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| Pressure resistance characteristics of natural ester insulating oil-paper system at low temperature |
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| DOI：10.12166/j.zgyz.1003-7969/2020.02.010 |
| KeyWord:natural ester insulating oil insulated cardboard low temperature breakdown voltage |
| FundProject:国网山东省电力公司科技项目(2018A-007) |
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| Abstract: |
| In order to study the pressure resistance characteristics of natural ester insulating oil, modified natural ester insulating oil and their insulating oil-paper system at low temperature,the pressure resistance test was carried out on soybean oil-based natural ester insulating oil, palm oil-based modified natural ester insulating oil, and their insulating oil-paper systems at -20 -10 ℃. The results showed that the breakdown voltage curve of the two natural ester insulating oils and the corresponding oil-paper systems were U-shaped with the temperature changing at -20-10 ℃. The minimum breakdown voltage distributed within the temperature range of -10-0 ℃. The minimum breakdown voltage of palm oill-based modified natural ester insulating oil corresponds to a slightly lower temperature than soybean oil-based natural ester insulating oil. The breakdown voltage fluctuation range of insulating oil-paper system was much smaller than that of pure insulating oil and was relatively stable. |
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