Bodendorf-Mur Run-of-River Power Plant

VERBUND’s Bodendorf-Mur power plant is a run-of-river power plant situated on River Mur in the municipal area of St. Georgen ob Murau in Styria.

*Source: ENTSO-E Production 2017

It was built between 1979 and 1982. The low pressure stage on the Mur is housed together with the medium pressure stage on the Paalbach, Turrachbach and Minibach in a single power house in Bodendorf. In 2007, the control room was redesigned and the control systems and machine automation. On average, a five-blade Kaplan spiral turbine generates about 34 GWh of electricity annually.
Turbines and generators: The five-blade Kaplan spiral turbine with 15 impeller blades and 20 guide blades and an impeller diameter of 2.7 metres has a nominal output of 7,000 kW at a speed of 214.3 rpm. The turbine is directly coupled to an 8,500 kVA three-phase synchronous generator. The waste heat of the generator can be used in winter to heat the powerhouse.

Transformers: The energy obtained is raised to 30 kV by an 8,500 kVA machine transformer and transmitted via 30 kV lines to Teufenbach, St. Georgen and Predlitz. For the in-house needs of the entire plant (Mur and Paal), two 400 kVA transformers are available to convert between the 35 kV and 0.4 kV levels.

Weir system: Welded steel pressure segments with weir flaps close the two 11.5 metre-wide weir fields and have a closing height of 8.5 metres. The moving parts are controlled oil-hydraulically by two pull cylinders for raising the segments and a central push cylinder for lowering the flaps.