Lightning protection safety operation assessment method of UHV AC substation based on probability theory of power system operation mode

Xiu-juan Chen, Jing Liu, Weidong Shi, Dengfeng Cheng, T. Lu, T. Lei
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Abstract

International standard IEEE P1862-2014, IEEE recommended practices for over-voltage and insulation coordination of transmission system at 1000kV AC and above, and Chinese national standard GB/Z24842-2018, over-voltage and insulation coordination of 1000kV UHVAC power transmission and transformation project, clearly stipulates that the probability of general operation mode and special operation mode should be considered when predicting over-voltage. However, how to reflect the probability of the above operation mode in the lightning protection safety evaluation index of UHV AC substation, the above standards did not give a clear quantitative method. In this paper, on the basis of the above specifications and considering the probability of power system operation mode, the lightning protection safety assessment method of UHV AC substation was comprehensively and deeply studied. Firstly, the probability statistics of general operation mode and special operation mode of UHVAC transmission system were carried out. The concept of probability coefficient was put forward for the first time, and the value of probability coefficient was suggested. Then, the lightning protection safety assessment method of UHV AC substation under general operation mode and special operation mode based on probability coefficient was proposed. Finally, the lightning protection safety evaluation standard of UHV AC substation was given. The research results can further improve the scientificity of lightning protection safety assessment of UHV AC substation, and have radiation effect and reference significance for lightning protection safety assessment of UHV AC substation.
基于电力系统运行模式概率论的特高压交流变电站防雷安全运行评估方法
国际标准IEEE p182 -2014《IEEE 1000kV交流及以上输电系统过电压和绝缘协调推荐实施规程》和中国国家标准GB/Z24842-2018《1000kV特高压输变电工程过电压和绝缘协调》明确规定,在预测过电压时应考虑一般运行模式和特殊运行模式的概率。然而,如何在特高压交流变电站防雷安全评价指标中体现上述运行方式的概率,上述标准并未给出明确的定量方法。本文在上述规范的基础上,考虑电力系统运行方式的概率,对特高压交流变电站防雷安全评估方法进行了全面深入的研究。首先,对特高压输电系统的一般运行模式和特殊运行模式进行了概率统计。首次提出了概率系数的概念,并对概率系数的取值提出了建议。然后,提出了基于概率系数的特高压交流变电站一般运行模式和特殊运行模式下的防雷安全评估方法。最后,给出了特高压交流变电站防雷安全评价标准。研究成果可进一步提高特高压交流变电站防雷安全评价的科学性,对特高压交流变电站防雷安全评价具有辐射效应和参考意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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