| Issue |
MATEC Web Conf.
Volume 356, 2022
2022 2nd International Conference on Advanced Energy, Power and Electrical Engineering (AEPEE2022)
|
|
|---|---|---|
| Article Number | 01002 | |
| Number of page(s) | 8 | |
| DOI | https://doi.org/10.1051/matecconf/202235601002 | |
| Published online | 14 March 2022 | |
Study on drying performance of high voltage cable buffer layer material
1
Wuhan Nari Limited Liability Company of State Grid Electric Power Research Institute Wuhan, China
2
State Grid Corporation of China Beijing, China
3
Shenzhen Power Supply Bureau Co., Ltd. Shenzhen, China
* Corresponding author: narizhangjing@foxmail.com
In order to study the failure mechanism of high-voltage cable buffer layer caused by moisture and the performance of the material after immersion and drying, according to the structure and size of 110 kV XLPE cable, the requirements for the separation distance between corrugated aluminum sheath and insulating outer shield before and after the change of buffer layer resistivity caused by moisture were calculated, the influence of moisture on ablation failure was analyzed. The test platform of buffer layer material was built, the properties of two kinds of materials without water immersion and after water immersion drying were tested, including semi-conductive buffer water-blocking tape and semi-conductive buffer tape. The results show that when the moisture content was large, the resistivity of the buffer layer increases, which reduces the requirements of the allowable separation distance of the cable, and was more likely to cause the discharge and ablation of the buffer layer. The water in the buffer layer was removed by drying at 70 °C, with thickness, weight, the water content, elongation at break, breaking strength and volume resistivity can be recovered, which verifies that the heating drying method is feasible for the removal of water from the buffer layer.
Key words: Cable / Buffer layer / Ablation / Water content / Drying process
© The Authors, published by EDP Sciences, 2022
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.