Analysis on harmonic current and its impact on track circuit in high speed railway

2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT) Pub Date : 2016-08-01 DOI:10.1109/ICIRT.2016.7588749

Shiwu Yang, Jianzhao Tian, Hao Xu, Yong Cui, Lei Chen

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引用次数: 2

Abstract

The Traction current harmonics caused by rolling stock or EMU are main interference source on signaling system, especially on track circuits in high speed railway. Obviously, it is essential to estimate the potential value of each harmonic current within the signal frequency band for the reliable operation of track circuit. In Europe, EN 50238 and CLC/TC 50238, using FFT to calculate harmonic components, were established to control the harmonics from rolling stock. At first, considering that traditional FFT is applicable for steady current due to result accuracy of the frequency and amplitude, the transient interference processing method is discussed based on principle of Wavelet transform modulus maximum for the singularity detection. Then, since the measured current data in the field are usually not the maximal value, based on the least square fitting method, the regularity of harmonic proportion is studied and evaluated after interpolating windowed FFT in harmonic frequency analysis. Finally, adopting the test data of Chinese CRH-X type EMU in operation, the transient current and the steady current data are analyzed to get harmonic components. It is proved that the compatibility between the rolling stock and the track circuits can be achieved under present condition.

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高速铁路谐波电流及其对轨道电路的影响分析

机车车辆或动车组产生的牵引电流谐波是信号系统，特别是高速铁路轨道电路的主要干扰源。显然，估计信号频带内各谐波电流的电位值对于轨道电路的可靠运行至关重要。在欧洲，建立了EN 50238和CLC/TC 50238，利用FFT计算谐波分量来控制机车车辆的谐波。首先，考虑到传统FFT由于频率和幅值的结果精度而适用于稳态电流，讨论了基于小波变换模极大值原理的瞬态干扰处理方法用于奇异点检测。然后，由于现场实测电流数据通常不是最大值，基于最小二乘拟合方法，对谐波频率分析中加窗FFT插值后的谐波比例规律进行了研究和评价。最后，采用国产CRH-X型动车组在运行中的测试数据，对其暂态电流和稳态电流数据进行分析，得到其谐波分量。实践证明，在现有条件下，车辆与轨道电路的兼容是可以实现的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 IEEE International Conference on Intelligent Rail Transportation (ICIRT)

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