Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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The Algorithms for Controlling AC Output Voltage of Z-Source Inverter Using Modified SVPWM

  • Tran Quang-Vinh (Department of Electrical Engineering, University Of Ulsan) ;
  • Chun Tae-Won (Department of Electrical Engineering, University Of Ulsan) ;
  • Son Jang-Kyung (Department of Electrical Engineering, University Of Ulsan) ;
  • Hee Lee-Hong (Department of Electrical Engineering, University Of Ulsan) ;
  • Ahn Jung-Ryol (Department of Electrical Engineering, University Of Ulsan)
  • Published : 2004.11.01
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Abstract

This paper deals with an algorithm for controlling ac output voltage of Z-source inverter using Modified SVPWM (abbreviated as MSVPWM). Unlike the conventional space vector pulse width modulation, MSVPWM has one extra shoot-through zero time $T_{sh}$. During shoot-through zero time, both switches in a leg are conducted simultaneously in order to boost inverter output voltage to any desirable value regardless the line voltage. The algorithm to control linearly the capacitor voltage is suggested to improve the performance of Z-source inverter system. The performance of Z-source inverter using above algorithms is demonstrated in simulation results using PSIM. Index terms-Z-source inverter (ZSI), shoot-through time, three-phase carrier-based PWM, space vector PWM (SVPWM), modified space vector PWM (MSVPWM).

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