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Cilj rada je dati uvid u različite FACTS tehnologije te testirati UPFC uređaj spojen na 400 kV sabirnicu u TS Ernestinovo koji će regulirati tokove djelatnih i jalovih snaga i održavati napon u zadovoljavajućim granicama u programskom paketu DIgSILENT. Prvo je spomenuta teorija prijenosa električne energije potrebna za razumijevanje rada i svrhe FACTS uređaja. Objašnjene su vrste kompenzacije jalove snage te spomenute specifičnosti Hrvatskog prijenosnog sustava. Nastavak rada se bavi tematikom FACTS uređaja. Ukratko je objašnjen razlog primjene, razvoj i podjela uređaja i dan je detaljan pregled pojedinačnih FACTS uređaja. UPFC uređaj i prijenosna mreža Republike Hrvatske su modelirani u programskom paketu DIgSILENT Power Factory 2021 i izvršena je analiza tokova snaga za različite vrijednosti djelatne i jalove snage UPFC uređaja te na temelju toga doneseni zaključci. Na kraju je dan osvrt na tehno-ekonomsku analizu potencijalnog UPFC uređaja priključenog na 400 kV sabirnicu u TS Ernestinovo. The goal of this paper is to provide insights into various FACTS technologies and test a UPFC device connected to a 400 kV bus in substation Ernestinovo that will regulate the flow of active and reactive power and maintain voltage within satisfactory limits in the software package DIgSILENT Power Factory 2021. Firstly, power transmission theory is mentioned which is needed for the understanding of the operation and the purpose of FACTS devices. The types of reactive power compensation are explained and specifics of the Croatian transmission grid are mentioned. The continuation of the paper deals with the topic of FACTS devices. The reason for application of FACTS devices, their development and classifications are briefly mentioned and a detailed overview of individual FACTS devices is given. The UPFC device and the Croatian transmission grid were modeled in the software package DIgSILENT Power Factory 2021 and the power flow analysis was performed for different power ratings of UPFC based on which conclusions were given. Finally, a review of the techno-economic analysis of a potential UPFC device in substation Ernestinovo is given.

Rad se bavi pitanjem odnosa između religije i rata, naizgled dva suprotna pojma koja se kroz povijest često znaju isprepletati i surađivati. Rana društva naglašavala su funkcionalnu i integrativnu ulogu religije. Svete knjige velikih monoteističkih religija ne upućuju poziv, a ni povod sudjelovanju u ratnim sukobima, no njihovi pristaše mijenjaju svoje učenje kada dođu u susret s ideološkim interesima. Time se nasilnim sukobima pokušava dati religijsko opravdanje. Religija je često zloupotrijebljena od strane nacionalističke politike koja koristi religijsko pamćenje u svrhu buđenja kolektivnog sjećanja. Kolektivna sjećanja zatim prelaze u kolektivna djelovanja koja prelaze u rat. Primjer nacionalističke politike koja podsjeća na kolektivna sjećanja te upliće religijski identitet u ratni sukob imamo na prostorima bivše Jugoslavije. Ovaj rad kao primjer uzima srpsko – albanski sukob na Kosovu koji je primarno etničkog karaktera, ali u njemu pronalazimo i religijske elemente. The paper tries to explore the relation between religion and war. Although they may seem as two opposite notions many historical events have shown their cooperation. Early societies have expressed functional and integrative role of religion. The holy books of the great monotheistic religions do not call for a participation in war conflicts, but their adherents change their teachings when they become aware of ideological interests. With that they are trying to give conflicts religious justification. Religion is often misused by nationalistic politics that try to utilize religious memories for awakening collective memories. Collective memories soon turn into collective actions that further lead to war. On the area of the former Yugoslavia we have the example of nationalistic politics that manipulates with collective memories and involves religion identity into a war conflict. This paper follows Serbo – Albanian conflict on Kosovo that is primarily an ethnic one with some religious elements in it.

Glavni problem kojim se bavio rad je sinteza sustava upravljanja koji će upravljati procesom na zadovoljavajući način. Nakon opisa procesa nelinearnim modelom i prijenosnom funkcijom izvršena je analiza procesa grafoanalitičkim i analitičkim metodama u programu MATLAB na temelju kojih je zaključeno kakav je regulator potreban za postizanje zadovoljavajućih rezultata. Sinteza regulatora je obavljena pomoću krivulje mjesta korijena. Nelinearni model procesa je prikazan pomoću funkcijskih blokova u Simulink programu pomoću kojih se vršila simulacija sustava upravljanja. Rezultati simulacija ukazuju na to da je sustav upravljanja uspješno projektiran. Main problem this paper dealt with was synthesis of control system which will control the process in a satisfactory manner. After describing the process with nonlinear model and transfer function graphoanalytical and analytical analysis was performed to determine what type of controller was necessary to achieve desired results. Controller synthesis was carried out using root locus method and control system simulation was done with nonlinear Simulink model of the process. Results have shown that control system was designed successfully.