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This paper presents simulation and experiments of UHF detection for partial discharge (PD) in power transformers. Simulations of PD electromagnetic waves propagating in simulated transformer tank, by finite difference time domain (FDTD) approach, were implemented to examine the effects of electromagnetic wave refraction and reflection by transformer components. Actual PD experiments in simulation...
With the improvement of voltage level of HVDC transmission, the insulation of converter transformer has become increasingly prominent. Different from the general power transformer, valve side windings on converter transformer withstand pulsating voltages, which makes insulation problem get more serious. In this paper, experiments were carried out under pulsating voltage over a wide range of the pulsating...
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