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城市轨道交通短路故障的分析与计算是提高牵引供电系统安全运行能力及相关保护与控制技术的基础。首先建立精确的直流牵引供电系统模型,将整流机组等效成带内阻的电压源,建立等效模型并利用整流机组的外特性计算稳态短路电流。
Analysis and calculation of urban rail transit short-circuit fault is the basis to improve the safe operation ability of traction power supply system and related protection and control technology. Firstly, an accurate DC traction power supply system model is established. The rectifier is equivalent to a voltage source with internal resistance, and an equivalent model is established and the steady-state short-circuit current is calculated by using the external characteristics of the rectifier.