Automatic voltage control in the electrical power system

U ovome je radu objašnjena potreba za upravljanjem elektroenergetskim sustavom (EES), te je dan kratak pregled vrsta upravljanja u EES-u. Prvi dio rada daje pregled vrsta regulacija u EES-u, te su navedene prednosti i nedostaci pojedinih razina regulacije s naglasakom na regulaciju napon. Kako bi se projektirao regulator napona izveden je linearni matematički model sinkronog generatora i njegovog uzbudnika, što je prikazano u drugom dijelu rada. Pri tome su detaljno opisane sljedeće komponente sustava: sinkroni generator, uzbudnik i regulator napona. Analizirana je dinamika generatora povezanog na EES-a kako bi se odredila vrsta regulacijske staze regulatora napona generatora, te su projektirani i PI regulator. U trećem dijelu rada izrađen je simulacijski model sustava te je provjerena kakvoća regulacije korištenih regulatora napona. Simulacija je provedena u programskom paketu Matlab/Simulink. The need for voltage and reactive power control of the electric power system is explained in this paper. The first section describes the type of regulation in the electric power system and gives overview of advantages and disadvantages of different levels of control, with emphasis placed on voltage control. In order to design the voltage regulator, a linear mathematical model of synchronous generator and its exciter is given, which is presented in the second section, where the following system components are described in detail:a synchronous generator, an exciter and voltage control. The dynamics of the generator connected to the power system were analyzed to determine the type of control path of the generator voltage control, and the and the PI controller were designed. In the third section, a simulation model of the system was developed and the quality of the used voltage controller was checked. The simulation was performed in Matlab/Simulink software.