Method and device for quickly eliminating ferromagnetic resonance of voltage transformer

A device for quickly eliminating ferromagnetic resonance of a voltage transformer, comprising a collection unit, a calculation unit, and a detection and resonance elimination unit, wherein:

• the collection unit collects a three-phase voltage secondary value and an open-delta voltage of a voltage transformer in real time;
• the calculation unit receives measured data of the collection unit, and calculates a flux linkage ψ0 corresponding to a zero-sequence voltage in real time according to the three-phase voltage secondary value or the open-delta voltage collected in real time;
• and
• the detection and resonance elimination unit receives the measured and calculated data of the collection unit and the calculation unit, and when detecting that ferromagnetic resonance occurs in the voltage transformer, further checks whether the absolute value of the flux linkage corresponding to the zero-sequence voltage or the absolute value of the open-delta voltage respectively falls within a set range, if yes, triggers a silicon controlled rectifier resonance elimination loop connected in parallel to both ends of an open-delta winding of the voltage transformer to be quickly turned on, to eliminate ferromagnetic resonance, and if not, does not trigger the silicon controlled rectifier resonance elimination loop to be turned on.