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Project Details

1

 

Location

 

 

i)

State

Himachal Pradesh.

 

ii)

District

Shimla

 

iii)

River

Pabbar River.

 

iv)

Village

Paudital-Lassa

 

v)

Nearest Airport

Shimla Airport.

 

vi)

Nearest Railway station

NG-Kalka

 

vii)

Nearest capital cities (Across Road)

Shimla, Theog, Rohru

 

viii)

Diversion Barrage

 

 

 

a) Longitude

E 77º 43’ 0”

 

 

b) Latitude

N 31º 07’30”

2

 

Purpose of the Project

Generation and Transmission of Hydro Electric Power.

3

 

Installed Capacity

3 x 8000 kW

4

 

Annual Energy Generation in Mu in 75%Dependable year

134.95 GWHr

5

 

Hydrology

 

 

i)

Catchment Area

900.00 Sq km

 

ii)

Design Power Discharge

13.55 cumecs / Unit, at rated head

 

iii)

Maximum Power Discharge

16.93 cumecs / Unit

 

iv)

Design Flood

3000 cumecs

6

 

Diversion Structure

 

 

i)

Location

Across Pabbar River near Paudital village.

 

ii)

Type

Trench Weir

 

iii)

FRL

EL 1492.50m

 

iv)

Deepest Foundation level

EL 1482.15 m

 

v)

Deepest River bed level

EL 1490.00 m

 

vi)

Height of the Trench Weir at deepest bed level

10.85 m

 

vii)

Length of Weir

104.00 m

 

viii)

Flood discharge capacity

3000 cumecs

 

ix)

Gate

 

 

 

(a) Service Gate

 

 

 

Nos.

1

 

 

Size

5.00 m x 4.0 m

 

 

Hoist

Rope Drum Hoist

7

 

Intake

 

 

i)

No

1

 

ii)

Sill Level

EL.1484.20 m

 

iii)

Hoist Bridge Level

EL.1502.00 m

 

iv)

Design Discharge for three units including flushing

61.00 cumecs

 

v)

Gates

 

 

 

a) Service Gate

 

 

 

Nos.

2

 

 

Size

3.0 m x 4.1 m

 

 

Type

Vertical lift roller Gate

 

 

Hoist

Rope Drum Hoist

8

 

Power Channel (from CH :24.57 m to 41.57)

 

 

i)

Length of Channel

17.00 m

 

ii)

Size of Channel

7.5 x 11.60 m

 

iii)

Bed gradient of channel

1 : 2500

9

 

Power Channel (from CH :177.59 m to 184.93)

 

 

i)

Length of Channel

7.34 m

 

ii)

Size of Channel

7.5 x 11.60 m

 

iii)

Bed gradient of channel

1 : 2500

10

 

Desander

 

 

i)

Length of Desander including transition, inlet and outlet and gates.

136.00 m

 

ii)

Width of gated structure

7.5 m

 

iii)

Width of each bay

10.0 m

 

iv)

Total width of Desander including bifurcation wall

23.00 m

 

v)

No. of bays

2

 

vi)

Sill level of inlet gate

EL 1488.39 m

 

vii)

Sill level at exit gate

EL 1488.35 m

 

viii)

Top level at Desander

EL 1500.00 m

 

ix)

Size of inlet gates

3.25 m x 4.10 m

 

x)

Type

Vertical lift roller Gate

 

xi)

Hoist

Rope Drum Hoist

 

xii)

Size of outlet gates

3.25 m x 4.14 m

 

xiii)

Type

Vertical lift roller Gate

 

xiv)

Hoist

Rope Drum Hoist

 

xv)

Sill level at inlet of Flushing Duct

EL.1482.98 m

 

xvi)

Sill level at outlet of Flushing Duct

EL.1481.84 m

11

 

Head Race Tunnel

 

 

i)

Diameter of Tunnel

5.0 m

 

ii)

Shape of Tunnel

Horse Shoe shape

 

iii)

