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Transformers are known as one of the most important equipment in power system transmission and distribution network. Safety of transformer insulation is determined mainly by its insulating oil dielectric strength. A major concern which threaten the withstand strength of a liquid insulation is the presence of particle contamination. One of the best methods to detect any abnormality and insulation weakness...
In this paper, the partial discharge current signals (pulses), along with pattern recognition methods for the assessment and diagnosis of PD (partial discharge) source of metal particles in the oil tank of the transformer is used. Three defect models, i.e.; a fixed metal particle, a free metal particle and a sharp metal particle is used for modeling all types of metal particles in the oil tank of...
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