Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Model Predictive Power Control of a PWM Rectifier for Electromagnetic Transmitters

  • Zhang, Jialin (Faculty of Information, Beijing University of Technology) ;
  • Zhang, Yiming (Faculty of Information, Beijing University of Technology) ;
  • Guo, Bing (Faculty of Information, Beijing University of Technology) ;
  • Gao, Junxia (Faculty of Information, Beijing University of Technology)
  • Received : 2017.08.16
  • Accepted : 2018.02.03
  • Published : 2018.05.20
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Abstract

Model predictive direct power control (MPDPC) is a widely recognized high-performance control strategy for a three-phase grid-connected pulse width modulation (PWM) rectifier. Unlike those of conventional grid-connected PWM rectifiers, the active and reactive powers of permanent magnet synchronous generator (PMSG)-connected PWM rectifiers, which are used in electromagnetic transmitters, cannot be calculated as the product of voltage and current because the back electromotive force (EMF) of the generator cannot be measured directly. In this study, the predictive power model of the rectifier is obtained by analyzing the relationship among flux, back EMF, active/reactive power, converter voltage, and stator current of the generator. The concept of duty cycle control in the proposed MPDPC is introduced by allocating a fraction of the control period for a nonzero vector and rest time for a zero vector. When nonzero vectors and their duration in the predefined cost function are simultaneously evaluated, the global power ripple minimization is obtained. Simulation and experimental results prove that the proposed MPDPC strategy with duty cycle control for the PMSG-connected PWM rectifier can achieve better control performance than the conventional MPDPC-SVM with grid-connected PWM rectifier.

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References

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