| 小电流单相接地故障选线方法研究 |
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| 引用本文： | 房东贤,袁振海,王琦,饶日嵩. 小电流单相接地故障选线方法研究[J]. 电测与仪表, 2009, 46(12) |
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| 作者姓名： | 房东贤 袁振海 王琦 饶日嵩 |
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| 作者单位： | 南京工业大学自动化与电气工程学院,南京,210009;南京工业大学自动化与电气工程学院,南京,210009;南京工业大学自动化与电气工程学院,南京,210009;南京工业大学自动化与电气工程学院,南京,210009 |
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| 摘 要： | 根据小电流接地系统发生单相接地故障时,暂态零序容性电流特征频段内故障线路暂态零序电流相位与非故障线路相反,提出了利用复小波变换提取该特征频段内相位信息,同时对特征频段内小波变换域进行了能量最大化选择的选线算法.通过在MATLAB中仿真分析验证,该算法不受过渡电阻、合闸角的影响,能够正确选择出故障线路.
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| 关 键 词： | 小电流接地 特征频段 复小波变换 相位信息 能量最大化 选线 |
Study on Small Current Phase-to-ground Fault Location Method |
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| FANG Dong-Xian,YUAN Zhen-Hai,Wang Qi,Rao Ri-song. Study on Small Current Phase-to-ground Fault Location Method[J]. Electrical Measurement & Instrumentation, 2009, 46(12) |
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| Authors: | FANG Dong-Xian YUAN Zhen-Hai Wang Qi Rao Ri-song |
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| Affiliation: | FANG Dong-Xian,YUAN Zhen-Hai,Wang Qi,Rao Ri-Song (School ofAutomation , electrical engineering,NanjingUniversityofTechnology,Nanjing210009,China) |
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| Abstract: | Based on single-phase malfunction in low current grounded system,the transient zero-sequence capacitive current of faulty line in character frequency range is just the reverse of that in non-faulty line,extracting the phase information in character frequency range using complex wavelet transform was proposed. Meantime,the selection of maximization energy of wavelet transform was made. The emulation and analysis in MATLAB prove that this algorithm is not influenced by the transition resistance,and the close ... |
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| Keywords: | low current grounded character frequency range complex wavelet transform phase information maximization energy line selection |
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