Glems pumped storage plant
| Glems pumped storage plant | |||
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| location | |||
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| Coordinates | 48 ° 30 '18 " N , 9 ° 17' 12" E | ||
| country | Germany | ||
| Waters | Tiefenbach | ||
| Data | |||
| Type | pumped storage power plant | ||
| Primary energy | Hydropower | ||
| power | Turbines: 90 megawatts. Pumps: 68 megawatts |
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| owner | EnBW Kraftwerke AG | ||
| Start of operations | 1964 | ||
| turbine | 2 Francis turbines of 45 MW each, 2 pumps of 34 MW each |
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The Glems pumped storage plant , south of Metzingen near Glems, was built between 1962 and 1964 by what was then the Technical Works of the City of Stuttgart . From 1997 it belonged to Neckarwerke Stuttgart , now - since October 2003 - to EnBW Kraftwerke AG . The pumped storage plant has an output of 90 MW, which is obtained from two Francis turbines of 45 MW each. It is connected to the high-voltage network of the distribution network operator Netze BW via the Metzingen switchgear via a two-circuit 110 kV three-phase line.
description
The power plant consists of a lower basin with a power house and an upper basin located 283 m (mean height) higher. These two basins are connected by a 1415 m long headrace pipe with a diameter of 3 m. The lower basin has a capacity of 1.2 million m³, of which 810,000 m³ are usable. The upper basin has a storage space of 900,000 m³, which is available for generating electricity. With the contents of the upper basin, the turbine can be operated for 6.5 hours with an output of 90 MW. The energy content - converted into electricity - is 560 MWh. The time required to pump the net content into the upper basin is 11 hours. The pumping power is slightly lower than the turbine power; it is 2 × 34 MW = 68 MW.
The peculiarity of this pumped storage plant is that it can also generate valuable control power in pumping mode, based on the hydraulic short circuit principle . Part of the pumped water is fed directly to the turbines. For this, the control of the turbines and pumps had to be modified in 2001. Although the efficiency is lower in this mode of operation, it is possible to switch between net current consumption and output with a short switchover time - important for network control .
The upper basin has a ring dam up to 19.5 m high. It is sealed with asphalt inside, both on the embankment and on the bottom of the pool. The lower basin, the Tiefenbachtalsperre , has a 26 m high dam made of earth material. The dam crest is 459.70 m above sea level. The Tiefenbach, which flows through the lower basin, flows into the Glemsbach and with this into the Erms .
Upper reservoir
Lower basin
Turbine and pump hall of the plant
Lower reservoir at night with reservoir hotel and power house
Redevelopment of the lower basin in 2014
The renovation of the lower basin began in March 2014. For this purpose, the dam was completely emptied, part of the water was pumped into the upper basin, the rest was diverted via the Tiefenbach. The aim of the renovation is to replace the bottom outlet with two new closures. The renovation is expected to be completed in October 2014.
See also
- List of hydropower plants in Germany
- List of pumped storage power plants in Germany
- List of dams in Germany
Individual evidence
- ↑ Federal Network Agency power plant list (nationwide; all network and transformer levels) as of July 2nd, 2012. ( Microsoft Excel file, 1.6 MiB) Archived from the original on July 22, 2012 ; Retrieved July 21, 2012 .
- ↑ Source: EnBW construction board at the construction site
