Aschach power plant

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Aschach power plant
The power plant from downstream
The power plant from downstream
location
Aschach power plant (Upper Austria)
Aschach power plant
Coordinates 48 ° 23 '6 "  N , 14 ° 1' 21"  E Coordinates: 48 ° 23 '6 "  N , 14 ° 1' 21"  E
country AustriaAustria Austria
OberosterreichUpper Austria Upper Austria
place Aschach on the Danube
Waters Danube
Kilometers of water km 2162.67
Height upstream 280  m above sea level A.
power plant
owner VERBUND Hydro Power AG
operator VERBUND Hydro Power AG
construction time 1959-1964
technology
Bottleneck performance 324 megawatts
Average
height of fall 		15.3 m
Expansion flow 2,480 m³ / s
Standard work capacity 1,662 million kWh / year
Turbines 4 Kaplan turbines
Generators 4 synchronous generators
Others
was standing April 2010

The Aschach power plant is a run-of-river power plant on the Austrian Danube in the state of Upper Austria . It lies at the end of the Danube breakthrough between Sauwald and Mühlviertel near Aschach an der Donau .

history

The Austrian Danube power stations AG began in 1959 with the construction of the dam . After five years of construction, the second Austrian hydropower plant on the Danube was opened in 1964 . The barrage has been operated by VERBUND Hydro Power AG since 1999 .

and display information about the image
The power plant from upstream

technical description

Dam

The 398 m long dam dams the Danube at river kilometer 2,162.67 over a length of 41 km up to a height of 15.3 m and thus forms the highest drop of all Austrian Danube power plants . The content of the storage space is approx. 114 million m³, the storage target is at an altitude of 280  m above sea level. A. The weir consists of five weir fields with a width of 24 m each and is located at the left end of the dam. At the right end of the dam are the two locks , each with a usable length of 230 m and a usable width of 24 m. A lock process takes 15 minutes.

Machine house

The machine house is located between the weir system and locks. Four sets of machines supply electricity to the public grid . Each of these sets consists of a Kaplan turbine with a vertical shaft and an alternator . The rated output of the turbines is 81,000 kW. The diameter of an impeller is 8.6 m.

The four three-phase generators have a nominal voltage of 10.5  kV and a nominal output of 98 MVA each  . After the step-up to 220 kV, the energy is fed via cable to the 220-kV outdoor switchgear, which feeds two 220-kV line systems. Overall, the power plant has a bottleneck capacity of 324 MW.

With an expanded flow rate of 2,480 m³ / s, the standard energy capacity is 1,662 million kWh per year  .

Two smaller sets of machines generate the electricity for the power plant's own use. They each consist of a Kaplan tube turbine with a nominal output of 718 kW and a three-phase generator with a nominal output of 900 kVA.

Renewal 2007–2010

After more than 45 years of unrestricted operation of the machine sets, an efficiency improvement program took place between 2007 and 2010. For this purpose, both turbines and generators were renewed according to the state of the art. The nominal output of a turbine is now 81,000 kW (previously 66,500 or 66,900 kW). The diameter of the running wheels has been increased from 8.4 m to 8.6 m.

The three-phase generators experience an increase in output from 85,000 to 98,000 kVA. The overall efficiency of the machine sets could be increased by approx. 2% through these measures.

After completion, the power plant will have a bottleneck capacity of 324 MW. The expansion flow was increased from 2,040 m³ / s to 2,480 m³ / s, and the standard energy capacity from 1,617 to 1,662 million kWh per year.

The replacement of the machine sets was completed in April 2010.

Disposal of floating debris

The turbine inlet rakes prevent floating debris from entering the turbines. This produces an average of 12,000 m³ of floating debris per year. The floating debris is recovered, shredded into wood chips in a shredder, freed from metal and plastic parts and then stored in eight silos with a total capacity of around 2,500 m³.

The wood chips are burned in two biomass boilers and the resulting heat is fed into the district heating network, thus supplying the communities of Aschach and Hartkirchen .

Use of waste heat

A large heat pump feeds heat from waste heat from the machines into the district heating supply for the communities of Aschach and Hartkirchen.

ecology

Four biotopes have been created in the storage space, offering the diverse flora and fauna a new habitat.

See also

literature

  • Gerhard A. Stadler, Manfred Wehdorn , Monika Keplinger, Valentin E. Wille: Architektur im Verbund (= series of research in Verbund 100). Springer Verlag, Vienna et al. 2007, ISBN 978-3-211-75795-6 .

Web links

Commons : Kraftwerk Aschach  - Collection of images, videos and audio files

Individual evidence

  1. ^ Message in ORF-Online about the completion of the renovation measures