均匀电场作用下矿物绝缘油中颗粒相互作用分析及互偶极子作用力建模

doi:10.19595/j.cnki.1000-6753.tces.242036

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Abstract The formation of small bridge by dielectric impurity particles in insulating oil under the action of electric field is the key factor that leads to the decrease of insulation performance. When the distance between dielectric particles is relatively close, the polarization interaction force is significant, which greatly affects the electric field distribution around dielectric particles and the chain process of particles in oil. The particle chain process and its morphological change are important factors affecting the distortion of electric field and partial discharge in transformer insulation oil. However, the mechanism by which the interaction between particles affects their motion is not well understood, and there is a lack of effective models for analyzing the interaction forces. Therefore, an experimental platform was established to study the effect of dielectric particle interaction on particle motion in insulating oil.
In the experiment, the electric field is uniform, and the field direction is changed to simulate the electric field in different directions. Dielectric particles are replaced by wooden balls and fixed with extremely fine cotton thread. The influence of their interaction on the particle chain process is mainly studied. The experimental results show that when the direction of the applied electric field is parallel to the line connecting the center of the particles, the particles attract each other and form a chain under the action of the electric field. However, when the direction of the external electric field is perpendicular to the line connecting the particle center, there will be a special “self-rotation” phenomenon in the process of the particle translation movement along the electric field line to form a chain, that is, the special motion mode of “attraction-self-rotation-chain”. However, the classical point dipole interaction model cannot explain and describe this special experimental phenomenon. Therefore, the process of particle interaction is considered in this paper, and the equivalent idea of self-dipole and mutual-coupling dipole polarization of particles under the action of electric field is proposed. On this basis, a model of mutual-coupling dipole interaction considering particle interaction is established, and the analytical expressions of particle self-dipole moment and mutual-coupling dipole moment are obtained, and the relationship between particle radius and “mutual-coupling dipole moment” is established.
The mutual-coupling dipole model is used to represent the result of particle interaction by the offset of the mutual-coupling dipole away from the center of the sphere, and successfully explains the “attraction- self-rotation-chain” phenomenon caused by particle interaction, that is, the particle self-rotation mechanism is the essential reflection of the interaction torque formation in the electric field environment. The self-rotation experiment of a three-particle system fully proves the validity of the concept of coupled dipoles in the analysis of the interaction force between particles. At the same time, the mutual-coupling dipole model can realize the quantitative calculation of particle interaction force and torque under different electric field angles and particle R. The calculation results show that when two particles have the same particle radius and particle spacing D is between 0.1R and 0.5R (D and R is the distance between the particles and the particle radius, respectively), there is a significant interaction force between particles, and the particle interaction force is inversely proportional to the particle spacing and proportional to the particle radius. The above analysis model provides a new method for analyzing the interaction behavior of particles in the electric field environment and optimizing the electric field in the insulating oil.

Key words： Insulating oil dielectric particle polarization dipole moment mutual-coupling dipole model interaction between particles

Received: 13 November 2024

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	Bao Yanyan
	Zhang Jialin
	Chen Wei
	Wen Dingjun
	Liu Kang

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Bao Yanyan,Zhang Jialin,Chen Wei等. Analysis of Particle Interactions and Modeling of Mutual-Coupling Dipole Forces in Mineral Insulating Oils under Uniform Electric Fields[J]. Transactions of China Electrotechnical Society, 2025, 40(23): 7724-7736.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.242036 OR https://dgjsxb.ces-transaction.com/EN/Y2025/V40/I23/7724

