交联聚乙烯电缆绝缘诊断方法研究

Research on an Insulated Diagnosis Method of Cross-linked Polyethylene Cables

交联聚乙烯(Cross Linked Polyethylene,XLPE)电缆已在城网改造与建设过程广泛应用,但其在送电过程中会受到外界诸如电、热、机械力等不利因素影响,及时掌握其绝缘状态可避免引发事故。采用将模糊理论应用绝缘状态诊断中,建立电缆模糊绝缘综合评估模型,同时引入相对劣化度概念,使得该模型的模糊诊断矩阵更贴近电缆实际劣化情况。算例分析表明了模糊绝缘综合评估模型的有效性。

Cross-linked polyethylene cables have been widely used in urban grid renewal and constraction. But they can be affected by many unfavourable factors during power transmission. The paper applys fuzzy theory to insulation state di- agnosis, setting up the overall estimated model of the cable fuzzy insulation. Meanwhile, relative degeneration concept has been introduced, making the model fuzzy diagnosis matrix more clase to practical degeneration condition. The example shows availability of the overall estimated model of the fuzzy insulation.