证据理论与模糊理论集成的XLPE电缆绝缘状态评估研究

为提高XLPE电缆的绝缘诊断精度,提出了多绝缘参数综合评估方法。针对D-S证据理论中各证据体可信度分配难以确定的问题,建立了证据理论与模糊理论集成的XLPE电缆绝缘状态综合评估模型。此模型将模糊理论中的模糊集合与隶属度函数概念引入证据理论,利用隶属度函数构造证据理论的合理信度函数分配。在此基础上,通过证据理论联合每个证据体的可信度从而形成最终的电缆绝缘状态评估结果。实例分析表明该模型可有效评估XLPE电缆的绝缘状态,具有一定的理论和实用价值。

Research on insulation assessment of XLPE cables based on evidence and fuzzy theory integrated method

To improve insulation diagnosis accuracy of XLPE cables, the idea of comprehensive insulation evaluation based on multiple parameters is proposed. A evidence fusion diagnosis model based on fuzzy theory is established which uses fuzzy set and membership function to construct the distribution of reliability function of evidence theory and effectively solve the difficulty of determining reliability allocation of each evidence, on the basis of the model, evidence theory combines the credibility of each evidence to form the final insulation assessment result. Example analysis shows that the proposed model can effectively estimate the insulation of XLPE cables, and has a certain theoretical and practical value.