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Investigation on AC and DC Space Charge Characteristics of Oil-paper Insulation with Different Water Content
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Yuanxiang ZHOU1, 2, Lei XUE1, Xin HUANG2, Yunxiao ZHANG2, Chenyuan TENG2
Insulating Materials | 2022, 55(2) : 57 - 66
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Insulating Materials | 2022, 55(2): 57-66
• Insulation Technology •
Investigation on AC and DC Space Charge Characteristics of Oil-paper Insulation with Different Water Content
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Yuanxiang ZHOU1, 2, Lei XUE1, Xin HUANG2, Yunxiao ZHANG2, Chenyuan TENG2
Affiliations
  • 1The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, School of Electrical Engineering, Xinjiang University, Urumqi 830047, China
  • 2State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Published: 2022-02-20 doi: 10.16790/j.cnki.1009-9239.im.2022.02.008
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During the normal operation of converter transformer, moisture will cause the decline of the electrical performance of oil-paper insulation and accelerate its ageing, resulting in a decrease of life and insulation breakdown. In order to study the influence of moisture on the space charge characteristics and breakdown characteristics of oil-paper insulation under AC and DC composite voltage, we prepared oil-paper insulation samples with different water content, then we used space charge measurement under AC and DC composite voltage to get the influence of moisture content on the space charge characteristics of oil-paper insulation under the voltage forms of AC, DC, and AC and DC composite voltage, and studied the breakdown characteristics of samples with different moisture contents under different voltage types. The results show that the electric field distortion rate of oil-paper insulation under AC and DC composite voltage is greater than that under DC and under AC electric field; as the DC component increases, the increase amplitude of breakdown voltage of the samples with higher water content is significantly lower than that of samples with lower water content, and the electric strength of samples with low water content is more affected by the DC voltage component than that of samples with high water content.

water content  /  AC and DC composite  /  oil-paper insulation  /  space charge
Yuanxiang ZHOU, Lei XUE, Xin HUANG, Yunxiao ZHANG, Chenyuan TENG. Investigation on AC and DC Space Charge Characteristics of Oil-paper Insulation with Different Water Content[J]. Insulating Materials, 2022 , 55 (2) : 57 -66 . DOI: 10.16790/j.cnki.1009-9239.im.2022.02.008
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doi: 10.16790/j.cnki.1009-9239.im.2022.02.008
  • Receive Date：2021-03-10
  • Online Date：2025-12-22
  • Published：2022-02-20
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History
  • Received：2021-03-10
  • Revised：2021-05-03
Funding
Affiliations
    1The Wind Solar Storage Division of State Key Laboratory of Control and Simulation of Power System and Generation Equipment, School of Electrical Engineering, Xinjiang University, Urumqi 830047, China
    2State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2022.02.008
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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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