Murau power plant

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Murau run-of-river power plant
Mur power plant Murau7.jpg
location
Murau run-of-river power plant (Styria)
Murau run-of-river power plant
Coordinates 47 ° 6 '32 "  N , 14 ° 11' 0"  E Coordinates: 47 ° 6 '32 "  N , 14 ° 11' 0"  E
place Murau
Waters Mur
Kilometers of water km 377.13
Height upstream 794  m above sea level A.
power plant
operator Murauer Stadtwerke
Start of planning 1906
Start of operation 1908
technology
Bottleneck performance 4.5 megawatts
Turbines
Others

The Murau power plant is a run-of- river power plant on the Mur in Murau in Styria . It is operated by Murauer Stadtwerke .

location

The power plant is located on the upper Mur , on the eastern edge of the city of Murau (river kilometer 377.1). It belongs to the cadastral communities Murau and Egidi , the border runs across the Mur between the weir and the power house. Directly above the power plant is the Mur bridge on the L502  Sankt Lamberecht Strasse .

The storage space is only about 800 meters upstream to the train station bridge (Murau) , at the foot of the Murauer Schlossberg .

history

Originally, the Köglhof cataract was located in Murau , a 10 meter high rapids that made the Mur impassable from here upwards.

In 1906 the Murau town council decided to build a power plant, especially to supply the Murau brewery with electricity. In 1908, the factory was started up with an output of 300 kW from three Francis turbines . This makes the power plant one of the first on the Mur.

In 1954 a new concrete weir was built and an additional Francis shaft turbine was installed, increasing the output to 800 kW. Murauer Stadtwerke has been operating as a GmbH since 1972 .

Until the 1970s, the network in Murau was operated as an island , when it was one of the last regions in Austria to be connected to the network (now APG ). The 110 kV line from the Teufenbach substation to the Bodendorf power plant was only built in the early 1980s, and is still the only high-level supply line to the Murau area today. For this reason, during the further expansion, care was taken to have a system that was basically capable of island operation, both in terms of the machine equipment and the construction of a ripple control system .

In 1984 the system was fundamentally rebuilt again, a new power house was built, the Francis turbines from 1907 were replaced by a 2000 kW Kaplan S turbine , and the weir was equipped with a hydraulic dam. Including the turbine from 1954, the plant now had an output of 2.3 MW. In 1990 the substation was renewed and converted from the old 5 kV to a 10 kV network. In 2000 a further 2000 kW Kaplan turbine was installed. A quota of 80 percent in-house production in the municipal utility network was achieved.

In 2004 a fish pass was created . It was implemented - even before the National Water  Management Plan (NGP), which implements the EU Water Framework Directive  (WFD) - as part of an EU-funded LIFE + project belonging to the Natura 2000 program . This action program Inner-Alpine river basin management Obere Mur / “Mur [er] leben” combines the hydraulic engineering and nature conservation efforts of the EU, the Ministry of Life (BMLFUW), the state and the defense operators. Because of the difficult situation, € 300,000 was built.

As early as 2010, the Murau municipal utilities achieved an energy surplus of 40% of their own requirements with additional power plants in their supply area, and by 2015 the network of the entire Murau district became largely energy self- sufficient as part of the Energy Vision project - albeit with the disadvantage that it could not be further expanded for the time being to be and with increasing problems in feeding into the national grid. This pilot project has been awarded several environmental prizes and is also promoted within the framework of the leader region Holzwelt Murau .

investment

The weir system of the run-of- river power plant has a field with a clear width of 22 m, the damper can be hydraulically lowered completely for flood situations, as is common on the upper Mur, and enable free flow. The storage space is at 794  m above sea level. A. , the underwater at about 785  m above sea level. A.

The power house and the operating facilities are on the left bank , about 70 m below the weir line with the inlet channel. The plant has two Kaplan S turbines (built in 1984, 2000) with 2,000 kW each and a Francis shaft turbine (built in 1954) with 500 kW. The energy is distributed to the city of Murau and the surrounding area via a 10 kV ring cable network.

Underwater of the power house and the old bed of the Mur are still separated 200 m downstream. In normal operation, the bed lies dry directly below the weir, so that parts of the Köglhof cataract are visible again. The fish pass is on the left (north) bank embankment. It overcomes a terrain height of 9 m and has a total length of 230 m. A total of 47 steps were necessary for this. About half of these could be created in the lower area as near-natural pool passes, the upper part had to be implemented technically in the form of slit passes due to the cramped conditions. As a special feature, there are also three pre-basins, in which the endowment (amount of water) can be precisely set manually with elevating partition walls in order to ensure optimum patency for spring spawners (such as grayling, huchen, rainbow trout) and autumn spawners (such as brown trout) as well as young fish Ensure season.

Nature and leisure

The upper Mur originally mullet region , with the mullet as main species and trout , Koppe or Ukrainian lamprey as by fish, but is used by the rainbow trout dominates. In addition to the general restoration of the river continuum, with which a more natural population is to be established, the focus here is particularly on the endangered huchen , a large salmon fish from the Danube region that is true to its location. This had been preserved in an isolated population for the past 100 years in the approximately 90-kilometer stretch of the river to the power stations in the Mur breakthrough valley from Bruck. With the fish pass, this fish can now colonize the Mur above Murau. With the coming renewal of the power plants Kraftwerk St. Georgen / Bodendorf a good 8 kilometers above, the fish could then perhaps penetrate into the Lungau . Under certain circumstances, this is even a new development of a habitat, it is not entirely clear from historical sources whether the Huchen was able to overcome the Murau Köglhof cataract earlier.

