Computation of Electromagnetic Field of Transformer Station 110/10(20) kV Using the CDEGS software

Abstract

This paper presents computations of the electric and magnetic fields of complex busbars, transformers and transmission line structures at transmission power station 110/10(20) kV. The fundamental sources of low frequency electromagnetic fields in the TS are the primary elements of the 110 kV open substations as well as connected 110 kV overhead lines. Due to the complexity of the geometry of the substation elements, it was necessary to apply a three-dimensional approach to the computation and analysis of the electromagnetic field. Computations of electromagnetic fields were conducted for quasi-static states of electrical values at a power frequency of 50 Hz. The calculated electric and magnetic fields were compared with permissible levels according to Croatian regulations. The maximum permissible levels for the electric field and magnetic flux density were found to be exceeded at some locations in the station.