Argel HPP
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Sevan–Hrazdan Cascade
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 Sevan
Hrazdan
Argel
Arzni
Kanaker
Yerevan-1
Yerevan-3
Locations of the Sevan–Hrazdan Cascade power plants in Armenia
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| Country | Armenia |
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| Location | Central Armenia |
| Purpose |
Hydroelectricity Irrigation |
| Status | Operational |
| Construction began | 1936 |
| Opening date | 1962 |
| Owner(s) | RusHydro |
| Operator(s) | International Energy Corporation |
| Power station | |
| Installed capacity | 560 MW |
| Annual generation | 500 GWh |
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Website www |
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Sevan HPP
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Gate of the Sevan HPP
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| Coordinates | 40°33′17″N 44°57′56″E / 40.55472°N 44.96556°E |
| Status | Operational |
| Power station | |
| Commission date | 1949 |
| Turbines | 2 X 17.1 MW |
| Installed capacity | 34.2 MW |
| Annual generation | 15 GWh |
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Hrazdan HPP
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Building of the Razdan HPP
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| Location | Atarbekyan |
| Coordinates | 40°30′29″N 44°45′39″E / 40.50806°N 44.76083°E |
| Status | Operational |
| Power station | |
| Commission date | 1959 |
| Turbines | 2 X 40.8 MW |
| Installed capacity | 81.6 MW |
| Annual generation | 40 GWh |
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Argel HPP
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Building of the Argel HPP
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| Location | Argel |
| Coordinates | 40°22′44″N 44°36′29″E / 40.37889°N 44.60806°E |
| Status | Operational |
| Reservoir | |
| Creates | Akhpara Reservoir |
| Total capacity | 5,600,000 m3 (4,500 acre·ft) |
| Active capacity | 4,100,000 m3 (3,300 acre·ft) |
| Power station | |
| Commission date | 1953 |
| Turbines | 4 x 56 MW |
| Installed capacity | 224 MW |
| Annual generation | 200 GWh |
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Arzni HPP
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Exit of the Arzni HPP
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| Location | Arzni |
| Coordinates | 40°17′49″N 44°35′19″E / 40.29694°N 44.58861°E |
| Status | Operational |
| Power station | |
| Commission date | 1956 |
| Turbines | 3 x 23.5 MW |
| Installed capacity | 70.6 MW |
| Annual generation | 80 GWh |
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Kanaker HPP
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View the Kanaker HPP
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| Location | Yerevan (Kanaker) |
| Coordinates | 40°13′14″N 44°31′06″E / 40.22056°N 44.51833°E |
| Status | Operational |
| Power station | |
| Commission date | 1936 |
| Turbines | 2 x 12.5 MW 2 x 25 MW |
| Installed capacity | 100 MW |
| Annual generation | 110 GWh |
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Yerevan-1 HPP
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Building of the Yerevan-1 HPP
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| Location | Yerevan |
| Coordinates | 40°11′22″N 44°29′56″E / 40.18944°N 44.49889°E |
| Status | Operational |
| Power station | |
| Commission date | 1962 |
| Turbines | 2 x 22 MW |
| Installed capacity | 44 MW |
| Annual generation | 50 GWh |
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Yerevan-3 HPP
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Building of the Yerevan-3 HPP
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| Location | Yerevan |
| Coordinates | 40°09′51″N 44°30′03″E / 40.16417°N 44.50083°E |
| Status | Operational |
| Power station | |
| Commission date | 1960 |
| Hydraulic head | 37 m (121 ft) |
| Turbines | 1 x 5 MW |
| Installed capacity | 5 MW |
| Annual generation | 50 GWh |
Sevan–Hrazdan Cascade (Armenian: Սևան-Հրազդան Կասկադ) is a complex of hydroelectric power plants on the Hrazdan River and its tributaries between the Lake Sevan and Yerevan in Armenia. They use irrigation water flow from the Lake Sevan and streams waters of Hrazdan River that gives an opportunity to irrigate 70% of Armenian agricultural lands. The cascade is owned by the International Energy Corporation (IEC), a subsidiary of RusHydro.
The first small-scale Yerevan HPP was built in 1923. In 1932, it was replaced by Yerevan-2 HPP. The construction of the current cascade started in 1936, when the Kanaker HPP was opened. That time it was planned to built the whole cascade by 1947. In 1940, construction of the Sevan HPP started but due to World War II, construction was suspended and the HPP became operational only in 1949. The largest HPP, Argel HPP, was opened in 1953, followed by Arzni HPP in 1953, Yerevan-3 HPP in 1955, Hrazdan HPP in 1959 and Yerevan-1 HPP in 1962. The original plan included also construction of three more HPPs—Upper Argavand HPP, Lower Argavand HPP and Noragavit HPP—but these plants were never built.
In 2003 the cascade was given to Inter RAO UES in return for US$25 million debt by Armenia. For operation of the cascade, the IEC was incorporated. In 2011, Rushydro bought the IEC from Inter RAO. In November 2015 it was published that Rushydro plans to sell the IEC.
The length of the Sevan–Hrazdan Cascade is about 70 kilometres (43 mi) and it consists of seven hydroelectric power plants (HPP), with total nominal capacity of 565 MW. The HPPs are Sevan, Hrazdan, Argel, Arzni, Kanaker, Yerevan-1 and Yerevan-3—all run-of-the-river type. The cascade produces about 10% of Armenia's electricity.
The operation of the Sevan–Hrazdan Cascade is dependent on amount of water supply from the Lake Sevan and it is suitable for the daily peak generation. Five HPPs operate all year long and two HPPs work only during the irrigation season when additional water is available in the system. Therefore the power generation during the winter is limited.
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Wikipedia