DC Side Current Harmonics Analysis of Electric Traction System of Metro Vehicles

Abstract:

A theoretical inference was made on the DC side current contents of traction inverter and DC supply network based on the analysis of electric traction system of urban metro vehicles. Then the function of line filter was analyzed in detail. Finally, DC supply network current harmonics were quantitatively analyzed under the typical square wave mode with the MATLAB simulation software. Simulation results show that the theoretical analysis is valid and the derived formula provides a method to assess the current harmonics and power loss of DC supply network.