For our customer Soške elektrarne d.o.o. (SENG), we designed, supplied and installed all the electrical and mechanical equipment for a powerplant on the Kneža river, complete from the concept design to facility commissioning.
We installed a turbine inlet valve (TIV), a pressure relief valve (PRV), a new Francis turbine, and a new generator. As already mentioned, the aggregate contains a PRV, which redirects the water flow through the by-pass pipe upon the rapid closure of the turbine. The distributor is quickly closed and the PRV is simultaneously opened and the water pressure in the penstock increases only by a minimal margin. The PRV then slowly closes and thus maintains a minimal increase in pressure in the penstock (approximately to 30%).