Overview
Raghuganga Hydropower Limited (RGHPL) was established with an aim of power generation of 40 MW in Raghuganga Rural Municipality, Gandaki Province of Myagdi District. Nepal Electricity Authority (NEA) owns cent percent share of this project.
The project is located between the Latitudes 28°22’21” to 28°25’45” N and the Longitudes 83˚31’13” to 83˚34’35”E in Gandaki Provine of Myagdi District. The major components of the Project lie on the left bank of Rahughat Khola. Rahughat is one of the major tributaries of the Kaligandaki River that flows from west to east to meet the Kaligandaki River at Galeshwor.
The design discharge will be diverted at the headworks in a 6.270 km headrace tunnel to generate 40 MW of power in the powerhouse located on the right bank of the Kaligandaki River at Galeshwor.
The headworks of Raghuganga Hydropower Limited (RGHPL) are located about 1.2 km upstream from the existing suspension bridge that connects the former Piple VDC and Jhi VDC.
The proposed headrace tunnel runs along the left bank of Rahughat Khola through Mauwaphat and Piple villages. The surge shaft is located at Piple village and the surface powerhouse lies about 300 m upstream from the confluence of Rahughat Khola and Kaligandaki River on the Beni-Jomsom Highway.
Summary:
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1. PROJECT LOCATION |
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Province |
Gandaki |
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District |
Myagdi |
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Intake Site |
Jhi, Raghuganga Rural Municipality - 05 |
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Powerhouse Site |
Tilkanya, Rahuganga Rural Municipality - 03 |
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Geographical Co-ordinates |
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Latitude |
28°22’21”N to 28°25’45”N |
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Longitude |
83°31’13”E to 83°34’35”E |
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GENERAL |
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Name of River |
Raghuganga |
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Nearest Town |
Beni |
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Type of Scheme |
Peaking run-of-river scheme |
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Gross Head (m) |
292.83 |
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Net rated Head (m) |
281.56 |
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Installed Capacity (MW) |
2x20 = 40 |
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Average Annual Energy after Outage |
238.59 GWh (Peak Energy = 27.95 GWh, Non Peak Energy =50.26 GWh and Wet Energy = 160.37 GWh) |
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DRAINAGE AREA |
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Total Area |
305.0 km2 |
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The effective area below 5000 m |
287.0 km2 |
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90% firm flow in the driest month |
6.13 m3/s |
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Design flow |
16.67 m3/s |
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Diversion During Construction |
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Type of Structure |
Diversion Channel |
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Design flow (dry season 1:10 years) |
27.0 m3/s |
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RESERVOIR |
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Full supply Level |
1,165.0 m |
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Minimum operating Level |
1,160.0 m |
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Maximum flood Level |
1,166.10 m |
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BARRAGE AND UNDERSLUICE |
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Type of Structure |
Gated |
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Deck level |
1,169.0 m |
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Spillway Crest Elevation |
1,157.0 m |
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Crest Level of Undersluice |
1,152.0 m |
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Maximum height above foundation |
25.5 m |
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Crest Length |
21.0 m |
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Capacity (1 in 1000 Yr Flood) |
688.0 m3/s |
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DESANDER |
|
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Number of Bays |
2.0 |
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Nominal size of the trapped particle (mm) |
>0.20 |
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Length X Width X Depth per bay (m) |
80.0 X 8.0 X 5.94 |
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HEADRACE TUNNEL |
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Concrete Lined Length (m) |
6,270.106 |
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Internal diameter (Concrete lined) (m) |
3.30 |
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Shape |
Horse shoe |
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Excavated shape |
D Shape |
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Lining thickness (mm) |
300.0/350.0 |
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SURGE SHAFT |
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Diameter (Circular) (m) |
10.0 |
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Height (m) |
53.15 |
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Maximum Up Surge Level (m) |
1,178.42 |
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Minimum Down Surge Level (m) |
1,142.33 |
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BUTTERFLY VALVE CHAMBER |
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Finished Dimenssions |
10m (L) X 10m (H) X 6m (W) |
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STEEL- LINED PRESSURE SHAFT |
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Diameter |
2.15 m |
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Length (m) |
53.15 |
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Maximum shell thickness (mm) |
Varies from 10 to 25 |
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Penstock- Diameter (m) (after bifurcation) |
1.52 |
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Length (m) |
20.0 each |
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POWER HOUSE |
|
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Length X Width (m) |
57 X 24 |
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Centreline of Distributor pipe (m) |
870.5 |
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Turbine Type, Orientation, and Unit |
Pelton, Vertical Axis, and 2 Nos |
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Rated flow for a unit (m3/s) |
8.34 |
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Turbine Rated Capacity (MW) |
20.51 |
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Generator Rated Capacity(MVA) |
23.53 |
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Gross Head (m) |
292.83 |
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Rated net Head (m) |
281.56 |
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Rated Turbine Efficiency |
90.50 % |
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Rated Generator Efficiency |
97.50 % |
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Installed Capacity (MW) |
2 X 20 = 40 |
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TRANSMISSION LINE (132 KV) |
|
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LILO of 220 kV Transmission line from Dana to Kushma at PH gantry |
600 m |
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ACCESS ROAD |
|
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New Permanent road (from Powerhouse to Headworks) |
10.87 km |
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Branch to Adits |
0.8 km |
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Economic Indicators without Transmission Line |
|
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Project Cost |
NRs. 859.89 crore. |
|
Total Annual Energy |
247.89 GWh |
|
Firm Energy (90 % Hydrological Firm) |
137.71 GWh |
|
Secondary Energy |
110.18 GWh |
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Benefit / Cost at 10 % discount rate |
1.09 |
Facilities for Black Start, Off-Grid Mode Operation, or Local Grid Mode Operation shall be incorporated in the Project.
Note: Dimensions given above are approximate values. Dimensions and other minor details given above which do not adversely affect the performance of the Project as required by or envisaged in this PPA may change during the detail engineering and construction phase, provided that such deviations/changes are approved by Coordination Committee.
Contact Details:
Beni, Myagdi, Nepal, Gandaki Pradesh, Nepal
Phone: +977-69-521017
Email: info@raghuganga.com.np
Website: www.raghuganga.com.np
