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Naponski propadi u tvornicama papira uzrokuju značajne probleme. Kada do navedenog problema dođe pogon za proizvodnju papira može biti u dugotrajnom zastoju. Zbog toga se traže metode za sprječavanje naponskih propada. Rad proučava tvornicu papira, naponske propade, te rješenja za smanjenje ili ukidanje problema naponskih propada. Postoji velik broj metoda za sprječavanje ili ublažavanje problema naponskih propada. U radu ih je navedeno petnaest. Određene metode djeluju odmah ali samo kratko vrijeme, neke djeluju sa zakašnjenjem, a neke u potpunosti suzbijaju problem. Metoda za borbu s naponskim propadima se bira na temelju kvalitete elektroenergetskog sustava, pozicije u mreži, učestalosti naponskih propada, troškova koje stvaraju naponski propadi, te na temelju troškova koje će stvarati metoda za suzbijanje istih. Na temelju svega navedenog svaka tvornica treba odlučiti koja metoda im je najprihvatljivija. Voltage sag in a paper mill plant causes significant problems. When it comes to that particular problem the whole plant for the paper production must stop with production and clean itself. Beacause of that reason, we search for methods to prevent voltage collapse. This thesis examines the paper factory, voltage dips and solutions for the reduction or elimination of these problems. There are a number of methods to prevent or mitigate the problem of voltage dips. In this thesis it has been noted fifteen of them. Certain methods perform immediately but only a short amount of time, then some of them perform with certain delays, while other methods fully combat the problem. The choice of method to combat the voltage sag depends primarily on the quality of the electric system, then it's position in the network, the frequency of voltage dips, the cost of generating voltage dips, and finally on neccessary costs required to create methods for combating them. Based on the statements above, it can be concluded that each particular factory should decide which method is suitable for them. |
