Chirkei HPP - the highest arch dam in Russia

Chirkei hydroelectric power plant located on the Sulak River in Dagestan. It is the largest hydroelectric power station in the North Caucasus and the highest arch dam in Russia. It is built in a narrow valley Chirkeyskaya deeper than 200 m, a width at the bottom of 12-15 m, on top - 300 m. Included in the Sulak hydroelectric. The installed capacity of hydropower plants - 1,000 MW. The average annual production of 2, 47 billion kWh.

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Chirkei hydroelectric plant built in a seismically active area, in complex geological conditions. Laying of concrete and installation work carried out using three cable cranes with lifting capacity of 25 tons and a span of 550 m.

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Construction was started in 1964. Overlapping river bed. Sulak was carried out by the collapse of the explosion of rock massif. The explosion had collapsed more than 65 m3 of rock. The total weight of the charge amounted to 37t.

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In 1974 it was put into operation the first hydraulic unit. The last quarter of the unit brought into operation in 1976. On the construction of hydropower plants were first used cable cranes for laying concrete in the dam body.

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The dam has a maximum height 232, 5 m, a length of 338 m crest axis.

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Arch lenticular curvature symmetrical shape, elastically embedded along the contour of the ground. The thickness of the arch dam varies from 6 m at the crest of up to 30 m in contact with the cork. Chirkei HPP is the largest of the three hydroelectric power stations with arch dams existing in Russia.

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Chirkei HPP, given its maneuverability, has become the main control station in the United power system of the South of Russia.

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Original technical solutions, unparalleled in the practice of hydraulic engineering, is a two-row arrangement of hydroelectric generators and suction tubes. This is to ensure that the powerhouse minimally etched into the steep side of the gorge.

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The building HPP 2 parallel computer room, and the machine rooms are combined so that the installation could be to use a common mounting platform. The transfer of the generator rotor weighing about 560 tons is produced by two cranes of 320 tons, the compounds of general traverse.

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4 Francis hydroelectric capacity of 250 MW, working at a head of your payable 170 m. Manufacturer hydroelectric generators - "Uralelectrotyazhmash»

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Water inlet from the dam CHGES originates 4 metal Pressure penstocks diameter of 5, 5 m. Reinforced concrete culverts shell has a thickness of 1, 5 m.

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Transformers and switchgear generator voltage are located on the ceiling machine room.

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The building is located directly at the hydropower plant downstream face of the dam cork.

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Open switchgear (ORU) 330 kV.

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Dispatch

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During the press tour conducted a planned overhaul of the 4th hydraulic unit and thus we were able to get into the drained hydraulic turbine volute. Scroll provides a uniform flow of water around the perimeter of the guide vanes, t. E. Axially symmetric mode of operation of the guide vanes. Passing water here has a pressure of 17 atmospheres in.

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At the moment, repair is completed and the hydraulic unit is put into operation. The diameter of the turbine wheel 4, 5 m, weight - 55 tons.

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Entrance to the building of hydroelectric power station through a tunnel length of 800 m on the right bank of the road.

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Source: gelio-nsk.livejournal.com

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