Raghuganga Hydropower Limited

Beni, Myagdi

Estd. 2017

public

+977-69-521017

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:

1. PROJECT LOCATION

Province

Gandaki

District

Myagdi

Intake Site

Jhi, Raghuganga Rural Municipality - 05

Powerhouse Site

Tilkanya, Rahuganga Rural Municipality - 03

Geographical Co-ordinates

 

Latitude

28°22’21”N  to 28°25’45”N

Longitude

83°31’13”E  to 83°34’35”E

GENERAL

 

Name of River

Raghuganga

Nearest Town

Beni

Type of Scheme

Peaking run-of-river scheme

Gross Head (m)

292.83 

Net rated Head (m)

281.56 

Installed Capacity (MW)

2x20 = 40

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)

DRAINAGE AREA

 

Total Area

305.0 km2

The effective area below 5000 m  

287.0 km2

90% firm flow in the driest month 

6.13 m3/s

Design flow 

16.67 m3/s

Diversion During Construction

 

Type of Structure 

Diversion Channel

Design flow (dry season 1:10 years)

27.0 m3/s

RESERVOIR

 

Full supply Level

1,165.0 m

Minimum operating Level

1,160.0 m

Maximum flood Level

1,166.10 m

BARRAGE AND UNDERSLUICE

 

Type of Structure

Gated

Deck level

1,169.0 m

Spillway Crest Elevation 

1,157.0 m

Crest Level of Undersluice

1,152.0 m

Maximum height above foundation

     25.5 m

Crest Length

     21.0 m

Capacity (1 in 1000 Yr Flood)

   688.0 m3/s

DESANDER

 

Number of Bays

2.0

Nominal size of the trapped particle (mm)

>0.20

Length X Width X Depth per bay (m)

80.0 X 8.0 X 5.94

HEADRACE TUNNEL

 

Concrete Lined Length (m)

6,270.106

Internal diameter (Concrete lined) (m)

3.30

Shape

Horse shoe

Excavated shape

D Shape

Lining thickness (mm)

300.0/350.0

SURGE SHAFT

 

Diameter (Circular) (m)

10.0

Height (m)

53.15

Maximum Up Surge Level (m)

1,178.42

Minimum Down Surge Level (m)

1,142.33

BUTTERFLY VALVE CHAMBER

 

Finished Dimenssions

10m (L) X 10m (H) X 6m (W)

STEEL- LINED PRESSURE SHAFT

 

Diameter

2.15 m

Length (m)

53.15

Maximum shell thickness (mm)

 Varies from 10 to 25

Penstock- Diameter (m) (after bifurcation)

1.52

Length (m)

20.0 each

POWER HOUSE

 

Length X Width (m)

57 X 24

Centreline of Distributor pipe (m)

870.5

Turbine Type, Orientation, and Unit

Pelton, Vertical Axis, and 2 Nos

Rated flow for a unit (m3/s)

8.34

Turbine Rated Capacity (MW)

20.51

Generator Rated Capacity(MVA)

23.53

Gross Head (m)

292.83

Rated net Head (m)

281.56

Rated Turbine Efficiency

90.50 %

Rated Generator Efficiency

97.50 %

Installed Capacity (MW)

2 X 20 = 40

TRANSMISSION LINE (132 KV)

 

LILO of 220 kV Transmission line from Dana to Kushma at PH gantry 

 600 m

ACCESS ROAD

 

New Permanent road (from Powerhouse to Headworks)

10.87 km

Branch to Adits

0.8 km

Economic Indicators without Transmission Line

 

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

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: [email protected]

Website: www.raghuganga.com.np

Contact Details of Raghuganga Hydropower Limited, Myagdi

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