Journal of Electrical Engineering ›› 2022, Vol. 17 ›› Issue (1): 129-136.doi: 10.11985/2022.01.017

Previous Articles     Next Articles

扫码分享

Low Frequency Oscillation Suppression Method of Traction Network Based on Sliding Mode Control

HU Yingxin1(), NING Zhihao2(), LAN Zheng1(), ZENG Jinhui1, JIANG Fei3, HE Dong1   

  1. 1. College of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007
    2. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410036
    3. College of Electrical and Information Engineering, Changsha University of Science and Technology, Changsha 410004
  • Received:2021-09-17 Revised:2021-11-09 Online:2022-03-25 Published:2022-05-06
  • Contact: LAN Zheng E-mail:928889564@qq.com;nzh22@163.com;lanzheng20@foxmail.com

Abstract:

Low frequency oscillation of traction network will cause traction blocking of multiple units and affect the safe and stable operation of electrified railway. Aiming at the low-frequency oscillation problem of CRH5 EMU networking side rectifier, a low-frequency oscillation suppression method based on sliding mode control is proposed. Firstly, the small signal modeling method is used to establish the loop ratio matrix model of vehicle network coupling system, and the stability is analyzed by using the improved sum norm criterion and amplitude frequency characteristic curve. Secondly, the voltage outer loop sliding mode controller is designed to replace the traditional proportional integral(PI) controller to suppress the low-frequency oscillation of traction network. Finally, the simulation model of the rectifier on the networking side of the motor car based on the traditional PI controller and sliding mode controller is built on the Matlab/Simulink simulation platform. The simulation results show that the proposed control method has better robustness and can better suppress the low-frequency oscillation of the traction network, which verifies the correctness and effectiveness of the proposed method.

Key words: Traction network, low frequency oscillation, sum norm criterion, sliding mode control

CLC Number: