摘要
油纸绝缘系统的老化将产生大量的老化产物,油纸绝缘系统的介质响应变得更加复杂,此时,采用被广泛认同的扩展德拜等效模型不能真实反映油纸绝缘系统的弛豫过程。因此,综合现有等效电路模型的优点,在扩展德拜等效电路模型上引入能够真实反映界面极化特性的等效电路,提出一种能更加贴合油纸绝缘系统实际弛豫过程的混合极化电路模型,然后,给出混合极化电路模型的参数辨识方法,并通过吻合度法确定极化等效支路数。最后,通过实例分析和对比,证实混合极化电路模型的正确性及相比于扩展德拜等效电路模型具有更高的精度,且能够更加真实地反映油纸绝缘系统的弛豫过程。
With the aging of the o il-paper insulation sy s tem, the polarization responses would be more complex owing to a large number of aging products. In this case, the well known extended Debye model cannot reflect the relaxation process of the oil-paper insulation system actually. Therefore, a mixed polarization circuit model based on the equivalent circuit model and the extended Debye model is put forward. The proposed model can reflect the relaxation process of the oil-paper insulation system more actually. Secondly, the method for parameter identification is given, and the alignment method is adopted to confirm the branch number of the equivalent circuit. Finally, the results of example analysis and comparison confirm that the mixed polarization circuit model has higher accuracy than that of the ED equivalent circuit model , and the relaxation process of the insulation system is closer to the actual one.
出处
《电工技术学报》
EI
CSCD
北大核心
2016年第17期170-177,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金重点资助项目(61174117)
关键词
油纸绝缘
扩展德拜等效电路
混合极化电路
参数辨识
Oil-paper in su la t io n , extended Debye equivalent c ir c u i t , mixed polarization c ir c u i t , parameter iden-tification
