METHOD AND DEVICE FOR FAST ELIMINATION OF FERROMAGNETIC RESONANCE OF VOLTAGE TRANSFORMER Russian patent published in 2021 - IPC H01F27/42 H02H7/05 H02H9/00 G01R15/18 

FIELD: electrical engineering.

SUBSTANCE: invention relates to the electrical equipment. Method of fast elimination of ferromagnetic resonance of voltage transformer includes: at first removal of values of three-phase voltage and voltage of circuit of open triangle of voltage transformer; calculation of flux linkage corresponding to zero sequence voltage by means of a single algorithm; and when occurrence of ferromagnetic resonance in the coil of mutual inductance is detected, additionally checking, whether the absolute value of flux linkage corresponding to the zero sequence voltage, or the absolute value of voltage of the open triangle circuit, respectively, into the set range, and, if so, triggering secondary resonance elimination circuit to eliminate resonance. Also disclosed is a corresponding device for fast elimination of ferromagnetic resonance of a voltage transformer. Method and device accurately analyze and control the resonance elimination starting time.

EFFECT: technical result consists in increase in efficiency and rapid elimination of ferromagnetic resonance.

13 cl, 2 dwg