koka power station description
| Parameters |
Detail desription |
| Power house |
| Commencement of construction : |
1957 |
| Completion of construction: |
1960 |
| Date of commission |
January to May 1960 |
| production capacity: |
average: 110 GWh
firm: 80 GWh |
| Capacity |
Installed : 43.2MW
firm : 34.5 MW
Units : 3 x 14.4 |
|
| Reservoir |
| Maximum level: |
1590.7 m(a.s.l) |
| minimum level: |
1580.7 m(a.s.l) |
| Total storage capacity |
at 1590.7m --- 1,850*1,000,000 m3 |
| Usable storage capacity |
1,680*1,000,000 m3 |
| Reservoir area |
at 1590.7m --- 236 km2 |
| Regulating flow |
42.3 m3/s |
|
| Dam |
| Type |
concrete gravity dam |
| Crest elevation |
1593.2m(a.s.l) |
| Crest length |
458 m |
| Maximum height |
23.8 m |
| Max. spillway Discharge |
1000 m3/s |
|
| Water conductors |
| Diameter |
71.5 m |
| Pressure tunnel length |
5.5 m |
| Concrete pipeline length |
145.37 m |
|
| Surge tank |
| Height |
20 m |
| Diameter |
18 m |
|
| penstocks |
| Number |
3 |
| Diameter |
3.5 m |
| Length |
50.7/55.4/61.1 m |
|
| Suppliers & Contractors |
| Civil work |
impresit |
| Generator |
Ercole Mareli |
| Power transformer |
C.G.E. |
| Switch gear & busbar |
Galelio and Magrini |
| transmission line |
SAE, Italy |
| Power house crane |
Galelio |
|
| Turbines |
| Type |
Francis , vertical |
| Rated output |
3x15.2/13.3/9.5 MW |
| Rated head |
42/38/30.8 m |
| Rated discharge |
Galelio m3/s |
| Rated speed |
214 rpm |
| Runaway speed |
410 rpm |
|
| Generators |
| Type |
by dr.sha6h |
| Rated out put |
3 x 18 MVA |
| Rated frequency |
50 Hz |
| Rated voltage |
10.5+/-10% kv |
| power factor |
0.8 |
|
| Transformers |
| Type |
3-phase synch. Gen. |
| Rated output |
3 x 18/18/6 MVA |
| Rated frequency |
50 Hz |
| Rated voltage |
10.5+or-10% kv |
| Connection type |
delta/star/star |
| Impedance voltage |
10/8/5/4% on 18/6/6 MVA base |
|
| Station battery |
| Capacity(10hours) |
144 Ah |
| Rated voltage |
220 v |
|
| Switch gear & bus bar |
| rated voltage |
132 kv |
| Max. service voltage |
156 kv |
| short circuit capacity |
2500 MVA |
| Busbar conductor |
240 mm2 |
|
