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A DSP-Based Dual-Loop Peak DC-link Voltage Control Strategy of the Z-Source Inverter
IEEE TRANSACTIONS ON POWER ELECTRONICS (2012)
  • Omar Ellabban, Helwan University
  • Joeri Van Mierlo, Vrije Universiteit Brussel
  • Philippe Lataire, Vrije Universiteit Brussel
Abstract

This paper proposes a direct dual-loop peak dc-link voltage control strategy, with outer voltage loop and inner current loop, of the Z-source inverter (ZSI). The peak dc-link voltage is estimated by measuring both the input and capacitor voltages. With this proposed technique, a high-performance output voltage control can be achieved with an excellent transient performance including input voltage and load current variationswithminimized nonminimum phase characteristics caused by the right half-plane zero in the control to peak dc-link voltage transfer function. Both controllers are designed based on a third-order small-signal model of the ZSI using the direct digital control method. The performance of the proposed control strategy is verified by simulation and experimental results of a 30-kW ZSI prototype.

Keywords
  • DC-link voltage control,
  • direct digital control,
  • dual-loop control,
  • Z-source inverter.
Publication Date
September, 2012
Citation Information
Omar Ellabban, Joeri Van Mierlo and Philippe Lataire. "A DSP-Based Dual-Loop Peak DC-link Voltage Control Strategy of the Z-Source Inverter" IEEE TRANSACTIONS ON POWER ELECTRONICS Vol. 27 Iss. 9 (2012)
Available at: http://works.bepress.com/omar_ellabban/22/