Tashkent, Uzbekistan, Feb. 5
By Demir Azizov- Trend:
The second hydraulic power unit has been modernized at Uzbekistan's Charvak hydropower plant, Uzbek State Joint Stock Company Uzbekenergo told Trend.
The Charvak hydropower plant is the largest hydropower plant in the Chirchik-Bozsu cascade of hydropower plants.
This work was conducted as part of a contract on the modernization of four hydraulic power units of the hydropower plant signed with the Russian Power Machines Company.
The first hydraulic power unit was modernized by replacing an impeller in October 2014.
Uzbekenergo concluded a contract with the Russian company 'Power Machines' for the modernization of three hydraulic power units at the Charvak hydropower plant in 2012.
The company will replace the stator's winding on the hydro-generators and install new feed systems on them.
For the first, second and fourth hydraulic power units, the Power Machines will produce three hydro-turbine impulse wheels.
Moreover, the hydro-mechanical part of the regulators and oil pressure units will be modernized on all four hydraulic power units. The system of automatic control of hydraulic power units will be reconstructed by means of creating a visual control and management system.
The project will increase the capacity of each hydraulic power unit from 155 megawatts to 175 megawatts, which will give an opportunity to generate an additional 120 million kilowatt hours of electricity annually.
It is expected that the implementation of the project with the total cost of $53.79 million will be completed in the H2 of 2015.
The project is financed with the own funds of Uzbekenergo and a $35 million worth of loan from the Fund for Reconstruction and Development of Uzbekistan.
Charvak plant is the most powerful hydro power plant within the Chirchik-Bozsu cascade of hydro power plants - a complex of hydraulic structures on the Chirchik River in Tashkent province. The capacity of the plant is 620 megawatt, while the average annual generation is two billion kilowatt hours.
Chirchik-Bozsu cascade of hydropower plants is divided into five cascades, namely, Orta Chirchik hydro power plant (885 megawatt), Chirchik hydro power plant (190.7 megawatt), Kadyrin hydro power plant (44.6 megawatt), Tashkent hydro power plant (29 megawatt) and Lower Bozsu hydro power plant (50.9 megawatt).
The total installed capacity of all the hydro power plants is equal to 1,200 megawatt, while the average annual generation is 4.67 billion kilowatt hours.
Uzbekistan plans to build seven new hydro power plants with a total capacity of 937.6 megawatt till 2021. The project cost is estimated at nearly $1 billion.
Currently, 45 power plants with the total capacity of nearly 12,800 megawatt operate in Uzbekistan's power supply system.
The major part of electricity in the country - up to 90 percent - is produced by 10 thermal power plants of Uzbekenergo with a total installed capacity of 10.6 million kilowatt. Some 29 hydro power plants with the installed capacity of 1.4 million kilowatt are mostly united within the hydro power plant cascades.
The remaining part of the electricity is generated by autonomous thermal power plants of industrial enterprises and small hydro power plants, owned by the Ministry of Agriculture and Water Resources of Uzbekistan.
Edited by SI