With the development of high-speed trains,the stable operation of traction control system on the basis of power trans-former has become a current research hot spot.Therefore,the study has explored the power transformer stability on the basis of voltage dynamics.Aiming at the problem of low-frequency oscillation of the system when multiple trains are accessed,the study utilizes the self-immunity control for the design of the control method and improves the self-immunity control by using the smooth continuous non-linear function.Simulation analysis shows that the proposed control method has no overshooting and more stable operation.Compared with the conventional controller,the time to reach the given value under voltage step change is reduced by 88.89%for the self-im-mune control.Hardware-in-the-loop tests show that the active disturbance rejection controller takes 70%less time than the PI con-troller to reach a given value of voltage.The results show that the research-designed power transformer self-resistant control method can improve the system's ability to resist disturbances,regulate the contradiction between overshooting and speed,and suppress low-frequency oscillations.The control method has positive application value and reliability in traction control system based on power transformer.
关键词
电压动态/电力变压器/自抗扰控制/牵引控制系统/稳定性
Key words
voltage dynamics/power transformer/active disturbance rejection control/traction control system/stability
维普
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