Inguri Dam
The Inguri Dam is a hydroelectric dam on the Inguri
River in Georgia. As long as construction on
the Xiaowan Dam in China
is not yet completed, it is the world's highest concrete arch dam with a height
of 272 metres (890 ft). It is located north of the town Jvari. It is
part of the Inguri hydroelectric power station (HES) which is partially located
in Abkhazia. Construction of the Inguri dam began in 1961. The dam became
temporary operational in 1978, and was completed in 1987. In 1994, the dam was
inspected by engineers of Hydro-Québec, who found that the dam was "in a
rare state of dilapidation". In 1999, the European Commission granted
€9.4 million to Georgia
for urgent repairs at the EInguri HES, including replacing the stoplog at the
arch dam on the Georgian side and, refurbishing one of the five generators of
the power station at the Abkhaz side. In total, €116 million loans were
granted by the EBRD, the European Union, the Japanese Government, KfW and
Government of Georgia.
Technical features
The Inguri
hydroelectric power station (HES) is a cascade of hydroelectric facilities
including, in addition to the dam - diversion installation of the Inguri HES
proper, the near-dam installation of the Perepad HES-1 and three similar
channel installations of the Perepad HESs-2, -3, and -4 located on the tailrace
emptying into the Black Sea. While the arch
dam is located on the Georgian controlled territory in Upper
Svanetia, the power station is located in the Gali district of
Abkhazia. Inguri HES has 20 turbines with a nominal capacity of 66 MW
each having a total capacity of 1,320 MW. Its average annual capacity is 3.8
billion kW/h, which is approximately 46% of the total electricity supply in Georgia as of
2007.
Zhinvali dam
 Zhinvali Hydro Power Plant is a large power plant in Georgia that has two turbines with
a nominal capacity of 65 MW each having a total capacity of 130 MW. The
first station utilizing the downstream flow of the Aragvi river is the Zhinvali
Hydro which is an integrated hydraulic scheme designed to generate electrical
energy, to supply with service and drinking water Tbili, Mtskheta, Rustavi, and adjacent
settlements, to irrigate lands of the lori gorge.
a water reservoir of 520 million m3 storage capacity is formed by a pebble-fill dam having a height of 102m and a
crest length of 415m. The hydraulic scheme also comprises a surface spillway; a
bottom outlet; a water intake; a 628m long tunnel-type conduit; an underground
power house; a 8.6 km
long free-flow tailrace tunnel, a 1.5 km long canal with an after bay at the end
to supply water to consumers during the shut-down periods of the station and
also to smooth down the rate of water discharge through the Aragvi channel in
the event of abrupt rise of the station load; a service and drinking water main
line, 36.7 km
long; a filtration station, 220 and 110 kV switchyard.
The turbine hall accommodates four hydropower units
with 32.5 MW Francis turbines and 32.5 MW overhung vertical shaft generators.
The station capacity is 130 MW, its annual power
output is 485 million kW.h. The generated energy is conveyed to the Georgia
Power System over 220 and 110 kV transmission lines.
Please login or register to add comments |
