Simple mathematical model of pump-storage hydroelectric power plant

Ovaj rad bavi se opisivanjem principa rada reverzibilnih hidroelektrana te njihovom svrhom u smislu odgovarajućih postrojenja za skladištenje električne energije. Pregledom hrvatskog elektroenergetskog sustava dan je uvid u važnost hidroelektrana koje one imaju za proizvodnju električne energije u Hrvatskoj te je općenito napravljena osnovna podjela hidroelektrana prema načinu rada. Na primjeru RHE Velebit napravljen je jednostavan matematički model kojim su dobivene neke od osnovnih veličina svake hidroelektrane te se ujedno i detaljnije opisalo samo postrojenje Velebit. Nadalje, RHE Velebit smještena je u svjetski kontekst usporedbom sa nekoliko najvećih i najmodernijih reverzibilnih postrojenja u svijetu. Za kraj, predstavljeno je idejno rješenje problema skladištenja električne energije proizvedene u vjetroelektranama prema primjeru projekta pretvorbe hidroelektrane Hoover Dam i njenog akumulacijskog jezera u golemu „bateriju“ u kojoj bi energija iz nekonzistentnih alternativnih izvora energije poput vjetra i sunca mogla biti uskladištena.This paper deals with the description of the working principles of reversible hydroelectric power plants and their purpose as electric energy storage facilities. Reviewing the Croatian Electric Energy Power System has given an insight in the importance of hydroelectric power plants regarding the total electric energy production in Croatia. As well as that, a general classification of hydroelectric power plants was made. A simple mathematical model on the example of the reversible hydroelectric power plant Velebit has been carried out which gave some of the fundamental values of every hydroelectric power plant and also described the Velebit facility in more detail. Furthermore, the RHE Velebit was put in a wider perspective by comparing it with some of the largest and most advanced similar facilities in the world. In the end, a theoretic solution for storing the electric energy produced in wind farms has been introduced. It was described more in detail on the example of a project that aims for turning The Hoover Dam hydroelectric power plant and its accumulation lake in a gigantic „battery“ in which the electric energy produced from inconsistent alternative energy sources, such as wind or the sun, could be stored