Lining thickness

0.25m

 

iv)

Length of the Tunnel

5752.00 m

 

v)

Design Discharge

50.81 Cumecs

12

 

Adits

 

 

 

Total No. of Adits

2

 

 

Adit 1

 

 

i)

Length of the Adit

296.40 m

 

ii)

Dia of Adit

4.0 m “D” shaped

 

 

Adit 2

 

 

i)

Length of the Adit

282.00 m

 

ii)

Dia. of Adit

4.0 m “D” shaped

13

 

Surge Shaft

 

 

i)

Diameter of Surge Shaft

15.0 m

 

ii)

Invert level

1453.33 m

 

iii)

Sill level at inlet

1454.90 m

 

iv)

Top Level

EL.1507.00 m

 

v)

Maximum Surge Level

EL.1506.00 m

 

vi)

Minimum Surge Level

EL.1462.00 m

 

vii)

Height of the Surge shaft

53.67 m

 

viii)

Type of Construction

RCC lined

14

 

Main Penstock

 

 

i)

Type

Tunnel penstock

 

ii)

Shape

Circular

 

iii)

Diameter

5.0m dia for a length of 72.9 m

 

iv)

Surface Penstock

4.0m dia for a length of 55.86 m

 

v)

Flow

Pressure Flow.

15

 

Power House

 

 

i)

Location

Left bank of Pabbar River.

 

ii)

Type

Surface

 

iii)

Size of Power house (including Service Bay)

21.50 m x 40.10 m

 

iv)

Size of Service Bay

21.50 m x 10.00m

 

v)

Size of Unit Bay

15.00 m X 30.10 m

 

vi)

Size of Control room / Switch gear room.

6.50 m x 30.10 m

 

vii)

No. of Bays

3 unit bays and one Service bay

 

viii)

Capacity

3 Units of 8000 kW each

 

ix)

El. Of Turbine C/L

El 1417.20 m

 

x)

Generator Floor Level

El 1419.80 m

 

xi)

Control Room Floor Level

El 1427.50 m

 

xii)

Service/Equipment handling Bay Level

El 1427.50 m

 

xiii)

Draft Tube floor Level

El 1412.77 m

 

 

a) Draft Tube Gates

 

 

 

No. of gates

3 Nos.

 

 

Size of gates

5.00 m x 2.00m

 

 

Type

Vertical lift Gate

 

 

Hoisting Arrangement

Moving Gantry Crane.

16

 

Tail Race Pool

 

 

i)

Length

23.12 m

 

ii)

High Flood Level

EL 1426.50

 

iii)

Bed width

Varing from 29.63m to 25.00m.

 

iv)

Design discharge

50.81 Cumecs

 

v)

Bed Slope

1 in 4

 

vi)

Bed Levels

Varying from EL 1412.77m to

EL 1418.55m.

17

 

Tail Race Channel

 

 

i)

Length

600.00 m

 

ii)

Bed Width

25.00 m

 

iii)

Type

Unlined, Regraded

 

iv)

Longitudinal slope

1 in 1000

 

v)

Bed Levels

Varying from EL 1418.55m to

EL 1417.95.

18

 

Turbines

 

 

i)

Type

Vertical Francis Turbine

 

ii)

Rated Capacity of the turbine

8333 kW

 

iii)

Maximum Net Head

73.83m

 

iv)

Minimum Net Head

66.83 m

 

v)

Rated Head

68.41 m

 

vi)

Rated Discharge Per unit

13.55 Cumecs

 

vii)

Rated Speed

375 rpm

 

viii)

Runner Dia.

1500 mm

 

ix)

Efficiency

92 %

19

 

Generators

 

 

i)

Type

Synchronous Generator

 

ii)

Rated Output

8000 kW

 

iii)

Generation Voltage

11kV

 

iv)

Rated Speed

375 rpm

 

v)

Efficiency - Generator

96%

20

 

Transmission Lines

 

 

i)

Length

12 km

 

ii)

Terminal Point

66/22 kV HPSEB at Rohru

 

iii)

Type

66 kV Double Circuit

21

 

Out Door Yard

 

 

i)

Size

46.00 m x 29.00 m

 

ii)

No. of Power Transformers

3

1

 

Location

 

 

i)

State

Himachal Pradesh.

