Experimental investigation of high frequency voltage oscillation in transformer windings

Computation of Very Fast Transient Overvoltages in Transformer Windings

“…The calculations are made to two transformers for which the measurements are published in [4] and [6]. For transformer A, a single sinusoidal pulse of 2 MHz and amplitude of 15 V is used.…”

“…The system of (5) can be represented in matrix form (6) The description of the matrix elements is given in the Appendix. In this way, we can determine the constants and , and the voltages and currents at the beginning of each coil.…”

3-MV compact very fast transient overvoltage generator for testing ultra-high-voltage gas-insulated switchgear

“…Many studies have shown that the VFTO waveform consists of three oscillatory components [10], [11]. The first component is low amplitude, low frequency in the range of hundreds of kilohertz, which comes about due to the capacitance of the GIS.…”

Evaluation of surge-transferred overvoltages in distribution transformers

“…For example in Ref. [1], it was reported that the amplitude of the inter-turn voltage can reach 0.25 times the applied sinusoidal voltage at resonance frequency.…”