互感器铁心损耗非线性对铁磁谐振混沌特性影响研究  

Effect of Chaotic Character of Ferroresonance with Nonlinear Core Loss in PT

作　　者：惠萌[1] 刘盼芝[1] 

机构地区：[1]长安大学电子与控制工程学院,陕西西安710064

出　　处：《陕西电力》2013年第7期51-54,共4页Shanxi Electric Power

基　　金：国家自然科学基金资助(41101357);长安大学基础研究支持计划专项资金(2013G1321037)

摘　　要：铁磁谐振是电力系统中一种常见的复杂的非线性现象,针对中性点直接接地电力系统的铁磁谐振混沌特性进行了深入研究。针对互感器实时铁心损耗的非线性特性,利用一个三次多项式来拟合铁心损耗,通过对比研究发现当引入非线性铁心损耗后系统发生混沌震荡的激励电压区间变窄,系统暂态过程也相应缩短,EMTP仿真实验进一步说明了理论分析的正确性。Ferroresonance is complicated nonlinear phenomenon which often happens in power system. Core loss of the power transformer is modeled by a third order series in voltage. Comparing with linear core loss, the results show that the onset of chaos appears at larger excitation voltage and the transient duration is shorter. Moreover, the EMTP simulation results show the rightness of theory analysis.

关 键 词：铁磁谐振 铁心损耗 混沌特性 EMTP 

分 类 号：TM132[电气工程—电工理论与新技术]