摘要
针对国内电气化铁路频繁发生低频振荡现象并造成机车牵引闭锁、供电系统保护跳闸等事故,围绕机车—供电网(车网)低频振荡的产生机理、影响因素进行理论与仿真分析,推导得到了车网阻抗模型。采用阻抗比稳定性判据,分析了机车数量、供电网等效阻抗和机车整流器控制参数等对车网系统低频振荡现象的影响规律。利用详细的车网时域仿真模型,验证了频域阻抗模型分析所得结论,为更好地抑制车网系统低频振荡现象提供了参考依据。
The low-frequency oscillation phenomenon had been frequently occurred in China electrified railways,which caused the traction locked of the train and the protection tripped of power supply system as well as other accidents. The mechanism of this lowfrequency oscillation in train-traction network system and its influential factors were fully investigated through both simulation and theoretical studies. The impedance modeling method for converter was presented. Based on the stability criterion of impedance rate,the influence of different available factors had been detailed studied,such as the number of trains,equivalent impedance of traction network and the control parameters of onboard rectifier on the low-frequency oscillation of train-traction network system. The results of the theoretical analysis in impedance model were verified by the detailed time domain simulations,which provided a reference for suppressing the low-frequency oscillation in train-traction network systems.
出处
《机车电传动》
北大核心
2017年第6期64-68,共5页
Electric Drive for Locomotives
基金
湖南省教育厅科学研究项目(16C1045)
关键词
车网系统
低频振荡
阻抗模型
阻抗比稳定性判据
train-traction network system
low-frequency oscillation
impedance model
stability criterion of impedance ratio
