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基于变权与区间数-集对分析理论的电缆中间接头状态评估

陈嘉杨, 彭显刚   

  1. 广东工业大学 自动化学院, 广东 广州 510006
  • 收稿日期:2023-06-30 出版日期:2024-05-25 发布日期:2024-06-17
  • 通信作者: 彭显刚(1964-),男,教授,硕士,主要研究方向为电力系统分析,E-mail:epxg@gdut.edu.cn E-mail:epxg@gdut.edu.cn
  • 作者简介:陈嘉杨(1999-),男,硕士研究生,主要研究方向为电力设备在线监测,E-mail:939326117@qq.com
  • 基金资助:
    南方电网公司科技项目(030600KK52210023)

Condition Assessment of Cable Intermediate Joint Based on Variable Weight and Interval Number-set Pair Analysis Theory

Chen Jia-yang, Peng Xian-gang   

  1. School of Automation, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2023-06-30 Online:2024-05-25 Published:2024-06-17

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摘要： 针对电缆接头状态信息以及评估等级边界的动态性和随机性问题，提出基于变权与区间数-集对分析理论的电缆中间接头绝缘状态评估方法。提取电缆接头局部放电特征参数作为状态评估指标，并对指标数据进行区间表示。引入方差和标准差来衡量指标区间数据的波动性，进而赋予指标的客观权重；对于局部放电指标劣化不均衡的问题，综合考虑指标的劣化程度与趋势参数，构建相应的状态变权函数从而得到变权权重。最后应用区间数与集对分析耦合方法，依据最大综合联系期望值确定电缆接头的状态等级。通过对某地10 kV电缆中间接头的在线监测数据进行算例分析，验证了该状态评估方法的有效性和可行性。

关键词: 电缆接头, 区间数, 集对分析, 变权, 状态评估

Abstract: For the randomness and dynamics problem of condition information and evaluation level boundary in the cable joint, an insulation state evaluation method of cable intermediate joint based on variable weight and interval number-set pair analysis theory is proposed. The partial discharge characteristic parameters of cable joint are extracted as the state evaluation index, and the index data are expressed in intervals. The variance and standard deviation are introduced to measure the volatility of the interval data of each index, and then the objective weight of the index is given. For the problem of unbalanced deterioration of partial discharge indicators, the corresponding state variable weight function is constructed to obtain the variable weight by comprehensively considering the deterioration degree and trend parameters of the indicators. Finally, the coupling method of interval number and set pair analysis is applied to obtain the state level of cable joint according to the expectation of comprehensive connection. By analyzing the online monitoring data of a 10 kV cable intermediate joint, the validity and feasibility of the state evaluation method are verified.

Key words: cable joint, interval number, set pair analysis, variable weight, state assessment

中图分类号: 

  • TM41
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