| 引用本文: | 王艳松,衣良.基于小波变换和强跟踪滤波器的配电网短路故障定位[J].电力系统保护与控制,2013,41(15):76-81. |
| WANG Yan-song,YI Liang.Location for interphase short circuit fault in distribution network based on wavelet transforms and strong tracking filter[J].Power System Protection and Control,2013,41(15):76-81 |
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| 摘要: |
| 针对配电线路故障测距受过渡电阻的影响问题，提出强跟踪滤波器的方法实现配电网相间短路故障测距。利用小波分析对配电线路首端故障电流和电压进行预处理，消除信号中的高频噪声信号。分析配电网相间短路构成的故障回路，建立关于线路故障电流和短路过渡电阻的微分方程。合理选择状态量和输出量将故障回路的微分方程转化为状态估计方程，利用强跟踪滤波器的状态估计算法实现相间短路的故障测距。通过Matlab仿真表明该算法是有效的，利用小波分析对故障电流和电压进行处理，能提高测距的快速性和准确性。 |
| 关键词: 强跟踪滤波器 配电网 相间短路故障 故障定位 小波变换 |
| DOI：10.7667/j.issn.1674-3415.2013.15.011 |
| 分类号: |
| 基金项目:山东省自然科学基金（ZR2012EEL20） |
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| Location for interphase short circuit fault in distribution network based on wavelet transforms and strong tracking filter |
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WANG Yan-song,YI Liang
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| Abstract: |
| The transition resistance affects the fault location in distribution network. For this reason, strong tracking filter is proposed to achieve location of phase to phase short circuit fault. First of all, the short-circuit current and voltage of head-end distribution line is preprocessed by using the wavelet transform in order to eliminate high frequency noise in original signal. The differential equations about fault current and fault transition resistance are established by analyzing the fault loop. The state variable and output variable are properly selected in order to transform the fault circuit’s differential equation to state estimation equation. Then the model state is estimated by using strong tracking filter, thus to achieve fault location. The effectiveness of the algorithm has been verified by the Matlab simulation results. In addition, the preprocessing of short-circuit current and voltage by using the wavelet transform can improve the speed and accuracy of fault location. |
| Key words: strong tracking filter (STF) distribution network interphase short circuit fault fault location wavelet transform |
