城市轨道交通直流牵引供电系统普遍存在接触网残压问题，直接威胁运营检修人员的人身安全，停电作 业时验电显示接触网带电，会导致运营检修作业无法正常开展；送电时线路测试不通过，会影响变电所正常送电 合闸。以福州市轨道交通 2 号线竹岐停车场出入场线接触网残压问题为例，通过对接触网残压进行理论分析与计 算，结合残压测试数据，分析接触网残压产生的原因，提出一套降低接触网残压的措施。经现场实际测试，可有 效地抑制接触网残压。

The catenary residual voltage in a direct-current (DC) traction power supply system is common problem encountered in the urban rail transit. It poses a direct threat to the safety of operators and maintenance personnel. This indicates that the catenary is energized during the electrical inspection of power outages, which leads to the failure of normal operation, maintenance, line testing. Moreover, this affects the normal operation of substations. This paper considers Fuzhou Metro Line 2 as an example, which has a catenary residual voltage issue at the entrance and exit lines of the Zhuqi parking lot. The causes of the catenary residual voltage issue were analyzed theoretically and based on calculations, in addition to the residual voltage test data collected from the experiments. Furthermore, measures to reduce the catenary residual voltage were proposed. The on-site test results demonstrate that the proposed measures can effectively suppress the catenary residual voltage.

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