There are a lot of quantitative performance characterisation methods for composite insulators. However, how to apply the characterisation methods with different dimensions to comprehensively assess the health state of composite insulators remains a big problem for operators and researchers. A comprehensive health assessment model for composite insulators based on the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) method is proposed in this study. Fourteen composite insulators from four regions in Yunnan Province, China, and five quantitative characterisation indicators of the insulators, namely hardness, hydrophobicity, loss of hydrophobicity, recovery of hydrophobicity, and trap charge, are selected to verify the model. The results show that the Pearson correlation coefficient of the TOPSIS-based comprehensive health score with operating time is 0.72, which is better than the other single indicator. By introducing the operating time into the TOPSIS-based model, we can also obtain the ageing resistance performance of the composite insulator. This work provides a new idea to assess the health state and ageing performance of composite insulators.

中文翻译：

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基于理想解相似度的架空输电线路复合绝缘子综合健康评价技术

复合绝缘子的性能定量表征方法有很多。然而，如何应用不同维度的表征方法来综合评估复合绝缘子的健康状态，仍然是运营商和研究人员面临的一大难题。本研究提出了一种基于与理想解相似的顺序偏好技术 (TOPSIS) 方法的复合绝缘子综合健康评估模型。选取云南省4个地区的14个复合绝缘子，以及绝缘子的硬度、疏水性、疏水性损失、疏水性恢复和陷阱电荷5个定量表征指标对模型进行验证。结果表明，基于TOPSIS的综合健康评分与手术时间的Pearson相关系数为0.72，优于其他单一指标。通过将运行时间引入基于TOPSIS的模型，我们还可以获得复合绝缘子的耐老化性能。该工作为评估复合绝缘子的健康状态和老化性能提供了新思路。