| 基于二维小波分析的配电网单相接地故障选线的一种新方法 |
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| 引用本文： | 刘增训,梁军,仇卫东,贠志皓.基于二维小波分析的配电网单相接地故障选线的一种新方法[J].电力系统保护与控制,2005,33(9):1-5. |
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| 作者姓名： | 刘增训 梁军 仇卫东 贠志皓 |
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| 作者单位： | 1. 山东大学电气工程学院,山东济南250061;2. 山东电力工程咨询院,山东济南250013 |
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| 摘 要： | 将二维小波分析应用于配电网单相接地故障选线中,通过构造零序电流的解析信号,实现了对故障暂态信号幅值和相位相结合的分析,提出了一种接地选线的新方法。相对于单纯考虑幅值或相位的方法,这种结合分析能够更充分地提取丰富的故障暂态量特征信息。理论分析及Matlab仿真表明:该方法可以更加准确有效地实现故障选线。
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| 关 键 词： | 配电网 故障选线 解析信号 小波变换 单相故障 |
| 文章编号： | 1003-4897(2005)09-0001-05 |
| 修稿时间： | 2004年8月10日 |
A new single-phase earth fault detection method based on two-dimensional wavelet transform in distribution automation system |
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| LIU Zeng-xun,LIANG Jun,QIU Wei-dong,YUN Zhi-hao.A new single-phase earth fault detection method based on two-dimensional wavelet transform in distribution automation system[J].Power System Protection and Control,2005,33(9):1-5. |
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| Authors: | LIU Zeng-xun LIANG Jun QIU Wei-dong YUN Zhi-hao |
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| Affiliation: | LIU Zeng-xun~1,LIANG Jun~1,QIU Wei-dong~2,YUN Zhi-hao~1 |
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| Abstract: | A novel method of applying two-dimensional wavelet transform to detect single-phase fault in distribution system is proposed. By structuring analytic signals of zero-sequence current, the analysis of combining amplitude and phase of fault transient signals is realized. Compared with the use of single amplitude or single phase, applying combined signal can obtain more details of transient signal. Theoretical analysis and Matlab based simulations show that the presented method can exactly and effectively choose the fault line in single phase-to-ground fault. |
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| Keywords: | distribution systems fault line selection analytic signals wavelet transform single-phase fault |
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