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PWM-based Integral Sliding-mode Controller for Unity Input Power Factor Operation of Indirect Matrix Converter

  • Rmili, Lazhar (Laboratory of Biophysics and Medical Technology, ISTMT, Tunis El-Manar University) ;
  • Hamouda, Mahmoud (Laboratory of Advanced Technology and Intelligent Systems, ENISo, Sousse University) ;
  • Rahmani, Salem (Laboratory of Biophysics and Medical Technology, ISTMT, Tunis El-Manar University) ;
  • Blanchette, Handy Fortin (Canada Research Chair in Energy Conversion and Power Electronics, ETS of Montreal) ;
  • Al-Haddad, Kamal (Canada Research Chair in Energy Conversion and Power Electronics, ETS of Montreal)
  • Received : 2016.03.14
  • Accepted : 2017.02.17
  • Published : 2017.07.20

Abstract

An indirect matrix converter (IMC) is a modern power generation system that enables a direct ac/ac conversion without the need for any bulky and limited lifetime electrolytic capacitor. This system also allows four-quadrant operation, generation of sinusoidal output voltage waveforms with variable frequency and amplitude, and control of input power factor. This study proposes a pulse-width modulation-based sliding-mode controller to achieve unity input-power factor operation of the IMC independently of the active power exchanged with the grid, as well as a fast dynamic response. The designed equivalent control law determines, at each sampling period, the appropriate q-axis component of the modulated input current to be injected into the grid through the LC input filter. An integral term of the error is included in the expression of the sliding surface to increase the accuracy of the control method. A double space vector modulation method is used to synthesize the direction of the space vector of the input currents as required by the sliding-mode controller and the space vectors of the target output voltages. Simulation and experimental results are provided to show the effectiveness and evaluate the performance of the proposed control method.

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