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故障暂态分量能够充分地描述故障的特征,用来研究故障测距具有传统算法不可比拟的优点.针对复线牵引网的故障暂态高频分量和故障距离间的关系展开研究,绘制了故障距离和始端等效阻抗谐振频率的对应关系曲线,证明故障电压暂态信号和始端等效阻抗具有相同的谐振频率点.用Morlet复小波提取故障电压信号的谐振频率,并依据得到的谐振频率曲线,实现了牵引网的故障定位.分析表明,基于复小波分析的暂态谐振频率法进行牵引网故障测距,可以消除过渡电阻等对故障测距的影响,具有较高的精度和可靠性.
The fault transient component can fully describe the characteristics of the fault and is used to study the fault ranging with the incomparable merits of the traditional algorithm.According to the relationship between the transient high frequency component and the fault distance of the traction network, And the beginning of the equivalent impedance resonant frequency corresponding curve shows that the fault voltage transient signal and the beginning of the equivalent impedance with the same resonant frequency point Morlet complex wavelet extracted resonant frequency of the fault voltage signal and based on the obtained resonant frequency curve, The fault location of traction network is realized.The analysis shows that the transient resonance frequency method based on complex wavelet analysis can reduce the influence of transition resistance on fault location with high accuracy and reliability.