地铁直流供电系统的短路故障仿真与保护策略研究

Research on Short Circuit Fault Simulation and Protection Strategy of Metro DC Power Supply System

分析了地铁直流供电系统的故障类型,基于MATLAB/Simulink建立了直流供电系统的短路故障仿真模型,得到了不同短路情况下的电流仿真波形,通过仿真结果,分析了地铁直流线路短路故障电流的特点。根据直流保护需要考虑的因素,提出了地铁直流供电系统短路故障的保护策略和原则。

The fault types of the metro DC power supply system are analyzed.The short-circuit fault simulation model of the DC power supply system is established based on Matlab/Simulink,and the current simulation waveforms under different short-circuit conditions are obtained.Based on the simulation results,the short-circuit fault current of the subway DC line is analyzed.According to the factors that need to be considered for DC protection,the protection strategies and principles of short-circuit faults in subway DC power supply systems are proposed.