 

ii)

District

Shimla

 

iii)

River

Pabbar River.

 

iv)

Village

Paudital-Lassa

 

v)

Nearest Airport

Shimla Airport.

 

vi)

Nearest Railway station

NG-Kalka

 

vii)

Nearest capital cities (Across Road)

Shimla, Theog, Rohru

 

viii)

Diversion Barrage

 

 

 

a) Longitude

E 77º 43’ 0”

 

 

b) Latitude

N 31º 07’30”

2

 

Purpose of the Project

Generation and Transmission of Hydro Electric Power.

3

 

Installed Capacity

3 x 8000 kW

4

 

Annual Energy Generation in Mu in 75%Dependable year

134.95 GWHr

5

 

Hydrology

 

 

i)

Catchment Area

900.00 Sq km

 

ii)

Design Power Discharge

13.55 cumecs / Unit, at rated head

 

iii)

Maximum Power Discharge

16.93 cumecs / Unit

 

iv)

Design Flood

3000 cumecs

6

 

Diversion Structure

 

 

i)

Location

Across Pabbar River near Paudital village.

 

ii)

Type

Trench Weir

 

iii)

FRL

EL 1492.50m

 

iv)

Deepest Foundation level

EL 1482.15 m

 

v)

Deepest River bed level

EL 1490.00 m

 

vi)

Height of the Trench Weir at deepest bed level

10.85 m

 

vii)

Length of Weir

104.00 m

 

viii)

Flood discharge capacity

3000 cumecs

 

ix)

Gate

 

 

 

(a) Service Gate

 

 

 

Nos.

1

 

 

Size

5.00 m x 4.0 m

 

 

Hoist

Rope Drum Hoist

7

 

Intake

 

 

i)

No

1

 

ii)

Sill Level

EL.1484.20 m

 

iii)

Hoist Bridge Level

EL.1502.00 m

 

iv)

Design Discharge for three units including flushing

61.00 cumecs

 

v)

Gates

 

 

 

a) Service Gate

 

 

 

Nos.

2

 

 

Size

3.0 m x 4.1 m

 

 

Type

Vertical lift roller Gate

 

 

Hoist

Rope Drum Hoist

8

 

Power Channel (from CH :24.57 m to 41.57)

 

 

i)

Length of Channel

17.00 m

 

ii)

Size of Channel

7.5 x 11.60 m

 

iii)

Bed gradient of channel

1 : 2500

9

 

Power Channel (from CH :177.59 m to 184.93)

 

 

i)

Length of Channel

7.34 m

 

ii)

Size of Channel

7.5 x 11.60 m

 

iii)

Bed gradient of channel

1 : 2500

10

 

Desander

 

 

i)

Length of Desander including transition, inlet and outlet and gates.

136.00 m

 

ii)

Width of gated structure

7.5 m

 

iii)

Width of each bay

10.0 m

 

iv)

Total width of Desander including bifurcation wall

23.00 m

 

v)

No. of bays

2

 

vi)

Sill level of inlet gate

EL 1488.39 m

 

vii)

Sill level at exit gate

EL 1488.35 m

 

viii)

Top level at Desander

EL 1500.00 m

 

ix)

Size of inlet gates

3.25 m x 4.10 m

 

x)

Type

Vertical lift roller Gate

 

xi)

Hoist

Rope Drum Hoist

 

xii)

Size of outlet gates

3.25 m x 4.14 m

 

xiii)

Type

Vertical lift roller Gate

 

xiv)

Hoist

Rope Drum Hoist

 

xv)

Sill level at inlet of Flushing Duct

EL.1482.98 m

 

xvi)

