Low-frequency oscillation of train–network system considering traction power supply mode

IF 4.4 1区工程技术 Q2 TRANSPORTATION SCIENCE & TECHNOLOGY

Railway Engineering Science Pub Date : 2024-02-19 DOI:10.1007/s40534-023-00328-y

Yuchen Liu, Xiaoqin Lyu, Mingyuan Chang, Qiqi Yang

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Abstract

The low-frequency oscillation (LFO) has occurred in the train–network system due to the introduction of the power electronics of the trains. The modeling and analyzing method in current researches based on electrified railway unilateral power supply system are not suitable for the LFO analysis in a bilateral power supply system, where the trains are supplied by two traction substations. In this work, based on the single-input and single-output impedance model of China CRH5 trains, the node admittance matrices of the train–network system both in unilateral and bilateral power supply modes are established, including three-phase power grid, traction transformers and traction network. Then the modal analysis is used to study the oscillation modes and propagation characteristics of the unilateral and bilateral power supply systems. Moreover, the influence of the equivalent inductance of the power grid, the length of the transmission line, and the length of the traction network are analyzed on the critical oscillation mode of the bilateral power supply system. Finally, the theoretical analysis results are verified by the time-domain simulation model in MATLAB/Simulink.

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考虑牵引供电模式的列车网络系统低频振荡

由于列车引入了电力电子设备，列车网络系统中出现了低频振荡（LFO）。目前研究中基于电气化铁路单侧供电系统的建模和分析方法并不适用于列车由两个牵引变电站供电的双边供电系统中的 LFO 分析。本文基于中国 CRH5 型动车组的单输入、单输出阻抗模型，建立了单侧供电和双边供电两种供电方式下的列车-网络系统节点导纳矩阵，包括三相电网、牵引变压器和牵引网络。然后采用模态分析法研究单侧和双边供电系统的振荡模式和传播特性。此外，还分析了电网等效电感、输电线路长度和牵引网络长度对双边供电系统临界振荡模式的影响。最后，通过 MATLAB/Simulink 时域仿真模型验证了理论分析结果。

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来源期刊

Railway Engineering Science TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

10.80

自引率

7.90%

发文量

1061

审稿时长

15 weeks

期刊介绍： Railway Engineering Science is an international, peer-reviewed, and free open-access journal that publishes original research articles and comprehensive reviews related to fundamental engineering science and emerging technologies in rail transit systems, focusing on the cutting-edge research in high-speed railway, heavy-haul railway, urban rail transit, maglev system, hyperloop transportation, etc. The main goal of the journal is to maintain high quality of publications, serving as a medium for railway academia and industry to exchange new ideas and share the latest achievements in scientific research, technical innovation and industrial development in railway science and engineering. The topics include but are not limited to Design theory and construction technology System dynamics and safetyElectrification, signaling and communicationOperation and maintenanceSystem health monitoring and reliability Environmental impact and sustainabilityCutting-edge technologiesThe publication costs for Railway Engineering Science are fully covered by Southwest Jiaotong University so authors do not need to pay any article-processing charges.

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