基于相空间的励磁涌流新特征分析  

A Novel Characteristic of Magnetizing Inrush Current Based on Phase Space

作　　者：刘世明[1] 许志成[1] 李森林[1] 呼文强[1] 张玉海[1] 

机构地区：[1]山东大学电气工程学院,山东省济南市250061

出　　处：《电力系统自动化》2012年第18期134-138,共5页Automation of Electric Power Systems

基　　金：山东大学自主创新基金资助项目(10000059614001)

摘　　要：提出一种基于相空间的励磁涌流新特征。该特征利用混沌时间序列重构相空间的原理,把一维时间序列的单相电流采样信号映射到高维相空间,通过比较在相空间内形成的相轨迹来区分励磁涌流和内部故障电流。仿真实验表明:在变压器各种不同运行参数情况下,都可以重构成一个相同的相空间,并且可以清晰地看出励磁涌流与变压器内部故障电流相轨迹的区别,从而为快速识别励磁涌流提供新思路。A new characteristic based on phase space theory to identify magnetizing inrush current is introduced.＇ By reconstructing phase space with chaotic time-series, the one-dimensional single current sampled signal is mapped to a hyper- space to become hyperdimensional; meanwhile, the phase locus indicates the difference between inrush current and inner fault current. Simulation results show that it is possible to reconstruct a similar phase space under variable cases, and the phase locus of inrush current is very different from that of inner fault current.

关 键 词：变压器保护 差动保护 励磁涌流 相空间 时间序列重构 嵌入定理 

分 类 号：TM407[电气工程—电器]