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1470 / 2020-09-29 17:52:02
Research on Safety Evaluation of Grounding Grids Based on Binary Interval Numbers
substation,binary interval number,assess safety,grey relational degree
Electrotechnical Theory and New Electromagnetic Technology
终稿
Yifan He / the Research Institute of State Grid Zhejiang Electric Power Limited Company
Chengyuan Liu / the Research Institute of State Grid Zhejiang Electric Power Limited Company
Jiayuan Hu / the Research Institute of State Grid Zhejiang Electric Power Limited Company
Hongpeng Xie / Chongqing university
With the overall advancement of UHV AC and DC lines and the gradual development of large cross-regional power grids, the effective grounding of power equipment plays an important role in the safe and stable operation of the power system. Regarding the numerical uncertainty caused by the measurement of grounding grid parameters, this paper proposes a multi-dimensional safety evaluation method for grounding grids based on the gray correlation degree of interval numbers. First, construct an evaluation index system and use the coefficient of variation to determine the index weight, avoiding the subjectivity brought about by expert empowerment. Second, determine the evaluation level and construct an interval number evaluation matrix. Then, the kernel density estimation is used to fit the interval number evaluation value into a probability density distribution. Finally, the final evaluation results are gotten by evaluating the weighted JS divergence between the probability density distribution and the optimal distribution. Through an empirical analysis of a 220kV substation in Zhejiang, the effectiveness of the method is verified.

 
重要日期

  • 会议日期

    11月02日

    2020

    至

    11月04日

    2020

  • 10月27日 2020

    初稿截稿日期

  • 11月03日 2020

    报告提交截止日期

  • 11月04日 2020

    注册截止日期

  • 11月17日 2020

    终稿截稿日期

主办单位
IEEE IAS Student Chapter of Huazhong University of Science and Technology (HUST)
承办单位
Huazhong University of Science and Technology
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