Säckingen underground power station
| Säckingen underground power station | ||
|---|---|---|
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| location | ||
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| Coordinates | 47 ° 33 '56 " N , 7 ° 57' 25" E | |
| country |
 Germany
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| place | Bad Säckingen | |
| Waters | Upper basin: Eggberg basin Lower basin: Rhine |
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| power plant | ||
| owner | Schluchseewerk AG | |
| operator | Schluchseewerk AG | |
| Start of planning | November 1961 | |
| Start of operation | 1967 | |
| technology | ||
| Bottleneck performance | Generator operation: 360 megawatts Pump operation: 300 megawatts |
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| Turbines | 4 ternary machine sets with 4 × 90 MW turbine and 3 × 70 MW / 1 × 89 MW pump power, Francis design , Escher-Wyss / Voith | |
| Others | ||
| Website | www.schluchseewerk.de | |
The Säckingen cavern power plant is a pumped storage power plant operated by Schluchseewerk AG with 360 MW generator and 300 MW pump capacity in Bad Säckingen . It is located in a cavern 161 meters long, 23 meters wide and 33.6 meters high, which can be reached via a 1.5 kilometer long access tunnel.
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The Eggberg Basin serves as the upper basin and the Rhine acts as the lower basin . The vertical pressure shaft is 400 meters long and 4.3 meters in diameter. There is a connection to the Rhine via the underwater tunnel with a length of 2 kilometers and a diameter of 5.5 meters. The electrical energy provided in generator mode or required in pump mode is transported to and from the Kühmoos substation with a nominal voltage of 235 kV via oil pressure cables in a cable gallery and a subsequent 3 km long overhead line . The switchgear is located at the juncture between the cable and overhead line at 47 ° 34 '19 " N , 7 ° 57' 26" O .
About 18% of the fed-in power comes from natural tributaries that reach the upper basin via brooks and a tunnel. The Säckingen Rhine power plant and the Ryburg-Schwörstadt power plant readjust the unsteady flow of water through the pumped storage power plant with its reservoirs.
Technical features
- At the time of its construction, the power plant was the first German pumped storage plant to use cavern construction and, after the Vianden pumped storage plant that went into operation shortly before (1964), the second in Europe.
- In pumping mode, the turbine is decoupled by an overrunning clutch , which increases efficiency and shortens the switchover time.
- Three storage pumps in back-to-back design (92% efficiency)
- one throttle valve per machine
See also
Web links
- The Säckingen underground power station - Schluchseewerk AG