INTRODUCTION
Kaligandaki hydropower project is
the largest hydropower plant in Nepal with its installed capacity of 144 mw. It
is located in syanja district of Nepal which is about 300 km west from the
capital Kathmandu. In this power plant flow rate of water is seen to be much higher
in comparison with the net head hence the turbine appropriate was reaction type
and used turbine was Francis turbine. Dam was constructed near the junction of
two big rivers aadhi khola and Kaligandaki River.
This power plant is run off river hydropower plant with reservoir as an added advantage. The depth of reservoir was about 24 meters which fluctuates on the basis of amount of water available. The water was the guided through the sluice gate to the cannel having diameter of 7.4 meter. Three vertical Francis turbines each having capacity of 48 mw is located in power house but only two of them were functional.
This power plant is run off river hydropower plant with reservoir as an added advantage. The depth of reservoir was about 24 meters which fluctuates on the basis of amount of water available. The water was the guided through the sluice gate to the cannel having diameter of 7.4 meter. Three vertical Francis turbines each having capacity of 48 mw is located in power house but only two of them were functional.
Technical data about Kaligandaki hydropower plant:
Dams and desanding
facilities
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Reservoir area:
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7618 m^2
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Average annual inflow:
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288 m^3/s
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Reservoir level(operating maximum):
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EL 524 m
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Reservoir level (operating minimum):
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EL 518 m
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Reservoir volume at maximum operating:
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7700000 m^3
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Spillway(type):
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gated
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No. and type of gate:
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Radial gates(15m*19m)
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Power water ways
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Tunnel :
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Concrete lined pressure tunnel
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Length:
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5905 m
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Finish diameter:
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7.40 m
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Slope:
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0.35%
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Surge tank finish diameter:
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26.0 m
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Surge tank maximum height:
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61.5 m
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Pressure shaft finish diameter:
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5.5 m
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Penstock length:
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243.0 m
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Penstock diameter:
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5.25 m
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Generating equipment
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Turbines:
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Francis
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Number of turbines:
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3
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Rated output:
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48 mw
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Rated flow:
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47.0 m^3/s
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Design neat head:
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115 m
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Rated speed:
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300 rpm
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Power generation type:
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3 phase, synchronous
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Rated voltage:
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13.8 kv
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Rated frequency:
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50 Hz
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Power factor :
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0.85
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Transmission system:
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132 kv
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