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直流电缆绝缘电场分布研究

Investigation on the Distribution of Electric Field in the Insulation of DC Cable

Electrical Engineering and Technology / 2020,1(3): 71-81 / 2020-07-02 1458 1906

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• Authors: 朱智恩* 杨黎明 李栋 高凯 曾浩 陈龙啸 马一力 王传博 江贞星
• Information:

  南瑞集团有限公司（国网电力科学研究院有限公司），南京

• Keywords:
  Gauss law; DC cable; Distribution of electric field; Resistivity
  高斯定理; 直流电缆; 电场分布; 电阻率
• Abstract: The theory of the distribution of electric field in the insulation of DC cable is investigated based on Gauss law, and the expression of the electric field is acquired in this paper. The distribution of electric field is investigated for the real ±200 kV and ±320 kV DC cables based on the distribution theory. The influence of resistivity on the electric field in insulation of DC cable is analyzed, and the relationship between DC electric field and AC electric field of the cable insulation is studied. It indicated that the position of the maximum field is changed from the outer insulation to the inner insulation, and the distribution of DC field and AC field tends to be consistent with the increasing of resistivity. 本文以高斯定理为基础，研究了全新的直流电缆绝缘电场分布理论，提出了表达关系式。基于分布理论，研究了实际的直流电缆绝缘中的电场分布。分析了电阻率对直流电缆绝缘电场分布的影响，并探索了电缆绝缘的交、直流电场分布联系。结果表明，随着电阻率增加，直流电缆绝缘最大电场位置由内变外，并且电缆绝缘的直流电场分布与交流电缆分布趋于一致。
• DOI: https://doi.org/10.35534/eet.0103011
• Cite: 朱智恩，杨黎明，李栋，等．直流电缆绝缘电场分布研究［J］．电气工程与技术，2020，1（3）：71-81．