Abstract:
There is a problem that the control performance of an on-board dual pulse width modulation(PWM) rectifier is susceptible to model uncertainty and changes in operating conditions of the train, such as input voltage, power level, and circuit parameters, etc. Thus a dual closed-loop control algorithm is proposed based on active disturbance rejection control(ADRC) and model predictive direct power control(MPDPC). An error-driven ADRC(EADRC) controller is constructed based on the ADRC theory in the outer loop to regulate the DC side voltage. The inner loop combines a power compensation scheme based on the internal mode principle with a two-step MPDPC algorithm to control the AC side current signal. Simulations and experiments are conducted to compare the proposed ADRC-MPDPC algorithm with the conventional proportional integral-based direct power control(PI-DPC) algorithm and the PI-MPDPC method, and the results demonstrate that the proposed strategy exhibits superior dynamic characteristics and robustness in scenarios such as system startup, load change, and operating conditions switching.