基于改进J-A磁滞模型的电流互感器建模及实验分析

发布时间：2018-11-07 06:47

【摘要】：为研究计及铁芯磁滞效应的电流互感器(TA)传变特性,提出了一种新的TA数值模型。基于J-A磁化理论推导表征铁芯励磁特性的经典J-A磁滞模型,并对经典模型存在非物理解的缺陷进行了修正,形成改进J-A磁滞模型。其次,将TA的传变特性方程与铁芯改进J-A磁滞模型相耦合,建立了TA数值模型。搭建TA传变特性的测试电路,对比分析二次电流i2的理论计算波形和实际测量波形,试验表明:改进J-A磁滞模型更准确地表征铁芯的磁滞特性。同时,TA数值模型能基本反映TA的传变特性,具备物理概念清晰、计算量小、精度较高等优点,可广泛运用于各类铁磁材料的TA建模。
[Abstract]:A new TA numerical model is proposed to study the (TA) transformation characteristics of current transformer considering the hysteresis effect of iron core. Based on J-A magnetization theory, the classical J-A hysteresis model is derived to characterize the excitation characteristics of iron core, and the defect of non-physical solution of the classical model is corrected to form an improved J-A hysteresis model. Secondly, the transfer characteristic equation of TA is coupled with the improved J-A hysteresis model of iron core, and the TA numerical model is established. The experimental results show that the improved J-A hysteresis model can more accurately characterize the hysteresis characteristics of iron core. At the same time, the TA numerical model can basically reflect the transmission characteristics of TA, and has the advantages of clear physical concept, less computation and higher precision. It can be widely used in the TA modeling of various ferromagnetic materials.
【作者单位】：重庆大学输配电装备及系统安全与新技术国家重点实验室;重庆市电力公司;
【基金】：国家重点基础研究发展计划(973计划)(2009CB724508-1)~~
【分类号】：TM452

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