Roselend Dam

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Roselend Dam
Lac du Roselend02.jpg
Location: Savoy , France
Major cities nearby: Albertville
Roselend Dam (Savoie)
Roselend Dam
Coordinates 45 ° 41 ′ 0 ″  N , 6 ° 37 ′ 0 ″  E Coordinates: 45 ° 41 ′ 0 ″  N , 6 ° 37 ′ 0 ″  E
Data on the structure
Construction time: 1955-1962
Height above valley floor: 149 m
Height above foundation level : 150 m
Height of the structure crown: 1559.00 m
Building volume: 925,000 m³
Crown length: 804 m
Crown width: 3 m
Base width: 22 m
Radius of curvature : 215 m
Power plant output: 546 MW
Data on the reservoir
Altitude (at congestion destination ) 1557.00 m
Water surface 3.2 km²dep1
Storage space 185 million m³
Total storage space : 187 million m³
Catchment area 44 km²
Design flood : 90 m³ / s

The Roselend dam (French: Barrage de Roselend ) is a large dam in the Beaufortin massif near Albertville , Savoy , in the Auvergne-Rhône-Alpes region in France . It was put into operation in 1960. The dammed river is the Doron ; the reservoir is called Lac de Roselend . The dam is part of the Roselend-La Bathie hydropower plant.

Building

The barrier structure is a combination of an arch dam which closes the Doron Gorge and two pier dams. The vertical radius of the arch dam, which is 21 meters thick at the base, is 215 m, the horizontal 127 m; on the north side is the Méraillet dam. The wall, which consists of 22 pillars, is straight at first and then within a radius of 525 m. The much shorter connecting wall with only four pillars connects to the south side. The crown of the entire structure has a length of 804 m.

The engineers Jean Bellier and André Coyne and the architect Henri Marty were involved in the construction. The arched wall was built from elements 12.5 m wide. The pillars of the adjacent dams are each 20 m wide. The concrete work took place in the summer months from 1957 to 1961. The damming of the lake began on May 7, 1961. The dam is the fourth highest in France and the largest in France in terms of concrete volume. The Roselend dam bears the name of the lake-flooded village of Roselend.

  • Looking north. Arch dam of the Doron gorge, behind the Méraillet dam.

  • Pier dam of the Méraillet dam

  • Reservoir with the pier dam

Roselend-La Bathie hydropower plant

Situation map

Roselend-La Bathie hydropower plant

history

Construction work on the Roselend-La Bathie hydropower plant began in 1956. It was the largest hydropower plant in France in 1959, but construction was not yet completed at the time. With the partial commissioning of the power plant in 1960 and the full commissioning in 1961, the Fontanus power plant center was shut down and the annual production of the existing power plants on the Doron was reduced, whereby an annual production of around 250 million kWh was lost, but this more than made up for by the new plant with 1 billion kWh has been. The Fontanuz power station processed the water from the Doron immediately below the Roselend Dam, and the water from the Gittaz and Torrent des Glaciers was also fed to it. The supply tunnels required for this were taken over into the new system as the supply line to the Roselend Dam. In 1967, Lac de la Gittaz, the last part of the facility for the time being, was put into operation. In 2018, the increase in output of the main power plant center should be completed. [outdated]

Storage basin

The Roseland dam is part of the Roselend-La Bathie hydropower plant, which comprises two power stations and three reservoirs. The largest reservoir is the Lac de Roselend dammed by the Roselend dam . The two smaller reservoirs are Lac de Saint-Guérin , built between 1957 and 1961, and Lac de la Gittaz , built between 1962 and 1967, each with a capacity of 13,000,000 m³.

The lakes are supplied with water through a 30 km system of supply tunnels. The main collecting canal has 13 water catchments and guides the water from the Torrent des Glaciers, which comes from the Col de la Seigne , and other tributaries in the upper catchment area of ​​the Isère into the Roselend reservoir.

Storage basin location Municipal area construction Congestion destination
[m. ü. M.] 		Water surface
in km² 		Total storage space
in million m³
Lac de Roselend 45 ° 41 ′ 12 "  N , 6 ° 37 ′ 54"  E Beaufort (Savoie) 1955-1962 1557 3.20 187
Lac de Saint-Guérin 45 ° 38 ′ 45 "  N , 6 ° 34 ′ 47"  E Beaufort (Savoie) 1957-1961 1557 0.50 13
Lac de la Gittaz 45 ° 42 ′ 38 "  N , 6 ° 39 ′ 8"  E Beaufort (Savoie) 1962-1967 1562 0.39 13

