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基于HHT DBWT的无绝缘轨道电路补偿电容故障诊断
资料介绍
通过基于传输线理论的无绝缘轨道电路分路状态仿真模型,分析补偿电容断线故障对轨道短路电流的影响规律,利用机车信号感应电压包络与轨道电路短路电流的关系,提出基于机车信号记录信息的补偿电容故障诊断方法。该方法采用B样条离散二进小波变换对机车信号所记录的感应电压幅度包络信号进行降噪,再通过对Hilbert-Huang变换的改进,计算各IMF分量经逐级累加后的相位信息,最后利用相位卷绕,根据相位信息中突变点的分布变化和补偿电容状态的对应关系,实现对补偿电容的故障诊断。实验表明,该方法适应性较强,受轨道电路长度和道砟电阻等轨道参数影响很小,能够准确检测出轨道电路单一补偿电容的故障位置,并且由于该方法的分析数据直接来自于机车信号自身的记录器,不需要额外增加硬件和单独安排运行交路,因此能够降低检测成本和满足对检测及时性等方面的要求。
The shunt state model of jointless track circuits based on the transmission line theory was used to simulation the influence of compensation capacitor failures on the short-circuit currens of track circuits.The method of diagnose compensation capacitor failures based on cab signal recorder information was proposed by analyzing the relationship between the short circuit currents of track circuits and the voltages induced by cab signals.With this detecting method,DBWT was adopted to reduce the noises in the induced voltage signals;the HHT was improved to calculate the phase informa...
部分文件列表
| 文件名 | 大小 |
| 基于HHT、DBWT的无绝缘轨道电路补偿电容故障诊断.pdf | 453K |
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