中国电机工程学报2017，Vol.37Issue(z1)：72-80,9.DOI:10.13334/j.0258-8013.pcsee.171799
电气化铁路车网耦合系统低频振荡分析
Analysis of Low-frequency Oscillation in Train-traction Network Coupling System of Electrified Railway
摘要
Abstract
The low-frequency oscillation phenomenon has been frequently occurred in China electrified railways. It caused the traction locked of the train and the protection tripped of power supply system as well as other accidents. In this paper, the mechanism of this low-frequency oscillation in train-traction network system and its influential factors are fully investigated through both simulation and theoretical studies. The frequency-domain impedance modeling method for voltage-source converter (VSC) is presented with considering specific operations conditions of the low-frequency oscillation. In the dq frame, the impedance model of the train-traction network system is derived. Based on the dominant pole, the influence of different available factors have been detailed studied, such as the number of trains and the controller parameters of onboard rectifier on the low-frequency oscillation of train-traction network system. Combined with the influence of voltage loop and current loop on the trains' impedance, changes of impedance in low-frequency band is summed when low-frequency oscillation occurs. The optimal sequence of adjusting control parameters is given to suppress low-frequency oscillation. Finally, the influence of parameters on the low-frequency oscillation were verified by the simulation and experimental results, which effectively proved the correctness of the conclusion.关键词
机车–供电网系统/低频振荡/阻抗分析/小信号模型Key words
train-traction network system/low-frequency oscillation/impedance-based analysis/small-signal modal分类
信息技术与安全科学引用本文复制引用
周毅,胡海涛,杨孝伟,何正友..电气化铁路车网耦合系统低频振荡分析[J].中国电机工程学报,2017,37(z1):72-80,9.基金项目
国家自然科学基金项目(51677154,51525702).Project Supported by National Natural Science Foundation of China (51677154, 51477145). （51677154,51525702）
