, TSCNET shareholder TenneT, the Dutch-German TSO, has been building the completely new substation Bergrheinfeld/West in northern Bavaria, near the already shutdown Grafenrheinfeld nuclear plant.
Bergrheinfeld/West is one of the projects TenneT considers essential for Germany’s energy future. Hence, the TSO invests about €100m in the new facility which will be one of the most modern of its kind. Already on site are a rotating phase shifter with generator transformer, three compensating coils and the first of two direct coupling transformers (DCTs) to connect TenneT’s supra-regional 380kV transmission grid to the regional 110kV grid. With a transmission capacity of 300MVA each, the transformers can theoretically provide electricity for around one million households.
Today, the second direct coupling transformer was delivered to Bergrheinfeld/West. It was built by GE Grid Solutions in Mönchengladbach and initially transported by ship across the rivers Rhine and Main to the port of Garstadt, where it was reloaded onto a 67-meter heavy-duty road transport unit. The transport weight of the transformer is about 260t, and the subsequent operating weight of both units will be 370t each. Preparations for the initial set up of the transformers are expected to be finished in July 2018, followed by the commissioning of the substation’s 380kV system section. The completion of the entire Bergrheinfeld/West substation is scheduled for 2019.
> See TenneT press release, in German (html)
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