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Polymeric nanocomposite materials have shown a big potential for an impact in wire wound rotating machine stator insulation. Small wire wound machines, in fact, have a mainly organic stator winding insulation which is easily degraded by partial discharge (PD) activity. In this kind of equipment, then, the presence of PD activity leads to failure in a very short time. Nanofilled polymeric materials,...
Partial discharge (PD) pattern recognition and interpretation is still often the key to assess the presence and the nature of defects inside electrical insulation. In the case of external PD source, as when surface partial discharges are concerned, the PD pattern can be strongly influenced by the environmental conditions. This work presents the experimental outcome of a PD measurement campaign performed...
It is well known that organic enamels commonly used for the insulation of the wires used in the windings of low voltage electrical machines can suffer premature failures due to the degradation induced by partial discharges (PD) activity. Nanocomposite polymers can represent an innovative and powerful solution to this problem as they can provide an enhanced resistance to the action of PDs at a competitive...
The present work concerns the partial discharge (PD) activity in simple insulating system (twisted pairs) when switching voltage waveforms are applied. A special low frequency PD coupling system allowed to determine two quantities indicating the stress actually connected with the PD activity. Such parameters have been considered to determine life prediction models
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