Simulation of the Effect of Ion Migration Rate Increase and Fluctuations on Streamer Branching in Insulating Oil

IF 3.1 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Dielectrics and Electrical Insulation Pub Date : 2025-01-09 DOI:10.1109/TDEI.2025.3527963

Haochen Zuo;Zhengyong Huang;Chaofan Wang;Jian Li

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引用次数: 0

Abstract

Plasma in liquids is widely used in material processing, aerospace, medicine, and other fields. The study of discharge behavior in liquid dielectrics can reveal the formation mechanism of plasma at the physical level. This article presented a mathematical model that considers ion migration rate increase and electron mobility as well as the random fluctuation characteristic of ion. Our study is completed with finite element analysis (FEA), and theoretically study the inception and propagation of streamers in insulating oil. The results show that the morphology of streamer from the improved equations are consistent with experimental results, effectively presenting the propagation process of streamers at different voltages. The direction of the streamer branches will shift, and new branches appears in the initial branch head in the process of streamer propagation. Besides, the propagation velocity of the branch head is higher than the propagation velocity of the streamer tail. Additionally, the macroscopic size of the streamer is positively correlated with the voltage amplitude, with the highest ion density near the needle tip. This study can provide certain theoretical reference for the safe operation of power equipment.

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离子迁移速率的增加和波动对绝缘油流线分支影响的模拟

液体等离子体广泛应用于材料加工、航空航天、医药等领域。对液体介质放电行为的研究可以在物理层面上揭示等离子体的形成机制。本文提出了一个考虑离子迁移速率增加和电子迁移率以及离子随机涨落特性的数学模型。本研究采用有限元分析方法，从理论上研究了浮波在绝缘油中的产生和传播。结果表明，改进方程得到的流光形态与实验结果一致，有效地反映了不同电压下流光的传播过程。在流传播过程中，流分支的方向会发生偏移，在初始分支头中出现新的分支。此外，分支头的传播速度高于拖尾的传播速度。此外，流线的宏观尺寸与电压幅值呈正相关，在针尖附近离子密度最高。本研究可为电力设备的安全运行提供一定的理论参考。

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来源期刊

IEEE Transactions on Dielectrics and Electrical Insulation 工程技术-工程：电子与电气

CiteScore

6.00

自引率

22.60%

发文量

309

审稿时长

5.2 months

期刊介绍： Topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use.