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Influence of natural ester insulating oil on main insulation performance of 220 kV power transformer
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Ying YANG1, 2, Jianmin WANG1, 2, 3, Zhenbin DU1, 2, 3, Mingyuan MA3, Yajie ZHANG3, Xinran LI1, 2
Insulating Materials | 2024, 57(2) : 65 - 71
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Insulating Materials | 2024, 57(2): 65-71
• Insulation Technology •
Influence of natural ester insulating oil on main insulation performance of 220 kV power transformer
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Ying YANG1, 2, Jianmin WANG1, 2, 3, Zhenbin DU1, 2, 3, Mingyuan MA3, Yajie ZHANG3, Xinran LI1, 2
Affiliations
  • 1State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
  • 2Key Laboratory of Electro-magnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin 300130, China
  • 3Hebei Province Key Laboratory of Electromagnetic and Structural Performance of Power Transmission and Transformation Equipment, Baoding Tianwei Baobian Electric Co., Ltd., Baoding 071056, China
Published: 2024-02-20 doi: 10.16790/j.cnki.1009-9239.im.2024.02.009
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In order to analyze the influence of natural ester insulating oil on the insulation performance of high-voltage transformer, in this study, a 220 kV power transformer was taken as the research object, the wave process calculation was carried out on it to obtain the node potential and oil channel gradient voltage under the full wave of lightning impact. And the electric field distribution under power frequency and full wave voltage of lightning was obtained by establishing a calculation model of transformer main insulation electric field, and then the insulation margin was calculated. The results show that the main insulation margin of natural ester insulating oil transformer is large at power frequency, while it is small at full wave of lightning. By improving the insulation structure of natural ester insulating oil transformer, the main insulation distance between medium voltage and high voltage windings of the natural ester insulating oil transformer is reduced by about 6%; the minimum insulation margin under the full wave of lightning can be increased by 15% by increasing the insulation thickness and radius of the winding turn, and the cost is saved effectively.

natural ester insulating oil transformer  /  wave process  /  main insulation electric field  /  insulation margin  /  structure optimization
Ying YANG, Jianmin WANG, Zhenbin DU, Mingyuan MA, Yajie ZHANG, Xinran LI. Influence of natural ester insulating oil on main insulation performance of 220 kV power transformer[J]. Insulating Materials, 2024 , 57 (2) : 65 -71 . DOI: 10.16790/j.cnki.1009-9239.im.2024.02.009
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2024.02.009
  • Receive Date：2023-02-16
  • Online Date：2025-12-22
  • Published：2024-02-20
Article Data
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History
  • Received：2023-02-16
  • Revised：2023-03-20
Funding
Affiliations
    1State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China
    2Key Laboratory of Electro-magnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology, Tianjin 300130, China
    3Hebei Province Key Laboratory of Electromagnetic and Structural Performance of Power Transmission and Transformation Equipment, Baoding Tianwei Baobian Electric Co., Ltd., Baoding 071056, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2024.02.009
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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
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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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