在牵引供电系统中,牵引负荷电流经钢轨流回牵引变电所的方式,称为轨回流;经大地流回牵引变电所的方式,称为地回流。本文针对这两种回流方式进行分析。 In the traction power supply system, the traction load current flows back to the traction substation through the rails, which is called rail return flow. The way of returning the traction substation through the earth back is called ground return flow. This article analyzes the two reflux methods.