Bentwisch converter station
The Bentwisch converter station is an HVDC station commissioned in 1996 near Bentwisch in the Mecklenburg district of Rostock . It is the southern end point of the HVDC Kontek , which couples the power grid of Germany and the East Danish islands in terms of their frequencies. The Kontek has a transmission capacity of 600 MW at a voltage of 400 kV and is designed as an underground or submarine cable over its entire length.
The connection of the converter station took Bentwisch to the Central European electricity grid by 2002 through a single 380 kV three-phase circuit to the substation Güstrow, which is designed as a transmission line and the second to last mast together with the 380 kV circuit from Güstrow to Rostock power plant on the the same mast was mounted.
In 2002 the Bentwisch converter station was expanded to include a 380 kV / 110 kV substation. For this purpose, a single-circuit 110-kV line was built to the 220-kV / 110-kV substation Bentwisch, just a few hundred meters north, and the 380-kV line from Güstrow to Rostock power plant was looped up at the Bentwisch converter station, so that it is now with two 380 kV circuits are connected to the Güstrow substation.
Since 2014, the Bentwisch converter station has been feeding in the energy generated in the Baltic 2 offshore wind farm , which is supplied in the form of three-phase current with a voltage of 150 kV.
In the course of the construction of the Danish offshore wind farm Kriegers Flak , it was decided to implement a line connection via this to the Danish island of Zealand . Since the power grids of Zealand and Germany are not synchronized with each other, the interconnection of an HVDC is necessary, whereby this can be implemented either as a long-distance transmission or as a short coupling. Since there is not enough space on the existing offshore transformer stations for an HVDC converter, it was decided to implement one in the form of a close coupling on the area of the Bentwisch converter station, although this solution is compared to remote HVDC transmission from the offshore wind farm to Bentwisch has the disadvantage that it is associated with higher losses, since converters have their own requirements and transmission losses, which cause a higher loss with a short transmission distance between the stations than with a direct connection. The project with an investment volume of around 250 million euros celebrated the groundbreaking in May 2017 and the topping-out ceremony in April 2018. Half of the costs are borne by the EU and a quarter each by the two network operators involved, 50Hertz and Energinet.dk .
In contrast to the converter of the HVDC Kontek, which uses thyristors , the converter of the HVDC short coupling, which is designed as a bipolar system with a voltage of 140 kV in the DC link and has a transmission capacity of 410 MW, uses IGBTs.
Web links
Individual evidence
- ^ Kriegers Flak and Baltic 2: German-Danish electricity project closes the gap
- ↑ 50 Hertz: Groundbreaking ceremony for double converters in Bentwisch < , press release of May 9, 2017
- ^ Electricity for Denmark and Germany , daily port report on April 19, 2018
- ↑ Closing the gap in the German-Danish electricity project , newspaper for local government on July 5, 2018
Coordinates: 54 ° 5 '59.9 " N , 12 ° 12' 50.8" E