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In the case of the continuous development of UHV engineering, the field intensity and spatial charge in gas are important parameters to reflect the electromagnetic environment of transmission lines. The study of the relevance between field intensity and spatial charge is not only helpful to better understand the mechanism of corona discharge, but also can provide support for the development and construction of UHV engineering. In this paper, A device that incorporates the ultrasonic pulse method is constructed to measure the distribution of spatial charge in corona cage. At the same time, the corona formation characteristics and the distribution law of electric field intensity are obtained through theoretical calculation and experimental measurement, and then the correlation mechanism between charge and initial electrical field intensity is established. The results show that when corona discharge occurs, the charge density in the cage has positive correlation with the initial voltage and negatively correlated with the initial electric field. The above research results can more accurately reveal the correlation mechanism between the spatial charge and the field intensity, which has crucial role for the stable operation of UHV engineering.

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Study on the Relationship Between Space Charge and Corona Initiation Characteristics Around DC Wire

  • 会议论文

  • 发表日期：

    2025年

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  • Haitao Wu,
  • Penghao Wang,
  • Tian Zhao,
  • Yuxiang Wang,
  • Gaohui He,
  • Hongbo Liu

摘要

In the case of the continuous development of UHV engineering, the field intensity and spatial charge in gas are important parameters to reflect the electromagnetic environment of transmission lines. The study of the relevance between field intensity and spatial charge is not only helpful to better understand the mechanism of corona discharge, but also can provide support for the development and construction of UHV engineering. In this paper, A device that incorporates the ultrasonic pulse method is constructed to measure the distribution of spatial charge in corona cage. At the same time, the corona formation characteristics and the distribution law of electric field intensity are obtained through theoretical calculation and experimental measurement, and then the correlation mechanism between charge and initial electrical field intensity is established. The results show that when corona discharge occurs, the charge density in the cage has positive correlation with the initial voltage and negatively correlated with the initial electric field. The above research results can more accurately reveal the correlation mechanism between the spatial charge and the field intensity, which has crucial role for the stable operation of UHV engineering.