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中文摘要：
针对高速铁路动车组通过高架桥上过分相段的复杂电磁暂态过程,本文进行了过分相段暂态状态过程求解和评估。首先分析了过分相过电压过程及机理;然后建立了计及高架桥电气耦合的高速铁路过分相段的集中参数等值电路模型;其次对计及高架桥电气耦合的过电分相段中出现的4个暂态过程建立状态方程,求解得出过分相动车组弓头电压每个暂态过程的全响应波形,并评估了不同暂态过程和电气参数耦合对状态变量的影响;最后仿真对比分析了计及桥梁回路耦合与不考虑桥梁回路电气耦合时的过电分相全过程,计算和仿真结果验证了高架桥回路对过分相过电压有明显的泄流和抑制作用。
英文摘要：
To address the complex electromagnetic transient process for electric multiple unit （EMU） passing phase insulator on the viaduct of high-speed railway, the paper solved and evaluated the transient state process in detail. Firstly, the transient processes of EMU passing phase insulator and the generating mechanism of transient over-voltage were analyzed. Next, considering electrical coupling role of viaduct, the paper built e- quivalent circuit model based on lumped parameter related to phase insulator of high speed railway. Subsequently, the state equation of four transient processes in EMU passing phase insulator on the viaduct was established respectively, which was utilized to solve and obtain the waveform of the full response voltage on the pantograph. Further, the influences of different transient processes and electric parameters on the state variables were analyzed. Finally, through simulation, the paper compared and analyzed pantograph bead＇s voltage waveform in the total process of EMU passing electric split-phase in the case of considering or not considering electrical coupling of the viaduct. Calculation and simulation results revealed the discharge and suppression of the electrical coupling of virduct on over-voltage when EMU passes neutral section.
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