Abstract：The stability of PWM rectifiers with deadbeat control method is influenced seriously by control delay and low-pass filters inserted in current-sample circuit in traction applications. The influence principle is analyzed in details in this paper. Open-loop current predictive method is often adopted to solve the problem mentioned above. But the predictive current precision is affected by all kinds of factors such as supply voltage estimated error, plant model mismatch, dead-zone time. The existing of current predictive error will aggravate the distortion of supply current. The current predictive algorithm based on repetitive control observer is proposed in this paper to improve the current predictive precision. The design principle of the repetitive observer is given and the stability is discussed. The experiment results show that the proposed method can minimize the current predictive error and improve the performance of PWM rectifiers with deadbeat control method.
高吉磊, 黄先进, 林飞, 郑琼林. 基于重复观测器的PWM整流器无差拍控制[J]. 电工技术学报, 2010, 25(6): 47-53.
Gao Jilei, Huang Xianjin, Lin Fei, Zheng Qionglin. Deadbeat Control Strategy for PWM Rectifiers Based on Repetitive Observer. Transactions of China Electrotechnical Society, 2010, 25(6): 47-53.
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