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000000253 037__ $$aENY-ARTICLE-2008-199
000000253 041__ $$aeng
000000253 100__ $$aWiszniewski, A$$uWroclaw University of Technology
000000253 245__ $$aUltrasaturation Phenomenon in Power Transformers—Myths and Reality
000000253 260__ $$c1981-12-12
000000253 500__ $$aIEEE Trans. on Power Delivery, 23(3), pp. 1327 - 1334 
000000253 520__ $$aIn this paper, the ultrasaturation phenomenon of power transformers during their energization is studied. It is shown that under special conditions, the currents observed after transformer switching on do not contain enough restraining information (e.g., second harmonic), which may lead to protection maloperation. This paper concentrates on a thorough explanation of the problem and possible causes of ultrasaturation. Theoretical investigations are supported and illustrated with simulation studies performed both with MATLAB and Electromagnetic Transients Program–Alternative Transients Program. The outcomes of this research can further be used as hints for substation operation personnel as well as for the development of new protection stabilization criteria, which is not discussed further in this paper.
000000253 6531_ $$aHarmonic restraint
000000253 6531_ $$atransformer protection
000000253 6531_ $$atransient analysis
000000253 6531_ $$aultrasaturation
000000253 700__ $$aRebizant, W$$uWroclaw University of Technology
000000253 700__ $$aBejmert, D$$uWroclaw University of Technology
000000253 700__ $$aSchiel, L$$uSiemens AG, PTD EA, Berlin, Germany
000000253 8560_ $$fleon99@pwr.wroc.pl
000000253 8564_ $$uhttp://zet10.ipee.pwr.wroc.pl/record/253/files/$$zAccess to Fulltext
000000253 909CO $$ooai:zet10.pwr.wroc.pl:253$$pglobal
000000253 980__ $$aARTICLE