Teigitsch power plant group
The power plant group Teigitsch (short Teigitschgruppe ) is a series of hydroelectric power plants of VERBUND Hydro Power AG in the Austrian state of Styria . It consists of three reservoirs and four power plants on the western Styrian river Teigitsch in the vicinity of the district capital Voitsberg . Expansion began in 1921 with the Arnstein storage power plant and was completed in 1965 with the St. Martin power plant cavern .
history
The construction of the hydropower plants on the Teigitsch was decided in 1921 by the newly founded STEWEAG . The aim was to tame the river with an annual runoff of 130 million cubic meters, which often caused great damage during floods, and at the same time made it usable. The Arnstein storage power plant , by far the largest in Styria at the time, was officially opened on March 28, 1925 in the presence of Federal President Michael Hainisch . With a machine output of 20 megawatts, the entire Central Styria including the provincial capital Graz could be supplied with electricity. The mayor of Graz, Vinzenz Muchitsch , had the festive lighting of the town hall , the country house and the clock tower switched on when the system was commissioned .
In 1926, the Teigitschmühle run-of-river power plant downriver from Arnstein, and in 1931 the storage power plant on the Packer Bach, a right feeder to the Teigitsch, went into operation. In order to be able to operate the Arnstein power station at maximum capacity over a longer period of time, it was decided in 1947 to build the Hirzmannsperre . The third and largest reservoir of the group, completed in 1950, then served only as storage space for a decade and a half; its water was fed to the Langmann reservoir below without intermediate use. In 1965, the expansion of the KW Group was completed with the completion of the St. Martin storage and cavern power station .
Today the power plants mainly serve to cover peak electricity demand .
Technical specifications
Power plants
| pack | St. Martin | Arnstein | Dough grinder | |
|---|---|---|---|---|
| Power plant type | Daily memory | Annual memory | Annual memory | Run-of-river power plant |
| Installation | 1931 | 1965 | 1925 | 1926 |
| Catchment area | 63 km² | 162 km² | 176 km² | 170 km² |
| Bottleneck performance | 800 kW | 9,800 kW | 30,000 kW | 1,200 kW |
| Generation in the standard year | 1.8 GWh | 15.5 GWh | 60.0 GWh | 2.0 GWh |
| Raw head | 28.6 m | 77.6 m | 246.8 m | 11.6 m |
| Turbines | ||||
| number | 1 | 1 | 3 | 1 |
| design type | Francis turbine | Kaplan turbine | Francis turbine | Francis twin turbine |
| rated capacity | 745 kW | 11,000 kW | 11,000 kW | 1,435 kW |
| Nominal flow | 3.3 m³ / s | 16.5 m³ / s | 5.5 m³ / s | 15.0 m³ / s |
| Rated speed | 600 rpm | 610 rpm | 750 rpm | 250 rpm |
| Impeller diameter | 0.805 m | 1.49 m | 1.20 m | 1.2 or 1.4 m |
| Generators | ||||
| number | 1 | 1 | 3 | 1 |
| rated capacity | 900 kVA | 12,500 kVA | 13,000 kVA | 1,900 kVA |
| nominal voltage | 5.5 kV | 6.3 kV | 5.5 kV | 5.5 kV |
In front of the confluence with the Hirzmann reservoir, there has also been the Edelschrott power plant since 1910, which is not operated by Verbund AG but by Stadtwerke Köflach .
Storage
| pack | St. Martin | Arnstein | Dough grinder | |
|---|---|---|---|---|
| Storage / lock | pack | Hierzmann | Langmann | - |
| Storage type | Daily memory | Annual memory | Daily memory | - |
| Congestion destination | 867.7 m | 708.0 m | 630.5 m | - |
| Lowering target | 849.0 m | 675.0 m | 621.0 m | - |
| Usable content | 5.4 million m³ | 7.1 million m³ | 0.32 million m³ | - |
| Lock type | Gravity dam | Vaulted wall | Gravity dam | - |
| Wall height | 33.2 m | 58.6 m | 26.0 m | - |
| Crown length | 183 m | 172 m | 85 m | - |
| Crown width | 4.0 m | 3.0 m | 3.0 m | - |
| Maximum base width | 24.0 m | 17.0 m | 15.0 m | - |
| Concrete cubature | 49,000 m³ | 43,000 m³ | 12,000 m³ | - |
Step-by-step plan
Web links
Individual evidence
- ↑ a b c Ernst Lasnik : The hydropower system in the Teigitschtal. In: St. Martin am Wöllmißberg. Sankt Martin am Wöllmißberg 2007, pp. 479-486.
- ↑ a b Verbund AG (ed.): Electricity from Enns, Mur and Teigitsch. The hydropower plants in Styria. Vienna 2013, pp. 14–18.
Coordinates: 47 ° 1 ′ 6.4 " N , 15 ° 9 ′ 34.7" E