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Aggregation Behaviors and Partial Discharge Characteristics of Metal Particles in Transformer Oil Under AC/DC Composite Voltage
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Manling DONG1, Xiaoshi KOU1, Degui YAO1, Yuhang YAO2, Wei WANG1, Yang ZHANG1, Ju TANG2
Insulating Materials | 2022, 55(10) : 74 - 79
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Insulating Materials | 2022, 55(10): 74-79
• Insulation Technology •
Aggregation Behaviors and Partial Discharge Characteristics of Metal Particles in Transformer Oil Under AC/DC Composite Voltage
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Manling DONG1, Xiaoshi KOU1, Degui YAO1, Yuhang YAO2, Wei WANG1, Yang ZHANG1, Ju TANG2
Affiliations
  • 1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
  • 2School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
Published: 2022-10-20 doi: 10.16790/j.cnki.1009-9239.im.2022.10.012
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The accumulation test of metal particles in oil between spherical electrodes under different ratios of AC/DC composite voltage was carried out, the partial discharge (PD) signals at different moments were collected simultaneously. And then the discharge frequency and average discharge quantity were counted, and the correlation between the aggregation behavior of metal particles and PD characteristics was analyzed. The results show that the accumulation area of metal particles under DC voltage is the largest, and the metal particles aggregated the most closely under 3:1 AC/DC composite voltage. The discharge frequency decreases with time, while gradually increases with the increase of AC component in AC/DC composite voltage. It is considered that the collision frequency between metal particles and electrodes and the closeness of particle accumulation are the main factors affecting the frequency of partial discharge and the average discharge quantity.

metal particles  /  transformer oil  /  aggregation characteristics  /  partial discharge  /  AC/DC composite voltage
Manling DONG, Xiaoshi KOU, Degui YAO, Yuhang YAO, Wei WANG, Yang ZHANG, Ju TANG. Aggregation Behaviors and Partial Discharge Characteristics of Metal Particles in Transformer Oil Under AC/DC Composite Voltage[J]. Insulating Materials, 2022 , 55 (10) : 74 -79 . DOI: 10.16790/j.cnki.1009-9239.im.2022.10.012
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doi: 10.16790/j.cnki.1009-9239.im.2022.10.012
  • Receive Date：2021-11-08
  • Online Date：2025-12-23
  • Published：2022-10-20
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  • Received：2021-11-08
  • Revised：2021-12-23
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Affiliations
    1Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450000, China
    2School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, 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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