基于电压源变流器的动态牵引网阻抗模拟方法  

Dynamic traction network impedance simulation method based on voltage source converter

作　　者：冯洪赟 朱泓宇 董跃 王俊辉 张逸凡 刘芸江 李朝阳[1] 胡海涛[1] FENG Hongyun;ZHU Hongyu;DONG Yue;WANG Junhui;ZHANG Yifan;LIU Yunjiang;LI Zhaoyang;HU Haitao(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学电气工程学院,四川成都611756

出　　处：《电力科学与技术学报》2025年第1期237-244,共8页Journal of Electric Power Science And Technology

基　　金：国家自然科学基金(52107125);国家级大学生创新创业训练计划支持项目(202310613025)。

摘　　要：新型所群双边牵引供电系统能够减少电分相数量、增加供电臂距离并提高供电能力,可有效解决西部艰险山区电气化铁路建设中电分相设置困难的难题。目前,该系统仍处于理论验证及实验探索阶段,在仿真系统中,模拟因列车移动所导致的牵引网阻抗动态变化的过程较难实现。针对此问题,首先提出一种基于电压源变流器(voltage source converter,VSC)的牵引网阻抗模拟方法,通过对VSC交流端口等效阻抗的控制来模拟实物系统中列车两端牵引网阻抗的变化,进而实现对列车动态运行过程的实验模拟;随后运用所提方法在MATLAB/SIMULINK中搭建系统仿真模型。仿真结果表明:该方法能够模拟列车各种工况时牵引网阻抗的动态变化,所提出的牵引网阻抗模拟方法有利于进一步开展新型所群双边牵引供电系统的探索与验证。The new type of bilateral traction power supply system of traction substation groups can reduce the number of neutral sections,increase the distance of the power supply arm,and improve the power supply capacity.Furthermore,it provides a solution to the setting of neutral sections in the construction of electrified railways in the western and dangerous mountainous areas.At present,the system is still in the stage of theoretical verification and experimental exploration.In the simulation system,it is difficult to achieve the dynamic change process of traction network impedance caused by train movement.To address this issue,a simulation method of traction network impedance based on the voltage source converter(VSC)is proposed.By controlling the equivalent impedance of the alternating current port of VSC,the change in the impedance of the traction network at both ends of the train in the physical system is simulated,thus realizing the experimental simulation of the dynamic operation process of the trains.The proposed method is employed to build a system simulation model in MATLAB/SIMULINK.The simulation results indicate that the proposed method is able to simulate the dynamic changes in the traction network impedance when the train is under various working conditions.Moreover,the proposed traction network impedance simulation method is conducive to the further exploration and validation of the new type of bilateral traction power supply system of traction substation groups.

关 键 词：阻抗模拟 电压源变流器 所群贯通供电 牵引供电 dq解耦控制 

分 类 号：TM46[电气工程—电器]