First HPP in the “Vlasinske HPPs” system. First time synchronized in 1955.
The most important “Vrla I” characteristics with appurtenant structures are given below:
- Reservoir
| Total volume | 165 + 7 million m3 |
- HPP
| Type | storage |
| Maximum head | 338 (337.96) m |
| Minimum head | 314 (314.10) m |
| Installed discharge | 18.32 m3/s |
| Installed power | 2 x 11.94 + 2 x 14.52= 50.66 MW |
| Annual electricity generation | 95 GWh |
| Number of units | 4 + 1 (service) |
| Turbine type | Pelton, vertical |
(Source: PU EPS Web site)