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为了对电力电缆状态检修提供决策支持,提出了一种基于改进雷达图理论的交联聚乙烯电力电缆运行状态综合评估模型。通过预防性电气试验、在线监测技术、设备缺陷及运行检修记录等途径获取电缆特征变量,建立了电缆运行状态综合评价指标体系。运用改进的层次分析法得到各项指标的权重值,在此基础上,对雷达图中各评估指标对应的扇形区域进行排序和角度分配,推导出了交联聚乙烯电力电缆运行状态综合评估和指标属性灵敏度计算公式。结合实际算例对电缆运行状态进行了定量评估分析,并与现有方法进行比较验证了该模型的正确性与优越性。
In order to provide decision support for power cable condition overhaul, a comprehensive evaluation model of operating status of XLPE power cable based on improved radar graph theory is proposed. Cable characteristic variables were obtained through preventive electrical tests, on-line monitoring techniques, equipment defects and operation and maintenance records, and a comprehensive evaluation index system for cable operation status was established. The weight of each index is obtained by improved analytic hierarchy process. On this basis, the rank and angle distribution of the fan-shaped area corresponding to each evaluation index in the radar chart is derived, and the comprehensive evaluation of the operating status of the XLPE power cable is derived Indicator property sensitivity calculation formula. Combined with practical examples, the cable running status was quantitatively evaluated and compared with the existing methods to verify the correctness and superiority of the model.