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Power frequency breakdown characteristics of CF3SO2F mixtures under non-uniform electric field
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Shizhuo HU1, 2, Wenjun ZHOU2, Yun LUO1, Yujing HUANG1, Rui QIU2
Insulating Materials | 2023, 56(12) : 128 - 135
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Insulating Materials | 2023, 56(12): 128-135
• Advanced Electrical Materials for Large Capacity Offshore Wind Power Transmission •
Power frequency breakdown characteristics of CF3SO2F mixtures under non-uniform electric field
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Shizhuo HU1, 2, Wenjun ZHOU2, Yun LUO1, Yujing HUANG1, Rui QIU2
Affiliations
  • 1School of Intelligent Manufacturing, Nanning College for Vocational Technology, Nanning 530008, China
  • 2School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Published: 2023-12-20 doi: 10.16790/j.cnki.1009-9239.im.2023.12.017
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The power frequency breakdown voltages of a new eco-friendly insulation CF3SO2F/N2 and CF3SO2F/CO2 mixtures were measured under sphere-sphere and needle-plate electrodes. The effects of pressure, electrode spacing, and electric field non-uniformity on the power frequency breakdown characteristics of the CF3SO2F mixtures were analyzed and compared with SF6. The results show that under slightly non-uniform electric field, the power frequency breakdown voltage of CF3SO2F mixtures is linearly related to pressure, and the breakdown voltage show weak saturation trend with the increase of electrode spacing. Under extremely non-uniform electric field, the power frequency breakdown voltages of CF3SO2Fmixtures exhibits "hump" curves of "rising-falling-rising" as the pressure increases, and the corresponding pressure of "hump" peak is between 0.2 MPa and 0.35 MPa. The overall power frequency breakdown strength of the CF3SO2F/N2 mixture is greater than that of the CF3SO2F/CO2 mixture. At 0.3 MPa and above, CF3SO2F/N2 mixtures can maintain a highly insulation level relative to SF6 under extremely non-uniform electric fields, which has good application potential.

CF3SO2F mixtures  /  non-uniform electric field  /  breakdown characteristics  /  "hump" phenomenon
Shizhuo HU, Wenjun ZHOU, Yun LUO, Yujing HUANG, Rui QIU. Power frequency breakdown characteristics of CF3SO2F mixtures under non-uniform electric field[J]. Insulating Materials, 2023 , 56 (12) : 128 -135 . DOI: 10.16790/j.cnki.1009-9239.im.2023.12.017
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Year 2023 volume 56 Issue 12
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doi: 10.16790/j.cnki.1009-9239.im.2023.12.017
  • Receive Date：2023-07-31
  • Online Date：2025-11-24
  • Published：2023-12-20
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  • Received：2023-07-31
  • Revised：2023-09-25
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    1School of Intelligent Manufacturing, Nanning College for Vocational Technology, Nanning 530008, China
    2School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
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Citations
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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