Projects

Upper Ingwa Khola Hydropower Project (9.7 MW)

Upper Ingwa Hydroelectric Project is a runoff the river type hydropower project situated at Ankhop VDC of Taplejung District of Province No. 1. The installed capacity of the project is 9.7 MW, and contract energy is 65.73 GWh. of which 24.9 GWh (37.88%) is the dry energy, and 40.83 GWh (62.12%) is the wet energy. The objective of this project is to generate electricity power and sell the energy to the national grid under a power purchase agreement signed between Nepal Electricity Authority (NEA) and the company. NEA is the sole government authority to purchase the power from this project. The power generated from this project shall be evacuated to the National Grid via Amarpur Substation under Mechi Corridor. This project will help to reduce load shedding in the Eastern Province-1 of Nepal. This is a Nepali currency denominated PPA project.

The Upper Ingwa Khola Hydroelectric Project is located on the Ingwa Khola, a tributary of the Kabeli river, in Taplejung district of Province 1 of Nepal. The project area lies just downstream of the confluence of the Phalame Khola and Ingwa Khola within the geographical coordinates of latitude: 27° 16' 46" N to 27° 17' 20" N, and longitude: 87° 52' 44" E to 87° 55' 20" E.

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Project Location
ProvinceEastern
DistrictsTaplejung & Panchthar
Head Works SiteYangruk & Sidingba VDC
Powerhouse SiteSidingba VDC
General Info
Name of RiverIngwa Khola
Type of SchemeRun of the River
Gross Head195.8 Meters
Rated Net Head186.92 Meter
Installed Capacity9.7 MW
Energy65.73 GWh
Dry Months Energy24.9 GWh (37.88%)
Wet Months Energy40.83 GWh (62.12%)
Hydrology
Catchment Area211 ㎢
Mean Annual Discharge12.0 m³/s
Design Discharge6.19 m³/s
1000 Years Flood797 m³/s
Head Works
Type of Diversion Structure211 ㎢
Length of Weir12.0 m³/s
Crest Level6.19 m³/s
Height of Overflow Weir797 m³/s
Number of Under sluice gates2
Type of GateVertical Gate
Size of Gate5m x 2m
Intake
TypeSide Intake
Size3.0m x 1.5m / 2 No.
Desalting Basin
TypeSurface type Hooper section
No. of Chamber2
Dimension (L x B x H)80m x 9.26m x 3m
Particle Size to be settled0.15mm
Head Race Pipe
TypeE 350 Mild steel
Length4500 meter
Diameter1.8m
Thickness10mm – 16mm
Penstock Pipe
TypeE 250 "O" Mild Steel
Length255 meter
Diameter1.8 - 1.2m
Thickness10mm – 16mm
Powerhouse
TypeSurface
Size (L x B x H)40m x 17.8m x 27.6m
Turbine Center Level940 m
Tailrace Canal
TypeRectangular, RCC
Length30m
Size (W x H)2.74m x 2.00m
Tail Water LevelEL.940 m
Turbine
TypeHorizontal Fransis
Number2
Rated Output Capacity per Unit5 MW
Efficiency92%
Generator
TypeSynchronous brushless,30 AC
Rated Output Capacity per Unit7 MW
Power Factor0.85
Voltage11 KV
Frequency50Hz
No. of UnitsTwo (2)
Efficiency97%
Transformer
TypeOutdoor, Oil Immersed
Rated Capacity18 MVA three phase
Voltage Ratio11/33 KV
Voltage11 KV
Efficiency99.00%
Transmission Line
Voltage Level33 KV Double Circuit
Length (approx.)16 km
FromPowerhouse
ToAmarpur Substation