Sill level at outlet of Flushing Duct

EL.1481.84 m

11

 

Head Race Tunnel

 

 

i)

Diameter of Tunnel

5.0 m

 

ii)

Shape of Tunnel

Horse Shoe shape

 

iii)

Lining thickness

0.25m

 

iv)

Length of the Tunnel

5752.00 m

 

v)

Design Discharge

50.81 Cumecs

12

 

Adits

 

 

 

Total No. of Adits

2

 

 

Adit 1

 

 

i)

Length of the Adit

296.40 m

 

ii)

Dia of Adit

4.0 m “D” shaped

 

 

Adit 2

 

 

i)

Length of the Adit

282.00 m

 

ii)

Dia. of Adit

4.0 m “D” shaped

13

 

Surge Shaft

 

 

i)

Diameter of Surge Shaft

15.0 m

 

ii)

Invert level

1453.33 m

 

iii)

Sill level at inlet

1454.90 m

 

iv)

Top Level

EL.1507.00 m

 

v)

Maximum Surge Level

EL.1506.00 m

 

vi)

Minimum Surge Level

EL.1462.00 m

 

vii)

Height of the Surge shaft

53.67 m

 

viii)

Type of Construction

RCC lined

14

 

Main Penstock

 

 

i)

Type

Tunnel penstock

 

ii)

Shape

Circular

 

iii)

Diameter

5.0m dia for a length of 72.9 m

 

iv)

Surface Penstock

4.0m dia for a length of 55.86 m

 

v)

Flow

Pressure Flow.

15

 

Power House

 

 

i)

Location

Left bank of Pabbar River.

 

ii)

Type

Surface

 

iii)

Size of Power house (including Service Bay)

21.50 m x 40.10 m

 

iv)

Size of Service Bay

21.50 m x 10.00m

 

v)

Size of Unit Bay

15.00 m X 30.10 m

 

vi)

Size of Control room / Switch gear room.

6.50 m x 30.10 m

 

vii)

No. of Bays

3 unit bays and one Service bay

 

viii)

Capacity

3 Units of 8000 kW each

 

ix)

El. Of Turbine C/L

El 1417.20 m

 

x)

Generator Floor Level

El 1419.80 m

 

xi)

Control Room Floor Level

El 1427.50 m

 

xii)

Service/Equipment handling Bay Level

El 1427.50 m

 

xiii)

Draft Tube floor Level

El 1412.77 m

 

 

a) Draft Tube Gates

 

 

 

No. of gates

3 Nos.

 

 

Size of gates

5.00 m x 2.00m

 

 

Type

Vertical lift Gate

 

 

Hoisting Arrangement

Moving Gantry Crane.

16

 

Tail Race Pool

 

 

i)

Length

23.12 m

 

ii)

High Flood Level

EL 1426.50

 

iii)

Bed width

Varing from 29.63m to 25.00m.

 

iv)

Design discharge

50.81 Cumecs

 

v)

Bed Slope

1 in 4

 

vi)

Bed Levels

Varying from EL 1412.77m to

EL 1418.55m.

17

 

Tail Race Channel

 

 

i)

Length

600.00 m

 

ii)

Bed Width

25.00 m

 

iii)

Type

Unlined, Regraded

 

iv)

Longitudinal slope

1 in 1000

 

v)

Bed Levels

Varying from EL 1418.55m to

EL 1417.95.

18

 

Turbines

 

 

i)

Type

Vertical Francis Turbine

 

ii)

Rated Capacity of the turbine

8333 kW

 

iii)

Maximum Net Head

73.83m

 

iv)

Minimum Net Head

66.83 m

 

v)

Rated Head

68.41 m

 

vi)

Rated Discharge Per unit

13.55 Cumecs

 

vii)

Rated Speed

375 rpm

 

viii)

Runner Dia.

1500 mm

 

ix)

Efficiency

92 %

19

 

Generators

 

 

i)

Type

Synchronous Generator

 

ii)

Rated Output

8000 kW