动车组升弓电磁暂态的仿真与测试  

Simulation and Measurement of Electromagnetic Transients at Pantograph Lifting for Electric Multiple Unit

作　　者：吴命利[1] 史丹[1] 郭晨曦[2] 宋可荐[1] 王晖[1] 

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]中国铁道科学研究院机车车辆研究所,北京100081

出　　处：《中国铁道科学》2014年第6期91-98,共8页China Railway Science

基　　金：中国铁路总公司科技研究开发计划项目(2013J010-A);中央高校基本科研业务费专项资金资助项目(2012JBZ006)

摘　　要：用开关的闭合操作模拟受电弓滑板与接触线的触碰过程，进而将动车组和电力机车的升弓过程简化为RLC二阶等效电路模型，并给出其中考虑弧长变化的升弓电弧模型；以CRH2型动车组为例，利用Mat-lab／Simulink仿真软件建立包括接触网电源、受电弓及车顶高压电缆的升弓仿真模型，并进行了试验验证；仿真研究接触网电源等值参数和车顶高压电缆等值参数对升弓电磁暂态的影响，并提出改善对策。结果表明：在车顶电缆等值参数不变的情况下，升弓电磁暂态的振荡频率主要受接触网电源等值电感的影响，持续时间及过电压峰值受其等值电阻和等值电感的共同影响；在接触网电源等值参数不变的情况下，升弓电磁暂态过电压和电缆电流受车顶电缆等值电容的影响；CRH2型动车组升弓电磁暂态过电压峰值可达60~70kV，振荡频率一般在40～70kH2，振荡持续时间一般在0．2～0．8mS；在车顶高压电气系统串联电感和并联RC滤波器可以改善CRH2型动车组升弓电磁暂态。Through describing the touching process of the strip and the contact wire as a switch changing to close, the lifting pantograph for an EMU or an electric locomotive can be simplified to a second order equivalent RLC series circuit. A lifting pantograph model considering the variation of the arc length is presented in this paper. Taking the CRH2 EMU as an example, a simulation circuit including external power source, pantograph and the high voltage cable on the car roof is established with Matlab/Simulink, and has been verified by tests. The influence of the power source and high voltage cable equivalent parame- ters on the electromagnetic transients is simulated. Then two countermeasures are put forward to improve CRH2 charging transient overvoltage. The results indicate that the oscillation frequency is mainly affected by the equivalent inductance, and the transient duration and peak voltage are influenced by both the equivalent inductance and resistance when keeping the cable configuration unchanged. The cable equivalent capacitance impacts on peak value voltage and current as the power supply equivalent parameters remain unchanged. For CRH2 EMU when lifting pantograph, the transient voltage is 60~70 kV, the oscillation frequency is 40~70 kHz and the transient duration is 0. 2~0. 8 ms. Inserting series inductors or adding parallel RC filters in the high voltage electric system on car roof can improve the electromagnetic transients for CRH2 EMU.

关 键 词：动车组 电磁暂态 升弓电弧 过电压 弓网关系 

分 类 号：U225.3[交通运输工程—道路与铁道工程]