Research on Fractional Order Control Algorithm for Suppressing Low Frequency Oscillation of Electrified Railway

The low frequency oscillation phenomenon in the electrified railway has threaten both safety and steady of the rail, and by changing the structure of control to improve damping ratio of the system, people try to change the phenomenon of such instability. This thesis try to make connection between the low frequency oscillation phenomenon in the electrified railway and the study of fractional control to start the study of fractional control in the low frequency oscillation phenomenon in the electrified railway. Firstly, the model of the s-domain of the controlled object is built, then the fractional-order controller is added, then the parameters of the fractional-order controller are determined and simulated, and the improved system simulation diagram is compared with the original system simulation diagram to further verify the fractional order. PI control has the advantage over traditional PI control. Finally summarize and look forward to fractional order control.