Fractal character of DC trees in polymethylmethacrylate

Fujii, Masaharu; Watanabe, Makoto; Kitani, Isamu; Arii, Kiyomitsu; Yoshino, Katsumi

doi:10.1109/14.108154

Cited by 48 publications

(15 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4b), where field enhancement occurs only near to the tip of the propagating channel. The experimental results of Fujii et al [18] confirms to the fact that the electrical tree generated under positive DC voltage have few side branches and a long main channel.…”

Section: Resultssupporting

confidence: 77%

Influence of homo- and heterocharges on the growth dynamics of electrical trees

Sarathi¹,

Anilkumar²,

Jayaganthan³

2004

Materials Letters

View full text Add to dashboard Cite

Section: Resultssupporting

confidence: 77%

Influence of homo- and heterocharges on the growth dynamics of electrical trees

Sarathi¹,

Anilkumar²,

Jayaganthan³

2004

Materials Letters

View full text Add to dashboard Cite

“…It has been found that the voltage required for DC treeing is generally lower under positive DC voltages than under negative DC voltages [9,10]. This is normally attributed to the effect of polarity dependent space charge distribution in front of tree tips.…”

Section: Discussionmentioning

confidence: 99%

Electrical treeing in a glassy epoxy resin — The filamentary tree and the PD tree

Zheng

Rowland

2017

2017 IEEE Conference on Electrical Insulation and Dielectric Phenomenon (CEIDP)

View full text Add to dashboard Cite

Abstract-Two types of electrical trees have been observed to grow in a glassy epoxy resin of needle-plane geometry under 50 Hz AC voltage. They differ in their constituent channel radii and the associated partial discharge activity. The so-called 'filamentary tree' has finer channels and much smaller discharge magnitudes than the 'PD tree'. This work describes an electrical treeing process containing a clear transition from filamentary tree growth to PD tree growth with associated changes to partial discharge measurements. Apart from emphasizing the importance of recognizing tree channel thickness, it provides experimental evidence for an electro-mechanical treeing process in which filamentary channel propagation is followed by enlargement of the channel radius by partial discharges. Moreover, the PD characteristics during the transient stage are assessed. The magnitude of partial discharges during the transition stage was found to be polarity dependent.

show abstract

“…It is also observed that XLPE cables at low temperature have higher AC and impulse breakdown strength [11]. Kosaki et al, observed that tree initiation voltage with LDPE insulation at low temperature is six times higher than at room temperature [12]. Treeing studies in XLPE insulating material under AC and DC voltage is well known in the literature [13,14].…”

Section: Introductionmentioning

confidence: 92%