Research on APF Compensation Current Hysteresis Control of Electrified Railway

For the APF (active power filter) applied in the electrified railway traction power supply system, the APF (active power filter) is applied to the traction power supply system of electrified railway, Based on the study of traditional hysteresis control, the working principle of improved bipolar hysteresis control, unipolar hysteresis control and optimized unipolar hysteresis control is studied in this paper, and the switching frequency is analyzed. On this basis, the experimental research is carried out. The experimental results show that the optimized unipolar hysteresis control in APF compensation power The advantages of flow control.