Reduction method of high harmonic currents on the AC side of the diode rectifier circuits in the AC electric railways

摘要

The authors propose a method for suppressing the generation of high harmonic currents on the AC side of the diode rectifier circuits in AC electric railways by connecting the CR series circuit in parallel with the load on the DC side of the rectifier circuits. A theoretical analysis of a single-phase rectifier circuit adopting this method is presented. The two operating modes are separated, and the circuit is analyzed for each mode. From the experimental and theoretical results, it is confirmed that this method adequately reduced the harmonics and improves the power characteristics.