Reduction of electricity losses in feeder Kopanica with transition to 20 kV voltage level

Smanjenje gubitaka električne energije nameće se u jedan od važnijih poslovnih ciljeva u HEP-u Operatoru distribucijskog sustava. Na poslovima smanjenja se sustavno radi dugi niz godina, što rezultira polaganim ali kontinuiranim smanjenjem. Smanjenje broja transformacija napona, odnosno prelazak na 20 kV napon je jedan od načina smanjenja tih gubitaka te se postupno brojni 10 kV i 35 kV vodovi prebacuju na 20 kV. U ovom radu je opisan prelazak jednog VP, odnosno izvoda sa 10 kV na 20 kV napon. Pokazat će se koliko su na ovaj način smanjeni gubici, koliko je koštala ukupna investicija, te za koliko vremena se očekuje povrat investicije, odnosno opravdanost same investicije.Deacreasing energy losses arises in one of the most important business objectives in HEP Distibution System Operater. The tasks of reducing energy losses is a work in progress for many years, resulting in a slow but continuous decline. Reducing the number of voltage transformation, ie switching to 20 kV voltage is one of the ways to decrease the energy losses, so numerous 10 kV and 35 kV lines are gradually switching to 20 kV voltage. This paper describes the transition of a feeder ie power line from 10 kV to 20 kV voltage. It will be shown how the losses are reduced in this way, how much is the total investment cost, and how long is expected return on investment, ie justification of the investment itself