Measurements and computation of electromagnetic field in transformer station 400/110 kV ernestinovo

This paper presents results of measurements and computations of the electric and magnetic fields of complex busbars, transformers and transmission line structures at transformer station 400/110 kV. The fundamental sources of low frequency electromagnetic fields in the transformer station are the primary elements of the 400 and 110 kV open substations and associated 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 of the electromagnetic field. Measurements were performed by EMS 100 field meter and 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 measured values and permissible levels according to Croatian regulations. Measurements were performed for real working conditions for twelve different profiles in the transformer station.