| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Numerical simulation of corona in electrical equipment operated at high altitude |
| Yue Zhang(张跃)1,2, Zhou Huang(黄洲)1, Xue-Ming Shen(沈雪明)3, Gen-Bo Zhang(张根博)2, and Wen-Jun Ning(宁文军)3,† |
1 State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2 Dongfang Electric Machinery Co. Ltd., Deyang 618000, China;
3 College of Electrical Engineering, Sichuan University, Chengdu 610065, China |
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Abstract Corona discharge is a common form of electrical fault in power equipment. Studying corona at different altitudes is essential for ensuring reliable operation of electrical systems under varying environmental conditions. In this work, a Multiphysics simulation model of corona discharge was developed to investigate the discharge behavior and induced ionic wind characteristics under different air pressures. First, the accuracy of the simulation model was validated by experiments. At 1 bar (1 bar = 10$^5$ Pa), Trichel pulses with an amplitude of 1.1 mA and a repetition frequency of 250 kHz were observed, along with a maximum ionic wind velocity of 9.49 m/s in the discharge channel. When the pressure was reduced to 0.79 bar, the discharge was overall enhanced, with the Trichel pulse amplitude decreasing to 0.5 mA, the repetition frequency increasing to 760 kHz, and the induced ionic wind becoming stronger. Both the velocity within the channel and the gap increased with decreasing pressure. This study provided a theoretical reference for the deployment and operation of electrical equipment in high-altitude environments
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Received: 22 June 2025
Revised: 15 September 2025
Accepted manuscript online: 21 October 2025
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PACS:
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52.80.Hc
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(Glow; corona)
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52.65.-y
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(Plasma simulation)
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52.30.-q
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(Plasma dynamics and flow)
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| Fund: Project supported by DEC-SCU Joint Innovation Research Institute Project (Grant No. 24H1283) and the Key Research and Development Program of Xizang Autonomous Region (Grant No. XZ202403ZY0036). |
Corresponding Authors:
Wen-Jun Ning
E-mail: ningwj@scu.edu.cn
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Cite this article:
Yue Zhang(张跃), Zhou Huang(黄洲), Xue-Ming Shen(沈雪明), Gen-Bo Zhang(张根博), and Wen-Jun Ning(宁文军) Numerical simulation of corona in electrical equipment operated at high altitude 2026 Chin. Phys. B 35 075202
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