高铁馈线电缆金属护层环流影响因素仿真研究

Simulation Study on Factors Influencing Circulation Current of Metal Sheaths of High Speed Railway Feeder Cables

针对馈线电缆屏蔽层和铠装层的不同接地方式,利用CDEGS仿真软件仿真了电缆线芯电流大小、电缆长度、电缆间距、电缆铠装层厚度以及电缆双端接地等因素对护层环流大小的影响,找出了护层环流的主要影响因素,并给出了减小护层环流的电缆选择与敷设建议。

With regard to different earthing modes for shielding layers and cable armors of feeder cables, on the basis of simulating the current capacity of cable core wire by means of CDEGS based simulation software, with consideration of degrees of influencing the circulating current caused by factors of cable length, spacing between cables, thickness of cable armor layer earthing of cable double ends, the main factors affecting the circulating current of cable sheath, and proposals has been put forward for cable selection and laying so as to minimize the circulating current.