摘要
高速铁路车网耦合系统出现电压低频振荡现象,导致多个动车所的多台动车组牵引封锁,目前对其机理研究处于初期阶段。首先根据赫尔维茨稳定判据以及瞬态能量平衡方程判定车网开环系统的稳定性,并采用小增益定理分析电压振荡的影响因素。接着,基于十导体链式电路搭建精确的高速铁路全并联AT(autotransformer)供电系统模型,并基于瞬态电流控制建立CRH3型动车组电气模型。在此基础上,实现车网系统的互联,并仿真再现电压振荡现象。随后,采用FFT、小波分析及Prony分析的方法实现了振荡电压低频成份的辨识。
With voltage low frequency oscillation of high-speed railway traction network and EMU coupling system, many EMU of different places appear traction blockade. Mechanism of this phenomenon is currently in its early stages. Firstly, the transient energy balance equation of traction network and EMU coupled system are derived. Secondly, the open-loop stability of the traction network and EMU system is determined and the factors of voltage oscillations are analyzed with the small gain theorem. Thirdly, the all-parallel autotransformer traction supply model is precisely built by using the 10-conductor chain circuit and the CRH3 EMU electrical model is established based on the transient current control. On this basis, the interconnected system of the traction network and EMU is implemented, and voltage oscillation phenomenon is reproduced. In addition, the frequency of the oscillating voltage is accurately extracted by using FFT method, wavelet algorithm and Prony method.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2016年第1期24-32,共9页
Power System Protection and Control
基金
高速铁路基础研究联合基金重点项目(高速铁路电力牵引系统安全性预测与控制)(U1134205)
