Analysis of transmission network in the situation of large renewable sources penetration at the distribution level

U ovom radu prikazani su oblici distributivnih izvora energije koji su usko povezani s distributivnom mrežom. Dovedene su u odnos distributivna i prijenosna mreža te je također opisana mikromreža. Prikazana je kratka povijest prve verzije modela RTS – 79 te je prikazan model pomoću programskog paketa Power World. Izvršene su simulacije te su promatrani odnosi napona na sabirnicama i gubitaka. Prilikom proučavanja napona, uočena je promjena zvana Ferantijev efekt. Povećanje napona koje je nastalo na krajevima voda u odnosu na njegov početak, pojavilo se jer je vod pod naponom, a na krajevima voda je malo opterećenje ili je vod u praznom hodu. Također je pomoću istog programskog paketa prikazan „Contouring“ radi lakšeg shvaćanja problematike opterećenja mreže.In this paper various types of distribution energy generation are shown, which are closely related to the distribution grid. The relationship between distribution and transmission network was observed, and a microgrid was briefly described. The paper also shows a brief history of the model RTS – 79 and within the Power World software package. Simulations were done with the bus voltage and loss ratios observed. When studying the voltage, a phenomenon called the Feranti effect was observed. The increase in voltage that occurred at the ends of the line in relation to its beginning, occurs due to the line being underloaded or open circuited. “Contouring” is also shown using the same software package to make network load issues graphically accessible