[1] 林智勇, 李荣华, 黄国泰, 等. 基于频域二次微分解谱法的油纸绝缘等效电路参数辨识[J]. 电工技术学报, 2025, 40(15): 4966-4975.
Lin Zhiyong, Li Ronghua, Huang Guotai, et al.Identification of dielectric response equivalent circuit of transformer’s oil-paper insulation based on quadratic differential decomposition spectroscopy of frequency domain spectroscopy[J]. Transactions of China Electro-technical Society, 2025, 40(15): 4966-4975.
[2] Butcher M, Neuber A A, Cevallos M D, et al.Conduction and breakdown mechanisms in transformer oil[J]. IEEE Transactions on Plasma Science, 2006, 34(2): 467-475.
[3] Kalantar A, Levin M.Factors affecting the dissolution of copper in transformer oils[J]. Lubrication Science, 2008, 20(3): 223-240.
[4] 刘云鹏, 赵家莹, 刘贺晨, 等. 低频电压下含纤维素颗粒变压器油绝缘特性及影响因素[J]. 电工技术学报, 2024, 39(4): 1198-1207.
Liu Yunpeng, Zhao Jiaying, Liu Hechen, et al.Insulation characteristics and influencing factors of transformer oil containing cellulose particles under low-frequency voltage[J]. Transactions of China Electrotechnical Society, 2024, 39(4): 1198-1207.
[5] 刘道生, 周春华, 丁金, 等. 变压器纳米改性油纸复合绝缘研究综述[J]. 电工技术学报, 2023, 38(9): 2464-2479, 2490.
Liu Daosheng, Zhou Chunhua, Ding Jin, et al.Research overview of oil-paper composite insulation modified by nano particles for transformer[J]. Transactions of China Electrotechnical Society, 2023, 38(9): 2464-2479, 2490.
[6] 田文锐, 任慧敏, 杨定乾, 等. 低温环境下油浸绝缘纸介电响应特性与温度归一化研究[J]. 电工技术学报, 2025, 40(11): 3630-3642.
Tian Wenrui, Ren Huimin, Yang Dingqian, et al.Study of dielectric response characteristics and temperature normalization of oil-paper insulation in low temperature[J]. Transactions of China Electro-technical Society, 2025, 40(11): 3630-3642.
[7] 张国治, 闫伟阳, 王堃, 等. 流动绝缘油中纤维杂质颗粒运动特性仿真研究[J]. 电工技术学报, 2023, 38(9): 2500-2509.
Zhang Guozhi, Yan Weiyang, Wang Kun, et al.Simulation research on movement characteristics of fiber impurity particles in flowing insulating oil[J]. Transactions of China Electrotechnical Society, 2023, 38(9): 2500-2509.
[8] 张宁, 王鹏, 刘智捷, 等. 流-电耦合场中金属颗粒群的荷电计算及影响因素研究[J]. 电工技术学报, 2024, 39(17): 5534-5544.
Zhang Ning, Wang Peng, Liu Zhijie, et al.Study on the charge calculation and influencing factors of metal particle groups in fluid-electric coupling field[J]. Transactions of China Electrotechnical Society, 2024, 39(17): 5534-5544.
[9] Ciuriuc A, Notingher P V, Jovalekic M, et al.Experimental study on vegetable and mineral trans-former oils properties[C]//2014 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM), Bran, Romania, 2014: 169-174.
[10] Yang Li jun, Sun Weidong, Gao Sihang, et al. Thermal aging test for transformer oil-paper insulation under over-load condition temperature[J]. IET Generation, Transmission & Distribution, 2018, 12(12): 2846-2853.
[11] 黄宇辰, 房俊龙, 闫伟阳. 不同电压类型下油流中纤维杂质颗粒运动特性仿真研究[J]. 高电压技术, 2022, 48(12): 4817-4828.
Huang Yuchen, Fang Junlong, Yan Weiyang.Simulation research on the motion characteristics of fiber impurity particles in oil flow under different voltage types[J]. High Voltage Engineering, 2022, 48(12): 4817-4828.
[12] 张宁, 刘士利, 郝建, 等. 变压器油中气泡杂质相局部放电特性研究综述[J]. 电工技术学报, 2023, 38(10): 2757-2776.
Zhang Ning, Liu Shili, Hao Jian, et al.Review on partial discharge characteristics of bubble impurity phase in transformer oil[J]. Transactions of China Electrotechnical Society, 2023, 38(10): 2757-2776.
[13] 李原, 张乔根, 赵毅. 直流电压下纤维小桥对油纸复合绝缘局部放电特性的影响[J]. 高电压技术, 2018, 44(11): 3611-3618.
