Grossraming Run-of-River Power Plant

VERBUND’s Grossraming power plant is a run-of-river power plant on the Enns, situated in the municipality of Reichraming in Upper Austria.

60,292 households

supplies the Großraming power plant

204,292 fewer
tonnes of CO2*

Fish bypass is currently being evaluated.

Environmentally certified in accordance with ISO14001

*Source: ENTSO-E Production 2017

The Großraming power plant was built in several stages between 1945 and 1951. Until 2000, the power plants at Schönau, Weyer and Losenstein were also controlled from Großraming – the central control room is now in Steyr. The power plant’s two sets of machinery were completely renewed between 2001 and 2003. Two Kaplan turbines with a directly coupled three-phase synchronous generator generate an annual average of approx. 270 GWh of electricity.

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Owner	Ennskraftwerke AG
Operator	Ennskraftwerke AG
Commissioning	1950
Type	Run-of-river power plant
Country	Austria
Region	Upper Austria
Waters	Enns
Output	72 MW
Annual output	270,700 MWh
Turbine	Kaplan
Connectivity	No fish bypass

Ecology & environmental protection

A fish bypass for the Großraming site is currently being evaluated. A feasibility study of ecological measures (German only) on the Enns was carried out in 2017 by the University of Natural Resources and Life Sciences Vienna (commissioned by: Office of the Provincial Government of Upper Austria, Office of the Provincial Government of Styria, Ennskraftwerke AG and VERBUND Hydro Power GmbH).

Responsible treatment of the environment

Turbines and generators: Two sets of machinery from the years 2002 and 2003, each comprising a vertically arranged Kaplan turbine with a nominal output of 35.55 MW and a directly coupled three-phase synchronous generator with a nominal output of 38 MVA. A Francis turbine with an expansion output of 515 kW and coupled with a 700 kVA generator serves as an in-house machine.

Transformers: Each of the two main transformers has an output of 31,500 kVA and a transformation ratio of 6.3/115 kV.

Weir system: Each weir is equipped with two underguards (ground outlets) and a weir gate. In the stilling basin, six 4 metre-high, armoured interfering bodies for energy destruction are installed in each half of the weir. A water flow rate of 3,500 m³/sec can be discharged through the weir system by releasing all the closure openings, while maintaining the final level.