The complex belongs to the full extent for Europe reserve upper and middle sections of the Mur ( FFH , AT2236000 / Nr. 5).

The Murradweg passes the power station on the city side, on the other bank the Salzsteigweg (Austrian long-distance hiking trail 09), here together with the Styrian circular hiking trail , comes from Murau up to the Frauenalpe.

Web links

Commons : Kraftwerk Murau  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b GIS-Steiermark, topic waters & water information (accessed November 18, 2016).
  2. ↑ R. Suppan: Our Mur. Verlag für Collectors, Graz, 1984, p. 252 ff
  3. ↑ a b Bernhard Schmall: The Huchen in the state of Salzburg then and now. In: Österreichs Fischerei , year 65/2012, Kapitel Mur , p. 265 ff, full article, p. 259–277, PDF on ZOBODAT - with two historical photos, Fig. 6 (from Suppan, 1984).
  4. ↑ a b The rock bank is the same Murau lime as the Schloßberg , the St. Egidi quarry and the surrounding mountain feet. Compare Andreas Thurner: Geology of the Frauenalpe near Murau. In: Jahrbuch der Geologische Bundesanstalt 86 (1936), especially 7th main profile Mur at the electricity works - Eckardalpe ... , p. 322 ff, also 5th main profile, p. 320 ff, whole article p. 303–336, PDF on ZOBODAT there esp. p. 20 f, ill. profiles on last page.
  5. ↑ a b c d e f g h i j Stadtwerke Murau: Company: Company Chronicle. on stadtwerke-murau.at (called November 21, 2016).
  6. ↑ In 1908 the Steiermärkische Elektrizitäts-Gesellschaft (STEG) also put the Lebring and Peggau-Deutschfeistritz works into operation; Only the Bruck (1903) and Judenburg (1904) power plants are older , both of which are also owned by municipal utilities. Compare Bartel Granigg: The use of hydropower in Austria - and its geographical basis. Springer-Verlag, Vienna 1925, ISBN 978-3-662-28869-6 , Chapter VI e) Large power plants in Styria , esp. No. 101 and 102, p. 53 (chapter from p. 51, limited preview in Google Book search).
  7. ↑ a b c d Smart Microgrid Murau. Regional, fail-safe electricity supply in the Murau region. In: Federal Ministry for Transport, Innovation and Technology: Intelligent Energy Systems of the Future. Smart grids pioneers in Austria. Strategies - projects - pioneer regions. Brochure, Vienna 2010, pp. 22–23 ( pdf , on suchtwirtschaften.at; there p. 24 f).
  8. ↑ Österreichische Zeitschrift für Elektrizitätswirtschaft , Volume 34 (1981), p. 52 ( limited preview in the Google book search).
  9. ↑ a b Austrian Power Grid AG (Ed.): Network Development Plan 2015 , Section Projects, 4.4.15 UW Zeltweg: 220/110 kV grid support EN Styria. P. 65 f ( full report, pdf , on apg.at, accessed November 24, 2016).
  10. ↑ Wasserkraft Murau: Flowing energy. holzweltmurau.at, accessed November 22, 2016.
  11. ↑ Murauer Stadtwerke build a new power plant. From now on, the Murau people are dependent on energy. In: Extra July 2009, p. 45 ( article, pdf ( memento of the original from November 24, 2016 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove them Note. , On energievision.at). @1@ 2Template: Webachiv / IABot / www.energievision.at
  12. ↑ a b c d e LIFE-NATUR mur (er) leben: Fischwanderhilfe Murau. Folder (pdf, on murerleben.at, accessed November 20, 2016) - with an overview plan of the power plant.
  13. ↑ "Murerleben" - the LIFE + Nature project on the upper Mur (murerleben.at) . Office of the Styrian Provincial Government, FA 19B / 13C (project sponsor, 2004).
  14. ↑ LIFE + Natur Project Inner Alpine River Management Obere Mur. Federal Ministry of Agriculture, Forestry, Environment and Water Management: bmlfuw.gv.at »Water in Austria» Rivers and Lakes , accessed November 22, 2016.
  15. ↑ LIFE Nature Project “Inner Alpine River Management Obere Mur”. wasserwirtschaft.steiermark.at
  16. ↑ Energievision Murau (energievision.at).
  17. ↑ "In the event of a disaster, Murau would disconnect from the network". Interview with Kurt Woitischek, head of Murauer Stadtwerke, and Holzwelt manager Harald Kraxner, Sarah Ruckhofer in Kleine Zeitung online, January 24, 2016.
  18. ↑ Energievision - Special highlights: ( Memento of the original from March 4, 2016 in the Internet Archive ) Info: The @1@ 2Template: Webachiv / IABot / www.energievision.at archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Awards from Energievison Murau. Energievision.at (accessed November 24, 2016).
  19. ↑ a b Wood World Murau Energy Camp. holzweltmurau.at.
  20. ↑ a b c Gerald Zauner, Clemens Ratschen, Jürgen Eberstaller, Peter Pinka: Vertical-Slot-Fischpass with staggered drain: One possibility for optimizing technical fish passages. In: Österreichs Fischerei , volume 58/2005, pp. 162–169 ( pdf , on zobodat.at).
  21. ↑ Bernhard Mueller: Checking the functionality of the fish pass at the Murau power plant. Master thesis, University of Natural Resources and Life Sciences, Vienna 2007 ( abstract , boku.ac.at).
  22. ↑ Huchen (Hucho hucho). murerleben.at >> NATURA 2000 and LIFE + (accessed November 23, 2016).