Rupperswil-Auenstein power plant

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Rupperswil-Auenstein power plant
Rupperswil-Auenstein power plant 20130309.JPG
location
Rupperswil-Auenstein power plant (Canton of Aargau)
Rupperswil-Auenstein power plant
Coordinates 651027  /  251426 coordinates: 47 ° 24 '42 "  N , 8 ° 6' 53"  O ; CH1903:  651027  /  251426
country Switzerland
place Rupperswil , Auenstein AG
Waters Aare
f1
power plant
owner Rupperswil-Auenstein AG power plant:
operator Axpo Hydroenergy
Start of planning 1941
construction time 1942-1945
Start of operation 1945
technology
Bottleneck performance 40 megawatts
Average
height of fall 		9.75 to 11.6 meters m
Expansion flow 492 m³ / s
Standard work capacity 212 million kWh / year
Turbines 2 Kaplan turbines of 20 MW each

1 doping turbine of 1.7 MW

Generators 1 single-phase synchronous machine 16 Hz à 30 MVA (SBB)

1 three-phase synchronous machine 50 Hz à 22 MVA (AXPO)

Others

The Rupperswil-Auenstein (KRA) power plant is a run-of-river power plant on the Aare , between the Aargau communities of Rupperswil and Auenstein .

history

The plant was planned from 1941 to meet the increasing energy demand. Due to a lack of fuel due to the Second World War , the consumption of electricity in the supply area of ​​the Nordostschweizerische Kraftwerke (NOK), the forerunner of today's Axpo AG, increased . At the same time, SBB was looking for a way to build a power plant for generating traction current . A first project could not be carried out due to resistance from the Jura cement factories . The SBB fought for the water rights for the construction of the power plant with the help of the water law at the time that the federal government could use a body of water for its transport companies and received an unlimited commission.

In June 1941, the Rupperswil-Auenstein AG power plant, based in Aarau, was founded, which was the owner and operator of the plant to be built. The shareholders were NOK with a stake of 45% and the Swiss Federal Railways (SBB) with a stake of 55%. Both shareholders were entitled to half of the energy generated.

At the end of the hydrological year 2018/2019, SBB took over the share of Axpo, making it the sole owner of the power plant. The Rupperswil-Auenstein AG power plant is dissolved. Template: future / in 2 yearsPartial renovation work on the power plant began in July 2020, for which CHF 43 million. To be invested. The work will take a year, with the three-phase generator being replaced by a single-phase traction current generator . In the future, the main power station will only produce traction power and should be able to cover around 10% of the entire traction power requirement of SBB. The unrestricted license will be replaced by a standard license.

construction

In the second half of 1942, the work to build the power plant was awarded. Despite the war years, around 1050 men were employed on the construction site. The construction costs of the power plant were estimated at CHF 50 million in 1943. The excavation of 2.2 million m³ of earth for the underwater canal was particularly complex. The material was used to fill a dam between the mouth of the Suhre and the weir and to fill in the low-lying terrain at Biberstein , Auenstein and Wildegg . A smaller part was also used for the manufacture of concrete.

A works railway with a track width of 75 cm was laid out to transport the excavation . One of the steam locomotives used has been owned by the Schinznacher Baumschulbahn since 1999 . It was built by SLM in 1944 and was discontinued as No. 11 Wildegg . She goes by the name Molly at the nursery railway .

With the construction of the canal dams, the headwater canal of the Steiner spinning mill in Rupperswil was cut off from the Aare at the inlet structure.

technology

The power plant has an output of 40 MW, which is generated by two Kaplan turbines . It uses the gradient of the Aare over a river length of 7.3 km, which results in an average drop of almost eleven meters. The generator of the turbine group in the north generated 50 Hz electricity for the national supply, but was replaced by a 16.7 Hz traction current generator in 2020 and 2012; the generator in the group in the south generates traction current from the start.

The average annual production is 212 million kWh. The energy generated is fed to a shared substation and from there it is mainly transported on three- phase and traction current lines . Except for the traction current by Kerzers it these are hybrid cables with three -phase current - bundle conductors and four train conductor . The overhead line masts were built by the NOK for a voltage level of 220  kV . The Rupperswil-Muttenz traction power line is an exception .

photos

  • Underwater side of the engine house

  • Weir at a discharge of about 660m3 / s

  • Traction generator rotor during installation

See also

literature

  • A. Zwygart: The Rupperswil-Auenstein power plant and the energy supply for our country . In: Schweizerische Bauzeitung . tape 122 , no. 20 , 1943, pp. 246-247 , doi : 10.5169 / seals-53203 .
  • The Rupperswil-Auenstein power plant . In: AG. Rupperswil-Auenstein power plants (ed.): Swiss construction newspaper . 1950.

Web links

Commons : Rupperswil-Auenstein power plant  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f g h i j Rupperswil-Auenstein AG power plant. Low-pressure run-of-river power plant on the Aare. Axpo Holding AG, 2009, archived from the original on January 28, 2015 ; Retrieved August 21, 2011 .
  2. ↑ a b Chronik NOK / Axpo 1899–1914 - 2014. (PDF) Axpo Holding AG, 2014, accessed on August 28, 2016 .
  3. ^ Hugo Marfurt: The power plant "Rüchlig" of the Jura-Cement-Farbiken Aarau . 1964, p. 36-48 , doi : 10.5169 / SEALS-559004 .
  4. ^ Rupperswil-Auenstein AG power plant. In: Zefix. Retrieved July 2, 2020 .
  5. ↑ News in brief . In: SVEA (Ed.): Railway Amateur . No. 7 , 2020, p. 307 .