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Puwa II Hydroelectric Project is a 4.96 MW run-of-river hydropower project being developed by People's Power Limited in Ilam District, Nepal. Located in the Sakhejung and Maipokhari areas of Ilam Municipality, the project benefits from excellent road connectivity, ensuring efficient construction and reliable long-term operation.
With an annual generation capacity of approximately 27.98 GWh of clean and renewable electricity, the project will contribute to meeting Nepal's increasing energy demand while promoting sustainable hydropower development.
Puwa II Hydroelectric Project demonstrates People's Power Limited's commitment to expanding the nation's renewable energy capacity and strengthening the national power system. Through the sustainable utilization of Nepal's abundant water resources, the project will enhance energy security, support economic growth, and contribute to a cleaner, greener, and more sustainable future.
Salient Features:
River | Puwa Khola |
Municipality | Ilam (Sakhejung & Mai Pokhari) |
District | Ilam |
Zone | Mechi |
Catchment Area | 63.9 Sq Km |
Design Discharge | 2.72 Cum/Sec. |
Marketable Annual Energy | 27.98 GWh |
Weir | |
Type of Weir | Ogee type |
Size of Weir | 2.3 m length x 1.7 m width |
Weir Crest Level | El. 1195 m |
Flood Discharge(1:100 yrs) | 348 cum/sec |
Headworks | |
Type of intake | Side intake |
Size of intake | 2.0mx0.8m |
Orifice Top level | El. 1195m |
Gravel Trap | |
Section | Rectangular |
Size(WxH) | 5m x 3.5 m |
Length | 8.00 m |
U/S Transition Length | 3.0 m |
Spillway Type | Overflow side spillway |
Spillway Length | 10.00 m |
Gravel Flushing Gate Size | 0.7 m x 0.7 m (1 number) |
Headrace Canal | |
Section | Rectangular covered concrete canal |
Size(WxH) | 1.7 m x 1.2 m |
Length | 270 m |
Hydraulic Slope | 1:500 |
Desanding Basin | |
Type | Dufour, Continuous/Intermittent flushing |
Size(LefxBxH) | 51.0 m x 8.0 m x 6.00 m |
Transition Length | 13.0 m |
Desanding Chambers | 2 no. |
Particle Size to be settled | 0.20 mm |
Flushing Gate Size | 1.0 m x 1.0 m (1 number) |
Back Transition | |
Type | Rectangular |
Size(LefxBxH) | 15.00 m x 8.00 m x 6.0 m |
Particle Size to be settled | less than 0.20 mm |
Flushing Gate Size | 0.7 m x 0.7 m (1 number) |
Capacity | 684.00 m3 (Volume for 3 minutes Generation) |
Penstock | |
Type | Exposed |
Material | Steel |
Length | 3800.00 m (uniform diameter) |
Diameter | 1.10 m |
Thickness | 8 mm to 22 mm |
Powerhouse | |
Type of Powerhouse | Surface |
Size (LxBxH) | 30.00 m x 15.00 m x 15.00 m (Roof ridge) |
Floor level | 947.40 m |
Minimum Tail water level | 949.5 m |
Turbine axis | 953.0 m |
Turbine | |
Type of Turbine | Pelton, Horizontal |
No. of Units | 2 |
Rated Net Head | 217-239m |
Unit Discharge | 1.36 cum/sec |
Axis | Horizontal |
Rated Speed | 600 rpm. |
Runaway Speed | 900 rpm. |
Generator | |
Type of Generator | Synchronous AC 3 phase |
Max Rated Capacity | 3000 KVA |
Rated Voltage | 6.6 KV |
Power Factor | 0.85 |
No of pole | 10 |
No of unit | 2 |
Frequency | 50Hz |
Excitation System | Brushless |
Efficiency | 96% |
Sub-station | |
Type | Outdoor |
Power Transformers | 6.6/33 kV, 3 phase |
Type | Oil immersed self-cooled outdoor type (ONAN) |
Rated Capacity | 3700 kVA |
Number of Units | 2 |
Frequency | 50 Hz |
Number of Phase | 3 phase |
Voltage Ratio | 6.6/33kvs |
Transmission Line | About 5 km long 33 kV single circuit ACSR Dog Conductor, connected to Upper Puwa I Sub Station ACSR Dog Conductor, connected to Upper Puwa I Substation |
Energy | |
Installed Capacity | 4,960 KW |
Annual Wet Energy | 19.57 GWh |
Annual Dry Energy | 8.41 GWh |
Total Annual Energy | 27.98 GWh |
Financial Indicators:
Total Project Cost (Including IDC) | 90 Crore |
Project Financing (Debt/Equity Ratio) | 2:1 |
Debt Interest Rate | 10% |
Internal Rate of Return (IRR) | 14.07% |
Benefit/Cost Ratio (B/C Ratio) | 1.16 |
Project Payback Period | 12 years |
Gallery
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