| 杨涛.植物绝缘油低温性能的改进[J].中国油脂,2021,46(9):67~70.[YANG Tao.Improvement of low temperature performance of vegetable insulating oil[J].China Oils and Fats,2021,46(9):67~70.] |
| 植物绝缘油低温性能的改进 |
| Improvement of low temperature performance of vegetable insulating oil |
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| DOI： |
| 中文关键词: 植物绝缘油 低温性能 倾点 结晶分提工艺 降凝剂 |
| 英文关键词:vegetable insulating oil low temperature performance pour point crystallizing fractionation process pour point depressant |
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| 中文摘要: |
| 为提高植物绝缘油变压器的低温运行可靠性，采用结晶分提和添加降凝剂相结合的方法对植物绝缘油低温性能进行改进研究。结果表明，结晶分提工艺可以有效改善植物绝缘油的低温特性，且不影响植物绝缘油的原有性能，低温养晶过程中搅拌速度为5 r/min时，植物绝缘油倾点可降至-19.5 ℃。丙烯酸酯高聚物不具有降凝效果，而且还会对植物绝缘油电气绝缘性能造成影响。聚甲基丙烯酸酯降凝效果优于聚α烯烃，添加比例为1%时可将结晶分提处理后的植物绝缘油倾点降至-26.3 ℃，且能保持良好的理化、电气性能，进一步拓宽了植物绝缘油变压器的应用条件和应用范围。 |
| 英文摘要: |
| In order to improve the low temperature operation reliability of vegetable insulating oil-immersed transformer, the low temperature performance improvement experiment of vegetable insulating oil was studied by combining crystallizing fractionation and adding pour point depressant. The results showed that crystallizing fractionation process could effectively improve the low temperature performance of vegetable insulating oil, and did not affect the original performance. When the stirring speed reached 5 r/min during the low temperature crystallization, the pour point of vegetable insulating oil could be reduced to -19.5 ℃. Acrylate polymer had no depression effect, and could affect the electrical performance of vegetable insulating oil. The depression effect of polymethacrylate was better than that of poly-α-olefin, and when the addition ratio of polymethacrylate was 1%, the pour point of vegetable insulating oil treated by crystallization fractionation could be reduced to -26.3 ℃, and the good physicochemical and electrical properties were maintained, which further expanded the application conditions and scope of the vegetable insulating oil-immersed transformer. |
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