ELECTROMAGNETIC FIELD CALCULATION OF TRANSFORMER STATION 400/110 kV ERNESTINOVO USING THE CDEGS SOFTWARE

Srete Nikolovski - Predrag Marić - Zoran Baus

   This paper presents calculations of the electric and magnetic fields of complex busbars, transformers and transmission line structures at the transmission power station 400/110 kV Ernestinovo. By constructing and bringing the TS 400/110 kV Ernestinovo in operation, it was expected that electric and magnetic fields would arise within and outside the fence of the transformer station. The fundamental sources of low frequency electromagnetic fields in the TS Ernestinovo are the primary elements of the 400 and 110 kV open substations as well as the connected 400 kV and 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 calculation and analysis of the electromagnetic field. Calculations 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.

Keywords: electric field, magnetic field, transformer station, electromagnetic compatibility, moment method, computer program

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