Kruonis Pumped Storage Plant

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The pumped storage power plant Kruonis (English: Kruonis Pumped Storage Plant, KPSP ) is at Kruonis in Lithuania. Was built the powerhouse of 1974 until 1992.

It uses water power from artificial water basins, which are located at different geographical levels. Its main purpose is to provide a reserve for the power plant system to regulate the load curve of the power grid during the day. It works in conjunction with the Kaunas hydroelectric power plant (s). During times of day with low power requirements (usually at night), the power plant is operated in the pumping mode and pumps water with an excess of cheap energy from the lower Kaunas Reservoir in the upper basin. During a deficit of electric current pumped storage power plant works like a normal hydroelectric power plant and allows water to run from the upper pool in the lower, thus additional current is generated. With fully filled upper basin, the power plant can produce about twelve hours 900 MW. To compensate for the power deficit in the event of failure of the Ignalina nuclear power plant rapidly, the generators of the KPSP are automatically put into operation. ( The nuclear power plant is now shut down. )

The electric current from the power plant is passed through a 330 kV line from Elektrėnai where the Elektrėnai power plant (s), the largest fossil-fuel power plant in Lithuania is, to Kaunas.

Specifications

Currently, the pumped storage power plant Kruonis has an installed capacity of 900 MW in four units each of 225 MW. The planned capacity of the pumped storage power plant after expansion is 1,600 MW in eight units of 200 MW.

Pump-turbines

The pumped storage power plant has radialachsige pump turbines with a diameter of 6.3 m, which are operated at 150 revolutions per minute and a pressure rating of 100 m. In operation, the turbine pump turbines provide 205 MW each at a flow rate of 226 m³ / s, the pumping operation, they make 217 MW at a flow rate of 189 m³ / s

Generators

The vertical axis synchronous generators have a power output of 236 MW at a generator voltage of 15.75 kV. The mass of the generators located at 1120 t.

Reverse channel

The reverse channel is 10 m deep, on the surface 250 m and 189 m wide at the bottom.

Piping

The pipes are 840 m long, with an inner diameter of 7.5 m and an outer diameter of 8.4 m.

• Number of Poles: 2800 (diameter: 1 m )

Upper basin

The upper reservoir is 140.0 to 153.5 m above sea level, the sole and is situated on 138 meters above the sea. It has a total volume of 48 million cubic meters, of which 41 million m³ are used by the pumped storage power plant. The basin has an area of ​​area: 3.06 km ². The extent of the basin is 6.8 km, of which 6.3 km are realized by a causeway.

The intake structure is 127 m long, 70 m wide and 50 m.