TRACTION POWER SUPPLY SYSTEM AND ENERGY FEEDBACK APPARATUS THEREFOR

摘要

A traction power supply system and an energy feedback apparatus therefor. The input end of a single-phase inverter is connected to a direct current bus of the traction power supply system, and the output end is connected to a primary side of a high-frequency transformer, for performing single phase inversion on direct current in the direct current bus and then outputting the current; a secondary side of the high-frequency transformer is connected to the input end of a rectifier, for performing voltage transformation on a received signal and then outputting the signal; the output end of the rectifier is connected to the input end of a three-phase inverter, for rectifying the received signal and then outputting the signal; the output end of the three-phase inverter is connected to a secondary side of a traction transformer of the traction power supply system, for performing three-phase inversion on the received signal and then outputting the signal, so as to achieve energy feedback. By using a lightweight and miniaturized high-frequency transformer, the energy feedback apparatus not only facilitates construction and installation but also avoids the formation of loop current, thereby improving the energy utilization efficiency.