48Gwh/yr

Energy Generation

6.2MW

Installed Capacity

About

The Puwa Khola Hydropower Station is a run-of-river project located in Ilam District, Koshi Province, Nepal, harnessing the flow of the Puwa Khola, a tributary of the Mai Khola River. Commissioned on April 4, 2004 (2060-12-22 BS), it has an installed capacity of 6.2 MW generated by two horizontal-axis Pelton turbines rated at approximately 3.1 MW each. The plant operates with a gross and net head of roughly 304 meters and an average design flow of 2.5 m³/s. Water is diverted via a gravity weir into a 3.2 km long headrace tunnel, feeding a steel-lined penstock of 990 meters that supplies the surface powerhouse. Electricity is stepped up from 6.6 kV to 33 kV for transmission over a 5 km single-circuit line. Owned and operated by the Nepal Electricity Authority (NEA), the plant contributes to Nepal's hydropower capacity and has a generation license valid until 2101 BS. The annual design energy generation is approximately 48 GWh.

Salient Features

Hydrology ( Intake )

Catchment Area 125.1 km2
Maximum Net Head 304m
Average Annual Discharge 2.5 m3/s
Live Storage Volume 2057m3

Head Works (Intake)

Diversion Length 30.4m Crest Length

Turbine

Type Horizontal Pelton
Number of Units 2
Rated Discharge 1.25 m3/s
Rated Output 3.3 MW

Generators

Rated Capacity 3.7 MVA
Power Factor 0.85

Transformers

Number of Units 1 (8 MVA, 6.6/33 kV, 3 Phase)
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Application for Survey License

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Survey License Approved

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Application for Generation License

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Under Construction

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Live

Location