Chirkey HPP - the highest arch dam in Russia
• Chirkey HPP - the highest arch dam in Russia
Chirkey 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 constructed in a narrow gorge Chirkeyskaya depth greater than 200 m, a width at the bottom of 12-15 m, on top - 300 m. Included Sulakskiy hydroelectric. Installed hydroelectric capacity - 1,000 MW. Average annual output 2, 47 TWh.
The general form.
Chirkey hydroelectric power plant built in a seismically active area, in complex geological conditions. Stacking installation work and concrete made using three cableways carrying capacity of 25 tons and a span of 550 m.
The construction was started in 1964. Overlapping river bed. Sulac collapse was effected by explosion of the rock mass. The explosion was collapsed more than 65 thousand. Cubic meters of rock. The total charge weight was 37 m.
In 1974 was put into operation the first hydraulic unit. Last fourth unit entered into operation in 1976. On the construction of hydropower plants were first used cable cranes for concrete in the dam body.
The dam has a maximum height 232, 5 m, a length of 338 m crest axis.
Arch curvature symmetrical biconvex contours, elastically embedded in the base of the loop.
The thickness of the arch dam changed from 6 m to 30 m crest in contact with the stopper.
Chirkey HPP is the largest of the three hydropower plants with arch dams, available in Russian.
Chirkey HPP, given its maneuvering capabilities, has become the main regulatory station in the United Energy System of Russia in the South.
Outdoor switchgear (ORU) 330 kV.
Along the crest of the dam on the summer pastures distilled sheep herds. Reservoir Chirkeyskaya HPP long-term regulation has a length of 40 km, maximum width - 5 km.
From rainwater openings CHGES dam originates 4 metal pressure turbine diameter conduit 5, 5 m. Concrete conduits shell has a thickness of 1 to 5 m.
The building of hydropower plants situated directly at the downstream face of the dam cork.
transformers and switchgear voltage generator are arranged on the ceiling machine room.
the original technical solutions, unparalleled in the practice of hydraulic engineering, is a two-row arrangement of hydraulic units and suction tubes. It made it to the power house minimally etched into the steep side of the gorge.
The power plant building 2 parallel machine room, with machine rooms combined in such a way that the installation could use a common mounting platform. Transfer generator rotor weight of approximately 560 m is produced by two cranes to 320 m, the compounds of general crosspiece.
4 Francis hydro unit capacity of 250 MW, operating at a head of 170 m Settlement .. Manufacturer hydroelectric generators - "Uralelectrotyazhmash".
During the press tour conducted a planned overhaul of the 4th hydraulic unit and because of this we were able to get into the drained hydraulic turbine volute. Volute provides a uniform flow of water around the perimeter of the guide vane, t. E. Axially symmetrical operation of the guide vanes. Water passing here has a pressure 17 atmospheres.
At the moment, the repair is completed and the hydraulic unit is put into operation.
The diameter of the turbine wheel 4, 5 m, weight - 55 tons.
HPP locked to the building through the tunnel 800 m by way of the right bank.
Crane on the crest of the dam.
Single spillway is formed as a tunnel with an open drain tray inside rock left bank. At 85 meters from the dam is disposed an inlet span of 22 meters.
From him under a lot of slope is a tunnel (12x9 meters) 160 meters long. Then it goes into the slightly inclined part 350 m long, and then a 221-meter open tray with a springboard and drain-side damper.
Segment Shutter height of 14 m.
Industrial spillway is capable of skipping the volume of water from 2400 to 2900 cubic meters. m.
The climate is arid alignment Chirkeyskaya HPP. In the history of hydroelectric exploitation Chirkeyskaya water dumped on empty all three times.
Technical corridors in the dam body
A special success was to shoot Chirkeyskaya HPP night.