The VERBUND power plant Annabrücke is a run-of-river power plant on the Drava and located in the municipality of Gallizien in Carinthia. Europe's highest fish pass is situated there.
Owner: VERBUND Hydro Power GmbH
Operator: VERBUND Hydro Power GmbH
Commissioning: 1981
Type: Run-of-river power plant
Country: Austria
Region: Carinthia
Waters: Drava
Output: 90 MW
Annual output: 386,497 MWh
Turbine: Kaplan
Connectivity: Fish bypass
Turbines and generators: The two machine sets have vertical Kaplan turbines which achieve a nominal output of 90 MW at a nominal flow rate of 205 m³/sec. and a head of 24.3 metres. The five-bladed impellers have a diameter of 5.1 metres and are directly coupled with the generators, with machine 1 driving a 60 MVA single-phase traction current generator (16 2/3 Hz) and machine 2 driving a 58 MVA three-phase synchronous generator (50 Hz).
Transformers: A 60 MVA block transformer with oil cooling is available for raising the traction current from 10 kV to 121 kV.
Weir system: Each of the three weir fields of the plant has a width of 18 metres and a barrier height of 15 metres. They are closed with oil-hydraulically powered, welded pressure segment barriers with weir gates.
The Annabrücke power plant was built between 1976 and 1981 and co-financed by KELAG.
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Austria’s highest fish pass has been built at the Annabrücke power plant. The fish overcome a 26 metre height difference in this slot pass system. The project is supported by the Ministry of Agriculture, Regions and Tourism and the province of Carinthia.
