Power Purchase Agreement (PPA)
Grid Connection Agreement
Generation License
Financial Closure
Financial Partners
Financial Analyst
Design Consultant
Sabha Khola-B Hydropower Project (SKBHP) is located in Sabhapokhari Rural Municipality of Sankhuwasabha District in the Eastern Development Region of Nepal. It is about 26 km East from Khandbari Bazaar, the headquarters of Sankhuwasabha District.
| 1 | Project Location |
|---|---|
| Province | Province no. 1 |
| District | Sankhuwasabha |
| Intake Site | Sabhapokhari Rural Municipality |
| Powerhouse Site | Sabhapokhari Rural Municipality |
| Geographical Co-ordinates | |
| Latitude | 27° 25’ 28” N to 27° 27’ 41” N |
| Longitude | 87° 19’ 43” E to 87° 22’ 27” E |
| Conservation Area (if appplicable) | N/A |
| 2 | General |
| Name of River | Sabha, Yaksuwa and Manjuwa Khola |
| Nearest Settlement | Barabise |
| Type of Scheme | Run-of-river (RoR) |
| Gross Head | 290.00 m |
| Net rated Head | 283.01 m |
| Installed Capacity | 21500 kW |
| Peak Hour (if P-RoR) | – |
| Additional Average Annual Energy after Outage | 42.906 GWh |
| Additional Dry Season Energy | 13.165 GWh |
| Additional Wet Season Energy | 29.741 GWh |
| 3 | Hydrology |
| Catchment Area | Total Catchment: 119.45 km2 Sabha Intake: 88.15 km2 Yaksuwa Intake: 23.81 km2 Manjuwa Intake: 7.49 km2 At powerhouse: 113.90 km2 |
| Average Annual Discharge | Sabha khola at Intake=7.93 m3/s Yaksuwa khola at Intake= 2.26 m3/s Manjuwa Khola at Intake= 0.76 m3/s |
| Design Discharge (at 40% PoE) | 8.78 m3/s (Sabha and Manjuwa Intake= 7.00 m3/s Yaksuwa Intake= 1.78 m3/s |
| Riparian Release | 0.265 m3/s |
| Design Flood Discharge | For Sabha headworks: 391m3/s For Yaksuwa headworks: 90m3/s For Manjuwa headworks: 28.11 m3/s For Powerhouse: 505 m3/s |
| Average Annual Precipitation | For Sabha Khola basin: 4377.8 mm |
| 4 | Sabha Headworks |
| a. | Diversion Weir |
| Type of Weir | Boulder lined Free Overflow Gravity weir with side intake |
| Length of Weir | 24.40 m |
| Crest Elevation | 940.00 masl |
| Spillway type | Side spillway |
| Undersluice Opening (W X H) | 3.00 m x 3.00 m |
| Undersluice Crest Level | 936.50 masl |
| b. | Intake Structure cum Gravel Trap |
| Type of Intake | Side intake with trashrack |
| Nos of Opening | 2 nos. |
| Size of Intake (W x H) | 3.50 m x 1.70 m |
| Intake Crest Level | 938.05 masl |
| Length of Gravel Trap | 16.50 m |
| Width of Gravel Trap (Avg.) | 5.00 m |
| Overall depth (Avg.) | 4.87 m |
| Particle size to be trapped | Upto 5 mm size |
| c. | Desanding Basin |
| Type | Underground-Dufour double bay type |
| Number of Basin | 2 nos. |
| Number of Chambers in each basin | 1 no. |
| Dimension (L x B x H) | 82.00 m x 6.40 m x 5.00 m |
| Inlet Transition Length | 8.20 m |
| Particle Size to be settled | 0.20 mm |
| Trapping Efficiency | 90% |
| Length of Desander Access Tunnel | 180.00 m |
| Flushing Duct Size | 1.00 m x 1.00 m |
| Length of Sand Flushing Tunnel | 95.00 m |
| Size of Sand Flushing Tunnel | 3.00 m x 3.00 m |
| 5 | Manjuwa Khola Collection |
