基于模糊评价法的电缆主动检修新策略

Research and Application of the New Strategy of Proactive Cable Maintenance Based on Fuzzy Evaluation

针对电缆数量庞大且检修覆盖能力有限的问题,研究了基于模糊评价的电缆绝缘状态主动检修新策略。以敏感度系数和影响程度为指标,评估了运行年限、敷设方式、负荷类型及长度与电缆绝缘状态之间的相关性;使用信息熵来量化系统的无序程度,构建基于互信息法的权重系数分配方法,得到了检修急迫性指数评价指标;通过某故障电缆的典型应用案例,确认了多层次模糊综合评估模型的可信度。实际应用结果表明,所提方法可以客观地评估电缆绝缘状态,为电缆的检修急迫性提供了参考依据。

In response to the issue that cables normally have a large number and their limited maintenance coverage capabilities are limited,a new proactive maintenance strategy for cable insulation status based on fuzzy evaluation is studied.The correlation between operating years,laying methods,load types,and lengths with the cable insulation status is assessed using sensitivity coefficients and influence degrees as indicators;information entropy is used to quantify the degree of disorder in the system,and a weight coefficient allocation method based on the mutual information method is constructed to obtain an index for evaluating the urgency of maintenance;the credibility of the multi-level fuzzy comprehensive evaluation model is confirmed through a typical application case of a faulty cable.The actual application results show that the proposed method can objectively evaluate the insulation status of cables,providing a reference basis for the urgency of cable maintenance.