摘要
高速动车组车体接地系统是分相过电压的泄放通道,合理的接地技术能有效抑制车体过电压。针对此问题,划分并分析了动车组过车载自动电分相时的各暂态过程,构建了过分相时暂态过电压电流流向的框架。基于动车组车体的实际结构,利用Matlab/Simulink对8编组CRH2A型动车组过分相的其中2个暂态过程搭建了车-网耦合等效电路模型。仿真模型巧妙地将高速铁路过分相、车顶高压贯通电缆和车体接地系统结合在一起,通过仿真对比得到了接地技术对车体过电压的影响规律,结合正常工况下车体电流随车体接地技术的变化特征,就动车组过分相时的最佳接地技术提出了相应的建议。
The grounding system of high-speed electric multiple unit（EMU）body is the vent channel of transient over-voltage during EMU passing neutral section device and reasonable grounding technology will suppress the vehicle bodyover-voltage effectively. In reaction to the phenomenon,the paper divided and analyzed the process of EMU passing thevehicle automatic electrical phase,built the current flow framework of transient over-voltage. Based on the structure ofEMU body,the Matlab/Simulink circuit models of car-network coupling for two transient processes during an eight mar-shalling CRH2 A EMU passing the neutral section device were built. The simulation models integrated automatic electri-cal phase and roof high voltage cable with EMU grounding system subtly and the comparisons of simulation results showhow the EMU body grounding technology influence the over-voltage transmission in the vehicle body. At last,the paperproposed suggestions with regard to the optimal vehicle body grounding technology based on the influences law ofgrounding technology on vehicle body current under normal working condition.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2016年第5期1-8,共8页
Proceedings of the CSU-EPSA
基金
国家自然科学基金资助项目(U1134205
51377136)
关键词
高速动车组
车体过电压
车载自动电分相
接地技术
车体电流
high-speed electric multiple unit（EMU）
vehicle body over-voltage
vehicle automatic electrical phase
grounding technology
vehicle body current