| Diversion Weir | Temporary type weir by Boulder lining and Gabion protection |
| Collection Pipe Length | 1492.16 m |
| Diameter of Pipe | 0.65 m |
| Pipe Thickness | 6 mm of E250 |
| Collection Scheme | From Manjuwa Khola to Sabha Headworks |
| 6 | Yaksuwa Khola Collection |
| Diversion Weir | Broad crested concrete diversion weir |
| Weir Crest Level | 949.30 masl |
| Length of Weir | 16.90 m |
| Undersluice Size | (1.50 m x 1.50 m) x 1 nos. |
| Intake Size | (2.50 m x 1.10 m) x 1 nos. |
| Desander Size | (35.00 m x 4.00 m x 2.30 m) x 1 nos. |
| Collection Pipe Length | 4365.00 m |
| Collection Pipe Diameter/Thickness | 1.20 m, 6-12 mm of E350 |
| Collection Scheme | From Yaksuwa Khola to Surge Pipe |
| 7 | Headrace Tunnel |
| Type | Inverted D Shaped |
| Size of HR Tunnel | 3.00 x 3.00m |
| Length of HR Tunnel | 3400.00 m (with Rock Trap) |
| Size of Adit Tunnel | 3.50 m x 3.50 m |
| Length of Adit Tunnel | 430.00 m |
| Length of Access Tunnel to Desander Outlet Gate | 135.00 m |
| Size of Access Tunnel to Desander Outlet Gate | 3.00 m x 3.00 m |
| 8) Headrace Pipe at Surge junction | 137.42 m |
| 9 | Surge Pipe |
| Type | Inclined Surge Pipe buried on sloped ground |
| Length of Surge Pipe | 126.38 m |
| Diameter of Pipe Length of Connection Pipe | 3.00 m , 22.98 m |
| Diameter of Connection Pipe | 2.00 m |
| Up Surge Level | 951.84 masl |
| Down Surge Level | 927.43 masl |
| 10 | Steel Penstock Pipe |
| Type | Mild steel welded pipe |
| Internal Diameter | 2.00 m internal diameter |
| Length | 1100.00 m with branch pipe |
| Steel Thickness | 8-26 mm of E350 BO |
| Nos. of Anchor Blocks | 20 nos. |
| 11 | Powerhouse |
| Type | Surface with Outdoor Switchyard |
| Size (L x W) | 38.00 m x 17.55 m with Control Room |
| Height | 15.80 m |
| Turbine Centerline Level | 650.00 masl |
| 12 | Tailrace |
| Type | RCC Free Flow Rectangular Culvert type |
| Length of Tailrace with Bypass Canal | 267.00 m |
| Maximum Tailwater Level | 647.00 masl |
| Size (W x D) | 2.40 m x 1.80 m |
| 13 | Turbine |
| Type | 3-jet, Horizontal axis Pelton |
| Number | 3 nos. |
| Rated Speed | 600 rpm |
| Rated Output Capacity per unit | 7.39MW |
| Turbine Centerline Level | 650.00 masl |
| Net Head | 283.88 m |
| Discharge per Unit | 2.93 m3/s |
| Efficiency | 91% |
| 14 | Governor |
| Type | Electronic PID Control |
| Adjustment for Speed Droop | 0-10% |
| 15 | Generator |
| Type | 3-phase AC synchronous |
| Rated Output Capacity per Unit | 8.43 MVA |
| Power Factor | 0.85 |
| Generation Voltage | 11 kV |
| No of Units | 3 nos. |
| Excitation System | Brushless excitation |
| Efficiency | 97% |
| 16 | Transformer |
| Type | Outdoor step-up power transformer, Single Phase |
| Rated Capacity | 10 MVA |
| Voltage Levels | 132/11 kV (Secondary/Primary) |
| No of Units | (3+1) Nos. |
| Vector Group | YNd11 |
| Efficiency | 99% |
| 17 | Transmission Line |
| Voltage Level | 132 kV |
| Length | 21.5 km |
| Conductor Type | ACSR Bear, 250 mm2 |
| From | Power plant switchyard to Tumlingtar SS |
| To | 220/132/33 kV Tumlingtar substation |
