| 引用本文: | 郭谋发,严 敏,陈 彬,杨耿杰.基于波形时域特征聚类法的谐振接地系统故障选线[J].电力自动化设备,2015,35(11): |
| GUO Moufa,YAN Min,CHEN Bin,YANG Gengjie.Faulty line selection based on waveform feature clustering in time domain for resonance grounding system[J].Electric Power Automation Equipment,2015,35(11): |
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| 摘要: |
| 利用谐振接地系统的零序网络分析单相接地后各线路零序电流波形相似性，基于此提出一种基于暂态零序电流波形时域特征聚类的谐振接地系统单相接地故障选线新方法。根据对各线路故障后首半个周期的零序电流波形的直方图分解结果，采用反映状态差异的相对熵矩阵表示零序电流波形的极性信息，结合幅值信息构造表征暂态零序电流波形时域特征的综合相对熵特征矩阵，由免阈值设定的模糊核聚类算法判别故障线路。在不同工况下对所提方法进行仿真验证，结果表明，所提方法不受电弧故障、噪声干扰、采样不同步和补偿度的影响。 |
| 关键词: 谐振接地系统 故障选线 暂态零序电流 直方图分解 相对熵 模糊核聚类 |
| DOI： |
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| 基金项目:国家自然科学基金资助项目（51377023） |
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| Faulty line selection based on waveform feature clustering in time domain for resonance grounding system |
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GUO Moufa1, YAN Min2, CHEN Bin3, YANG Gengjie1
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1.College of Electrical Engineering and Automation，Fuzhou University，Fuzhou 350116，China;2.Fuzhou Power Supply Company of State Grid Fujian Electric Power Company，Fuzhou 350003，China;3.Electric Power Research Institute of State Grid Fujian Electric Power Company，Fuzhou 350007，China
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| Abstract: |
| The waveform similarity of line zero-sequence currents after the single-phase grounding fault of resonance grounding system is analyzed based on its zero-sequence network and a method of faulty line selection based on the waveform feature clustering in the time domain is proposed for it. The line zero-sequence current waveform of the first post-fault half-period is decomposed in histograms and the relative entropy matrix is adopted to reflect the state difference among the zero-sequence currents，as well as their polarity information. Combined with the amplitude information，an integrated relative entropy matrix is established to represent the time-domain waveform feature of transient zero-sequence currents. The fuzzy KFCM（Kernel Fuzzy C-Means） without the threshold setting is used to detect the faulty line. The proposed method is verified by the simulations under different working conditions and the results show that，it is immune to the arc fault，noise disturbance，non-synchronized sampling and compensation degree. |
| Key words: resonance grounding system faulty line selection transient zero-sequence current histogram decomposing relative entropy fuzzy kernel clustering |
