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电网技术  2006 

基于小波包分频特性的中性点不接地系统铁磁谐振检测

, PP. 72-76

Keywords: 中性点不接地系统,小波包分析,铁磁谐振,电力系统

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Abstract:

根据中性点不接地系统中单相瞬时性接地激发铁磁谐振时零序电压的特点,将零序电压按时段分成2组,利用小波包分别对2组电压进行分解,按能量最大原则选取特征频段。根据2组电压特征频段的异同实现铁磁谐振的检测,并采用电压幅值比较法作为辅助判据。仿真结果和硬件实验平台实验结果表明该方法能正确地将铁磁谐振、单相瞬时性和单相永久性接地区分开。

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