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Inside the Robert-Bourassa generating station, in northern Quebec, the world's largest underground power station, with an installed capacity of 5,616 MW.. An underground power station is a type of hydroelectric power station constructed by excavating the major components (e.g. machine hall, penstocks, and tailrace) from rock, rather than the more common surface-based construction methods.
The power station has two hydro turbine generator sets, each rated at 60 MW, giving the station a total capacity of 120 MW. The tailrace tunnel, which flows into the Tongariro River, is 3-kilometre (1.9 mi) long.
Manapōuri Power Station is an underground hydroelectric power station on the western arm of Lake Manapouri in Fiordland National Park, in the South Island of New Zealand. At 854 MW installed capacity (although limited to 800 MW due to resource consent limits [ 3 ] ), it is the largest hydroelectric power station in New Zealand, and the second ...
The project included the construction of a new power plant intake, power house, tailrace channel and penstocks. It was completed in January 2000 and increased the installed capacity of the power plant from 52.5 MW to 90 MW. The old powerhouse currently serves as a tourist attraction known as the Stave Falls Visitor Centre. [4]
The catchment basin of the source, especially the Bambarabatu Oya sub-catchment, experiences some of the highest and most consistent rainfall in Sri Lanka. In total, the plant has a catchment area of 172.58km2. The project comprises a diversion weir, intake, headrace channel, forebay, penstocks, powerhouse, tailrace, and switchyard.
The plant serves as an important element for peak power generation and grid balancing in the TVA system. Construction was started in 1970 and was completed in 1978. [7] The plant was idled in March 2012 due to cracks in the generators' rotors. The plant came entirely back on line in April 2014. [8] Diagram of the facility The underground powerhouse
Turbines in the power house generate electricity to power the adjacent aluminium smelting plant. The power house and smelter are located to the northeast of Fort William, on the eastern bank of the River Lochy, into which the tailrace discharges. The scheme was expanded to increase output to meet demand for aluminium in World War II. [3]
The tailrace feeds back into the Allt Mor. A buried cable carries the generated power away to a transformer, connecting the scheme to the 33 kV network on Arran. The cost of the project was around £315,000, and it had to be completed by 19 December 2015 in order to qualify for the feed-in tariffs negotiated at the beginning of the project. The ...