| 基于相关分析的暂态零模电流与功率故障定位方法比较 |
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| 引用本文： | 田书,王晓卫,王娟娟.基于相关分析的暂态零模电流与功率故障定位方法比较[J].电网技术,2011(4). |
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| 作者姓名： | 田书 王晓卫 王娟娟 |
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| 作者单位： | 河南理工大学电气工程与自动化学院; |
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| 摘 要： | 在分析小电流接地系统单相接地故障暂态零模电流与功率特性的基础上,利用故障点同侧2点暂态信息量相似度高、相关系数接近于1,而故障点两侧2点相似度低、相关系数小这一特点,对电流法和功率法在不同电压初相角与接地电阻时的相关系数进行了对比,分析得出,在阀值的选择上,电流法较功率法灵活且裕度大,抗干扰能力强;而功率法在线路末端高阻接地时,信号获取较为容易。另外,提出相关系数比例因子的概念,用于对2种方法的相关系数值进行综合性能评价,得出了各自方法的最佳工作性能区间。
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| 关 键 词： | 故障定位 相关分析法 阀值 比例因子 |
Comparative Research on Fault Location by Transient Zero-Module Current and Transient Zero-Module Power Based on Correlation Analysis |
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| TIAN Shu,WANG Xiaowei,WANG Juanjuan.Comparative Research on Fault Location by Transient Zero-Module Current and Transient Zero-Module Power Based on Correlation Analysis[J].Power System Technology,2011(4). |
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| Authors: | TIAN Shu WANG Xiaowei WANG Juanjuan |
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| Affiliation: | TIAN Shu,WANG Xiaowei,WANG Juanjuan(School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454000,Henan Province,China) |
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| Abstract: | On the basis of analyzing characteristics of transient zero-module current and power during single-phase earth fault occurred in small current neutral grounding system,by use of the feature that the transient information from two detection points located at the same side of fault point possesses high similarity and the value of correlation coefficient is close to 1 and the transient information from two detection points located at the opposite sides of fault point possesses low similarity and the value of c... |
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| Keywords: | fault location correlation analysis threshold scale factor |
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