针对故障电弧的成因，阐述了设置故障电弧探测装置的必要性，对故障电弧探测的基本功能进行说明。
关键词 : 故障电弧 ; Lyapunov 指数 ; 弧声 ; 混沌 ; 阈值 [gap=6747]Key words : fault arcs ; Lyapunov exponents ; pre2arc sounds ; chaos ; threshold value
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The results show that the signature band of sound wave is within the range from 5 kHz to 10 kHz before fault arc taking place,and variable in both width and center with different electrode shapes,space between electrodes,and discharge voltage.
研究结果表明:故障电弧发生之前,电弧声的频率主要分布在5～10kHz的特征频段内,其带宽、频率中心和能量强度与电极形状、放电距离、放电电压等试验条件有关。
参考来源 - 开关柜内部弧光短路伴生弧声的频谱特性研究So it is feasible to forecast and early warn faults arc in switchgear by online detecting the energy of incipient arc sounds feature sub-bands.
通过在线监测信号这两个特征子频带能量的变化即可判断早期故障弧声是否存在,从而实现故障电弧的早期预测预警。
参考来源 - 基于小波分析的故障电弧伴生弧声特征提取·2,447,543篇论文数据，部分数据来源于NoteExpress
在阐述故障电弧物理现象的基础上，介绍了故障电弧防护标准。
The physical phenomenon of fault arc was described and the standard of the protection of fault arc was introduced.
在分析了目前常用的几种常规保护线路后指出，它们并不能对故障电弧进行全面保护。
After analysing a few of conventional protective circuits, it is point out that these circuits can not carry out overall protection on fault arc.
在分析了目前常用的几种常规保护线路后指出，它们并不能对故障电弧进行全面保护。
After analysing a few of conventional protective circuits, it is point out that these circuits can not carry out the overall protection on fault arc.
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