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HYDRO POWER

Projects - Himachal Pradesh

Miyar Hydro Electric
Project Capacity - 120 MW
Seli Hydro Electric Project
Project Capacity - 400 MW

 

 

Miyar Hydro Electric Project

Project Capacity - 120 MW

The project envisages an installation of 120 MW capacity and has been awarded to Moser Baer through the international competitive bidding process. The project component comprises of a construction of a 25 m high diversion structure, about 6.6 km long headrace tunnel, an open to sky restricted orifice surge tank, a surface powerhouse complex on the right bank of river Chenab near Udaipur town. Power would be generated by harnessing 215.54 m of rated head between intake and tail race outfall location.

 

Status/ Progress/ Development
  • TOR from MoEF for carrying out Pre- Construction activities has been obtained.
  • Survey and investigation completed.
  • Site office is operational.
  • Automatic Weather Station is running and real time data on various weather parameters being observed.
  • On-site hydrological observation.
  • Hydrological Study approved by CWC/CEA.
  • Power Potential Study approved by CEA.
  • TEC granted by CEA on 07th February 2013.
  • Environment Clearance Granted by MOEF, Stage-1 Forest Clearance granted by MOEF.
  • Acquisition of private land is in progress.
  • Grant of Connectivity is issued by PGCIL.
  • CSR programme continuing
  • Voluntary plantation programme continuing
Project Location

Miyar Hydroelectric Project is located in District Lahaul and Spiti, Himachal Pradesh on the Miyar Nallah which is a major tributary of Chenab River.

Project Objectives
The Project shall provide:
  • Peaking power
  • Renewable energy which helps reduce carbon emissions.
  • Development of remote area.
  • Sustainable business and lowering cost of generation of electricity.
Project Strengths
  • Location Advantage
      • Embedded in the deficit Northern Grid resulting in minimal losses in transmitting to delivery point in the Northern Region Grid.
      • Project alignment along the existing road which will reduce construction of any extensive intra-site roads.
      • Easily accessible for quick commencement of project development and construction.
Others:
  • Low population density.
  • No displacement.
Salient features of Miyar HEP (120 MW)
Project Location
State : Himachal Pradesh
District : Lahaul & Spiti
River : Miyar

Vicinity

:

Udaipur Village

Pondage
Catchment area : 901 Km2
Snow fed catchment area : 601Km2
Full reservoir level (FRL) : 2845.00 m a.s.l.

Minimum drawdown level (MDDL)

:

2837.23 m a.s.l.

Barrage
Crest length of Barrage : 91 m

Height of Barrage (above sill level)

:

27 m

River Division

Diversion Tunnel Length, Diameter

:

232.5 m, 6.5 m D-Shaped

Tunnel Intake

Location

:

Left Bank

Headrace Tunnel
Finished Shape : Circular
Length : 6643.0 m

Finished Diameter

:

4.7 m

Surge Shaft
Type & Number : Open to sky, 1 no.

Shaft Dia

:

10 m

Pressure Tunnel / Pens Tock

Type & Number

:

1 no, steel lined, 3.6 m dia

Power House
Capacity : 3 x 40 MW
Type : Surface
Size L X W : 85.5 x 17 m
Average Gross Head : 231.81 m
Turbine type & no : Francis, 3 nos.
Design Discharge : 61.35 cumecs
Rated Head : 215.54 m
Inlet valve type : Spherical, 1.6 m dia

Generator type & no.

:

3 phase, 3 nos.

Transformer Deck
Transformer type & no : 3 phase, 3 nos, 50 MVA each

Location

:

Outdoor

Tail Race Channel

Type & Number

:

Surface, One

 

 

Seli Hydro Electric Project

Project Capacity - 400 MW

The project envisages an installation of 400 MW capacity and has been awarded to Moser Baer through the international competitive bidding process. The project component comprises of a concrete gravity dam of about 80 metre height above river bed level with two headrace tunnel of approximately 4.2 km and an underground powerhouse complex on the right bank of river Chenab. Power would be generated by harnessing 114.92 m average gross head between intake and tail race location.

 

Status/ Progress/ Development
  • TOR from MoEF for carrying out Pre- Construction activities is in place.
  • Survey and investigation completed.
  • Site office is operational.
  • Automatic Weather Station is running and real time data on various weather parameters being observed.
  • On-site hydrological observation.
  • Hydrological Study approved by CWC/CEA.
  • Power Potential Study approved by CEA.
  • DPR under examination in CEA.
  • Public hearing held successfully.
  • Project has been recommended for final Environment Clearance by EAC.
  • Diversion of forest land is in progress
  • Acquisition of private land is in progress.
  • The power shall be evacuated through 400 kV ISTS by CTU.
  • The Project has been granted the connectivity by CTU.
  • Various CSR activities like voluntary plantation of trees, opening library in project area continuing.
Project Location

Seli Hydroelectric Project is located in District Lahaul and Spiti, Himachal Pradesh on the Chenab River.

Project Objectives
The Project shall provide:
  • Peaking power
  • Renewable energy which helps reduce carbon emissions.
  • Development of remote areas in higher reaches.
  • Sustainable business and lowering cost of generation of electricity.
Project Strengths
  • Location Advantage:
      • Embedded in the deficit Northern Grid resulting in minimal losses in transmitting to delivery point in the Northern Region Grid.
      • Project alignment along the existing road which will reduce construction of any extensive intra-site roads.
      • Easily accessible for quick commencement of project development and construction.
Others:
  • Low population density.
  • No displacement.
Salient features of Seli HEP (400 MW)
Project Location
State : Himachal Pradesh
District : Lahaul & Spiti
River : Chenab River
Vicinity : Shulling Village, Udaipur Town

Scheme

:

Run-of-River

Reservoir
Catchment area : 6033 Km2
Snow fed catchment area : 3787 Km2
Full reservoir level (FRL) : 2606.00 m a.s.l.
Minimum drawdown level (MDDL) : 2602.17 m a.s.l.

Tail Water Level

:

2487.1 m

Dam
Type : Concrete Gravity
Crest Length of the Dam : 189.5 m

Height of Dam (From Riverbed Level)

:

80.00 m

Spillway

Type

:

Overflow Ogee, 6 nos. Radial gates

River Diversion
Twin Diversion Tunnels : 9.0 m Diameter

Diversion Tunnel Length (of Each)

:

738m and 593 m

Power Intake

Bank

:

Right

Headrace Tunnel (Two Nos.)
Finished Shape : Circular
Finished Diameter : 8.4 m
Length of HRT 1 : 4168 m

Length of HRT 2

:

4253 m

Adits To HRT
Number of Adits   1
Type & Size : D-Shape, 7 m

Length of Adit

:

435 m

Surge Shaft
Type & Number : Underground, 2 nos.

Shaft Dia

:

29.0 m

Pressure Shaft

Type & Number

:

Steel lined 4.6 m dia, 4 nos.

Powerhouse
Capacity : 4 x 100 MW
Type : Underground
River Bank   Right Bank
Size (L x W x H) : 121 x 20 x 36.4 m
Average Gross Head : 114.92 m
Turbine type & nos. : Vertical Francis, 4 nos.
Design Discharge : 404.64 cumec
Rated Head : 108.35 m
Inlet valve type : Butterfly, 4.1 m dia

Generator type

:

Single Phase 4 nos

Transformer Cavern
Type : Underground, GIS system

Transformer Type

:

Single Phase, 41 MVA each

Trail Race Tunnel
Type & Number : Underground, Four

Diameter

:

5.95 m

Power Benefits

Energy  in 90% dependable year

:

1474.03 GWh