| 引用本文: | 宋国兵,陈 锐,常仲学,闫吉飞.边界主动构建式低压交流串联电弧故障检测方法[J].电力系统保护与控制,2025,53(22):65-76.[点击复制] |
| SONG Guobing,CHEN Rui,CHANG Zhongxue,YAN Jifei.Boundary-active construction method for low-voltage AC series arc fault detection[J].Power System Protection and Control,2025,53(22):65-76[点击复制] |
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| 摘要: |
| 准确、经济、可靠地检测串联电弧故障是预防电气火灾的重要途径之一。针对低压交流配电系统单端量串联电弧检测中故障位置难以判别、暂态分量难以提取的问题，提出一种能够隔离故障区间同时降低故障特征提取难度的边界主动构建式串联电弧故障检测方法。首先，分析了串联电弧故障产生的高频分量特征，指出仅靠线路的自然衰减作用无法保证故障判别的绝对选择性。然后，分析了在线路边界处设置铁氧体磁环对串联电弧高频分量特征的影响规律。最后，利用线路附加磁环边界后的特征，构建了反映磁环边界内外侧邻波压差的串联电弧故障检测方法。研究发现，所提边界元件能够显著衰减高频分量的传输，实现故障区间高频分量的隔离，且基于边界处高频电压的检测方法降低了对高精度电流传感器设备的依赖。实验结果表明，该方法能有效避免区外故障干扰，实现了低压配电系统串联电弧故障的可靠检测。 |
| 关键词: 低压交流系统 串联电弧 铁氧体磁环 边界作用 高频分量 |
| DOI：10.19783/j.cnki.pspc.241709 |
| 投稿时间：2024-12-21修订日期：2025-07-23 |
| 基金项目:国家自然科学基金项目资助(52107123) |
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| Boundary-active construction method for low-voltage AC series arc fault detection |
| SONG Guobing,CHEN Rui,CHANG Zhongxue,YAN Jifei |
| (School of Electrical Engineering, Xi’an Jiaotong University, Xi’an 710049, China) |
| Abstract: |
| Accurate, economical, and reliable detection of series arc faults is one of the key approaches to preventing electrical fires. To address the challenges in single-ended series arc detection in low-voltage AC distribution systems, specifically, the difficulty in identifying the fault location and extracting transient components, a boundary-active series arc fault detection method is proposed, which can isolate the fault zone while reducing the complexity of fault feature extraction. First, the characteristics of the high-frequency components generated by series arc faults are analyzed, revealing that relying solely on the natural attenuation of the line cannot ensure absolute selectivity in fault identification. Then, the influence of ferrite magnetic ring boundary on the high-frequency characteristics of series arc faults is analyzed. Finally, based on the characteristics introduced by the added magnetic ring boundary, a detection method is developed that identifies series arc faults by analyzing the differential voltage of adjacent waves on both sides of the magnetic boundary. It is found that the proposed boundary element can significantly attenuate the propagation of high-frequency components, effectively isolating the fault zone’s high-frequency signals. Moreover, the boundary-based high-frequency voltage detection method eliminates the need for high-precision current sensors. Experimental results show that the proposed method can effectively avoid the interference from external faults and achieve reliable detection of series arc faults in low-voltage distribution systems. |
| Key words: low-voltage AC system series arc ferrite magnetic ring boundary effect high-frequency component |
