基于集肤效应的地铁短路时间常数研究

在充分利用广州地铁实测数据基础上，通过建立恰当的短路计算模型，证明了在地铁短路过程的发展阶段其短路电流的时间常数是不断变化的；同时，对集肤效应进行了深入的理论分析，通过对实际情况的适当简化，进行了相关仿真研究；在仿真结果的基础上，总结了地铁走行轨在集肤效应的影响下电阻和电感参数随频率变化的情况。

Study of Time Constant about Short Circuit of Metro Based on Skin Effect

In the full use of the measured data of Guangzhou Metro, this paper proved the time constant is changing with the development of the short circuit process through establish an appropriate short circuit calculation model; at the same time, it made a deep theoretical analysis about skin effect, and did some correlation simulation research by simplify the actual situation; on the basis of the simulation results, the paper summarized the change of resistance and inductor parameters of metro rail line under the influence of skin effect with frequency changes.