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Rapid evaluation method of oil-paper insulation damp condition based on grey correlation and time-frequency domain dielectric response
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Huanmin YAO1, Haibao MU1, Daning ZHANG1, Kui MA2, Yao LIU2
Insulating Materials | 2023, 56(3) : 54 - 60
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Insulating Materials | 2023, 56(3): 54-60
• Insulation Technology •
Rapid evaluation method of oil-paper insulation damp condition based on grey correlation and time-frequency domain dielectric response
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Huanmin YAO1, Haibao MU1, Daning ZHANG1, Kui MA2, Yao LIU2
Affiliations
  • 1State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
  • 2State Grid Ningxia Power Supply Company, Yinchuan 750000, China
Published: 2023-03-20 doi: 10.16790/j.cnki.1009-9239.im.2023.03.009
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The equivalent extended Debye model of oil-paper insulation in the damp state no longer has linear characteristics, which makes the evaluation method of oil-paper insulation based on time-frequency conversion have errors. In this paper, the advantages of time domain and frequency domain dielectric spectroscopy were integrated, and the grey correlation algorithm was used to construct the evaluation model of oil-paper insulation damp condition on the basis of the time and frequency domain dielectric response parameters. Firstly, oil-paper insulation samples with different moisture content were prepared, and the influence of moisture and temperature on the polarization and depolarization current (PDC) and frequency domain spectroscopy (FDS) curves was analyzed. Furthermore, the characteristic parameters of PDC and FDS curves under different damp conditions were extracted. On this basis, the grey correlation algorithm was used to integrate the time and frequency domain dielectric characteristic parameters of oil-paper insulation to obtain its standardized reference vector. Finally, the accuracy of evaluation model was verified by laboratory sample data and field transformer data, which provides a new method for warning and diagnosis of transformer early fault.

oil-paper insulation  /  time and frequency domain conversion  /  grey correlation  /  damp and temperature  /  fault diagnosis
Huanmin YAO, Haibao MU, Daning ZHANG, Kui MA, Yao LIU. Rapid evaluation method of oil-paper insulation damp condition based on grey correlation and time-frequency domain dielectric response[J]. Insulating Materials, 2023 , 56 (3) : 54 -60 . DOI: 10.16790/j.cnki.1009-9239.im.2023.03.009
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Article Info
doi: 10.16790/j.cnki.1009-9239.im.2023.03.009
  • Receive Date：2022-01-13
  • Online Date：2025-11-21
  • Published：2023-03-20
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  • Received：2022-01-13
  • Revised：2022-03-09
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    1State Key Laboratory of Electrical Insulation and Power Equipment, Xi′an Jiaotong University, Xi′an 710049, China
    2State Grid Ningxia Power Supply Company, Yinchuan 750000, China
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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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