Insulating System of Power Transformers

U radu je dan kratki uvod u energetske transformatore. Objašnjene su Maxwellove jednadžbe kao teorijska podloga. U praktičnom djelu rada modeliran je u programskom alatu „ElecNet“ željeni promatrani dio transformatora a to je granica visokonaponskog i niskonaponskog namota te kapa. Mjesto proučavanja je rub niskonaponskog djela i unutarnji rub kape. Predmet rada je podjela ruba kape na dva djela i variranje pripadajuća dva radijusa. Polje je numerički i grafički snimano na mjestima proučavanja. Na djelu na kojem nije mijenjan radijus uočena je promjena ujednačavanja, dok je na kapi uočen pomak vršne vrijednosti prema radijusom dodrinoj osi kape. Zaključak rada jest da se električno polje u složenoj geometriji ravna u ovisnosti o udaljenosti razlike potencijala, što smo znali, ali i o obliku te međusobnom geometrijskom odnosu tih oblika.The paper gives a brief introduction to the power transformers. Explains the Maxwell equations as theoretical background. In the practical part of the work is modeled, in the programming tool ElecNet, considered part of the transformer which is the limit of the low-voltage winding and the high-voltage cap. The place of studying has been the edge of low-voltage part and the inside edge of the cap. Radii of the cap were varied in five sequence. The field was recorded numerically and graphically. At the place on which has not been altered radius was observed changes in equalization, while on the cap the drops observed shift of peak value to the line where radii meet. The conclusion is that the electric field in the complex geometry, depends on the distance of the potential diffrence, what we already knew, and the geometry as well as the mutual relation of those shapes