谭书平,卿红梅
TAN Shu-ping,QING Hong-mei

• 1:温州电业局
• 2:浙能乐清发电有限责任公司

摘要(Abstract)：

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。
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 typical 500 kV EHV transmission system has been simulated by ATP to evaluate the scheme.A large of simulation results show that the proposed scheme is effective and capable of providing correct responses under conditions of different fault types,positions,path resistances,and inception angles.

关键词(KeyWords)： 暂态电流;多分辨形态;梯度;谱能量;形态学
transient current;multi-resolution morphological;gradient;spectrum energies;morphological morphology

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 谭书平,卿红梅
TAN Shu-ping,QING Hong-mei

DOI: 10.19585/j.zjdl.2008.04.003

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