| 非周期分量对电流互感器暂态饱和的影响 |
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| 引用本文： | 李艳鹏,侯启方,刘承志.非周期分量对电流互感器暂态饱和的影响[J].电力自动化设备,2006,26(8):15-18. |
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| 作者姓名： | 李艳鹏 侯启方 刘承志 |
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| 作者单位： | 西南交通大学,电气学院,四川,成都,610031 |
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| 摘 要： | 电流互感器一次侧电流中含有非周期直流分量时,会发生暂态饱和,致使二次侧电流波形失真,从而引起继电保护装置的误动或拒动。通过对非周期直流分量电流引起的电流互感器暂态饱和励磁电流进行计算,对电流互感器的暂态饱和特性进行了分析。利用Matlab仿真软件搭建了仿真实验模型,通过改变一次侧电流中非周期直流分量的方向,研究了非周期直流分量对电流互感器的饱和方向、入饱和时间的影响。最后,通过仿真比较说明了在含有不同方向非周期分量时电流互感器的暂态饱和特性。
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| 关 键 词： | 电流互感器 非周期分量 暂态饱和 Matlab/PSB仿真 |
| 文章编号： | 1006-6047（2006）08-0015-04 |
| 收稿时间： | 2005-10-24 |
| 修稿时间： | 2005-12-13 |
Influence of non-periodic components on transient saturation of current transformer |
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| LI Yan-peng,HOU Qi-fang,LIU Cheng-zhi.Influence of non-periodic components on transient saturation of current transformer[J].Electric Power Automation Equipment,2006,26(8):15-18. |
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| Authors: | LI Yan-peng HOU Qi-fang LIU Cheng-zhi |
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| Affiliation: | Southwest Jiaotong University, Chengdu 610031, China |
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| Abstract: | Transient saturation of CT(Current Transformer) will take place when its primary cur-rent contains DC component,which may cause distorted secondary current waveforms and incorrect operations of relay protections.By calculating the excitation current of CT caused by DC component,its transient saturation behavior is analyzed.Based on the simulation model established with Matlab,influences of DC component on the saturation direction and start time are studied by changing the direction of DC component.By comparing simulation results,the transient saturation behavior of CT caused by non-periodic components in different directions is explained. |
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| Keywords: | current transformer non-periodic component transient saturation Matlab / PSB simulation |
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