抄録
Very Fast Transient Overvoltages (VFTO) comprising oscillating waveform generate a voltage oscillation in transformer windings. The behavior of the voltage oscillation has been shown experimentally using actual transformer windings. An interturn traveling wave is generated at either end of the coil and propagates along the winding. A resonance phenomenon is found, probably due to the superposition of the traveling waves.
In this paper, the voltage oscillation is thrown light on using simple 2- and 4-coil models. Effect of capacitive voltage distribution in the windings are discussed in relation to the traveling waves. The simulation of the voltage oscillation is performed using multi-conductor transmission line model in which the capacitive voltage distribution and the traveling waves are considered. A good agreement between the analysis and the experiment is shown in the interturn voltage at application of a pulse.
