Analysis of induced voltages on metal fences under transmission power line

Cilj ovog diplomskog rada je ukazati potencijalne opasnosti koje se stvaraju oko metalnih masa u neposrednoj blizini dalekovoda i načine smanjenja tih opasnosti. Unutar trećeg poglavlja su objašnjeni načini kojima dalekovod utječe na metalnu masu u svojoj blizini. Kako inducirani napon na metalnoj masi i nastala elektromagnetska polja ne smiju stvoriti opasnost za ljudsko zdravlje, inducirani naponi i elektromagnetska polja moraju zadovoljiti određene norme i pravilnike. Propisane pravilnike i norme te utjecaj elektromagnetskih polja na ljudsko zdravlje su prikazani unutar četvrtog poglavlja. Primjenom softverskog alata XGSlab napravljen je model mreže s dvosistemskim 400 kV dalekovod koji na svojem koridoru prelazi preko metalne ograde. Šesto poglavlje ovog rada opisuje parametre mreže, model mreže i rezultate simulacije za oba slučaja rada dalekovoda, slučaj normalnog rada i slučaj kratkog spoja. Kraj ovog rada donosi zaključak gdje se analiziraju i opisuju rezultati simulacija nastalih smetnji na metalnoj ogradi.The aim of this master’s thesis is to raise awareness of potential dangers that arise around metallic objects in the immediate vicinity of transmission lines and principles to reduce these hazards. Within the third chapter, there is explanation of methods how transmission lines interference with nearby metallic objects. Since the induced voltage on the metallic objects and the resulting electromagnetic fields must not create a danger to human health, induced voltages and electromagnetic fields must meet with certain norms and regulations. The prescribed regulations and norms and the impact of electromagnetic fields on human health are presented within the fourth chapter. Using the XGSlab software, a grid model was made with a double circuit 400 kV transmission line that passes over a metal fence on its corridor. The sixth chapter of this paper describes the grid parameters, grid model and simulation results for both cases of transmission line operation, the case of normal operation and the case of short circuits. The end of this paper contain conclusion where the results of simulations of the resulting disturbances on the metal fence are analyzed and described