Li Yuan, Zhang Qiaogen, Zhao Yi.Effect of cellulose bridge on characteristics of partial discharge in oil-paper insulation under DC voltage[J]. High Voltage Engineering, 2018, 44(11): 3611-3618.
[14] Lu Wu, Liu Qiang.Effect of cellulose particles on impulse breakdown in ester transformer liquids in uniform electric fields[J]. IEEE Transactions on Dielec-trics and Electrical Insulation, 2015, 22(5): 2554-2564.
[15] Pohl H A.The motion and precipitation of suspensoids in divergent electric fields[J]. Journal of Applied Physics, 1951, 22(7): 869-871.
[16] Zainoddin M H S, Zainuddin H, Aman A. Investigation of the dielectrophoresis effect on the electrical performance of dielectric liquid[J]. ARPN Journal of Engineering and Applied Sciences, 2017, 12(23): 7003-7007.
[17] 郝建, 但敏, 廖瑞金, 等. 颗粒属性对矿物绝缘油直流击穿特性的影响差异及原因分析[J]. 电工技术学报, 2019, 34(24): 5270-5281.
Hao Jian, Dan Min, Liao Ruijin, et al.Influence of particle properties on DC breakdown characteristics of mineral oil and its difference reason analysis[J]. Transactions of China Electrotechnical Society, 2019, 34(24): 5270-5281.
[18] 梁晨, 伍衡, 李原龙, 等. 油中碳颗粒对交直流复合电压下绝缘油击穿特性的影响[J]. 绝缘材料, 2018, 51(4): 21-27.
Liang Chen, Wu Heng, Li Yuanlong, et al.Effect of carbon particles on breakdown strength of insulating oil under AC/DC composite voltage[J]. Insulating Materials, 2018, 51(4): 21-27.
[19] Mahmud S, Chen G, Golosnoy I O, et al.Bridging in contaminated transformer oil under DC and AC electric field[J]. Journal of Physics: Conference Series, 2013, 472: 012007.
[20] 王有元, 李熙, 李原龙, 等. 交直流复合电压下铜颗粒在油中的分布及对绝缘油击穿特性的影响[J]. 电工技术学报, 2018, 33(23): 5581-5590.
Wang Youyuan, Li Xi, Li Yuanlong, et al.Distribu-tion of copper particle in insulating oil and its influence on breakdown strength of insulating oil under combined AC and DC voltage[J]. Transactions of China Electro-technical Society, 2018, 33(23): 5581-5590.
[21] 李金忠, 张乔根, 李原, 等. 直流电压下油纸绝缘杂质小桥的形成过程[J]. 高电压技术, 2016, 42(12): 3901-3908.
Li Jinzhong, Zhang Qiaogen, Li Yuan, et al.Generation process of impurity bridges in oil-paper insulation under DC voltage[J]. High Voltage Engineering, 2016, 42(12): 3901-3908.
[22] 付守海, 王淑娟, 王景春. 变压器油中导电颗粒运动轨迹的计算[J]. 现代电力, 1999, 16(2): 30-37.
Fu Shouhai, Wang Shujuan, Wang Jingchun.Calculation of particles moving traces in transformer oil[J]. Modern Electric Power, 1999, 16(2): 30-37.
[23] Krins M, Borsi H, Gockenbach E.Impact of carbon particles on the electrical strength of different solid/liquid interfaces in a non-uniform field[C]//Conference Record of the 1998 IEEE International Symposium on Electrical Insulation, Arlington, VA, USA, 1998: 623-626.
[24] 张明月, 刘浩琦, 曹辉, 等. 金属颗粒极化中场激发双电层的电荷和电场特征研究[J]. 物探化探计算技术, 2023, 45(4): 531-541.
Zhang Mingyue, Liu Haoqi, Cao Hui, et al.Study on the charge and electric field characteristics of field-induced electric double layer in metal particles polarization[J]. Computing Techniques for Geophysical and Geochemical Exploration, 2023, 45(4): 531-541.
[25] 郭硕鸿. 电动力学[M]. 3版. 北京: 高等教育出版社, 2008.
[26] 张嘉琳, 康永强, 蒲绪宏, 等. 双柱体系统局部电场计算的互偶极子模型[J]. 电工技术学报, 2024, 39(12): 3869-3883.
Zhang Jialin, Kang Yongqiang, Pu Xuhong, et al.The mutual-coupling dipole model in calculating the local electric field for two-cylinder system[J]. Transactions of China Electrotechnical Society, 2024, 39(12): 3869-3883.
[27] Kang Yongqiang, Zhang Jialin, Shi Zhipeng, et al.A new method for calculating the electric field distribution in particle-particle rotating systems[J]. Journal of Electrostatics, 2024, 132: 103967.