Electric Railway Loufan Traction Station Of Shanxi Power Grid Harmonic Impact Analysis

With the rapid development of Shanxi electric railway, the harmonic problem is also more serious. In order to analyze the harmonic problems caused by the new Loufan traction station. In this paper, the main electric locomotive to simulate is SS4G in Loufan traction station. The simulation and test results show that the harmonic distribution of electric locomotive works in the first stage with the larger change of the switching angle. When the switching angle is about 40 degrees, the harmonic content is the smallest., because electric locomotive work during the second and third sections all-pass state as part of the bridge circuit, lead to small harmonic content changeand keep in a larger value. Therefore, when the electric locomotive works in the three and second sections, But by changing the all-pass bridge circuit opening angle to reduce the harmonic.