Aerial view of headworks and dam site area of Tanahu Hydropower project / latest progress on work/ скачать в хорошем качестве

Aerial view of headworks and dam site area of Tanahu Hydropower project / latest progress on work/

Salient Features of the Project Reservoir Full Supply Level : 415 m Minimum Operation Level: 378 m Available Depth : 37 m Sedimentation Level 320 m : 320 m Gross Storage Capacity 295.1 × 106 m3 : 295.1 × 106 m3 Effective Storage Capacity: During first 10 years 192.8× 106 m3 After 11th year; 181.7 × 106 m3 Diversion Tunnel Design Flood : 2,305 m3/s (20 years return period) Numbers: 2 Type of Tunnel : Concrete lined pressure flow m Length : Diversion Tunnel 1-606 m, Diversion Tunnel 2- 666 m Inner Diameter : 10 m Dam Type : Concrete Gravity Elevation of Dam Crest: 420.0 m Height of Dam : 140 m Length of Dam Crest : 215 m Volume of Dam : 929 × 103 m3 Auxillary Dam Type : Weir resting on bore piles wall Length of Crest: 133 m Height : 30.6 m Volume : 121,980 m3 Sediment Flushing Facilities Inlet Sill Elevation : 320 m Gradient of Conduit:1:15 Upstream Maintenance Gate Span x Height :Slide Type Steel Gate 5 m x 5m Intermediate Main Gate Span x Height :High Pressure Slide Gate 5 m x 5 m Downstream Auxiliary Gate Span x Height :High Pressure Slide Gate 5 m x 5.2 m Spillway Design Flood : (7,377 m3/s) Type: Chute Elevation of Overflow Crest : EL. 398.1 m Width of Overflow Crest : 51.32 m Energy Dissipater : Roller bucket Type of Gate : Radial (4 Nos.) Size of Gate (span x height) : 12.83 m x 18.1 m Intake Number : 1 Intake Type: Tower Type Intake Gate Type : Vertical Lift Fixed Wheel Type Steel Gate Size of Gate (span x height) : 6 m x 9 m Headrace Tunnel Number : 1 Inner Diameter: 7.4 m Total Length : 1469.6 m Surge Shaft Type : Restricted Orifice Shaft Height/Diameter: 28 m/ 61.5 m Diameter/Height of Riser : 7.4 m/22.8 m Diameter of Orifice : 5 m Penstock Type : Tunnel Number: 1 Inner Diameter: 5.7 m to 4 m Total Length : 160 m (including one (1) branch pipe length) Draft Tunnel Length : 99.4m Type of Draft Gate: Vertical Lift Slide Type Steel Gate Size of Draft Gate (span x height): 5 m x 3.1 m Tailrace Tunnel Diameter : 7.4m Length: 213 m Outlet Type: Outlet With Draft Pond Type of Tailrace Gate : Vertical Lift Slide Type Steel Gate Size of Tailrace Gate (span x height): 7.4 m x 7.4 m Powerhouse Type : Underground Size: 22 m wide × 45 m high × 89 m long Development Plan Rated Intake Water level : 405.0 m Tail Water Level: 289.2 m Gross Rated Head: 115.8 m Maximum/Rated Effective Head : 121.55 m/111.7 m Maximum/Rated Discharge : 131.2 m3/s /127.4 m3/s Number of Unit : 2 Install Capacity : Rated capacity: 127 MW, Maximum capacity: 140 MW Peak Time : 6 hours Primary Energy : 178.9 GWh Secondary Energy : 323.6 GWh Total Energy : 502.5 GWh Turbine Type : Vertical Shaft, Francis Turbine Number: 2 Maximum/ Rated Output: 71,800 kW/64,700 kW Revolving Speed : 300 min-1 Generator Type : Three-phases, Synchronous Generator Number: 2 Maximum/ Rated Output: 82,300 kVA/74,700 kVA per unit Revolving Speed : 300 r/min Frequency : 50 Hz Rated Voltage : 13.2 kV Power Factor : 0.85 lag Switchyard Type : GIS (Gas Insulated Switchyard) Bus System: Double Buses Number of Bays: 5 Voltage : 220 kV Generation Facility : Rated/Maximum Effective Head :93 m/103.3 m Environmental Discharge : 2.4 m3/s Flow Turbine Type : Horizontal Type, Francis Turbine Number of Turbine/Generator: 1 Turbine Rated Output/ Maximum Output: 1,900 kW /2,100 kW Generator Type : Horizontal Type, Three-phase Synchronous Generator Rated Generator Capacity : 2,300 kVA Distribution Transformer : 3-Phase Dry Type, Rated Capacity 2,305 kVA Average Energy : During first 10 years; 14.0 GWh after 11th years; 13.0 GWh 220 kV Transmission Line Conductor Type : 380 mm2 × ACSR (Bison) Number of Circuit: 2 Voltage: 220 kV Length : 36.43 km Type of Transmission Tower : Steel lattice tower Number of Steel Tower : 94 220 kV Bharatpur Substation Number of Bays : Five (5) bays, of which Two (2) bays for transmission lines, Two (2) bays for interconnection to 132 kV substation, and One (1) bay for bus coupler Inter bus Transformer: Capacity 83,300 kVA x 2 units Primary 220kV, Secondary 132 kV and Tertiary 11 kV Voltage: 220 kV Length : 36.43 km Type of Transmission Tower : Steel lattice tower Number of Steel Tower : 94