Salient features
|
Project Location |
|
|
Province |
Bagmati |
|
District |
Rasuwa |
|
Headworks |
Uttargaya Rural Municipality ward no. 1, Rare |
|
Powerhouse |
Uttargaya Rural Municipality ward no. 1, Gyangsilung |
|
Geographical Co-ordinates |
|
|
Latitude |
28º 05’53” N to 28º08’00” N |
|
Longitude |
85º11’00” E to 85º13’00” E |
|
General |
|
|
Name of river |
Mailung |
|
Nearest Town |
Trishuli Bajar |
|
Operation Type |
Based on river flow |
|
Gross head |
495 m |
|
Connected Capacity |
14.3 MW |
|
Average annual energy |
79.67 GW Hour |
|
Hydrology |
|
|
Watershed area |
72 km |
|
Average water flow |
4.17 cubic meter per sec |
|
Estimated flow |
3.53 cubic meter per sec (Q40) |
|
Environmental flow |
0.06 cubic meter per sec |
|
Design flood (1:100 years) |
112 cubic meter per sec |
|
Diversion weir |
|
|
Weir type |
Boulder lined weir |
|
Length |
20 m |
|
Height |
2.5 m |
|
Crest elevation |
2049 m |
|
Intake |
Bottom intake/side intake |
|
Size of bottom intake |
1.2 m (width) × 1.5 m (length) |
|
Approach culvert/tunnel |
|
|
Type |
RCC rectangular |
|
Length |
25.86 m (with gravel trap) |
|
Measurement |
2.0 m × 1.5 m |
|
Settling basin |
|
|
Type |
Hopper type, Conventional Flushing |
|
Number of chamber |
2 |
|
Measurement of the structure (L×B×H) |
55 m × 5.5 m × 4.5 m |
|
Headrace Tunnel |
|
|
Type |
Free flow, Inverted D-shaped |
|
Length |
1736 m |
|
Diameter |
2.4 m |
|
Forebay |
|
|
Type |
Rectangular, Concrete |
|
Measurement of structure (L×B×H) |
15 m × 6 m × 9 m |
|
Penstock Pipe |
|
|
Type |
Steel pipe (supported) |
|
Length |
1172.5 m |
|
Diameter |
1.2 m |
|
Thickness |
6-36 mm;45 and 80 mm (for reducer) |
|
Powerhouse |
|
|
Type |
Surface |
|
Measurement of structure (L×B×H) |
28.7 m × 10.8 m × 13.5 m |
|
Surface of the ground (Turbine Center Level) |
1553.5 m amsl |
|
Tailrace canal |
|
|
Type |
Rectangular, Box Culvert |
|
Measurement of structure (L×B×H) |
35 m × 1.2 m × 1.5 m |
|
Turbine |
|
|
Type |
Horizontal Axis Pelton |
|
Number |
2 |
|
Capacity per turbine |
7500 KW |
|
Efficiency |
89% |
|
Switchyard |
|
|
Type |
GIS |
|
Governor |
|
|
Type |
Electro-hydraulic with PID |
|
Generator |
|
|
Type |
Synchronous, three phase |
|
Capacity |
8425 × 2 kVA |
|
Power factor |
0.85 |
|
Voltage |
11 kV |
|
Frequency |
50 Hz |
|
Number |
2 |
|
Excitation System |
Brushless |
|
Efficiency |
95.5% |
|
Transformer |
|
|
Type |
Three phase, oil immersed |
|
Capacity |
8400 kVA × 2 |
|
Voltage ratio |
132/11 kV |
|
Efficiency |
99% |
|
Transmission system |
|
|
Voltage |
132 kV |
|
Length |
11 km |
|
Starting point |
Powerhouse |
|
End point |
Trishuli 3B Hub substation |
|
Conductor |
BEAR |
- In Operation