The effects of the distribution pattern of multiple voids within LDPE on partial discharge characteristics

In this paper, the authors have investigated effects of the arrangement of the voids in LDPE insulation samples on PD characteristics, such as the phase-related magnitude of PD and the number of discharges. The differences of the PD patterns may be attributed to the arrangements of the voids. They have also employed available statistical operators, such as discharge factor and cross correlation factor, in order to analyze the PD characteristics. They conclude that partial discharge characteristics show quite different patterns due to the arrangements of voids in spite of the same size. Their experimental results suggest that it is important to know the arrangements of the multiple voids as well as to obtain the information about the number of defects in the insulators.