Dharasu Power Station

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Dharasu Power Station
CountryIndia
Location Dharasu, Uttarakhand
Coordinates 30°36′26″N78°19′09″E / 30.60722°N 78.31917°E / 30.60722; 78.31917 Coordinates: 30°36′26″N78°19′09″E / 30.60722°N 78.31917°E / 30.60722; 78.31917
StatusOperational
Construction began1979
Opening date2008
Owner(s)Uttarakhand Jal Vidyut Nigam Limited
Power Station
Hydraulic head 247.6 m (812 ft) (design)
Turbines 4 x 76 MW Francis-type
Installed capacity 304 MW

The Dharasu Power Station is a run-of-the-river hydroelectric power station on the Bhagirathi River located at Dharasu in Uttarkashi district, Uttarakhand, India. The power station was commissioned in 2008 and has a 304 MW capacity.

Bhagirathi River river

The Bhāgīrathī (Pron:/ˌbʌgɪˈɹɑːθɪ/) is a turbulent Himalayan river in the Indian state of Uttarakhand, and one of the two headstreams of the Ganges, the major river of Northern India and considered holy in Hinduism. In Hindu faith and culture, the Bhagirathi is considered the source stream of the Ganges. However, in hydrology, the other headstream, Alaknanda, is considered the source stream on account of its great length and discharge.

Dharasu town in Uttarakhand, India

Dharasu is a town in Uttarkashi district, Uttarakhand, India.

Uttarkashi district District in Uttarakhand, India

Uttarkashi District is a district of Garhwal division of the Uttarakhand state in northern India, and has its headquarters at Uttarkashi city. It has six Tehsils named after Barkot, Bhatwadi, Chinyali Saur, Dunda, Purola and Mori.

Contents

Background

The power station is stage two of the Maneri Bhali Hydroelectric Project which was planned in the 1960s. In 1979, construction on stage two began. In 1984, the first stage, the 90 MW Tiloth Power Plant located upstream at Uttarkashi at 30°43′36″N78°26′44″E / 30.72667°N 78.44556°E / 30.72667; 78.44556 (Tiloth Power Station) was completed. Dharasu, the second stage was halted in 1990 due to funding issues and was not restarted until 2002. [1] The power station was eventually completed and commissioned by 2008. [2]

Design

Water supplied to the power station is first diverted from the Bhagirathi River into a 16 km (10 mi) long tunnel by the 81 m (266 ft) long Bhali (Joshiyara) Dam located upstream near Bhali at 30°43′46″N78°25′25″E / 30.72944°N 78.42361°E / 30.72944; 78.42361 (Joshiyara Barrage) . The difference in elevation between the barrage and the power station affords a design hydraulic head of 247.6 m (812 ft) and gross head of 285 m (935 ft). The water powers four 76 MW Francis turbine-generators before being discharged back into the river. The design discharge of the power station is 142 m3/s (5,015 cu ft/s). [2] [3]

Hydraulic head Specific measurement of liquid pressure above a geodetic datum

Hydraulic head or piezometric head is a specific measurement of liquid pressure above a vertical datum.

Francis turbine type of water turbine that was developed by James B. Francis in Lowell, Massachusetts

The Francis turbine is a type of water turbine that was developed by James B. Francis in Lowell, Massachusetts. It is an inward-flow reaction turbine that combines radial and axial flow concepts.

See also

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The Maneri Bhali Hydroelectric Project in Uttarakhand, India refers to one of its two stages:

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References

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  1. "Power from Maneri Bhali by year-end". Outlook India. 12 March 2006. Retrieved 11 July 2011.
  2. 1 2 "Dharasu HEP (4x76=304 MW)". Uttaranchal Jal Vidyut Nigam Limited. Archived from the original on 27 December 2009. Retrieved 11 July 2011.
  3. "The Challenge and Status of The Maneri Bhali Stage-II Hydroelectric Project". Uttaranchal Jal Vidyut Nigam Limited. Archived from the original on 11 September 2011. Retrieved 12 July 2011.