Salient Features of Charanawati (Middle) Small Hydropower Project

Salient Features of Charanawati (Middle) Small Hydropower Project

Project Location

Development Region                                                    : Central

Zone                                                                             : Janakpur

District                                                                           : Dolakha

Intake Site                                                                     : Kaule, Bhimeshwor Municipality

Powerhouse Site                                                           : Dulalgau, Bhimeshwor Municipality

General

Name of River

 

: Charanawati Khola

Nearest Town : Charikot
Type of Scheme : Run-of-river
Gross Head : 199.00 m
Installed Capacity : 3,600 kW
Average Annual Energy after Outage & Losses : 20.529 GWh
Hydrology
Catchment Area

Mean Annual Discharge

Design Discharge

: 75.7 Km2

: 3.67 m3/s

: 2.19 m3/s

Probability of Exceedance

Riparian Release

Design Flood Discharge

: 40 %

: 0.049 m3/sec

: 254 m3/s (100Yr. flood)

Diversion Weir/Undersluice
Type of Weir : Free Overflow Gravity Type
Crest Length of Weir : 24.0 m
Height of Overflow Weir : 2.50 m (Excluding Foundation)
Crest Elevation : 1,250.00 m
Design Flood Level : 1,252.40 m
Size of Undersluice Gate : (2.00 m x 2.00 m) x 2 Nos.
Crest Level of Undersluice : 1,247.50 m
Intake
Type : Side Intake
Crest Elevation : 1,248.80 m
Size : (1.6 m x 1.2 m) 2 Nos.
Size of Gravel Trap : 8.0 m x 4.0 m x 5.1 m

Approach Canal/Emergency Spillway

Type                                                                             : Rectangular (Close/Open)

Length of Close Duct                                                   : 47.6 m

Size of Close Duct                                                       : 1.6 m x 1.3 m

Generator

Type                                                                             : Synchronous, Three phase

Rated output capacity per unit                                     : 2,250 kVA Power

factor                                                                            : 0.80

Voltage                                                                         : 6.3 kV

Frequency                                                                    : 50 Hz.

No of units                                                                     : Two

Excitation system                                                        : Brushless

Efficiency                                                                      : 96 %

Transformer

Type                                                                             : Outdoor, Oil Immersed

Rated capacity                                                             : 4,500 kVA Three Phase x 1

Voltage ratio                                                                : 6.3/ 33 kV

Efficiency                                                                      : 99 %

Transmission Line

Voltage level                                                                : 33 kV

Length (approx.)                                                          : 7 km

From                                                                             : Powerhouse (HEP)

To                                                                                 : Makaibari sub-station

Conductor                                                                    : ACSR “DOG”

 

 

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