Uttaranchal Jal Vidyut Nigam Limited (UJVNL) with it's headquarter at Dehradun in the state of Uttaranchal (India) is operating, maintaining & constructing Hydro Power Plants.

 Dehradun is the capital of the state of Uttaranchal and is approximately 300 km far in northern direction from New Delhi closed to the Himalayan Mountains and well-connected through road, rail & air. The main concern in this project is the rehabilitation of the following 5 power stations below.

Chibro with Ichari Dam Khodri Dhakrani Dhalipur Kulhal

In this project was an assessment of the current physical condition of all of the 5 plants, which includes a survey of the project area and an inspection of all plant equipment, collection of data, records and statistics referring to the operation of the plants related to the I&C system. Furthermore, develop preliminary feasible options for modernization and upgrading and a state of the art control concept for all of the 6 power stations.

 

TONS RIVER VALLEY POWER STATIONS

Chibro & Khodri Power Stations utilize the water of river Tons. Tons river is an important tributary of the Yamuna River. This river joins Yamuna at Kalsi in the Northwestern part of Dehradun valley, which is approximately 50 km. away from Dehradun. A diversion dam across the river Tons has been constructed at Ichari with a 6.2 km long headrace tunnel from the diversion dam to Chibro under ground power station. Ichari is approximately 100 km from Dehradun in the hilly terrain.

Tons river upstream from Ichari dam Ichari dam on Tons river Tons river downstream

CHIBRO POWER STATION

Chibro power station is an underground power station built on the left bank of river Tons nearly 25 km downstream of Ichari dam and 75 km from Dehradun and it surrounded by hills. The power station is located at 33° 33' 23" N & 077° 47'50" E. The power station was commissioned in 1975.

The power station consists of four generating units each having a capacity of 60 MW. The total installed electrical capacity is 240 MW.

The main power station equipments including turbine, generator and power transformer had been supplied by M/s Bharat Heavy Electrical Ltd. Bhopal.

The turbines are Vertical shaft Francis turbines. Each unit has its own penstock  with a butterfly valve. The power station is provided with a unit system of layout, where each generator is directly connected to a power transformer.

For the outdoor switchyard, 220 kV oil filled cables coming from transformers situated in powerhouse. The Switchyard is connected through two 220 kV outgoing feeders to Khodri. 

220 kV Switchyard Central Control Room  Cavern with Control Room

KHODRI POWER STATION

The tail water collection gallery of Chibro power house supplies water to the power Tunnel of Khodri Power House by means of a siphon across river Tons.

Khodri power station is a 4x30 MW surface power station built on right bank of river Yamuna and is nearly 50 km from Dehradun.

The power station is located at 30° 30' 30" N & 077° 47'58" E closed to the barrage across river Yamuna at Dakpathar. The power station was commissioned in 1984.

The headrace tunnel system consider a 7.5 m in diameter concrete lined circular tunnel with 4628 m length and three tunnels of smaller diameter in remaining length.

The total length of the tunnel system is 5.6 km. The tailrace is a short open channel connecting to river Yamuna.

The power station consists of four generating units each having a capacity of 30 MW. The total installed electrical capacity is 120 MW. The main power station equipments including turbine, generator and power transformer had been supplied by M/s Bharat Heavy Electrical Ltd. Bhopal. The turbines are Vertical shaft Francis turbines. 

220 kV Switchyard Turbine Hall Central Control Room

YAMUNA RIVER VALLEY

River Yamuna originates from the Himalayas and is joined by its major tributary the Tons at Kalsi, approximately 50 Km from Dehradun. The Yamuna river collect the water from an elaborate web of water channels all across North India. These tributaries of Yamuna are the main source of water in Northern India. A barrage across river Yamuna at Dakpathar 3 Km downstream of Kalsi has been constructed. 14 Km power channel takes of at the Dakpathar barrage having its outfall into the river Asan, immediately upstream of the junction of Asan and Yamuna rivers.

Dhakrani & Dhalipur are the two power stations along this power channel with a total installed capacity of 84.75 MW. Another power channel takes of at Asan barrage having its outfall into the river Yamuna near Paonta Sahib. Kulhal power station with a capacity of 3x10 MW is running along this power channel.

Yamuna River Valley Downstream Dakpathar Barrage Yamuna River Valley Upstream

DHAKRANI POWER STATION

Dhakrani power station is a 3x11.25 MW surface power station located at a distance of approximately 40 km from Dehradun. It is built on the power channel emanating from Dakpathar Barrage & is approximately 7 Km from Dakpathar Barrage.

The power station is located at 30° 27' 25" N & 077° 44'13" E. The commissioning for 2 units was in 1965 and the last unit was commissioned in 1970.

Dhakrani is the first of two power stations (Dhalipur is following) running in  cascade and using the same power channel down stream from Dakpathar.

The power station consists of three generating units each having a capacity of 11.25 MW. The total installed electrical capacity is 33.75 MW.

The main power station equipments including turbine and generator had been supplied by M/s Litostroj, Yugoslavia. The turbines are Vertical shaft Kaplan turbines.

Water Intake Gates Turbine Hall Central Control Room

DHALIPUR POWER STATION

 

Dhalipur is a 3x17 MW surface power station built down stream of Dhakrani power station, which is 7 km from Dhakrani and about 12 km down stream of Dakpathar barrage.

The power station is located at 30° 27' 22" N & 077° 44'1" E. This power station utilizes the discharge of Tons and Yamuna Rivers through a 12 km long channel. The commissioning for the three units started in 1965, 1966 and finnished in1970.

The total installed electrical capacity is 51 MW. The designed head is 30.5 meter with a maximum discharge of 200 cubic meter. The main turbine equipment for the power station was supplied by M/s Litostroj, Yugoslavia and main electric equipment by M/s Rade Koncar, Yugoslavia through M/s Ingra Zegreb.

The transformers were supplied by M/s Heavy Electrical (India) Ltd. Bhopal having 20 MVA capacity each. The turbines are Vertical shaft Francis turbines.

Bypass Channel Turbine Hall Central Control Room

KULHAL POWER STATION

Kulhal is a 3x10 MW surface power station built down stream of Dhalipur power station and is 5 km from Asan Barrage. The power station is located at 30° 25' 42" N & 77° 37'49" E.

It is situated on left bank of river Yamuna, opposite Paonta Saheb town of Himachal Pradesh and is about 4.5 Km downstream of Asan Barrage and about 50 Km from the nearest Railhead, Dehradun.

This surface power station utilizes the discharge of Tons, Yamuna and Asan River through a 4.5 Km long power channel. The commissioning of the units was in 1975.

The total installed electrical capacity is 30 MW with a head of 18 meters. M/s BHEL, Hardwar, supplied the main turbine & electrical equipments of this power station.

The Power Transformers, each of 12.5 MVA capacity were supplied by M/s Transformers and Electricals Ltd., Kerala (India). The turbines are Vertical shaft Kaplan turbines. 

Bypass Channel Turbine Hall Central Control Room