应用电路分析法评估油纸绝缘变压器绝缘状态  

Application Circuit Analysis Method to Assess the State of Transformers Oil-paper Insulation

作　　者：陈嘉鹏[1] 江修波[1] 蔡金锭[1] 李安娜[1] 

机构地区：[1]福州大学电气工程与自动化学院,福州350108

出　　处：《电力系统及其自动化学报》2016年第2期30-35,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(61174117)

摘　　要：等值电路模型常用来辅助分析油纸绝缘劣化机理,因此该文主要针对等效电路模型进行研究。首先,将信息熵与粒子群混合算法运用到等值参数辨识中,并提出以极化谱吻合度来确定最能反映变压器绝缘状态的极化支路数。同时还探讨了不同时间常数对应的支路数与绝缘状态之间存在的关系。仿真结果表明,对同一台变压器,不同的支路数其极化谱吻合度不同;对不同运行年限的变压器,其极化支路数也不同,一般年限越久其绝缘状态越差,其支路数有增多的趋势;大、小时间常数支路数分别反映了绝缘纸和绝缘油的绝缘状况,绝缘状况越差,支路数也有增加的趋势。The equivalent circuit model is commonly used to assist in the analysis of the paper insulation degradation mechanism,so this paper mainly research the equivalent circuit model. Firstly,the mixture of information entropy and the particle swarm algorithm is applied to the equivalent parameter identification,and put forward with polarization spectrum alignment to determine the most reflect to the polarization state of transformer insulation condition. Meanwhile,this paper were also discussed the relationship between branch number on the different time constants and the insulation state.The simulation results show that for the same transformer,different number of branch on the coincidence degree of polarization spectrum is also different. For different operating life of the transformer,its number of polarization of the route is different as well,generally,the longer operating life the more degree of aging,its number of branch have an increasing trendency. The large and small time constant of the number of branch respectively reflect the insulation of the paper and oil,the worse of insulation situation,the number of branch has an increasing tendency.

关 键 词：信息熵-粒子群混合算法 极化谱吻合度 极化支路数 时间常数支路 绝缘状态 

分 类 号：TM411[电气工程—电器]