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一、概述交流电气化铁道是以钢轨和大地为回流的不平衡供电系统,无论是机车正常运行状态,还是接触网短路状态,在电流进入钢轨处的大地附近,都将引起地电位升高。当通信局(站)的接地装置或地下通信电缆位于地电位升高区域以内时,就可能在通信系统中产生电压及影响电流,从而对通信设备和施工、维修工作人员造成干扰或危险。因此,在铁道电气化工程设计中,应根据具体情况,估算上述影响程度。
I. Overview AC electrified railway is an unbalanced power supply system with rail and earth as the return flow. Whether the locomotive is in normal operation or the catenary is short-circuited, the current will rise to the ground near the rail. When the grounding device of the communication station (station) or the underground communication cable is located within the ground potential rise area, voltage and current may be generated in the communication system, causing interference or danger to communication equipment and construction and maintenance workers. Therefore, in the design of railway electrification engineering, the above impact should be estimated according to the specific circumstances.