Wildegg-Brugg power plant

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Wildegg-Brugg power plant
View of the headquarters from the southwest
View of the headquarters from the southwest
location
Wildegg-Brugg power plant (Canton of Aargau)
Wildegg-Brugg power plant
Coordinates 655139  /  257818
country SwitzerlandSwitzerland Switzerland
Kanton AargauKanton Aargau Aargau
place Villnachern
Waters Aare
Height upstream 347.9  m above sea level M.
power plant
owner Axpo AG
Start of planning 1917
construction time 1949-1953
Start of operation 1953
1997 after renovation
technology
Bottleneck performance 49.7 megawatts
Average
height of fall 		14 m
Expansion flow 410 m³ / s
Standard work capacity 289.5 million kWh / year
Turbines 2 × Kaplan turbines
Others
was standing 2020

The Wildegg-Brugg is a low-pressure - hydropower plant on the river Aare . The diversion power plant is located in the canton of Aargau in Switzerland . Its concession area extends from Möriken-Wildegg to Brugg . The plant was commissioned in 1953 and is the most powerful power plant on the Aare.

history

The concession for the power plant was granted in 1917 to a consortium consisting of the construction company Locher & Cie , the cement factory Zurlinden and Motor AG for electrical companies . The construction of the power plant was not started in the crisis and war years. After the concession had undergone several changes of hands, it was transferred to the NOK in 1948 , which immediately began building the power plant. The additional energy was urgently needed by the NOK, because since 1942 the electricity consumption has been greater than the production in its own plants, so that energy had to be obtained from external networks.

The first clearing work was completed in the winter of 1948/49, the actual construction work began in May 1949. In December 1952, the first machine went online, in May 1953 the second machine. The construction costs amounted to 86.7 million SFr., Which is a monetary value of 380 million SFr. in 2020 corresponds.

Construction railway

During the construction of the power plant, a construction railway was used alongside other heavy equipment . Their task was to move excavated material from the underwater canal to the dams in the area of ​​the impoundment, as well as to move quarry stones from the Auenstein quarry to the construction site. The track network had a track width of 75 cm and was at times 22 km long. On the stretch from the underwater canal to the storage area, electric locomotives operated with 500 V direct voltage were used, otherwise steam and diesel locomotives were used.

technology

Power plant building

The upper concession limit of the power plant is near Wildegg, where the concession area of the Rupperswil-Auenstein power plant is located above . The lower limit is 9.35 km downstream at the Brugg railway bridge . The machine house is roughly halfway along the 4.5 km long power plant canal. The main weir ▼ is located at the level of Schinznach-Bad and, together with the machine house, dams the Aare to the Holderbank reservoir , the water level of which is constant at 348 m above sea level through the weir . M. is held, while the underwater level of the power plant depending on the discharge of the Aare between 330.6 and 335.8 m above sea level. M. varies. A doping power plant in the weir processes the water released into the Aare river bed. Dams had to be built in the area of ​​the dam of the power plant, as the water level is four to four and a half meters above the surrounding area. The crests of the four meter wide dams are one and a half meters above the high water level. In Holderbank there is a pumping station , ▼ which the leachate pumps it back to the dams in the river Aare.

In order to prevent the groundwater level in the area of ​​the thermal springs of Schinznach-Bad from sinking due to the reduced runoff in the old Aare bed , an auxiliary weir ▼ was installed below the thermal bath . The weir is designed as a roof weir , another roof weir ▼ is located just before the confluence of the underwater canal . It served as a discharge structure for the Brugg power plant after the old weir was destroyed in a flood in 1940. As part of the renovation of the Aare for better debris transport, it is investigated whether the auxiliary weir and the roof weir can be removed. For this purpose, extensive tests with lowered weirs were carried out in autumn 2018.

Two vertical Kaplan turbines with a nominal output of 23 MW are installed in the machine house. Due to structural simplifications, the turbines rotate in the opposite direction.

literature

Web links

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

Individual evidence

  1. ↑ Wildegg-Brugg low-pressure run-of-river power plant (Canton Aargau). In: Power plants in Switzerland. Retrieved on May 29, 2020 (table hydropower plants in the canton of Aargau ).
  2. ↑ a b Northeast Swiss Power Plants, Part 1, p. 47
  3. ↑ Northeast Swiss Power Plants, Part 6, p. 145
  4. ↑ Northeast Swiss Power Plants, Part 1, p. 48
  5. ↑ FSO online computer. Retrieved May 29, 2020 .
  6. ↑ Northeast Swiss Power Plants, Part 1, p. 167
  7. ↑ Nora Güdemann: Accident without insurance: 100 years ago that had fatal consequences for workers in Aargau. In: Aargauer Zeitung. April 23, 2018, accessed on May 29, 2020 (Swiss Standard German).
  8. ↑ Northeast Swiss Power Plants, Part 1, p. 51
  9. ↑ 20 years of Aargau floodplain protection park . In: Environment Aargau . No. 43 , March 2015, p. 59 ( ag.ch [PDF]).
  10. ↑ Axpo: Evaluation of the flow test at the Wildegg-Brugg Aare power plant takes time. In: Aargauer Zeitung. December 13, 2018, accessed on May 31, 2020 (Swiss Standard German).
  11. ↑ Northeast Swiss Power Plants, Part 4, p. 93