Electrical tree initiation

Shimizu, Noriyuki; Laurent, Christian

doi:10.1109/94.729688

Cited by 231 publications

(95 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An electrical tree may start to grow from a point of field enhancement (such as an asperity at the electrode-dielectric interface) or from a gaseous cavity [30]. For a tree to be initiated from a gaseous cavity, the PD activity in the cavity needs to be concentrated in a certain area.…”

Section: Tree Initiationmentioning

confidence: 99%

Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now

Morshuis

2005

IEEE Trans. Dielect. Electr. Insul.

257

109

View full text Add to dashboard Cite

The amount of literature on partial discharge (PD) and partial discharge induced degradation is vast. In the past 10 -20 years significant progress has been made on research within partial discharge induced aging of dielectrics. Researchers now agree on the main mechanisms pertaining to this topic. With the advent of a new generation of dielectrics of which many properties now can be affected by the introduction of small amounts of nano-sized particles it seems to be a good moment to review the progress on the understanding of PD induced aging. Focusing on internal partial discharge in solid polymeric insulation this paper tries to identify achievements and at the same time challenges still to be solved.

show abstract

Section: Tree Initiationmentioning

confidence: 99%

Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now

Morshuis

2005

IEEE Trans. Dielect. Electr. Insul.

257

109

View full text Add to dashboard Cite

show abstract

“…It is believed that electrons play a vital role in the electrical treeing initiation mechanism for polymers under AC voltages [4,11,23]. When in the negative half cycle, electrons drift into the insulating materials.…”

Section: Effects Of Voltage Frequency On Electrical Tree Initiationmentioning

confidence: 99%

“…Electrical trees are pre-breakdown phenomena that accelerate the occurrence of insulation failure [1][2][3][4][5][6][7]. Owing to the harsh working conditions of power electrical equipment, there have been many investigations to determine the influence of temperature, voltage type, voltage frequency, thermal aging, and moisture on electrical treeing characteristics [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Electrical Trees and Their Growth in Silicone Rubber at Various Voltage Frequencies

et al. 2018

View full text Add to dashboard Cite

Abstract:The insulation property at high voltage frequencies has become a tough challenge with the rapid development of high-voltage and high-frequency power electronics. In this paper, the electrical treeing behavior of silicone rubber (SIR) is examined and determined at various voltage frequencies, ranging from 50 Hz to 130 kHz. The results show that the initiation voltage of electrical trees decreased by 27.9% monotonically, and they became denser when the voltage frequency increased. A bubble-shaped deterioration phenomenon was observed when the voltage frequency exceeded 100 kHz. We analyze the typical treeing growth pattern at 50 Hz (including pine-like treeing growth and bush-like treeing growth) and the bubble-growing pattern at 130 kHz. Bubbles grew exponentially within several seconds. Moreover, bubble cavities were detected in electrical tree channels at 50 Hz. Combined with the bubble-growing characteristics at 130 kHz, a potential growing model for electrical trees and bubbles in SIR is proposed to explain the growing patterns at various voltage frequencies.

show abstract

“…As a consequence of this consumption, the increase in the carbonyl groups suggests the occurrence of a thermooxidative process. This illustrates that free radicals, which are known to have a very important role in the treeing initiation stage by causing repeated polymer chain scissions [10,11], are being formed during the thermal ageing process. By accumulation in the polymer matrix, the free radicals will trigger an auto-oxidation process, thus forming a micro-cavity which leads to the appearance of a rapidly growing tree channel.…”

Section: -General View Of the Wire -Plane Test Object With Dimensionsmentioning

confidence: 99%

The Effect of DC Electro-thermal Ageing on Electrical Treeing in Polyethylene

Mantsch¹,

Chen²,

Blennow³

et al. 2018

NORD-IS

View full text Add to dashboard Cite

Electrical treeing is among the main mechanisms responsible for electric breakdown in polymeric high voltage cables. In this paper, electrical treeing in electro-thermally aged low density polyethylene (LDPE) was evaluated by means of a real-time microscopic detection system. A wire -plane electrode test object with semiconducting tab was used in the study. The ageing was performed at a constant temperature of 80°C and an applied DC voltage of 10 kV of both polarities and lasted from 100 up to 800 hours. For testing the resistances to electrical treeing, tests were performed by applying 50 Hz AC voltage at a ramping speed of 0.5 kV/s. The obtained experimental results showed that mainly the thermal component of the ageing had an influence on electrical treeing parameters, namely on the initiation voltage as well as the shape and occurrence frequency of the trees. With an increase of the ageing time, the tree inception voltage gradually decreased.

show abstract

Electrical tree initiation

Cited by 231 publications

References 30 publications

Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now

Degradation of solid dielectrics due to internal partial discharge: some thoughts on progress made and where to go now

Electrical Trees and Their Growth in Silicone Rubber at Various Voltage Frequencies

The Effect of DC Electro-thermal Ageing on Electrical Treeing in Polyethylene

Contact Info

Product

Resources

About