| 基于多分辨率形态梯度的超高压线路暂态保护新原理 |
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| 引用本文： | 谭书平,卿红梅.基于多分辨率形态梯度的超高压线路暂态保护新原理[J].浙江电力,2008,27(4):9-12. |
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| 作者姓名： | 谭书平 卿红梅 |
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| 作者单位： | 1. 温州电业局,浙江,温州,325000
2. 浙能乐清发电有限责任公司,浙江,乐清,325609 |
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| 摘 要： | 由于母线杂散电容和耦合电容对高频暂态电流的衰减作用,超高压线路发生区内、外故障时的暂态电流行波中高频分量的含量有所不同。利用多分辨形态梯度提取多个频段内暂态信号的谱能量构成新的单端暂态电流保护原理。大量的ATP仿真数据也表明：本方案在线路发生不同位置、不同过渡电阻、不同初始角等情况下的故障时都能准确、快速的放大并提取这种差异。
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| 关 键 词： | 暂态电流 多分辨形态 梯度 谱能量 形态学 |
A New Transient Protection Principle for EHV Transmission Line Based on Multi-resolution Morphological Gradient |
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| TAN Shu-ping,QING Hong-mei.A New Transient Protection Principle for EHV Transmission Line Based on Multi-resolution Morphological Gradient[J].Zhejiang Electric Power,2008,27(4):9-12. |
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| Authors: | TAN Shu-ping QING Hong-mei |
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| Abstract: | A new transient protection principle based on multi-resolution morphological gradient(MMG) transformation is proposed in this paper.The transient current generated by the internal and external faults in extremely high voltage(EHV) transmission line contains different high frequencies because of the bus-bar stray capacitance and coupling capacitance.So the differences are extracted by the MMG,a fault can be identified as internal or external one based on the spectrum energies in many frequency bands.A typica... |
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| Keywords: | transient current multi-resolution morphological gradient spectrum energies morphological morphology |
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