@inproceedings{FilipovićGrčićFrolovJurisicetal., author = {Filipović-Grčić, Bozidar and Frolov, Mikhail and Jurisic, Bruno and Manthe, Thomas and Matveev, Daniil and Rahimpour, Ebrahim}, title = {Consideration of Non-Standard Overvoltages Compared with Standard Overvoltages in Power Transformers}, series = {6th International Colloquium Transformer Research and Asset Management, Split, Croatia}, booktitle = {6th International Colloquium Transformer Research and Asset Management, Split, Croatia}, abstract = {Overvoltages that exist in the power system differ from the standard overvoltages (OVs) waveshape, that are used to test power equipment. In the paper typical OV waveshapes that occurs in the power system are analyzed, using the methods available in the literature: frequency domain severity factor (FDSF), time domain severity factor (TDSF) and the method from IEC 60071-2: 2018, Annex I. General remarks about applicability of these methods are given in the paper. It can be concluded that without the knowledge of transformer design and dielectric strength of an insulation system elements, the reliable estimation of non-standard overvoltages severity cannot be made. The results of the paper are in line with the conclusion of CIGRE WG A2.63: Transformer Impulse Testing.}, language = {en} }