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Breakdown Voltage and Its Influencing Factors of Thermal-aged Oil-impregnated Insulating Paper Under Pulsating DC Voltage
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Degui YAO1, Yang ZHANG1, Feipeng WANG2, Jingliang HUANG2, Zhongzhao JING3, Zhongbin LÜ1
Insulating Materials | 2021, 54(5) : 78 - 84
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Insulating Materials | 2021, 54(5): 78-84
• Insulation Technology •
Breakdown Voltage and Its Influencing Factors of Thermal-aged Oil-impregnated Insulating Paper Under Pulsating DC Voltage
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Degui YAO1, Yang ZHANG1, Feipeng WANG2, Jingliang HUANG2, Zhongzhao JING3, Zhongbin LÜ1
Affiliations
  • 1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
  • 2School of Electrical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
  • 3State Grid Henan Electric Power Company Zhengzhou Power Supply Company, Zhengzhou 450000, China
Published: 2021-05-20 doi: 10.16790/j.cnki.1009-9239.im.2021.05.012
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Firstly, oil-impregnated insulating papers with different ageing states were prepared, and their breakdown voltages under pulsating DC voltage were measured and compared with AC and DC breakdown voltage. The polymerization degree, moisture content, mesopore distribution, and crack characteristics of oil-impregnated insulating papers were measured to explore the possible influencing factors of breakdown voltage under different ageing states. The results show that the AC breakdown voltage is the smallest, and the pulsed DC breakdown voltage (r=1/5) is the largest before failure of oil-impregnated insulating papers. During thermal ageing process, the breakdown voltage fluctuates occasionally or even increases. Compared to AC breakdown voltage, the breakdown voltage under DC and pulsed DC voltages (r=1/5 and 1/3) shows opposite trends with ageing time. The water content and oil absorption capacity of oil-impregnated insulating papers, and the damage to the paper structure are the reasons causing the breakdown voltage to change with ageing time, but the importance of reasons vary with the ageing state.

breakdown voltage  /  pulsating DC voltage  /  thermal ageing  /  oil-impregnated insulating paper
Degui YAO, Yang ZHANG, Feipeng WANG, Jingliang HUANG, Zhongzhao JING, Zhongbin LÜ. Breakdown Voltage and Its Influencing Factors of Thermal-aged Oil-impregnated Insulating Paper Under Pulsating DC Voltage[J]. Insulating Materials, 2021 , 54 (5) : 78 -84 . DOI: 10.16790/j.cnki.1009-9239.im.2021.05.012
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doi: 10.16790/j.cnki.1009-9239.im.2021.05.012
  • Receive Date：2020-07-15
  • Online Date：2026-03-03
  • Published：2021-05-20
Article Data
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History
  • Received：2020-07-15
  • Revised：2020-09-07
Funding
Affiliations
    1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
    2School of Electrical Engineering, State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
    3State Grid Henan Electric Power Company Zhengzhou Power Supply Company, Zhengzhou 450000, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2021.05.012
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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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Genus		 种数
Number of
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Percentage of total
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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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