【摘要】 当动车组速度提升至400 km/h，由动车组和牵引供电系统引入的牵引电流及其谐波随之变化，并以钢轨为耦合途径，干扰轨旁信号设备工作状态。为保障高速铁路安全高效运营，应对信号系统的适应性和抗干扰设计给予重视。在此背景下，基于新一代高速动车组列车，围绕高速条件下列车追踪动态条件、动车组不同工况下的牵引电流特性及其对轨道电路设备的影响开展研究。通过建立牵引电流动态分布模型，基于潮流计算原理，提出更高运营速度条件下回流动态分布的建模和计算方法，预测高速运行时的牵引回流；通过建立牵引电机仿真模型，分析更高运营速度条件下的谐波特性，预测不同工况下动车组谐波干扰的幅值和频率分布；依据国内外现行标准，分析轨道电路设备对于牵引电流和谐波干扰的适应性，为信号设备的干扰防护和评估提供参考。更多还原

【Abstract】 As the speed of high-speed trains increases to 400 km/h, the traction current and its harmonics introduced by the EMU and the traction power supply system change accordingly, coupling through the rails and interfering with the working state of trackside signal equipment. To ensure the safe and efficient operation of HSRs, it is essential to emphasize the adaptability and interference resistance design of the signaling system. In this context, a study is conducted based on the new generation of high-speed EMU trains, focusing on the dynamic tracking conditions of trains under high-speed conditions, the characteristics of traction current under different working conditions of EMUs, and their impact on track circuit devices. By establishing a dynamic distribution model for traction current and utilizing power flow calculation principles, this paper proposes modeling and computation methods for return current dynamics distribution under higher operational speed conditions, predicting the traction return current during high-speed operation. Additionally, a traction motor simulation model is developed to analyze the harmonic characteristics under higher speed conditions, predicting the magnitude and frequency distribution of EMU harmonic interference under different working conditions. Based on current domestic and international standards, this paper analyzes the adaptability of track circuit devices to traction current and harmonic interference, providing references for the interference protection and assessment of signal equipment.更多还原