JOURNAL OF LIGHT INDUSTRY

CN 41-1437/TS  ISSN 2096-1553

Volume 36 Issue 2
April 2021
Article Contents
WANG Nan, DOU Zhifeng, LI Yanyan and et al. Current predictive control method of three-level ANPC grid-connected inverter based on optimized cost function[J]. Journal of Light Industry, 2021, 36(2): 92-101. doi: 10.12187/2021.02.012
Citation: WANG Nan, DOU Zhifeng, LI Yanyan and et al. Current predictive control method of three-level ANPC grid-connected inverter based on optimized cost function[J]. Journal of Light Industry, 2021, 36(2): 92-101. doi: 10.12187/2021.02.012 shu

Current predictive control method of three-level ANPC grid-connected inverter based on optimized cost function

  • Received Date: 2020-04-02
  • Aiming at the problems of complicated calculation process, large neutral pointe potential fluctuation and large output current harmonic of the traditional three-level ANPC grid-connected inverter limited control set model predictive control, a current control method of three-level ANPC grid-connected inverter based on optimized cost function was proposed. This method simplified the steps of establishing the intermediate variable of the DC side mid-point voltage offset ΔUdc and the three-phase switching state Sx in the traditional model predictive control method.Under the static αβ coordinate system, the relationship between load current i, ΔUdc and Sx was used to directly establish a mathematical model.Through the real-time calculation of 27 switch states, the optimal output switch state was selected.Simulation and experiment result showed that the method effectively reduced the total harmonic distortion rate and achieved the effect of suppressing midpoint voltage fluctuations.
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