中文摘要：

分析了高压直流输电入地电流的机理,给出了入地电流在距离接地点产生地电位的表达式,以常用WXJ25型相敏轨道电路接收器为例,分析了入地电流对轨道电路信号传输状态的影响.计算结果表明,如果轨道电路中存在高压直流输电入地电流,就可能导致WXJ25型相敏轨道电路接收器驱动轨道继电器发生错误动作,这是需要高度重视的新问题.

英文摘要：

This paper analyzes the mechanism of high voltage DC leading into the ground and gives the calculation expression of ground potential producing at a distance of the HVDC from the grounding point. Take the commonly used WXJ25 type phased sensitive track circuit receivers for example, we analyze the impact of high voltage DC leading into the ground on the signal transmission status of the track circuit. The calculation results show that the receiver of WXJ25 type phase sensitive track circuit may drive the track circuit relay to make error actions if the current leading into the ground exists in the track circuit, thus resulting a new problem to which more attention should be paid.