Mitigating Ferroresonance in Voltage Transformers in Ungrounded MV Networks

Verification tests of a novel ferroresonance detection technique

“…This way the damping circuit is only connected under ferroresonance situation and its impact on the efficiency of the installation is reduced. Within this field of ferroresonance detection, there are currently three main lines of research, depending on the criteria used to detect this phenomenon: saturation analysis [5,[10][11], overvoltage analysis [12][13] and current/voltage waveform analysis [2][3]14].…”

Ferroresonance suppression in power transformers using chaos theory

“…A novel analytical solution to the fundamental ferroresonance including power frequency excitation characteristic has been investigated in detail in [13]. A method of protecting the voltage transformer against ferroresonance overvoltages with a compact active load has been developed by [14]. The static VAR compensator (SVC) and the thyristor-controlled series capacitor (TCSC) analytical model, a systematical method for suppressing ferroresonance at neutral-grounded substations and the frequency response of the unfiled power flow controller (UPFC) has been simultaneously studied in [15].…”

Continuous wavelet transform for ferroresonance phenomena in electric power systems

“…Also, the abnormal rates of harmonics and transient or steady-state over-voltages can often be dangerous for most electrical equipments in the power systems [10,11]. Therefore, in the related literature, the ferroresonance is defined as a general term applied to a wide variety of interactions between capacitors and iron-core inductors that result in unusual voltages and/or currents [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18].…”