Ferro-Resonance Analysis of Capacitor Voltage Transformer with Fast Saturation Damper

With the increase in capacitor voltage transformer (CVT) operation life, CVT impedance changes, and short-time switching of overhead lines, it is very easy to cause a transient oscillation accident which participates, reduce insulation level CVT, even induce regional power grid easily breakdown, after long-term with defects. In this paper, whole network, including generator, grid, consumer, modeled, theoretical model ferro-resonance connected built. The frequency spectrum analysis, measurements resonance bus line voltage, were carried out find design method fast saturation damper (FSD) its voltage–current characteristics that affect vibration, based on theory practice; paper puts forward effective measures effect operation, avoid system.