基于变压器动态非线性模型励磁涌流的研究  

Research on excitation inrush current based on dynamic nonlinear modeling of the transformer

作　　者：魏巍[1] 曾果[2] 李兴源[2] 胡永银[2] 

机构地区：[1]国网四川省电力公司电力科学研究院,成都610072 [2]四川大学电气信息学院,成都610065

出　　处：《电测与仪表》2016年第4期33-38,共6页Electrical Measurement & Instrumentation

基　　金：国网四川省电力公司川藏联网工程项目(521997135061)

摘　　要：基于变压器铁芯拓扑结构建立了电路方程和磁路方程并进行了深入分析,然后将电路方程和磁路方程结合起来,利用Jiles-Atherton铁磁磁滞原理模拟变压器铁芯磁滞特性曲线,建立了计及剩磁的变压器非线性模型。基于所建立的变压器模型研究了在不同剩磁不同合闸角情况下变压器空载合闸的励磁涌流,结果显示了剩磁和合闸角对磁滞曲线和励磁涌流都有很大的影响,磁滞曲线的畸变程度则决定了励磁涌流的大小。According to iron core topology structure of transformer, the circuit equations and magnetic circuit equa- tions are derived respectively, and then the ferromagnetic hysteresis loop of transformer is simulated based on Jiles- Atherton theory. The transformer nonlinear model considering remnant flux is established. Based on the model, no- load switching excitation inrush current is studied under condition of different remnant flux and switching angle. The results show that the remnance and switching angle have great influence on the hysteresis loop and excitation inrush current. Meanwhile, the distortion degree of hysteresis loop determines the amplification of the excitation inrush cur- rent.

关 键 词：非线性模型 磁路分析 剩磁 励磁涌流 

分 类 号：TM441[电气工程—电器]