Dießbach power plant
| Dießbach power plant | |||
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| location | |||
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| Coordinates | 47 ° 29 '29 " N , 12 ° 49' 5" E | ||
| country | Austria | ||
| place | Saalfelden at the Stone Sea | ||
| Waters | Dießbach reservoir | ||
| Data | |||
| Type | pumped storage power plant | ||
| Primary energy | Hydropower | ||
| power | 24 MW in turbine operation, 32 MW in pump operation | ||
| operator | Salzburg AG | ||
| Project start | 1961 | ||
| Start of operations | 1964 | ||
| turbine | two free-jet Pelton turbines | ||
| Energy fed in per year | 36 GWh | ||
| was standing | October 2018 | ||
The power plant Dießbach is a hydroelectric power plant in the town of Saalfelden in the Austrian province of Salzburg . The power house is located in the Pinzgauer Saalachtal on the B 311 ( Pinzgauer Straße ).
The Dießbach reservoir serves as the upper basin of the pumped storage power plant . The water reaches the water lock on the shock wall via a 1.5 kilometer long tunnel under the Rauchkopf and via a pressure pipe on the shock wall, one of the steepest in Europe, down south to the power plant in the Saalachtal . The two free-jet Pelton turbines have at a design flow of 4 m / s and a gross drop height of 728.5 m, a rated output of 12.5 MW , the maximum capacity is 24 MW. Without the effects of the pump storage operation, a standard energy capacity of 36 GWh per year is achieved.
history
The implementation of the original project as a storage power plant began on October 1, 1961 with the construction of the road towards the Kallbrunnalm to the planned reservoir area. Construction of the power plant began on January 11, 1962. In June 1962, construction of the Dießbach reservoir began. The stop of the headrace tunnel took place on 3 September 1962 the Tunnel breakthrough on 30 May 1963. On 12 February 1964, the trial operation of the power plant was taken with the first machine unit, the Inauguration of Diessbach power plant took place on September 3, 1964 in the presence of Governor Hans Lechner . In 1968, the preliminary final expansion was achieved with the second machine set.
Expansions to pump storage
The expansion to a pumped storage power plant began in 2017. Instead of the previous underwater canal to the Saalach, a lower basin was built next to the existing building stock to provide water for the pumps. This naturally designed basin holds 40,000 m³ and is connected to the groundwater in the valley floor of the Saalach. The processed water is also stored in this basin when the power plant is in operation.
The new pump hall was built next to the turbine hall. A so-called matrix pump was installed in this, which pumps the water from the lower basin through the existing pressure pipeline back into the upper Dießbachsee basin during times of low load so that it can be processed again by the existing Pelton turbines during peak load times . The matrix pump consists of 24 individual radial pumps with a nominal output of 1,259 kW each, which are arranged in four cascades or strings of six pumps each. Each line has an air chamber to dampen pressure surges. Due to this small division, the power consumption of the system in pumping operation can be adapted to the network situation in very small steps by connecting and disconnecting individual units; on the other hand, each pump is operated individually at full load with optimal efficiency. In addition, frequency converters are installed that allow the machines to be controlled from 1,500 to 3,060 rpm. At full load of all pumps, the total power consumption is 32 MW and the flow rate is 3.3 m³ / s. The plant was put into operation in October 2018. The investment costs were around 30 million euros.
literature
- Christine Klenovec, Christine Haitzmann: Alpine history in a nutshell . Weißbach near Lofer. Ed .: Austrian Alpine Association. Innsbruck 2014, p. 85-88 ( digitized version ).
Web links
- Power plant group Pinzgau , Salzburg AG (PDF)
Individual evidence
- ↑ Innovative matrix pump technology makes the Diessbach power plant future-proof. In: zek future energy and municipal technology , issue 6 / December 2018, page 18 ff.
- ^ Salzburg24 (Ed.): New storage power plant in Dießbach in operation . October 23, 2018 ( online ).
- ^ Salzburger Nachrichten (ed.): Saalfelden: Dießbach pumped storage power plant is being expanded . May 19, 2017 ( online ).