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Point discharge and arc characteristics of oil-pressboard insulation under switching impulse voltage and superimposing power frequency electrical stress
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Jingfeng WU1, Wensen WANG1, Bin DING1, Lu ZHANG1, Yanhua HAN1, Yi LI2, 3, Simeng LI2
Insulating Materials | 2023, 56(1) : 34 - 44
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Insulating Materials | 2023, 56(1): 34-44
• Insulation Technology •
Point discharge and arc characteristics of oil-pressboard insulation under switching impulse voltage and superimposing power frequency electrical stress
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Jingfeng WU1, Wensen WANG1, Bin DING1, Lu ZHANG1, Yanhua HAN1, Yi LI2, 3, Simeng LI2
Affiliations
  • 1Electric Power Research Insititute of Shaanxi Electric Power Company SGCC, Xi'an 710100, China
  • 2State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
  • 3School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, China
Published: 2023-01-20 doi: 10.16790/j.cnki.1009-9239.im.2023.01.007
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The key power equipment with the oil-pressboard insulation winding structure is prone to appear the problem of acetylene content exceeding the standard when putting into operation, and then partial discharge and arcing phenomena are produced. Therefore, the point discharge and arcing characteristics of oil-pressboard insulation were studied under switching impulse voltage and superimposing power frequency electrical stress. The discharge and arcing characteristics of different point defects were compared and analyzed, and the influence of the superimposed phase of impulse voltage and power frequency voltage was discussed. The results show that the arcing process of the defect model containing pressboard after breakdown can divide into high-frequency re-arcing stage, stable arcing stage, and re-arcing stage before the voltage restored. Among them, the high-frequency re-arcing stage has higher arcing frequency and lower recovery voltage. Under the switching impulse voltage, the pure oil gap defect model shows multiple breakdown, and the oil-pressboard composite insulation defect model shows that the pressboard breakdown directly and the oil pressboard breakdown successively, and the defect model type affects the discharge characteristics and arcing rule. The superposition phase affects the discharge characteristics and arcing law by affecting the electrical stress magnitude.

re-arcing  /  partial discharge  /  switching impulse voltage  /  reactor  /  transformer
Jingfeng WU, Wensen WANG, Bin DING, Lu ZHANG, Yanhua HAN, Yi LI, Simeng LI. Point discharge and arc characteristics of oil-pressboard insulation under switching impulse voltage and superimposing power frequency electrical stress[J]. Insulating Materials, 2023 , 56 (1) : 34 -44 . DOI: 10.16790/j.cnki.1009-9239.im.2023.01.007
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.01.007
  • Receive Date：2022-01-11
  • Online Date：2025-11-21
  • Published：2023-01-20
Article Data
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History
  • Received：2022-01-11
  • Revised：2022-03-23
Funding
Affiliations
    1Electric Power Research Insititute of Shaanxi Electric Power Company SGCC, Xi'an 710100, China
    2State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China
    3School of Physics & Information Technology, Shaanxi Normal University, Xi'an 710119, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2023.01.007
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表12种不同金属材料的力学参数
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Number of
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Number 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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