Open AccessFluid simulation model and analysis of partial discharge characteristics of tip defects
Author(s) -
Zhenhua Xing,
Zhao Zhi-guo,
Xu Xing,
Li Zhao-fei,
Jun Ye,
Yuandong Guo
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/585/1/012133
Subject(s) - amplitude , streamer discharge , voltage , partial discharge , mechanics , electric discharge , electric field , radius , materials science , space charge , pulse (music) , phase (matter) , transformer , physics , electrode , optics , electron , computer security , quantum mechanics , computer science
The tip discharge is modeled and the micro discharge characteristics are studied. The hydrodynamic model of tip discharge in transformer oil is established. The development process of streamer discharge under pulse voltage is analyzed. The distribution of space charge density and space electric field under different pulse voltage amplitude and rising edge is obtained. The numerical results show that: with the increase of applied voltage amplitude, the average velocity of streamer development changes more significantly with the same discharge spacing; the steeper the rising edge pulse is, the faster the average discharge development speed is and the larger the discharge radius is. At the same time, according to the change law of streamer morphology development under AC voltage, the discharge frequency is less, the amplitude is higher, and the phase distribution is narrow when the applied voltage is positive half cycle. When the applied voltage is negative half cycle, the discharge times are more and the phase distribution is wide, and the tip discharge has obvious polarity effect.