Electronic Science and Technology ›› 2021, Vol. 34 ›› Issue (11): 67-74.doi: 10.16180/j.cnki.issn1007-7820.2021.11.011

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Improved Current Prediction Deadbeat Control Method for Active Power Filter

REN Lei1,FU Ziyi1,LEI Haixun2   

  1. 1. School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454150,China
    2. Chang'an Yiyang Power Generation Co.Ltd,Yiyang 413000,China
  • Received:2020-07-10 Online:2021-11-15 Published:2021-11-16
  • Supported by:
    National Key R&D Program of China(2016YFC0600906)


In view of the delay and inductance deviation coefficient problem in the process of deadbeat control, an improved current prediction deadbeat control method for active power filter is proposed. This method uses Lagrangian second-order polynomial interpolation method combined with repeated control to predict the reference current, which improves the accuracy of reference current prediction. Moreover, the compensation current calculation formula is constructed and the weight coefficient which can also reduce the influence of inductance parameter deviations on system stability is introduced to reduce the influence of current ripple. The value principle of the weight coefficient is given by the system stability analysis. MATLAB simulation results show that after filtering by this method, the grid-side current distortion rate is reduced to 3.38%, which indicates that the proposed method can effectively improve the waveform quality and reduce the influence of the inductance parameter deviation on the control performance.

Key words: active power filter, deadbeat control, delay, inductance variation, improved current prediction, Lagrangian interpolation, weight coefficient, current ripple

CLC Number: 

  • TP29