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Mixing Characteristics of Natural Ester and Mineral Insulating Oil
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Yang XU1, Xianan JIAO1, Weijia HUANG1, Xuzhao LIN1, Ting HU2, Weimin GUAN3
Insulating Materials | 2022, 55(1) : 19 - 23
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Insulating Materials | 2022, 55(1): 19-23
• Material Research •
Mixing Characteristics of Natural Ester and Mineral Insulating Oil
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Yang XU1, Xianan JIAO1, Weijia HUANG1, Xuzhao LIN1, Ting HU2, Weimin GUAN3
Affiliations
  • 1Guangzhou Power Supply Bureau of Guangdong Power Grid Co., Ltd., Guangzhou 510000, China
  • 2Wuhan ZD New Materials Co., Ltd., Wuhan 430074, China
  • 3Wuhan University, Wuhan 430072, China
Published: 2022-01-20 doi: 10.16790/j.cnki.1009-9239.im.2022.01.003
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In the application scenarios of natural ester insulating oil, the technology of using natural ester insulating oil to replace mineral insulating oil to prolong the service life of in-service old transformers has attracted extensive attention at home and abroad. During the oil replacing process, the residual mineral insulating oil in transformer will mix with the newly added natural ester insulating oil inevitably. In this study, the natural ester was mixed with mineral insulating oil, and its volume fraction was 0%, 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, respectively. The properties of the mixed oils were studied by accelerated thermal ageing tests at 100℃ for 168 h. The results show that with the increase of natural ester content, the degradation range of breakdown voltage of the aged oil decreases, and the effect of water content on the breakdown voltage of the aged oil decreases, while the acid value increases. When the volume fraction of the natural ester exceeds 30%, the dielectric loss factor of the aged oil is lower than that of the oil before ageing. When the volume fraction of mineral oil is 10%, the ignition point of the mixed oil is only 68.5% of that of natural ester.

natural ester  /  mineral oil  /  transformer  /  insulating oil  /  thermal ageing
Yang XU, Xianan JIAO, Weijia HUANG, Xuzhao LIN, Ting HU, Weimin GUAN. Mixing Characteristics of Natural Ester and Mineral Insulating Oil[J]. Insulating Materials, 2022 , 55 (1) : 19 -23 . DOI: 10.16790/j.cnki.1009-9239.im.2022.01.003
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2022.01.003
  • Receive Date：2021-01-25
  • Online Date：2025-12-23
  • Published：2022-01-20
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History
  • Received：2021-01-25
  • Revised：2021-04-07
Funding
Affiliations
    1Guangzhou Power Supply Bureau of Guangdong Power Grid Co., Ltd., Guangzhou 510000, China
    2Wuhan ZD New Materials Co., Ltd., Wuhan 430074, China
    3Wuhan University, Wuhan 430072, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.01.003
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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