Predictive Direct Power Control Strategy for Electric Drive System of Special Vehicle

doi:10.3969/j.issn.1000-1093.2021.10.008

Abstract

Abstract: A predictive direct power control strategy is proposed for large current harmonics and power fluctuation of pulse width modulation (PWM) rectifier in electric drive system of special vehicle, and a current observer is designed based on the traditional control strategy. The disturbance caused by system parameter mismatch is estimated by the predictive control method and compensated in real time, and then the predicted current value at the next time is calculated by current prediction. A dynamic model for three-phase PWM rectifier is established. The current value after change in inductance can be predicted by the designed current observer and compared with the actual current value. Finally, the system error is compensated by estimating the system disturbance. Simulated results show that the proposed predictive direct power control strategy can be used effectively to suppress the current harmonic component and power pulsation, realize the normal operation under the condition of inductance parameter change, and better improve the quality of special vehicle power supply，and is available for the special vehicle electric drive system.

Key words: specialvehicle, electricdrivesystem, pulsewidthmodulationrectifier, predictivedirectpowercontrol, currentobserver

CLC Number:

TJ810.2

HUANG Qing, NI Dacheng， MA Changjun, LUO Derong, HUANG Shoudao, LI Zhongqi, CHENG Wangyang, YAO Chao, DENG Haijun, DONG Ping, LU Xiongjian. Predictive Direct Power Control Strategy for Electric Drive System of Special Vehicle[J]. Acta Armamentarii, 2021, 42(10): 2123-2129.

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