Analysis and Suppression of Low Frequency Oscillation between EMUs and Traction Network in High-Speed Railways

This book focuses on the low-frequency oscillation between EMUs and traction network in high-speed railways. As the power source of high-speed trains, the traction network's power performance directly affects the trains' safe and stable operation. However, the low-frequency oscillation between EMUs and traction network will produce the fluctuation of voltage or current, which results in the poor power quality, electrical device’s failure, and even interruption of traction power. Therefore, it is important to reveal the mechanism of low-frequency oscillation and propose suppression strategies. This book systematically shows the newest research results of analysis and suppression of low-frequency oscillation between EMUs and traction network in high-speed railways, especially in the modeling methods of vehicle-grid system and suppression strategies for low-frequency oscillation. These methods or strategies can provide important references and help researchers, scholars, and engineers with traction power technology in high-speed railways. The main contents include the overview of low-frequency oscillation between EMUs and traction network, the introduction of main modeling methods for vehicle-grid system, especially single-phase rectifier, the line-side converter control algorithms in vehicles for the suppression of low-frequency oscillation, the traction substation power compensation strategies for the suppression of low-frequency oscillation, etc.