| 小电流接地系统选线注入信号的频率分析 |
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| 引用本文： | 战祥新,郝世勇,董雷. 小电流接地系统选线注入信号的频率分析[J]. 工矿自动化, 2008, 0(5) |
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| 作者姓名： | 战祥新 郝世勇 董雷 |
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| 作者单位： | 海军航空工程学院青岛分院,山东,青岛,266041 |
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| 摘 要： | 注入信号法是广泛应用于小电流接地系统单相接地故障的选线方法,实际应用中由于接地故障电阻大,容易发生选线失败的现象。文章通过分析注入信号法的基本原理及注入信号的流通路径,借助Matlab仿真,研究了注入信号频率对选线效果的影响,得出了降低注入信号的频率可以减小非故障线路对信号电流的分流作用、提高注入法的适用范围和选线准确率的结论。
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| 关 键 词： | 小电流接地系统 故障选线 注入信号法 频率分析 仿真研究 |
Analysis of Frequency of Injected Signal of Selecting Fault Line in Small-current Grounded Power System |
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| ZHAN Xiang-xin,HAO Shi-yong,DONG Lei. Analysis of Frequency of Injected Signal of Selecting Fault Line in Small-current Grounded Power System[J]. Industry and Automation, 2008, 0(5) |
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| Authors: | ZHAN Xiang-xin HAO Shi-yong DONG Lei |
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| Abstract: | The signal injection method is widely used for selecting fault line in small-current grounded power system.Because of large fault earth resistance,some mistakes of selecting fault line would occur easily in practice.Based on the analysis of the basic principle and the circulating circuit of the injected(signal) method,simulation by Matlab, the paper studied the effect of frequency of injected signal on the(result) of selecting fault line.Then it concluded that decreasing the frequency of injected signal can reduce shunts of non-fault lines,improve application area and accurate rate of the method. |
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| Keywords: | small-current grounded power system selecting fault line signal injection method (frequency analysis ) simulation research |
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