Abstract: The performance of the power supply system of Wenzhou rail transit line S1, especially the performance of the traction power supply system, is easily affected by in-phase power supply devices and the severe weather in the coastal area. In order to ensure the quality of traction power supply, this paper proposes a scheme based on small-unit power supply. This scheme can not only provide cross-division traction power supply from catenaries and switching substations, but also reduce the delays caused by failures, demonstrating potential value of application in suburban rail field.

Key words: suburban rail, traction power supply system, small-unit power supply, catenary

摘要： 温州S1线供电系统尤其是牵引供电系统性能，易受到同相供电装置和沿海地区恶劣天气的影响。为保障牵引供电质量，提出一种基于小单元的循环供电方案。该方案不但可以实现牵引供电从接触网和开闭所进行越区，还可以缩短故障延时，在市域铁路领域具有一定潜在应用价值。

关键词: 市域铁路, 牵引供电系统, 小单元供电, 接触网