Power plant control centers

Overview

Headquarters location Municipal area Installation Machine house
[m. ü. M.] 		Annual production
in kWh 		electrical power
in MW 		Turbines Raw fall height
in m 		business comment
La Bâthie 45 ° 38 ′ 40.8 "  N , 6 ° 26 ′ 36.5"  E La Bâthie 1960 355 1 billion 550 6 vertical Pelton turbines 1200 High pressure storage power plant Main center of the plant
Sauces 45 ° 41 ′ 49.9 "  N , 6 ° 39 ′ 17.1"  E Beaufort (Savoie) 1963 1570 45.8 million 18th 1 Francis turbines 106 Medium pressure run-of-river power plant produces only intermittently in winter and continuously in summer
Pierre Giret 45 ° 37 ′ 6 "  N , 6 ° 55 ′ 11.5"  E Sainte-Foy-Tarentaise 1726 6.2 Low - pressure run-of-river power plant

La Bâthie power plant center

The water from Lac de Roselend is fed through a 12.5 km long pressure tunnel and the subsequent 2.5 km long pressure pipe to the Bâthie power plant center , which is operated as a storage power plant. The water from the Lac de Saint-Guérin is let into the tunnel coming from the Lac de Roselend via a valve , the Lac de la Gittaz is connected to the Lac de Roselend via a tunnel .

The power plant's nacelle is located in a cavern, in front of which is the slide valve cavern with the shut-off devices for the turbines. The water is processed by Pelton turbines with a head of 1200 m . Each of the six vertically arranged machine sets has an output of 92 MW.

The total output of the plant is 546 MW, and 1070 GWh are produced annually. The system is remotely controlled from the Center de Conduite Hydraulique (CCH), the control center for the EDF hydropower plants in Lyon . The black start-capable power plant can feed full power into the grid within 13 minutes.

The water processed in La Bâthie is fed to the retention basin in the immediate vicinity of the machine house between the Isère river bed and the RN90 national road, which has a capacity of 50,000 m³.

Expansion in 2018

The power plant was expanded further. The output is increased to 100 MW per machine group. This also increases the overall efficiency. This is achieved through improved inlets and nozzles as well as new Pelton wheels. The block transformer and the electrical equipment of the groups will also be renewed. The entire renovation project will last until 2018 and has budgeted costs of EUR 50 million.

After completion of the renovation work, it will have an output of 600 MW.

Power plant central sauces

The water from the main collection canal is processed by the Sauces power station before it enters the Lac de Roselend . It consists of a single machine set remotely controlled by Beaufort with a Francis turbine , which has an output of 18 MW. The water is processed with a drop height of 106 m. The plant was put into operation in 1963. It works as a run-of-river power plant , but has to be switched off temporarily in winter because of the low inflow at this altitude.

Pierre Giret power plant center

The Pierre Giret power plant center with an output of 6.2 MW is located at the inlet of the main collecting duct . Administratively, it does not belong to the Roselend-La Bathie hydropower plant , but to the Tignes Malgovert hydropower plant .

See also

literature

  • The Roselend-La Bathie storage power plant in Savoy . In: Schweizerische Bauzeitung . tape 77 , no. 35 , 1959, pp. 563-566 , doi : 10.5169 / seals-84313 .
  • I. Pousse: Alpes: aménagement de Roselend - Le barrage de Roselend. In: Travaux. 1958. (French)
  • J.-P. Lajeat: Aménagement de Roselend: le barrage de Roselend. In: Travaux. May 1961. (French)
  • B. Wong: Barrage de Roselend. Mise en oeuvre d'un "tapis amont" pour maîtriser les fuites en fondations - Leçons pour les projets à venir. In: Travaux. February 1986. (French)

Web links

Commons : Roselend Dam  - collection of images, videos, and audio files

Individual evidence

  1. ↑ a b Swiss construction newspaper. 1959.
  2. ↑ Lionel Berthet: La Bathie-Roselend - Un complexe hydroélectrique qui tourne. November 22, 2011. Retrieved September 27, 2017 .
  3. ↑ Olive White, 2011.
  4. ↑ a b c d e EDF Unité de Production Alpes (ed.): Aménagement de Roselend - La Bâthie . Grenoble March 2011 ( PDF ).
  5. ↑ Le Beaufortain (ed.): Barrages, lacs et hydroélectricité . ( pdf ).
  6. ^ A b La centrale hydroélectrique de Roselend-La Bâthie gagne en puissance. In: L'énergie en questions. EDF, April 30, 2015, accessed September 27, 2017 (fr-fr).
  7. ↑ Description of all hydraulically connected dams and their location on christianb.e-monsite.com
  8. ↑ Report on the expansion of the power plant on 123savoie.com
  9. ^ EDF - Unité de Production Alpes (ed.): Travaux d'augmentation de puissance de la centrale hydroélectrique de la Bâthie (73) . Grenoble May 2012 ( PDF ).
  10. ↑ RTE (ed.): Registre des installations de production raccordées au réseau public de transport d'électricité . June 2016, p. 27 ( PDF ).
  11. ^ EDF Unité de Production Alpes (ed.): Aménagement de Tignes Malgovert . Grenoble, S. 2 ( PDF ).