PROJECT DETAILS

Detailed Feasibility Study of Myagdi Khola Hydropower Project 57.3 MW

  • Completed: 100%
  • Client: Hydro Village Pvt.Ltd
  • Location: Myagdi
  • Duration: 1 year
  • Budget: Rs. 6400000


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    • Project Location Development Region : Dhaulagiri Zone : Gandaki District : Myagdi Intake Site : Dovan just downstream from the confluence of Kunaban Khola and Myagdi Khola Powerhouse Site : Jeltun Village Geographical Co-ordinates Latitude : 28o 38' 00'' N to 28o 33' 20'' N Longitude : 83o 25' 00" E to 83o 21' 50" E 2 General Name of River : Myagdi Khola Nearest Town : Darbang Type of Scheme : Run-of-River (ROR) Gross Head : 564.00 m Net rated Head : 537.23 m Installed Capacity : 57.30 MW Average Annual Energy after Outage : 334.36 GWh 3 Hydrology Catchment Area : 306 km 2 Mean Annual Discharge : 23.56 m3/s Design Discharge (at 40%PoE) : 12.5m3/s Riparian Release : 0.417m3/s Design Flood Discharge : 659.46m3/s at intake 731.49m3/s at Powerhouse Average Annual Precipitation : 2171.53mm. 4 Diversion Weir Type of Weir : Concrete gravity structure with overflow weir section (Broad crested weir) Length of Weir : 15.00 m Crest Elevation : 2417.0masl Spillway type : Ogee Shape Under sluice Opening (W X H) : 2.50m x 3.40m Under sluice Crest Level : 2413.30 masl 5 Intake Structure cum Gravel Trap Type of Intake : Side intake (Orifice type) Nos of Opening : 3 Nos Size of Intake (W x H) : 2.80 m x 1.80 m Intake Normal Water Level : 2417.0 masl Length of Gravel Trap : 9.80 m Width of Gravel Trap (Avg.) : 10.40m Overall depth : 7.5 m Particle size to be trapped : 4 mm Flushing Channel : 1.00m x 1.00m (W x H) 6 Feeder Tunnel Type : Free flow Length : 439 m Size (W x B) : 3.20m x 3.50m 7 Desanding Basin Type : Hopper type Dimension (L x B x H) : 95m x 10m x 11.21m Inlet Transition Length : 22.10 m Particle Size to be settled : 0.15 mm Trapping Efficiency : 100% based on Camp’s theory and 87.42% based on Vetter’s theory 8 Headrace Tunnel Type : D-shaped Internal Diameter : 3.20 x 3.50 m Length : 5644 m Steel Thickness/Type of Lining : Concrete lining Nos. of Anchor Blocks : 7 nos 9 Surge Tank/Forebay Type : Surface Effective Depth : 36 m Diameter (Or size) : 8 m Up Surge Level : 2429.68 masl Down Surge Level : 2398.34 masl Normal Operation Level : 2412.36 masl 10 Steel Penstock Pipe Type : Surface and subsurface; mild steel Internal Diameter : 1.8 m to 2.0 m Length : 1069m up to bifurcation 45 m after bifurcation Steel Thickness : 12 to 42 mm Nos. of Anchor Blocks : 7 nos Nos. of Saddle Supports : 36 Nos 11 Vertical Shaft No of shafts 2 nos Length of shaft Shaft-1=141 m, Shaft-2=238 m Size 3.5 m dia of each 12 Powerhouse Type : Surface Size (L x W) : 44.5m x 14 m Height : 22 m Turbine Axis Level : 1853 masl 13 Tailrace Type : Box Culvert Tailrace Length : 60 m Size (W x D) : 4.5m x 2.6m (WxH) Tailrace Water Level : 1850.0 masl 14 Turbine Type : Pelton (Vertical axis) Number : 3 Rated Output Capacity per unit : 19100 Kw Turbine Axis Level : 1853 masl Net Head : 537.23 m Discharge per Unit : 4.17 m3/s Efficiency : 90% 15 Governor Type : microprocessor control Adjustment for Speed Drop : 0-0.1% 16 Generator Type : Synchronous, 3-phase Rated Output Capacity per Unit : 22.50 MVA Power Factor : 0.85 (lagging) Voltage : 11 Kv Frequency : 50 HZ No of Units : 3 Nos Excitation System : Static excitation System Efficiency : 96% 17 Transformer Type : 3-phase, oil-immersed Rated Capacity : 22.50MVA Voltage Ratio : 132 kV/6.5 No of Units : 3 Nos Vector Group : YNd11 Efficiency : 99% 18 Transmission Line Voltage Level : 132 kv Single Circuit Length : 17 KM Conductor Type : Wolf From : Powerhouse To : Dada Khet S/S, Myagdi 19 Project Cost Estimate Total Cost of the Project : NRs. 9,691,514,000.00 20 Construction Period : 3 Years