Salient Technical Features
Item |
Description |
Concession Period |
30 years (commencing at COD) |
Design Discharge (Project) |
1260 m3/sec |
Rated Net Head |
61.7 m |
Gross Generation at Generator Terminals |
3299 GWh |
Net Generation |
3265.81 GWh (net of auxiliary consumption) |
Plant Factor |
53.6 % |
Power Purchaser |
Central Power Purchasing Agency Guarantee Limited |
DAM & SPILLWAY: |
|
Dam Crest Level |
535 m.a.s.l |
Crest El. of overflow section |
526 m.a.s.l |
River Bed level at Dam |
450 m.a.s.l |
Maximum Reservoir Level at Dam (PMF) |
535 m.a.s.l |
Maximum flood (PMF) |
35,650 m3/sec |
Spillway Gates – type |
7 nos radial with overspill capacity |
Spillway Gates - size |
Width 14m x Height 20m |
Low level Outlet Gates –type |
2 No. radial gates |
Low level Outlet Gates –size |
Width 6.75m x Height 8m |
Roller Bucket Energy Dissipator - invert level |
450 m.a.s.l |
HEADRACE & PENSTOCK: |
|
Four (04) Tunnels-Overall Lengths |
122m/136m/160m/184m |
Design discharge (Unit) |
315 m3/sec |
Headrace / Penstock Diameter |
8.2m |
DIVERSION TUNNEL: |
|
Tunnel length |
400 & 495 m |
Tunnel width |
12.5 m |
Tunnel height |
14 m |
POWERHOUSE: |
|
Accommodation |
Surface loading bay building, underground machine hall. The main transformer is located on the surface near powerhouse entrance. |
Surface building (length x width) |
40m x 20m |
Surface building cranage |
1 x OET |
Crane capacity |
275/25/5 tonnes |
Machine Hall (length x width) |
170m x 20m |
Machine Hall cranage |
2 x OET |
Crane Capacity |
275/25/5 tonnes |
Turbine generators installed |
4 No. |
Type of Turbine, power (each) |
Francis, 175.175 MW |
Speed |
111.1 rpm |
Discharge max, min (per turbine) |
315m3/s, 189 m3/sec |
Generator Transformers |
Single phase, 12 No. |
TAILRACE TUNNEL: |
|
Tunnel U1 |
Length 150m. Cross section 8.5m x 9.5m; U shaped |
Tunnel U2 |
Length 184m. Cross section 8.5m x 9.5m; U shaped |
Tunnel U3 |
Length 211 m; Cross Section 9.5 m x 10.5 m; U shaped |
Tunnel U4 |
Length 238 m; Cross Section 9.5 m x 10.5 m; U shaped |
Tunnel Discharge Capacity |
315 m3/sec |
Maximum Tailwater Level with 4 units in operation at rated discharge |
461.76 m.a.s.l. |
Maximum Tailwater Level with one unit in operation at rated discharge |
461.08 m.a.s.l. |
Maximum Tailwater Level (PMF) |
503 m.a.s.l. |
RESERVOIR: |
|
Full Supply Level |
526 m.a.s.l. |
Reservoir Length |
~22 km |
Reservoir Area |
3.8 km2 |
Note:All of the above data is based on the Project Feasibility Stage design and the Optimized Feasibility Design as approved by POE of PPIB.