VERBUND’s Fisching power plant is a run-of-river power plant on River Mur situated in the municipality of Fisching in Styria.
The Fisching power plant is also popularly known as the “invisible” power plant because it blends almost imperceptibly into the landscape along the banks of the Mur. What represents a challenge to visitors from outside the area, who simply can’t find the hidden building of the Fisching power plant, delights environmentalists and nature lovers all the more. Today, the power plant generates electricity entirely from hydropower for approximately 14,900 households in the region.
Owner: VERBUND Hydro Power GmbH
Operator: VERBUND Hydro Power GmbH
Commissioning: 1994
Type: Run-of-river power plant
Country: Austria
Region: Styria
Waters: Mur
Output: 22 MW
Annual output: 66,440 MWh
Turbine: Kaplan
Connectivity: Fish bypass
Turbines and generators: Two Kaplan spiral turbines are housed in the powerhouse. Machine 2 has an impeller with a diameter of 3.5 metres and has a nominal output of 17,700 kWh at an expansion flow rate of 86 m³/sec. The directly coupled three-phase synchronous generator has a nominal output of 22,000 kVA. Machine 3 is equipped with a 1.4-metre impeller and has a nominal output of 2,950 kWh at a flow rate of 14 m³/sec., which subsequently flows through the 3,500 kVA generator. Unlike most other power plants on the Mur, the Fisching power plant has only a control room instead of a control station. Because of this, it is only possible to control and monitor the Fisching power plant; interventions in other plants on the Mur are not possible from here.
Transformers: A 25,000 kVA three-phase machine transformer connects the 10.5 kV and the 110 kV levels. The plant additionally has a transformer to cover its own requirements.
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During construction of the diversion-type power plant at Fisching from 1991 to 1994, a fish ladder was built alongside the weir. The approx. 350 metre-long fish ladder has the shape and character of an alpine stream and was adapted to the main fish species, the grayling. The average gradient of the channel is 3.4% over a total height difference of 11.5 metres.
