Small Hydroelectric Power Plant Potamia

The SHPP Potamia utilizes a net head of 210 meters, achieved over a stretch of approximately 2.9 kilometers along the stream bed, between elevations of 1,037 meters and 819 meters, through a penstock with a total length of 3,500 meters. All project components — including the powerhouse, intake structure, and penstock — are located south of the settlement of Mikrolivado, in the Grevena region.

The SHPP Potamia has a maximum flow capacity of 1 m³/s, corresponding to a maximum turbine output of 1.64 MW. The expected annual energy production is approximately 5.2 GWh.

The electromechanical equipment of the power station is housed in a building of about 120 m² and includes a vertical-axis Pelton turbine with six nozzles, a 2,100 kVA synchronous generator, a 2,100 kVA transformer, an electrohydraulic governor, automation systems, and low- and medium-voltage switchboards.

The intake structure consists of a small overflow weir, 2 meters in height, equipped with Coanda-type screens. The penstock, with a total length of 3,500 meters, is made of GRP and divided into three equal sections with diameters of 900 mm, 800 mm, and 700 mm, respectively. A 30-meter section near the powerhouse is constructed from spiral-welded steel pipe.

The entire length of the penstock—except for the stream crossing—has been installed underground. The largest portion (approximately 2,800 meters) follows a forest road, ensuring minimal visual impact on the surrounding environment.