Tracking, erosion and thermal distribution of micro-AlN + nano-SiO(2) co-filled silicone rubber for high-voltage outdoor insulation
| Autor: | Muhammad Tariq Nazir, Bao Toan Phung, Shihu Yu, Yuanyuan Zhang, Shengtao Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
erosion
insulator testing silicon compounds silicone rubber aluminium compounds nanocomposites filled polymers leakage currents III-V semiconductors combined co-filled particles thermal degradation thermal distribution high-voltage outdoor insulation polymeric insulators key insulation failure modes co-filled silicone rubber composites tracking-erosion model tracking voltage method physical tracking thermal depolymerisation power delivery networks nanosilica particles IEC 60587 micron-AlN filled composites thermal accumulation leakage current secondary electron collision size 20.0 nm voltage 3.0 kV time 240.0 min size 5 mum to 10 mum AlN-SiO(2) Electrical engineering. Electronics. Nuclear engineering TK1-9971 Electricity QC501-721 |
| Zdroj: | High Voltage (2018) |
| Druh dokumentu: | article |
| ISSN: | 2397-7264 |
| DOI: | 10.1049/hve.2018.5033 |
| Popis: | Thermal depolymerisation induced tracking and erosion of polymeric insulators is one of the key insulation failure modes and this process adversely affects the reliability of power delivery networks. This study reports the tracking, erosion and thermal distribution of micron-AlN and micron-AlN + nano-SiO(2) co-filled silicone rubber composites. A tracking-erosion model is presented to explain how the co-filled set of particles directly affects such mechanisms. Aluminium nitride (AlN: 5–10 μm) and silica (SiO(2): 20 nm) particles were procured for fabricating test samples. The inclined plane test according to IEC 60587 was carried out using tracking voltage method 2 with an initial applied voltage of 3 kV and a ramping rate of 0.25 kV/h over the duration of 240 min. Measurement results show co-filled composites exhibit significantly lower physical tracking and erosion as compared to micron-AlN filled composites. Thermal accumulation and average leakage current in co-filled composites are found noticeably lower than micron-filled counterparts. Moreover, the increased surface area of the combined co-filled particles in the composites provides better scattering and reduce secondary electron collision. This may impede the release of high energy causing thermal degradation. |
| Databáze: | Directory of Open Access Journals |
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