Document Type



Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence


2. ENGINEERING AND TECHNOLOGY, Electrical and electronic engineering

Publication Details

Published in: IEEE Transactions on Dielectrics and Electrical Insulation ( Volume: 25, Issue: 1, Feb. 2018 )


The different phase resolved partial discharge patterns, which can be recognized when a positive dc voltage containing a ripple due to a half-wave rectification is used are presented in this paper. Results are given from corona onset to the appearance of breakdown streamers. The outcomes are five different patterns, which represent the four stages of positive corona and their transition zones. Three of them are clearly identifiable with respect to patterns from other discharge sources that have already been reported for dc voltages containing a ripple. For an assessment of pattern formation discharge pulses as recorded at the test object are presented. Finally, the appearance of patterns is explained with support of the measured discharge pulses and the underlying physical processes.