electrical trees and their growth in silicone rubber at various voltage frequencies
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ID: 159924
2018
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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.
| Reference Key |
zhang2018energieselectrical
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|---|---|
| Authors | ;Yunxiao Zhang;Yuanxiang Zhou;Ling Zhang;Zhongliu Zhou;Qiong Nie |
| Journal | acs combinatorial science |
| Year | 2018 |
| DOI |
10.3390/en11020327
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| URL | |
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