Modelling and the analysis of the power system harmonics in the simulation interface

U prvom dijelu rada objašnjeno je što su to harmonici, kako nastaju, te koje su štetne posljedice harmonika za elemente elektroenergetskog sustava. Također, opisano je i softversko sučelje DIgSILENT Power Factory u kojem je obavljeno modeliranje i analiza viših harmonika. Analizom harmonika u mreži IEEE 30 Bus System izračunati su THD-ovi za sve čvorove u mreži ukoliko je mreža napajana iz sinkronih generatora, statičkih generatora ili kombinirano napajanje iz obaju vrsta generatora. Provedena je i analiza spektara harmonika kako bi se utvrdilo zadovoljavaju li dobiveni rezultati normu EN 50160 Europske unije.The first part of this graduate thesis explains what these harmonics are, how they are produced, and what are the harmful consequences of the harmonics for the elements of the power system. Also, the sofware interfece of DIgSILENT Power Factory was described, in which modeling and analysis of higher order harmonics are performed. By analyzing the harmonics in the IEEE 30 Bus System, THDs are calculated for all nodes in the grid if the grid is powered by synchronous generators, static generators, or combined power from both types of generators. An analysis of the harmonics spectrum was also conducted to determine the obtained results complied with EN 50160 standard of the European Union