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Salient Features

Project Details

River flow and discharge statistics of the project.

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Installed Capacity

7500 kW

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Province Number

Four

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District

Lamjung

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Project Location

Kwholasothar Rural Municipality

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Water Source

Midim Khola

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Type of Scheme

RoR

Hydrology

Key hydrological and discharge parameters of the project.

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River

Midim Khola

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Total Catchment Above Intakes

31.44 Km²

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Mean Annual Discharge

3.52 m³/sec

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100-Year Design Flood @ Intake

143.5 m³/sec

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Environmental Release

0.046 m³/sec

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Design Discharge to Plant Q40%

5.02 m³/sec

Headworks

Technical specifications of diversion, sluice, and intake structures.

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Diversion Structure

Boulder Lined Free Overflow Weir

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Length of Weir

15.30 m

height

Height of Weir

3.0 m

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Under Sluice

1 Vertical Sluice Gate

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Crest of Sluice EL

1836.75 mamsl

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Size of Sluice Gates (b x h)

2.0 m x 2.0 m

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Intake

Gated Side Orifice Intake with Course Trash Rack

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Size of Intake Gate

1.5 m × 1 m × 2 nos.

Connecting Canal

Structural and hydraulic details of the canal alignment.

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Type

Open Duct Type Canal

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Dimension (width x height)

1.25 m x 1.8 m

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Bed Slope

0.10%

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Length

31 m

Gravel Trap

Structural and sediment flushing details of the gravel trap.

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Type

Gravity Flushing Type

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Dimension (width x height)

3.90 m x 1.70 m

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Bed Slope

1:25

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Length of Gravel Trap

6.40 m

grain

Particle to Settle

5 mm

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Flushing Duct Size

0.5 m × 0.5 m

Desander

Hydraulic and sediment control specifications of the desander basin.

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Type

Two Chambers, Gravity Flushing Type

aspect_ratio

Dimension (width x height)

4.2 m x 4.47 m

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Length of Effective Basin

35.00 m

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Length of Inlet Transition

12.40 m

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Bed Slope

1:50

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Particle to Settle

0.2 mm

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Trap Efficiency

90%

Penstock Pipe

Structural and hydraulic details of the penstock alignment.

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Type

Surface, Mild Steel Circular Shaped

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Length

710 m (1.0 m Dia), 2050 m (0.9 m Dia), 921 m (0.8 m Dia), 24 m (0.6 m Dia)

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Pipe Material

Mild Steel Conforming to IS 2062-B Grade E250 & E350

aspect_ratio

Size of Pipe

1.0–0.6 m, 8–20 mm thickness

foundation

Supports

S/M Support with Concrete Cap

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Number of Supports

438 nos.

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Number of Anchor Blocks

57 nos. including bifurcation and thrust blocks

Power House

Structural and elevation details of the powerhouse building.

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Type

Surface with Outdoor Substation

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PH Dimension (L × B)

29.30 m × 16.5 m

height

Height of PH Building

13.50 m

stairs

PH Floor Level EL

1381.50 msl

Tailrace Canal

Structural and hydraulic details of the tailrace canal.

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Type

Rectangular RCC

aspect_ratio

Size (W × H)

1.26 m × 1.50 m

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Length

47.00 m

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Slope

1:500

Turbine

Mechanical and operational specifications of the turbine units.

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Number of Units

2

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Type of Turbine

Pelton (2 Units)

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Shaft Arrangement

Horizontal

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Rated Discharge

0.97 m³/s

height

Rated Head

436.22 m

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Rated Output

3745 kW

speed

RPM

750

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Rated Efficiency

91%

Generators

Electrical and operational specifications of the generators.

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Number of Units

2

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Generator Type

3 Ph AC Synchronous

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Excitation

Brushless Excitation

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Rated Voltage

6.6 kV

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Power Factor

0.85

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Rated Output

4412 kVA

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Rated Frequency

50 Hz

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Rated Efficiency

96%

Power Transformer

Electrical specifications and operational details of the transformer.

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Type

Step Up, 9500 kVA, 3 Ph, 50 Hz, ONAN Cooling

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Primary (LV Side)

6.6 kV

output

Secondary (HV Side)

33 kV

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Rated Efficiency

99%

Station Supply Transformer

Technical configuration and operational details of the station supply transformers.

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Type

Outdoor Type

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Capacity

200 kVA (Outdoor) & 160 kVA (Indoor), 2 nos.

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Voltage Ratio Indoor

6.6/0.4 kV

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Voltage Ratio Outdoor

6.6/11 kV

Transmission Line

Technical specifications of the power transmission infrastructure.

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Type of Circuit

Single Circuit 33kV Line, Mathillo Midim PH to Bhorletar Substation

route

Transmission Length

28 km

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Transmission Voltage

33 kV

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Interconnection Point

NEA 33 kV Busbar at Bhorletar Substation

Power and Energy

Technical overview of installed capacity and energy production.

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Installed Capacity

7.5 MW

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Contract Energy for PPA

42.1672 GWh

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Dry Season Energy

12.829 GWh

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Wet Season Energy

29.337 GWh