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Influence of rise time on partial discharge extinction voltage at semi-square voltage waveforms

Elisabeth Lindell (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Tord Bengtsson (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Jörgen Blennow (Institutionen för material- och tillverkningsteknik, Högspänningsteknik) ; Stanislaw Gubanski (Institutionen för material- och tillverkningsteknik, Högspänningsteknik)
IEEE Transactions on dielectrics and electrical insulation (1070-9878). Vol. 17 (2010), 1, p. 141-148.
[Artikel, refereegranskad vetenskaplig]

This work presents measurements of the partial discharge (PD) extinction voltage in three different types of test objects, using semi-square voltages with 2 mu s and 100 mu s rise time. A needle creating corona discharges, a twisted pair specimen commonly used for testing motor insulation and a paper/oil test object modelling the turn-to-turn insulation of a transformer winding were investigated, presenting extinction voltages between approximately 1 kV and 8 kV. For the twisted pair specimen the PD extinction voltage was significantly lower at the shorter rise time, whereas for the other test objects, just a small or no difference could be detected. The conclusion is that depending on what range of rise times and what insulation system that are studied, there may be an influence of the rise time of the applied voltage on the PD extinction voltage.

Nyckelord: Partial discharges; corona; enamel insulated wires; extinction voltage; oil impregnated insulation; square voltage waveform

Denna post skapades 2010-02-16. Senast ändrad 2015-07-01.
CPL Pubid: 112388


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Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Högspänningsteknik



Chalmers infrastruktur