车体过电压分析及抑制措施研究.doc


车体过电压分析及抑制措施研究#
闻映红1,陈嵩1,买华2*
(1. 北京交通大学电磁兼容实验室,北京 100044;
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2. 北京铁路信号有限公司,北京 102613)
摘要:高速动车组在弓网离线时,车体上会产生较强的过电压,有可能导致车载设备发生故
障甚至损坏。本文利用传输线理论,建立动车组与轨道构成的传输线等效模型,分析了车体
过电压的产生机理;进一步运用 EMTP 电力系统电磁暂态分析软件得到了车体过电压沿车
体长度方向呈纵向梯度分布的规律,并根据仿真结果拟合得出与车体过电压的工程计算式。
研究结果表明,接地电阻阻抗模是影响车体过电压的重要因素;并据此提出了抑制车体过电
压的具体措施,对工程实践具有指导意义。
关键词:高速动车组;过电压;接地电阻;传输线
中图分类号:
Study on Surge Voltage of a Rolling Stock’s Body and its
Suppression Methods
Wen Yinghong1, Chen Song1, Mai Hua2
(1. Beijing Jiaotong University patibility Laboratray, Beijing 100044;
2. Beijing Railway Signal Co., Ltd., Beijing 102613)
Abstract: A strong surge voltage of a rolling stock’s body may cause vehicle equipment failure
and even damaged when high-speed emu pantograph offline. In order to analyze the production
mechanism of the surge voltage, transmission line equivalent model of the EMUs and the orbit is
established base on transmission line theory; Then, with using EMTP power system
ic transient analysis software the law has been found that the surge voltage along the
length direction of the vehicle is longitudinal gradient distribution; Furthermore, the engineering
formula about the surge voltage of a rolling stock’s body is given according to the results data
fitting. Results show that the norm of the grounding impedance is the key factor of the surge
voltage. After