The Grand'Maison Dam is an embankment dam on L'Eau d'Olle, a tributary of the Romanche River. It is located in Vaujany of Isère within the French Alps. The primary purpose of the dam is to serve as the upper reservoir for a pumped-storage hydroelectric scheme where Lac du Verney located lower in the valley is the lower reservoir. The dam was constructed between 1978 and 1985 with its power station being commissioned in 1987. With an installed capacity of 1,800 MW, it is the largest hydroelectric power station in France.[2]
The Grand'Maison is an embankment dam with a height of 140 m (459 ft) from the riverbed and 160 m (525 ft) from foundation. It is 550 m (1,804 ft) long and has a fill volume of 12,000,000 m3 (15,695,407 cu yd). The reservoir withheld by the dam, Lac de Grand Maison, has a storage capacity of 140,000,000 m3 (113,500 acre⋅ft). The power generation process begins with water stored in its reservoir at an altitude of 1,698 m (5,571 ft). By means of a 7,100 m (23,294 ft) long head-race tunnel which splits into three 1,450 m (4,757 ft) long penstocks, water is sent down to the power station. It is located on the rear bank of Lac du Verney at 45°08′43″N06°03′03″E / 45.14528°N 6.05083°E / 45.14528; 6.05083 (Grand'Maison Power Plant) which lies at an elevation of 770 m (2,526 ft). The power station has above-ground and below-ground levels. On the above-ground level, there are four 150 MW Pelton turbine-generators which are used for normal conventional hydroelectric power generation. The below-ground level contains eight 150 MW Francis pump turbines which can be used for both power generation and pumping. After electricity is generated, the water is discharged into Lac du Verney, the lower reservoir. When storage in Grand'Maison needs to be replenished, the turbines reverse into pumps and move water from Lac du Verney back to the Grand'Maison Reservoir. The change in elevation between the reservoirs afford the above-ground station a maximum hydraulic head of 920 m (3,018 ft) and the below-ground station 955 m (3,133 ft).[3]
The power station repeats the pumped-storage process as needed and acts as a peaking power plant. Power generation or pumping can be initiated within minutes. On an annual basis, the power station generates 1,420 GWh of electricity and consumes 1,720 GWh in pumping mode. Because pumping occurs during periods of low demand when electricity is cheaper than power generation during those of high demand, the power station is profitable.[3][4]
Wikimedia Commons has media related to Barrage de Grand'Maison.
References
^Donaghe, Robert T.; Chaney, Ronald C.; Marshall L. Silver, eds. (1988). Advanced triaxial testing of soil and rock. Philadelphia, PA: ASTM. p. 488. ISBN0-8031-0983-0.
^"Grand'Maison Dam, France" (PDF). Osmos. Retrieved 14 January 2012.[permanent dead link]
^ ab (in French). HydroWeb. Archived from the original on 3 November 2012. Retrieved 14 January 2012.
^"Upstream of The Romanche Valley" (in French). Planete TP. Retrieved 14 January 2012.
August 24, 2023
grand, maison, embankment, olle, tributary, romanche, river, located, vaujany, isère, within, french, alps, primary, purpose, serve, upper, reservoir, pumped, storage, hydroelectric, scheme, where, verney, located, lower, valley, lower, reservoir, constructed,. The Grand Maison Dam is an embankment dam on L Eau d Olle a tributary of the Romanche River It is located in Vaujany of Isere within the French Alps The primary purpose of the dam is to serve as the upper reservoir for a pumped storage hydroelectric scheme where Lac du Verney located lower in the valley is the lower reservoir The dam was constructed between 1978 and 1985 with its power station being commissioned in 1987 With an installed capacity of 1 800 MW it is the largest hydroelectric power station in France 2 Grand Maison pppLocation of Grand Maison ppp in FranceOfficial nameBarrage de Grand MaisonCountryFranceLocationVaujany IsereCoordinates45 12 21 N 06 07 01 E 45 20583 N 6 11694 E 45 20583 6 11694StatusOperationalConstruction began1978Opening date1985Owner s Electricite de France EDF Dam and spillwaysImpoundsEau d OlleHeight foundation 160 m 525 ft Height thalweg 140 m 459 ft Length550 m 1 804 ft Dam volume12 000 000 m3 15 695 407 cu yd 1 ReservoirCreatesLac de Grand MaisonTotal capacity140 000 000 m3 113 500 acre ft Power StationCommission date1987Hydraulic head955 m 3 133 ft max lower plant Turbines4 x 150 MW Pelton type8 x 150 MW Francis pump turbineInstalled capacity1 800 MWAnnual generation1 420 GWhDesign and operation EditThe Grand Maison is an embankment dam with a height of 140 m 459 ft from the riverbed and 160 m 525 ft from foundation It is 550 m 1 804 ft long and has a fill volume of 12 000 000 m3 15 695 407 cu yd The reservoir withheld by the dam Lac de Grand Maison has a storage capacity of 140 000 000 m3 113 500 acre ft The power generation process begins with water stored in its reservoir at an altitude of 1 698 m 5 571 ft By means of a 7 100 m 23 294 ft long head race tunnel which splits into three 1 450 m 4 757 ft long penstocks water is sent down to the power station It is located on the rear bank of Lac du Verney at 45 08 43 N 06 03 03 E 45 14528 N 6 05083 E 45 14528 6 05083 Grand Maison Power Plant which lies at an elevation of 770 m 2 526 ft The power station has above ground and below ground levels On the above ground level there are four 150 MW Pelton turbine generators which are used for normal conventional hydroelectric power generation The below ground level contains eight 150 MW Francis pump turbines which can be used for both power generation and pumping After electricity is generated the water is discharged into Lac du Verney the lower reservoir When storage in Grand Maison needs to be replenished the turbines reverse into pumps and move water from Lac du Verney back to the Grand Maison Reservoir The change in elevation between the reservoirs afford the above ground station a maximum hydraulic head of 920 m 3 018 ft and the below ground station 955 m 3 133 ft 3 The power station repeats the pumped storage process as needed and acts as a peaking power plant Power generation or pumping can be initiated within minutes On an annual basis the power station generates 1 420 GWh of electricity and consumes 1 720 GWh in pumping mode Because pumping occurs during periods of low demand when electricity is cheaper than power generation during those of high demand the power station is profitable 3 4 See also Edit France portal Water portal Renewable energy portalList of pumped storage hydroelectric power stations Renewable energy in France Wikimedia Commons has media related to Barrage de Grand Maison References Edit Donaghe Robert T Chaney Ronald C Marshall L Silver eds 1988 Advanced triaxial testing of soil and rock Philadelphia PA ASTM p 488 ISBN 0 8031 0983 0 Grand Maison Dam France PDF Osmos Retrieved 14 January 2012 permanent dead link a b Grand Maison in French HydroWeb Archived from the original on 3 November 2012 Retrieved 14 January 2012 Upstream of The Romanche Valley in French Planete TP Retrieved 14 January 2012 Retrieved from https en wikipedia org w index php title Grand 27Maison Dam amp oldid 1141425600, wikipedia, wiki, book, books, library,
