The harmonic impedance of traction power supply systems (TPSSs) is a crucial parameter in identifying, preventing and suppressing high-order harmonic resonances. This article proposes a TPSS harmonic impedance identification method considering the harmonic lateral propagation between two adjacent feeding sections. An operation mode determination method and an improved mean shift clustering are presented, eliminating background harmonic effects and ensuring identification accuracy. Comparative simulations reveal that the proposed method achieves superior performance than conventional methods even if the ratio between load- and source-side impedance fluctuates. Experimental results from a scaled-down laboratory prototype further validate the effectiveness and feasibility of the proposed method.

中文翻译：

---

考虑谐波横向传播的牵引供电系统谐波阻抗准确辨识


牵引供电系统（TPSS）的谐波阻抗是识别、预防和抑制高次谐波谐振的关键参数。本文提出一种考虑两个相邻馈电段之间谐波横向传播的TPSS谐波阻抗识别方法。提出了一种工作模式确定方法和改进的均值漂移聚类，消除了背景谐波影响，保证了识别精度。比较仿真表明，即使负载侧阻抗与源侧阻抗之比发生波动，所提出的方法也能实现比传统方法更优越的性能。小型实验室原型机的实验结果进一步验证了该方法的有效性和可行性。